Document:

EX-4.18

 EXHIBIT 4.18 

DESCRIPTION OF DOMINION ENERGY, INC. 

2019 SERIES A CORPORATE UNITS 
 The
following description of our 2019 Series A Corporate Units, which are registered under Section 12(b) of the Securities Exchange Act of 1934, as amended, is a summary and is qualified in its entirety by reference to the 2019 Series A Purchase
Contract and Pledge Agreement, dated June 14, 2019 (the “purchase contract and pledge agreement”), among us, Deutsche Bank Trust Company Americas, as the purchase contract agent (the “purchase contract agent”), and HSBC Bank
USA, National Association, as the collateral agent (the “collateral agent”), custodial agent (the “custodial agent”) and securities intermediary (the “securities intermediary”), and our articles of incorporation. The
purchase contract and pledge agreement and our articles of incorporation are incorporated by reference as exhibits to the Annual Report on Form 10-K of which this exhibit is a part. We encourage you to read
the purchase contract and pledge agreement and the applicable sections of our articles of incorporation for more information. 
 References herein to
“we,” “our,” “us,” the “Company” or “Dominion Energy” refer to Dominion Energy, Inc., a Virginia corporation. References herein to “you” or “your” refer to a holder of a 2019
Series A Corporate Unit or other applicable security. 
 Description of the Equity Units 

General 
 In June 2019, under the purchase contract and
pledge agreement, we issued 16,100,000 2019 Series A Equity Units (“Equity Units”), initially in the form of 16,100,000 2019 Series A Corporate Units (“Corporate Units”). Each Corporate Unit has a stated amount of $100. 

Each Corporate Unit consists of: 
  

	(1)	 a purchase contract under which: 

 

	 	•	 	 the holder agrees to purchase from us on June 1, 2022, which we refer to as the “purchase contract
settlement date,” and we agree to sell to the holder, unless the purchase contract terminates prior to that date as described under “Description of the Purchase Contracts—Termination” or is settled early as described under
“Description of the Purchase Contracts—Early Settlement” or “— Early Settlement Upon a Fundamental Change,” for $100, a number of shares of our common stock equal to the applicable settlement rate described under
“Description of the Purchase Contracts—Purchase of Common Stock,” “— Early Settlement” or “— Early Settlement Upon a Fundamental Change,” as the case may be, plus, in the case of an early
settlement upon a fundamental change, an additional make-whole amount of shares as described under “— Early Settlement Upon a Fundamental Change—Calculation of Make-Whole Shares;” and 

 

	 	•	 	 we pay to the holder quarterly contract adjustment payments at the rate of 5.50% of the stated amount of $100 per
year, subject to our right to defer such contract adjustment payments, payable in cash, shares of our common stock or a combination thereof, at our election; and 

 

	 	(2)	 either: 

  

	 	•	 	 a 1/10, or 10%, undivided beneficial ownership in one share of 1.75% Series A Cumulative Perpetual Convertible
Preferred Stock, without par value, with a liquidation preference of $1,000 per share (the “convertible preferred stock”), issued by us; or 

  

	 	•	 	 following a successful optional remarketing, the applicable ownership interest in a portfolio of
U.S. Treasury securities, which we refer to as the “Treasury portfolio.” 

 “Applicable ownership interest”
means, with respect to a Corporate Unit and the U.S. Treasury securities in the Treasury portfolio, (1) a 1/10, or 10%, undivided beneficial ownership interest in $1,000 face amount of U.S. Treasury securities (or principal or interest
strips thereof) included in the Treasury portfolio that matures on or prior to the purchase contract settlement date and (2) a 0.04375% undivided beneficial ownership interest in $1,000 face amount

 
of U.S. Treasury securities (or principal or interest strips thereof) included in the Treasury portfolio that mature on or prior to the purchase contract settlement date, which results in an
amount equal to the dividend payment that would have been due in respect of the convertible preferred stock on such date (without giving effect to any increase of the dividend rate following a successful remarketing, and whether or not such dividend
is authorized or declared). 
 The fair market value of the Corporate Units we issue is recorded in our financial statements based on an allocation between
the purchase contracts and the convertible preferred stock in proportion to their respective fair market values at the time of issuance. Under the purchase contract and pledge agreement, you are deemed to have agreed to allocate the entire purchase
price to your convertible preferred stock. 
 As long as a unit is in the form of a Corporate Unit, any ownership interest in a share of convertible
preferred stock or, solely with respect to the Treasury securities described in clause (1) of the definition applicable ownership interest, any applicable ownership interest in the Treasury portfolio forming a part of the Corporate Unit will be
pledged to us through the collateral agent to secure your obligation to purchase our common stock under the related purchase contract. 
 Creating
Treasury Units by Substituting a Treasury Security for Convertible Preferred Stock 
 Each holder of 10 Corporate Units may create, at any time other
than (i) if we elect to conduct an optional remarketing, during the period from 5:00 p.m., New York City time, on the second business day immediately preceding the first day of any optional remarketing period until the settlement date of such
remarketing or the date we announce that no successful optional remarketing has occurred during the optional remarketing period, (ii) following any successful remarketing and (iii) after 5:00 p.m., New York City time, on the second
business day immediately preceding the first day of the final remarketing period (we refer to each such period as a “blackout period”), 10 2019 Series A Treasury Units (“Treasury Units”) by substituting for the share of
convertible preferred stock that is a component of 10 Corporate Units a zero-coupon U.S. Treasury security with a principal amount of $1,000 that matures on or prior to June 1, 2022 (e.g., CUSIP
No. 912820V46), which we refer to as a “Treasury security.” This substitution would create 10 Treasury Units, and the related share of convertible preferred stock would be released to the holder and would be separately tradable from
the Treasury Units. Because the convertible preferred stock is issued with a liquidation preference of $1,000 per share, holders of Corporate Units may make this substitution only in integral multiples of 10 Corporate Units. 

Each Treasury Unit will consist of: 
  

	 	(1)	 a purchase contract under which: 

 

	 	•	 	 the holder agrees to purchase from us on the purchase contract settlement date, unless the purchase contract
terminates prior to that date as described under “Description of the Purchase Contracts— Termination” or is settled early as described under “Description of the Purchase Contracts—Early Settlement” or “— Early
Settlement Upon a Fundamental Change,” for $100, a number of shares of our common stock equal to the applicable settlement rate, plus, in the case of an early settlement upon a fundamental change, an additional make-whole amount of
shares; and 

  

	 	•	 	 we will pay to the holder quarterly contract adjustment payments at the rate of 5.50% of the stated amount of
$100 per year, subject to our right to defer such contract adjustment payments, payable in cash, shares of our common stock or a combination thereof, at our election; and 

 

	 	(2)	 a 1/10 undivided beneficial ownership interest in a Treasury security. 

The term “business day” means any day other than a Saturday or a Sunday or any other day on which banking institutions and trust companies in New
York City, New York are authorized or required by law or executive order to remain closed. 
 To create 10 Treasury Units, a holder is required to: 

 

	 	•	 	 deposit with the collateral agent a Treasury security, which must be purchased in the open market at the expense
of the Corporate Unit holder, unless otherwise owned by the holder; and 

  

	 	•	 	 transfer to the purchase contract agent 10 Corporate Units, accompanied by a notice stating that the holder of
the Corporate Units has deposited the Treasury security with the collateral agent, and requesting that the purchase contract agent instruct the collateral agent in writing to release the related share of convertible preferred stock.

 Promptly following receipt of written instructions from the purchase contract agent and receipt of the
Treasury security, the collateral agent will release the related share of convertible preferred stock from the pledge and deliver it to the transfer agent on behalf of the holder, free and clear of our security interest. The purchase contract agent
or transfer agent, as applicable, then will: 
  

	 	•	 	 cancel the 10 Corporate Units; 

 

	 	•	 	 transfer the related share of convertible preferred stock to the holder; and 

 

	 	•	 	 deliver 10 Treasury Units to the holder. 

The Treasury Unit holder’s beneficial ownership interest in the Treasury security will be pledged to us through the collateral agent to secure the
holder’s obligation to purchase our common stock under the related purchase contracts. The share of convertible preferred stock thereafter will trade and be transferable separately from the Treasury Units. 

Holders who create Treasury Units or recreate Corporate Units, as discussed below, will be responsible for any taxes, governmental charges or other fees or
expenses (including reasonable fees and expenses of the collateral agent and its counsel) payable in connection with substitutions of collateral. See “Certain Provisions of the Purchase Contract and Pledge Agreement—Miscellaneous.”

 Recreating Corporate Units from Treasury Units 
 Each
holder of 10 Treasury Units has the right, at any time other than during a blackout period, to substitute for the related Treasury security held by the collateral agent one share of convertible preferred stock for each such 10 Treasury Units. This
substitution would recreate Corporate Units and the applicable Treasury security would be released to the holder. Because the convertible preferred stock has a liquidation preference of $1,000 per share, holders of Treasury Units may make the
substitution only in integral multiples of 10 Treasury Units. 
 To recreate 10 Corporate Units, a holder is required to: 

 

	 	•	 	 deposit with the collateral agent one share of convertible preferred stock, which must be purchased in the open
market at the expense of the Treasury Unit holder, unless otherwise owned by the holder; and 

  

	 	•	 	 transfer to the purchase contract agent 10 Treasury Units, accompanied by a notice stating that the holder of the
Treasury Units has deposited one share of convertible preferred stock with the collateral agent, and requesting that the purchase contract agent instruct the collateral agent in writing to release the related Treasury security.

 Promptly following receipt of written instructions from the purchase contract agent and receipt of the share of convertible preferred
stock, the collateral agent will release the related Treasury security from the pledge and promptly instruct the securities intermediary to transfer such Treasury security to the purchase contract agent on behalf of the holder, free and clear of our
security interest. The purchase contract agent then will: 
  

	 	•	 	 cancel the 10 Treasury Units; 

 

	 	•	 	 transfer the related Treasury security to the holder; and 

 

	 	•	 	 deliver 10 Corporate Units to the holder. 

The share of convertible preferred stock will be substituted for the Treasury security and will be pledged to us through the collateral agent to secure the
holder’s obligation to purchase shares of our common stock under the related purchase contracts. The Treasury security thereafter will trade and be transferable separately from the Corporate Units. 

Creating Cash Settled Units from Corporate Units 
 Each
holder of 10 Corporate Units may create, only during the period after the date we give notice of the final remarketing period and prior to 5:00 p.m., New York City time, on the second business day immediately preceding the first day of the final
remarketing period, 2019 Series A Cash Settled Units (“Cash Settled Units”) by substituting for a share of convertible preferred stock that is a component of the Corporate Units $1,000 in cash. This substitution

 
would create 10 Cash Settled Units, and the related share of convertible preferred stock would be released to the holder and would be separately tradable from the Cash Settled Units. Because the
convertible preferred stock has a liquidation preference of $1,000 per share, holders of Corporate Units may make this substitution only in integral multiples of 10 Corporate Units. Holders of Cash Settled Units do not have the right to recreate
Corporate Units or create Treasury Units. 
 Each Cash Settled Unit will consist of: 

 

	 	(1)	 a purchase contract under which: 

 

	 	•	 	 the holder agrees to purchase from us on the purchase contract settlement date, unless the purchase contract
terminates prior to that date as described under “Description of the Purchase Contracts— Termination” or is settled early as described under “— Early Settlement Upon a Fundamental Change” below, for $100, a number of
shares of our common stock equal to the applicable settlement rate, plus, in the case of an early settlement upon a fundamental change, an additional make-whole amount of shares; and 

 

	 	•	 	 we will pay to the holder the final quarterly contract adjustment payment due on the purchase contract settlement
date (including any accrued and unpaid deferred contract adjustment payments and compounded contract adjustment payments thereon), payable in cash, shares of our common stock or a combination thereof, at our election; and 

 

	 	(2)	 $100 in cash. 

To create 10 Cash Settled Units, a holder is required to: 
  

	 	•	 	 deposit with the collateral agent $1,000 in cash; and 

 

	 	•	 	 transfer to the purchase contract agent 10 Corporate Units, accompanied by a notice stating that the holder of
the Corporate Units has deposited $1,000 in cash with the collateral agent, and requesting that the purchase contract agent instruct the collateral agent in writing to release the related share of convertible preferred stock. 

Promptly following receipt of written instructions from the purchase contract agent and receipt of cash, the collateral agent will release the related share
of convertible preferred stock from the pledge and deliver it to the transfer agent on behalf of the holder, free and clear of our security interest. The purchase contract agent or transfer agent, as applicable, then will: 

 

	 	•	 	 cancel the 10 Corporate Units; 

 

	 	•	 	 transfer the related share of convertible preferred stock to the holder; and 

 

	 	•	 	 deliver 10 Cash Settled Units to the holder. 

The cash will be substituted for the share of convertible preferred stock and will be pledged to us through the collateral agent to secure the holder’s
obligation to purchase shares of our common stock under the related purchase contract. Cash held as a component of the Cash Settled Unit will be held in a non-interest bearing account as set forth in
the purchase contract and pledge agreement. The share of convertible preferred stock thereafter will trade separately from the Cash Settled Units. 

Holders who create Cash Settled Units, as discussed below, will be responsible for any taxes, governmental charges or other fees or expenses (including
reasonable fees and expenses of the collateral agent and its counsel) payable in connection with substitutions of collateral. See “Certain Provisions of the Purchase Contract and Pledge Agreement—Miscellaneous.” 

Current Payments 
 Holders of Corporate Units and Treasury
Units will receive quarterly contract adjustment payments payable by us at the rate of 5.50% per year on the stated amount of $100 per Equity Unit until the earliest of the purchase contract settlement date, the fundamental change early settlement
date (in the case of a fundamental change where the holder has elected to settle its purchase contracts early in connection with such fundamental change as described in “Description of the Purchase Contracts—Early Settlement Upon a
Fundamental Change”) and the most recent quarterly payment date on or before an early settlement as described in “Description of the Purchase Contracts—Early 

 
Settlement.” Holders of Cash Settled Units will receive the final quarterly contract adjustment payment payable by us on the final contract adjustment payment date. In addition, holders of
Corporate Units will receive, when, as and if declared by our board of directors, quarterly cash distributions consisting of dividends on the convertible preferred stock attributable to such Corporate Units (and distributions on the applicable
ownership interest in the Treasury portfolio if the convertible preferred stock has been replaced by the Treasury portfolio), equivalent to a rate of 1.75% per annum on the liquidation preference of the convertible preferred stock. Any contract
adjustment payments and distributions in respect of dividends on the convertible preferred stock may be paid in cash, shares of our common stock or a combination thereof, at our election, as described herein. There will be no distributions in
respect of the Treasury securities that are a component of the Treasury Units or the cash that is a component of the Cash Settled Units, but to the extent that such holders of Treasury Units or Cash Settled Units, as the case may be, continue to
hold the shares of convertible preferred stock that were released to them when such Treasury Units or Cash Settled Units were created, such holders will continue to receive, when, as and if declared by our board of directors, quarterly dividend
payments on their separate shares of convertible preferred stock for as long as they continue to hold such shares. 
 We will make all contract adjustment
payments quarterly in arrears on March 1, June 1, September 1 and December 1 of each year (except where such date is not a business day, in which case contract adjustment payments will be payable as of the next subsequent
business day, without adjustment). 
 We have the right to defer payment of quarterly contract adjustment payments as described under “Description of
the Purchase Contracts—Contract Adjustment Payments.” We are not obligated to declare or pay dividends on the convertible preferred stock, as described under “Description of the Convertible Preferred Stock—Dividends,”
except that we will pay all accumulated and unpaid dividends on the convertible preferred stock (whether or not declared) on the June 1, 2022 dividend payment date, unless such payment is not permitted under Virginia law (a “dividend
deficiency event”). 
 Listing 
 The Corporate
Units are listed on the New York Stock Exchange under the symbol “DCUE.” Unless and until substitution has been made as described above, none of the convertible preferred stock component of a Corporate Unit, the Treasury security component
of a Treasury Unit nor the cash component of a Cash Settled Unit will trade separately from Corporate Units, Treasury Units or Cash Settled Units. The convertible preferred stock component will trade as a unit with the purchase contract component of
the Corporate Units, the Treasury security component will trade as a unit with the purchase contract component of the Treasury Units and the cash component will trade as a unit with the purchase contract component of the Cash Settled Units. In
addition, if Treasury Units, Cash Settled Units or shares of convertible preferred stock are separately traded to a sufficient extent that the applicable exchange listing requirements are met, we may, but have no obligation to, cause the Treasury
Units, Cash Settled Units or convertible preferred stock to be listed on the exchange on which the Corporate Units are then listed, including, if applicable, the New York Stock Exchange. 

Voting and Certain Other Rights 
 Holders of purchase
contracts forming part of the Corporate Units, Treasury Units, or Cash Settled Units, in their capacities as such holders, have no voting or other rights in respect of our common stock. Holders of shares of convertible preferred stock, whether or
not part of a Corporate Unit, have only the limited voting rights described in “Description of the Convertible Preferred Stock—Limited Voting Rights.” 

Description of the Purchase Contracts 

Purchase of Common Stock 
 Each purchase contract that is
a part of a Corporate Unit, a Treasury Unit or a Cash Settled Unit obligates its holder to purchase, and us to sell, on the purchase contract settlement date (unless the purchase contract terminates prior to that date as described under
“—Termination” or is settled early at the holder’s option as described under “—Early Settlement” or “—Early Settlement Upon a Fundamental Change”), for $100 in cash, a number of shares of our common
stock equal to the settlement rate (together with cash, if applicable, in lieu of any fractional shares of common stock in the manner described below). The number of shares of our common stock issuable upon settlement of each purchase contract on
the purchase contract settlement date (which we call the “settlement rate”) will be rounded to the nearest ten-thousandth of a share and determined as follows, subject to adjustment as
described under “—Anti-dilution Adjustments” below: 
  

	 	(1)	 If the applicable market value of our common stock is less than or equal to $73.91, which we refer to as the
“reference price,” the settlement rate will be 1.3529 shares of our common stock (which we refer to as the “maximum settlement rate”). 

 Accordingly, if the market price for our common stock decreases from the date of this
prospectus supplement and during the market value averaging period (described below), the aggregate market value of the shares of common stock issued upon settlement of each purchase contract will be less than the stated amount of $100, assuming
that the market price on the purchase contract settlement date is the same as the applicable market value of the common stock. 
  

	 	(2)	 If the applicable market value of our common stock is greater than the reference price, the settlement rate
will be a number of shares of our common stock equal to $100 divided by that applicable market value. 

Accordingly, if the market price for the common stock increases from the date of this prospectus supplement and during the market value
averaging period, the aggregate market value of the shares of common stock issued upon settlement of each purchase contract will be equal to the stated amount of $100, assuming that the market price of the common stock on the purchase contract
settlement date is the same as the applicable market value of the common stock. 
 The initial reference price noted above equals the closing price of our
common stock on the New York Stock Exchange on the date of the pricing of our offering of the Equity Units. 
 If you elect to settle your purchase contract
early in the manner described under “—Early Settlement,” the number of shares of our common stock issuable upon settlement of such purchase contract will be equal to 85% of the settlement rate determined in the manner set forth above
but over a 20 consecutive trading day period beginning on the trading day immediately following the day you exercise your early settlement right, which we refer to as the “early settlement averaging period.” If you elect to settle your
purchase contract early upon a fundamental change, the number of shares of our common stock issuable upon settlement will be determined as described under “—Early Settlement Upon a Fundamental Change.” 

The “applicable market value” of our common stock means the average of the daily VWAPs of our common stock during the market value averaging period.

 The “market value averaging period” means the 20 consecutive trading day period beginning on, and including, the 21st scheduled trading day
immediately preceding the purchase contract settlement date. 
 The “daily VWAP” of our common stock means, for each relevant trading day, the per
share volume weighted average price as displayed under the heading Bloomberg VWAP on Bloomberg page “D <EQUITY> AQR” (or its equivalent successor if such page is not available) in respect of the period from the scheduled open of
trading on the relevant trading day until the scheduled close of trading on the relevant trading day (or if such VWAP is unavailable, the market price of one share of our common stock on such trading day determined, using a volume-weighted average
method, by a nationally recognized independent investment banking firm retained for this purpose by us). 
 A “trading day” means (a) a day
(i) on which the New York Stock Exchange, or, if our common stock is not then listed on the New York Stock Exchange, the principal exchange or quotation system on which our common stock is listed or admitted for trading, is scheduled to be open
for business and (ii) on which there has not occurred or does not exist a market disruption event, or (b) if our common stock is not so listed or admitted for trading, a “trading day” means a business day. 

A “market disruption event” means (i) a failure by the primary U.S. national or regional securities exchange or market on which our common
stock is listed or admitted for trading to open for trading during its regular trading session or (ii) the occurrence or existence prior to 1:00 p.m., New York City time, on any scheduled trading day for our common stock for more than one
half-hour period in the aggregate during regular trading hours of any suspension or limitation imposed on trading (by reason of movements in price exceeding limits permitted by the relevant stock exchange or otherwise) in our common stock or in any
options contracts or futures contracts relating to our common stock. 

 If a market disruption event occurs on any scheduled trading day during the market value averaging period or
any early settlement averaging period, we will notify investors on the calendar day on which such event occurs. 
 If 20 trading days for our common stock
have not occurred during the period from, and including, the first day of the market value averaging period to, and including, the second scheduled trading day immediately prior to the purchase contract settlement date, all remaining trading days in
the market value averaging period will be deemed to occur on that second scheduled trading day immediately prior to the purchase contract settlement date, and the daily VWAP of our common stock for each of those remaining trading days will be the
daily VWAP of our common stock on that second scheduled trading day or, if such day is not a trading day, the closing price as of such day. 
 We will not
issue any fractional shares of our common stock upon settlement of a purchase contract. Instead of a fractional share, the holder will receive an amount of cash equal to the percentage of a whole share represented by such fractional
share multiplied by the closing price of our common stock on the trading day immediately preceding the purchase contract settlement date (or the trading day immediately preceding the relevant date for delivery of shares of our
common stock, in the case of early settlement). If, however, a holder surrenders for settlement more than one purchase contract on the same date, then the number of shares of our common stock issuable pursuant to such purchase contracts will be
computed based upon the aggregate number of purchase contracts surrendered on such date or, if the Equity Units are held in global book-entry form, based on such other aggregate number of purchase contracts being surrendered by the holder on the
same date as DTC may otherwise request. 
 The “closing price” per share of our common stock means, on any date of determination, the closing sale
price (or if no closing sale price is reported, the average of the bid and ask prices or, if more than one in either case, the average of the average bid and the average ask prices) on that date as reported in composite transactions for the
principal U.S. national or regional securities exchange on which our common stock is traded. If our common stock is not listed for trading on a U.S. national or regional securities exchange on the relevant date, the “closing price”
will be the last quoted bid price for our common stock in the over-the-counter market on the relevant date as reported by OTC Markets Group Inc. or a similar
organization. If our common stock is not so quoted, the “closing price” will be the average of the mid-point of the last bid and ask prices for our common stock on the relevant date from
each of at least three nationally recognized independent investment banking firms selected by us for this purpose. 
 Unless: 

 

	 	•	 	 a holder has settled the related purchase contracts early by delivery of cash to the purchase contract agent in
the manner described under “—Early Settlement” or “—Early Settlement Upon a Fundamental Change”; or 

  

	 	•	 	 an event described under “—Termination” has occurred, 

then, on the purchase contract settlement date, 
  

	 	•	 	 in the case of Corporate Units where there has been a successful remarketing, the portion of the proceeds from
the final remarketing or the maturity of the Treasury portfolio from an earlier optional remarketing, as applicable, equal to $1,000 multiplied by the number of shares of the convertible preferred stock underlying the Corporate
Units that were remarketed will automatically be applied to satisfy in full the holder’s obligations to purchase our common stock under the related purchase contracts and any excess proceeds will be delivered to the purchase contract agent for
the benefit of the holders whose shares of convertible preferred stock were remarketed; 

  

	 	•	 	 in the case of Corporate Units where there has not been a successful remarketing (i) except in the case of a
dividend deficiency event, on June 1, 2022, we will pay each holder all accumulated and unpaid dividends (whether or not declared) on the convertible preferred stock to, but excluding, the June 1, 2022 dividend payment date as described
under “—Final Remarketing” and (ii) immediately following such payment, each holder will be deemed to have automatically delivered to us on the purchase contract settlement date the ownership interests in the shares of
convertible preferred stock that are a part of such Corporate Units (unless such holder shall have elected to settle the related purchase contracts in cash as described under “—Final Remarketing”) to satisfy in full the holder’s
obligations to purchase our common stock under the related purchase contracts; 

	 	•	 	 in the case of Treasury Units, the cash proceeds of the related Treasury securities, when paid at maturity, will
automatically be applied to satisfy in full the holder’s obligation to purchase our common stock under the related purchase contracts and any excess proceeds will be delivered to the purchase contract agent for the benefit of the holders of the
Treasury Units; and 

  

	 	•	 	 in the case of Cash Settled Units, the cash component of such units will automatically be applied to satisfy in
full the holder’s obligation to purchase our common stock under the related purchase contracts. 

 Our common stock will then be
issued and delivered to the holder or the holder’s designee, promptly following presentation and surrender of the certificate evidencing the Corporate Units, the Treasury Units or the Cash Settled Units, if in certificated form, and payment by
the holder of any transfer or similar taxes payable in connection with the issuance of our common stock to any person other than the holder. 
 Prior to the
settlement of a purchase contract, the shares of our common stock underlying each purchase contract will not be outstanding, and the holder of a purchase contract will not have any voting rights, rights to dividends or other distributions or other
rights of a holder of our common stock by virtue of holding such purchase contract. 
 By purchasing a Corporate Unit, a Treasury Unit or a Cash Settled
Unit, a holder is deemed to have, among other things: 
  

	 	•	 	 irrevocably appointed the purchase contract agent as its attorney-in-fact to enter into and perform the purchase contract and the related purchase contract and pledge agreement in the name of and on behalf of such holder; and 

 

	 	•	 	 agreed to be bound by the terms and provisions of the Corporate Units, Treasury Units and Cash Settled Units and
perform its obligations under the related purchase contract and the purchase contract and pledge agreement. 

 In addition, each
beneficial owner of an Equity Unit, by acceptance of the beneficial interest therein, is deemed to have agreed to treat itself as the owner of the related convertible preferred stock, applicable interest in the Treasury portfolio, Treasury
securities or cash, as the case may be. 
 Remarketing 

We will enter into a remarketing agreement with a nationally recognized investment banking firm, as remarketing agent. Pursuant to the remarketing agreement,
remarketing of the convertible preferred stock underlying the Corporate Units and any separate shares of convertible preferred stock whose holders have elected to participate in the remarketing will be attempted as described below. We refer to each
of an “optional remarketing” and the “final remarketing” (each as defined below) as a “remarketing.” No remarketing will occur if a termination event has occurred or, in the case of an optional remarketing, certain
other events have occurred as described below. 
 As described under “Description of the Convertible Preferred Stock—Remarketing,” in
connection with a successful remarketing, (i) the dividend rate on the convertible preferred stock may be increased as described below, (ii) the conversion rate of the convertible preferred stock may be increased as described below and
(iii) dividends will continue to be payable quarterly in arrears, when, as and if declared by our board of directors, commencing on the March 1, June 1, September 1 or December 1 immediately following the remarketing
settlement date. 
 During any blackout period you do not have the right to: 
  

	 	•	 	 settle a purchase contract early; 

 

	 	•	 	 create Treasury Units; 

 

	 	•	 	 create Cash Settled Units; or 

 

	 	•	 	 recreate Corporate Units from Treasury Units. 

We will use commercially reasonable efforts to ensure that a registration statement with regard to the full amount of the convertible preferred stock to be
remarketed will be effective in a form that may be used by the remarketing agent in connection with the remarketing process (unless such registration statement is not required under the applicable laws and regulations that are in effect at that time
or unless we conduct any remarketing in accordance with an exemption under the securities laws). 

 Optional Remarketing 

Unless (i) a termination event has occurred, (ii) there are any accumulated and unpaid dividends on the convertible preferred stock in respect of
prior dividend periods or (iii) we have not declared a dividend payable on the March 1, 2022 dividend payment date, we may elect, at our option, to remarket the convertible preferred stock during a period (which we call the “optional
remarketing window”) beginning on and including February 25, 2022 and ending on and including May 13, 2022. Any remarketing in the optional remarketing window will occur during a fifteen-business day remarketing period (which we
call an “optional remarketing period”) consisting of fifteen sequential possible remarketing dates selected by us and will include shares of convertible preferred stock underlying Corporate Units and other shares of convertible preferred
stock of holders that have elected to include those shares in the remarketing as described under “Description of the Convertible Preferred Stock—Remarketing of Shares That Are Not Included in Corporate Units.” We may attempt
remarketings during multiple optional remarketing periods in the optional remarketing window so long as we give to the depositary 15 calendar days’ notice prior to the first day of any optional remarketing period as described below. We
refer to a remarketing that occurs during the optional remarketing window as an “optional remarketing” and the date we price the convertible preferred stock offered in an optional remarketing as the “optional remarketing date.”

 If we elect to conduct an optional remarketing, the remarketing agent will use its reasonable best efforts to obtain a price (i) for shares of
convertible preferred stock that are components of Corporate Units, that results in proceeds of at least 100% of the Treasury portfolio purchase price described below and (ii) for shares of convertible preferred stock that are not part of
Corporate Units, at least equal to the separate convertible preferred stock purchase price (as defined in “Description of the Convertible Preferred Stock—Remarketing of Shares That Are Not Included in Corporate Units”). To obtain that
price, we may increase the dividend rate on the convertible preferred stock, as described under “Description of the Convertible Preferred Stock—Increased Dividend Rate and Increased Conversion Rate.” In addition, if, on the date of
any successful remarketing, the closing price of our common stock on such date is less than the reference price, the conversion rate for the convertible preferred stock will increase to an amount equal to $1,000, divided by 120% of
the closing price of our common stock on the date of such remarketing (rounded to the nearest ten-thousandth share). If, however, on the date of any successful remarketing, the closing price of our
common stock on such date is greater than or equal to the reference price, we will not change the conversion rate for the convertible preferred stock. We will not decrease the dividend rate or the conversion rate in connection with a successful
remarketing. 
 Notwithstanding the foregoing, in no event will the increased conversion rate for the convertible preferred stock exceed 45.1000 shares of
common stock per share of convertible preferred stock (which is approximately equal to four times the initial conversion rate for the convertible preferred stock), subject to adjustment in the same manner as the conversion rate as set forth under
“Description of the Convertible Preferred Stock—Conversion Rate Adjustments.” 
 We will request that the depositary notify its participants
holding Corporate Units, Treasury Units, and separate shares of convertible preferred stock of our election to conduct an optional remarketing no later than 15 calendar days prior to the date we begin the optional remarketing. 

Following a successful optional remarketing of the convertible preferred stock, the remarketing agent will purchase the Treasury portfolio at the Treasury
portfolio purchase price (as defined below), and deduct such price from the proceeds of the optional remarketing. Any remaining proceeds will be promptly remitted after the optional remarketing settlement date by the remarketing agent for
the benefit of the holders whose shares of convertible preferred stock were remarketed. 
 If we elect to conduct an optional remarketing and such
remarketing is successful: 
  

	 	•	 	 settlement of the remarketed convertible preferred stock will occur on the second business day following the
optional remarketing date, or such other date we and the remarketing agent agree to (we refer to such settlement date as the “optional remarketing settlement date”); 

 

	 	•	 	 the dividend rate and/or conversion rate of all outstanding shares of convertible preferred stock (whether or not
the holders of such shares elected to participate in the remarketing) will be increased, if applicable, on the optional remarketing settlement date; 

	 	•	 	 any terms of the remarketed convertible preferred stock modified by us in accordance with the preferred stock
articles of amendment will become effective on the optional remarketing settlement date, if applicable; 

  

	 	•	 	 dividends will continue to be payable on the convertible preferred stock quarterly, when, as and if declared by
our board of directors; 

  

	 	•	 	 your Corporate Units will consist of a purchase contract and the applicable ownership interest in the Treasury
portfolio, as described above; and 

  

	 	•	 	 you may no longer create Treasury Units or Cash Settled Units or recreate Corporate Units from Treasury Units.

 If we do not elect to conduct an optional remarketing in the optional remarketing window, or no optional remarketing succeeds for any
reason, the shares of convertible preferred stock will continue to be components of the Corporate Units or will continue to be held separately and the remarketing agent will use its reasonable best efforts to remarket the convertible preferred stock
during the final remarketing period as described below. 
 For the purposes of a successful optional remarketing, “Treasury portfolio purchase
price” means the lowest aggregate ask-side price quoted by a primary U.S. government securities dealer to the quotation agent selected by us between 9:00 a.m. and 4:00 p.m., New York City time,
on the optional remarketing date for the purchase of the Treasury portfolio for settlement on the optional remarketing settlement date. 
 Following a
successful optional remarketing, the remarketing agent will purchase, at the Treasury portfolio purchase price, the Treasury portfolio. If U.S. Treasury securities (or principal or interest strips thereof) that are to be included in the Treasury
portfolio in connection with a successful optional remarketing have a yield that is less than zero, the Treasury portfolio will consist of an amount in cash equal to the aggregate principal amount at maturity of the U.S. Treasury securities
described in the description of the Treasury portfolio under “Description of the Equity Units.” If the provisions set forth in this paragraph apply, references in this prospectus supplement to a “Treasury security” and “U.S.
Treasury securities (or principal or interest strips thereof)” in connection with the Treasury portfolio will, thereafter, be deemed to be references to such amount in cash. Neither we, the purchase contract agent, the collateral agent nor
anyone else will be required to invest that cash. 
 The applicable ownership interests in the Treasury portfolio will be substituted for the shares of
convertible preferred stock that are components of the Corporate Units and, solely with respect to the Treasury securities described in clause (1) of the definition of applicable ownership interest, such applicable ownership interests will be
pledged to us through the collateral agent to secure the Corporate Unit holders’ obligations under the purchase contracts. On the purchase contract settlement date, a portion of the proceeds from the Treasury portfolio equal to
$1,000 multiplied by the number of shares of convertible preferred stock that are components of the Corporate Units at the time of remarketing will automatically be applied to satisfy the Corporate Unit holders’ obligations to
purchase our common stock under the purchase contracts. In addition, proceeds from the Treasury portfolio equal to the dividend payment that would have been attributable to the shares of convertible preferred stock that were components of the
Corporate Units at the time of the remarketing (whether or not declared) will be paid on the purchase contract settlement date, which is the same date as the first originally scheduled dividend payment date after the optional remarketing settlement
date. 
 If we elect to remarket the convertible preferred stock during an optional remarketing period and a successful remarketing has not occurred on or
prior to the last day of the optional remarketing period, we will cause a notice of the failed remarketing of the convertible preferred stock to be published before 9:00 a.m., New York City time, on the business day immediately following
the last date of the optional remarketing period. This notice will be validly published by making a timely release to any appropriate news agency, including, without limitation, Bloomberg Business News and the Dow Jones News Service. We will
similarly cause a notice of a successful remarketing of the convertible preferred stock to be published before 9:00 a.m., New York City time, on the business day immediately following the date of such successful remarketing. 

Final Remarketing 
 Unless (i) a termination event
has occurred or (ii) the Treasury portfolio has replaced the convertible preferred stock as a component of the Corporate Units as a result of a successful optional remarketing, the remarketing agent will remarket the shares of convertible
preferred stock that are components of the Corporate Units and any separate shares of convertible preferred stock whose holders have elected to participate in the remarketing as described under 

 
“Description of the Convertible Preferred Stock—Remarketing of Shares That Are Not Included in Corporate Units,” during each day of the five business day period ending on
May 27, 2022 (the second business day immediately preceding the purchase contract settlement date) until the remarketing is successful. We refer to such period as the “final remarketing period,” the remarketing during this period as
the “final remarketing” and the date we price the convertible preferred stock offered in the final marketing as the “final remarketing date.” 

The remarketing agent will use its reasonable best efforts to obtain, and the remarketing will be considered successful if the remarketing agent is able to
obtain, a price that results in proceeds of at least $1,000 multiplied by the aggregate number of shares of convertible preferred stock being remarketed. To obtain that price, we may increase the dividend rate on the
convertible preferred stock as described under “Description of the Convertible Preferred Stock—Increased Dividend Rate and Increased Conversion Rate.” In addition, if, on the date of any successful remarketing, the closing price of
our common stock on such date is less than the reference price, the conversion rate for the convertible preferred stock will increase to an amount equal to $1,000, divided by 120% of the closing price of our common stock on the date
of such remarketing (rounded to the nearest ten-thousandth share). If, however, on the date of any successful remarketing, the closing price of our common stock on such date is greater than or equal
to the reference price, we will not change the conversion rate for the convertible preferred stock. Notwithstanding the foregoing, in no event will the increased conversion rate for the convertible preferred stock exceed 45.1000 shares of common
stock per share of convertible preferred stock (which is approximately equal to four times the initial conversion rate for the convertible preferred stock), subject to adjustment in the same manner as the conversion rate as set forth under
“Description of the Convertible Preferred Stock—Conversion Rate Adjustments.” We will request that the depositary notify its participants holding Corporate Units, Treasury Units and separate shares of convertible preferred stock
of the remarketing no later than May 5, 2022. In our notice of a final remarketing, we will set forth the dates of the final remarketing period, applicable procedures for holders of separate shares of convertible preferred stock to
participate in the final remarketing, the applicable procedures for holders of Corporate Units to create Treasury Units or Cash Settled Units, the applicable procedures for holders of Corporate Units to settle their purchase contracts early and
any other applicable procedures, including the procedures that must be followed by a holder of an ownership interest in a share of convertible preferred stock that is a part of a Corporate Unit in the case of a failed final remarketing if such
holder wishes not to have its ownership interests in shares of convertible preferred stock automatically delivered to us as described in this prospectus supplement in satisfaction of its obligation under the related purchase contracts. 

We have the right to postpone the final remarketing in our absolute discretion on any day prior to the last business day of the final remarketing period. 

If the final remarketing is successful: 
  

	 	•	 	 settlement of the remarketed convertible preferred stock will occur on the purchase contract settlement date;

  

	 	•	 	 except in the case of a dividend deficiency event, we will pay all accumulated and unpaid dividends (including
compounded dividends thereon), whether or not declared, on the purchase contract settlement date to the holders of the convertible preferred stock as of the close of business on the immediately preceding record date; 

 

	 	•	 	 the dividend rate and/or conversion rate of all outstanding shares of convertible preferred stock (whether or not
the holder of such shares elected to participate in the remarketing) will be increased, if applicable, effective on the purchase contract settlement date; 

 

	 	•	 	 any terms of the remarketed convertible preferred stock modified by us in accordance with the preferred stock
articles of amendment will become effective on the final remarketing settlement date, if applicable; 

  

	 	•	 	 dividends will continue to be payable on the convertible preferred stock quarterly, when, as and if declared by
our board of directors; 

  

	 	•	 	 a portion of the proceeds from the remarketing equal to $1,000 multiplied by the number of
shares of convertible preferred stock underlying Corporate Units that were remarketed will automatically be applied to satisfy in full the Corporate Unit holders’ obligations to purchase our common stock under the related purchase contracts on
the purchase contract settlement date; 

  

	 	•	 	 a portion of the proceeds from the remarketing equal to $1,000 multiplied by the number of
separate shares of convertible preferred stock whose holders have elected to participate in the remarketing will be remitted by the remarketing agent for the benefit of such holders on the purchase contract settlement date; and

	 	•	 	 any remaining proceeds will be promptly remitted after the purchase contract settlement date by the remarketing
agent for the benefit of the holders whose shares of convertible preferred stock were remarketed. 

 If (1) despite using its
reasonable best efforts, the remarketing agent cannot remarket the related convertible preferred stock on or prior to the last day of the final remarketing period, at a price equal to or greater than $1,000 multiplied by the
aggregate number of shares of convertible preferred stock being remarketed or (2) the final remarketing has not occurred on or prior to the last day of the final remarketing period because a condition precedent to the remarketing has not been
fulfilled, in each case resulting in a failed remarketing, the ownership interests in the shares of convertible preferred stock held as a part of Corporate Units will be automatically delivered to us, on the purchase contract settlement date, in
full satisfaction of the Corporate Unit holder’s obligation to purchase our common stock under the related purchase contract, unless the holder has elected otherwise, as set forth under “Description of the Convertible Preferred
Stock—Automatic Settlement Upon Failed Final Remarketing.” Notwithstanding the foregoing, except in the case of a dividend deficiency event, all accumulated and unpaid dividends (including compounded dividends thereon) will be paid on the
purchase contract settlement date to the holders of the shares of convertible preferred stock as of the record date immediately preceding the purchase contract settlement date, whether or not declared. If a dividend deficiency event occurs,
following the final remarketing (whether successful or failed), we shall have no obligation to pay the then accumulated but unpaid dividends on the convertible preferred stock on the purchase contract settlement date to the holders of the shares of
convertible preferred stock as of the record date immediately preceding the purchase contract settlement date. However, the right to receive such accumulated but unpaid dividends (including compounded dividends thereon) shall continue to exist (and
shall continue to compound) with respect to such convertible preferred stock notwithstanding such remarketing, and such dividends shall be payable to the holders of such convertible preferred stock as of the record date for the dividend payment date
on which such dividends are subsequently declared and paid (if ever). 
 If a successful remarketing has not occurred on or prior to the last day of the
final remarketing period, we will cause a notice of the failed remarketing of the convertible preferred stock to be published before 9:00 a.m., New York City time, on the business day immediately following the last date of the final remarketing
period. This notice will be validly published by making a timely release to any appropriate news agency, including, without limitation, Bloomberg Business News and the Dow Jones News Service. 

Early Settlement 
 Subject to the conditions described
below, a holder of Corporate Units or Treasury Units may elect to settle the related purchase contracts at any time prior to the close of business on the scheduled trading day immediately preceding the first day of the market value averaging period,
other than during a blackout period. In the case of Corporate Units and Treasury Units, such early settlement may only be made in integral multiples of 10 Corporate Units or 10 Treasury Units, as applicable. If the Treasury portfolio has
replaced the shares of convertible preferred stock that are components of the Corporate Units, holders of the Corporate Units may settle early only in integral multiples of such number of Corporate Units as may be determined by the remarketing agent
upon a successful optional remarketing of convertible preferred stock. 
 In order to settle purchase contracts early, a holder of Equity Units must deliver
to the purchase contract agent (1) a completed “Election to Settle Early” form, along with the Corporate Unit or Treasury Unit certificate, if they are in certificated form and (2) a cash payment in immediately available funds in
an amount equal to: 
  

	 	•	 	 $100 times the number of purchase contracts being settled; plus 

 

	 	•	 	 if the “early settlement date” (as defined below) for any purchase contract occurs during the period
from the close of business on any contract adjustment payment record date to the opening of business on the related payment date, an amount equal to the contract adjustment payments payable on the payment date with respect to the purchase contracts
being settled, unless we have elected to defer the contract adjustment payments payable on such date. 

 So long as you hold Equity Units
as a beneficial interest in a global security certificate deposited with the depositary, procedures for early settlement will also be governed by standing arrangements between the depositary and the purchase contract agent. 

 The early settlement right is also subject to the condition that, if we determine that it is required under
U.S. federal securities laws, we have a registration statement under the Securities Act in effect and an available prospectus covering the shares of common stock and other securities, if any, deliverable upon settlement of a purchase contract.
We have agreed that, if required under U.S. federal securities laws, we will use our commercially reasonable efforts to (1) have a registration statement in effect covering those shares of common stock and other securities, if any, to be
delivered in respect of the purchase contracts being settled and (2) provide a prospectus in connection therewith, in each case in a form that may be used in connection with the early settlement right (it being understood that if there is a
material business transaction or development that has not yet been publicly disclosed, we will not be required to provide such a prospectus, and the early settlement right will not be available, until we have publicly disclosed such transaction or
development, provided that we will use our commercially reasonable efforts to make such disclosure as soon as it is commercially reasonable to do so). 

Upon early settlement, except as described below in “—Early Settlement Upon a Fundamental Change,” we will issue, for each purchase contract
being settled, 85% of the number of shares of our common stock that would be deliverable for each purchase contract as described in “—Purchase of Common Stock” above as if the “applicable market value” were the average of
the daily VWAPs of our common stock during the early settlement averaging period. 
 We will cause the related shares of convertible preferred stock or
applicable ownership interests in the Treasury portfolio or Treasury securities, as the case may be, underlying the Equity Units and securing such purchase contract to be released from the pledge under the purchase contract and pledge agreement, and
delivered within two business days following the early settlement date, to the purchase contract agent or stock transfer agent, as applicable, on behalf of the holder, free and clear of our security interest. In addition, we will issue the number of
shares of our common stock to be issued upon settlement of the purchase contract within two business days following the last day of the early settlement averaging period, to the holder through the transfer agent for our common stock. Upon early
settlement, the holder will be entitled to receive any accrued and unpaid contract adjustment payments (including any accrued and unpaid deferred contract adjustment payments and compounded contract adjustment payments thereon) to, but excluding,
the quarterly payment date immediately preceding the early settlement date. The holder’s right to receive future contract adjustment payments will terminate (except for contract adjustment payments payable to the holders of record on the
applicable record date), and no adjustment will be made to or for the holder on account of any amounts accrued in respect of contract adjustment payments since the most recent quarterly payment date. 

If the purchase contract agent receives a completed “Election to Settle Early” form, along with the Corporate Unit or Treasury Unit certificate, if
they are in certificated form, and payment of $100 for each purchase contract being settled prior to 5:00 p.m., New York City time, on any business day and all conditions to early settlement have been satisfied, then that day will be considered the
“early settlement date.” If the purchase contract agent receives the foregoing on or after 5:00 p.m., New York City time, on any business day or at any time on a day that is not a business day, then the next business day will be considered
the “early settlement date.” 
 Early Settlement Upon a Fundamental Change 

If a fundamental change (as defined below) occurs prior to the purchase contract settlement date, then, following the fundamental change, each holder of a
purchase contract, subject to certain conditions described in this prospectus supplement, will have the right to settle the purchase contract early on the fundamental change early settlement date (as defined below) at the settlement rate determined
as if the applicable market value equaled the stock price (as defined below under “—Calculation of Make-Whole Shares”), plus an additional number of shares determined as set forth below (such additional number
referred to as the “make-whole shares”). We refer to this right as the “fundamental change early settlement right.” 
 A
“fundamental change” will be deemed to have occurred if any of the following occurs: 
  

	 	(1)	 a “person” or “group” within the meaning of Section 13(d) of the Exchange Act has
become the direct or indirect “beneficial owner,” as defined in Rule 13d-3 under the Exchange Act, of shares of our common stock representing more than 50% of the voting power of our common
stock; 

  

	 	(2)	 (A) we are involved in a consolidation with or merger into any other person, or any merger of another person
into us, or any other similar transaction or series of related transactions (other than a merger, consolidation or similar transaction that does not result in the conversion or exchange of outstanding shares of our common stock), in each case, in
which 90% or more of the outstanding shares of our common stock are exchanged 

	 	
for or converted into cash, securities or other property, greater than 10% of the value of which consists of cash, securities or other property that is not (or will not be upon or immediately
following the effectiveness of such consolidation, merger or other transaction) common stock listed on the New York Stock Exchange, the NASDAQ Global Select Market or the NASDAQ Global Market (or any of their respective successors) or (B) the
consummation of any sale, lease or other transfer in one transaction or a series of related transactions of all or substantially all of our consolidated assets to any person other than one of our subsidiaries; 

 

	 	(3)	 our common stock ceases to be listed on at least one of the New York Stock Exchange, the NASDAQ Global Select
Market and the NASDAQ Global Market (or any of their respective successors); or 

  

	 	(4)	 our shareholders approve our liquidation, dissolution or termination. 

The fundamental change early settlement right is subject to the condition that at such time, if so required under U.S. federal securities laws, there is in
effect a registration statement and an available prospectus covering shares of our common stock and other securities, if any, to be delivered pursuant to the purchase contracts being settled. We have agreed that, if required under U.S. federal
securities laws, we will use our commercially reasonable efforts to (1) have a registration statement in effect covering our common stock and other securities, if any, to be delivered in respect of the purchase contracts being settled and
(2) provide a prospectus in connection therewith, in each case in a form that may be used in connection with the early settlement upon a fundamental change (it being understood that if there is a material business transaction or development
that has not yet been publicly disclosed, we will not be required to provide such a prospectus, and the fundamental change early settlement right will not be available, until we have publicly disclosed such transaction or
development, provided that we will use our commercially reasonable efforts to make such disclosure as soon as it is commercially reasonable to do so). The fundamental change early settlement date will be postponed by the number
of days during the period on which no such registration statement is effective, except that the fundamental change early settlement date will not be postponed beyond the purchase contract settlement date. If, but for the exception contained in the
immediately preceding sentence, the fundamental change early settlement date would occur on or after the purchase contract settlement date, we will deliver to any holder of purchase contracts on the purchase contract settlement date the
applicable number of make-whole shares in addition to a number of shares equal to the settlement rate, determined as if the applicable market value were equal to the stock price (as defined below under “—Calculation of Make-Whole
Shares”) in such fundamental change. 
 We will provide each holder of Equity Units with a notice of a fundamental change within five business days
after the effective date of the fundamental change. The notice will specify: 
  

	 	(1)	 a date on which the fundamental change early settlement will occur (the “fundamental change early
settlement date,”) which shall be at least 10 business days after the effective date of such fundamental change but, subject to the foregoing, no later than the earlier of (x) 20 business days after the effective date of such fundamental
change and (y) one business day prior to (i) the first day of the commencement of an optional remarketing period, or (ii) if we have not specified an optional remarketing period or the optional remarketing is not successful, the first
day of the commencement of the final remarketing period or, if the final remarketing is not successful, the purchase contract settlement date; 

  

	 	(2)	 the date by which holders must exercise the fundamental change early settlement right; 

 

	 	(3)	 the applicable settlement rate and number of make-whole shares; 

 

	 	(4)	 the amount and kind (per share of common stock) of the cash, securities and other consideration receivable by
the holder upon settlement; and 

  

	 	(5)	 the amount of accrued and unpaid contract adjustment payments (including any deferred contract adjustment
payments and compounded contract adjustment payments thereon), if any, that will be paid upon settlement to holders exercising the fundamental change early settlement right. Notwithstanding the foregoing, if the final remarketing period begins less
than 10 business days following the occurrence of a fundamental change, the notice will specify the purchase contract settlement date as the fundamental change early settlement date. 

To exercise the fundamental change early settlement right, a holder must, no later than the second business day prior to the fundamental change early
settlement date: 
  

	 	•	 	 deliver to the purchase contract agent a completed “Election to Settle Early Following a Fundamental
Change” form; 

	 	•	 	 deliver to the purchase contract agent the certificate evidencing the holder’s Corporate Units or Treasury
Units, if in certificated form; and 

  

	 	•	 	 deliver to the purchase contract agent cash in immediately available funds equal to $100 multiplied
by the number of purchase contracts being settled. 

 So long as you hold Equity Units as a beneficial interest in a global
security certificate deposited with the depositary, procedures for fundamental change early settlement will also be governed by standing arrangements between the depositary and the purchase contract agent. 

If you exercise the fundamental change early settlement right, we will deliver to you on the fundamental change early settlement date for each purchase
contract with respect to which you have elected fundamental change early settlement, a number of shares (or exchange property units, if applicable) equal to the settlement rate described above plus the additional make-whole shares,
together with accrued and unpaid contract adjustment payments to the fundamental change early settlement date; provided that if a fundamental change early settlement date falls after a record date and on or prior to the
corresponding contract adjustment payment date, we will pay the full amount of accrued and unpaid contract adjustment payments, if any, due on such contract adjustment payment date to the holder of record at the close of business on the
corresponding record date. 
 The holder will also receive on the fundamental change early settlement date the shares of convertible preferred stock or the
applicable ownership interest in the Treasury portfolio or Treasury securities underlying the Corporate Units or Treasury Units, as the case may be, with respect to which such holder is effecting a fundamental change early settlement, which, in each
case, shall have been released from the pledge under the purchase contract and pledge agreement and delivered to the purchase contract agent or transfer agent, as applicable, on behalf of the holder, free and clear of our security interest. In the
case of Corporate Units, if such holder has elected to settle the purchase contracts with cash, such holder will also receive on the fundamental change early settlement date the aggregate number of shares of convertible preferred stock underlying
the Corporate Units. If a holder does not elect to exercise the fundamental change early settlement right, its Corporate Units or Treasury Units will remain outstanding and subject to normal settlement on the purchase contract settlement date. 

Holders of Corporate Units and Treasury Units may exercise the fundamental change early settlement right only in integral multiples of 10 Corporate Units or
Treasury Units, as applicable. If the Treasury portfolio has replaced the shares of convertible preferred stock that are components of the Corporate Units, holders of the Corporate Units may exercise the fundamental change early settlement right
only in integral multiples of such number of Corporate Units as may be determined by the remarketing agent upon a successful optional remarketing of convertible preferred stock. 

Calculation of Make-Whole Shares. 
 The number of
make-whole shares per purchase contract applicable to a fundamental change early settlement will be determined by reference to the table below, based on the date on which the fundamental change occurs or becomes effective (the “effective
date”) and the “stock price” in the fundamental change, which will be: 
  

	 	•	 	 in the case of a fundamental change described in clause (2) of the definition of fundamental change above
where the holders of our common stock receive only cash in the fundamental change, the cash amount paid per share of our common stock; and 

  

	 	•	 	 in all other cases, the average of the closing prices of our common stock for the 10 consecutive trading days
immediately prior to but not including the effective date. 

 For purposes of this “Description of the Purchase Contracts”
section, the stock prices set forth in the first row of the table (i.e., the column headers) will be adjusted upon the occurrence of certain events requiring anti-dilution adjustments to the maximum settlement rate in a manner inversely proportional
to the adjustments to the maximum settlement rate. Each of the make-whole share amounts in the table will be subject to adjustment in the same manner and at the same time as the maximum settlement rate as set forth under “—Anti-dilution
Adjustments.” 
  

																																																					
	 	  	Stock Price	 
	 Effective Date
	  	$30.00	 	  	$40.00	 	  	$50.00	 	  	$60.00	 	  	$70.00	 	  	$73.91	 	  	$80.00	 	  	$90.00	 	  	$100.00	 	  	$110.00	 	  	$120.00	 	  	$130.00	 	  	$140.00	 
	 June 14, 2019
	  	 	0.5222	 	  	 	0.3435	 	  	 	0.2292	 	  	 	0.1356	 	  	 	0.0436	 	  	 	0.0000	 	  	 	0.0515	 	  	 	0.0949	 	  	 	0.1142	 	  	 	0.1200	 	  	 	0.1189	 	  	 	0.1145	 	  	 	0.1088	 
	 June 1, 2020
	  	 	0.3518	 	  	 	0.2316	 	  	 	0.1557	 	  	 	0.0899	 	  	 	0.0142	 	  	 	0.0000	 	  	 	0.0273	 	  	 	0.0691	 	  	 	0.0847	 	  	 	0.0875	 	  	 	0.0848	 	  	 	0.0802	 	  	 	0.0753	 
	 June 1, 2021
	  	 	0.1778	 	  	 	0.1170	 	  	 	0.0799	 	  	 	0.0472	 	  	 	0.0000	 	  	 	0.0000	 	  	 	0.0094	 	  	 	0.0425	 	  	 	0.0495	 	  	 	0.0480	 	  	 	0.0447	 	  	 	0.0414	 	  	 	0.0385	 
	 June 1, 2022
	  	 	0.0000	 	  	 	0.0000	 	  	 	0.0000	 	  	 	0.0000	 	  	 	0.0000	 	  	 	0.0000	 	  	 	0.0000	 	  	 	0.0000	 	  	 	0.0000	 	  	 	0.0000	 	  	 	0.0000	 	  	 	0.0000	 	  	 	0.0000	 

 The actual stock price and effective date may not be set forth on the table, in which case: 

 

	 	•	 	 if the actual stock price is between two stock prices on the table or the actual effective date is between two
effective dates on the table, the amount of make-whole shares will be determined by a straight-line interpolation between the make-whole share amounts set forth for the two stock prices and the two effective dates on the table based on a 365-day year, as applicable; 

  

	 	•	 	 if the stock price exceeds $140.00 per share, subject to adjustment in the same manner as the stock prices in the
table above, then the make-whole share amount will be zero; and 

  

	 	•	 	 if the stock price is less than $30.00 per share, subject to adjustment in the same manner as the stock prices in
the table above (the “minimum stock price”), then the make-whole share amount will be determined as if the stock price equaled the minimum stock price, using straight-line interpolation, as described above, if the actual effective date is
between two effective dates on the table. 

 Contract Adjustment Payments 

Contract adjustment payments in respect of Corporate Units, Treasury Units and Cash Settled Units are payable in cash, shares of our common stock or a
combination thereof, at a rate per year of 5.50% of the stated amount of $100 per Equity Unit. Contract adjustment payments payable for any period are computed (1) for any full quarterly period on the basis of
a 360-day year of twelve 30-day months and (2) for any period shorter than a full quarterly period, on the basis of a 30-day month and, for any period less than a month, on the basis of the actual number of days elapsed in a 30-day month. Contract adjustment payments
accrue from the date of original issuance of the Corporate Units to (but excluding) the earliest occurrence of a termination event, the purchase contract settlement date, the fundamental change early settlement date and the most recent quarterly
payment date on or before any early settlement of the related purchase contracts, and are payable quarterly in arrears on March 1, June 1, September 1 and December 1 of each year (we refer to each of these dates as a
“contract adjustment payment date”). 
 Contract adjustment payments are payable to the holders of purchase contracts as they appear on the books
and records of the purchase contract agent at the close of business on the relevant record dates, which are the fifteenth day of the month immediately preceding the month in which the relevant contract adjustment payment date falls (whether or not a
business day) or if the Equity Units are held in global book-entry form, the record date is the business day immediately preceding the applicable contract adjustment payment date. Contract adjustment payments will be payable to such record holders
notwithstanding the occurrence of any early settlement date or fundamental change early settlement date following a record date and on or prior to the open of business on the related payment date, except that holders will be required to pay us, in
connection with any early settlement (other than in connection with a fundamental change), an equivalent payment as described under “—Early Settlement” above. These distributions will be paid through the purchase contract agent, who
will distribute amounts received in respect of the contract adjustment payments for the benefit of the holders of the purchase contracts relating to the Corporate Units, Treasury Units and Cash Settled Units. 

If any date on which contract adjustment payments are to be made is not a business day, then payment of the contract adjustment payments payable on that date
will be made on the next succeeding day that is a business day and no interest or payment will be paid in respect of the delay, if any. 
 Our obligations
with respect to contract adjustment payments are subordinated and junior in right of payment to our existing and future indebtedness. Upon certain events of our bankruptcy, insolvency or reorganization, holders of our Equity Units will have no
claims against us or our estate for any accrued and unpaid (including any deferred) contract adjustment payments. 
 We may, at our option and upon prior
written notice to the holders of the Equity Units and the purchase contract agent, defer the payment of contract adjustment payments on the related purchase contracts forming a part of the Equity Units until the purchase contract settlement
date; provided, however, that in (x) an early settlement upon a fundamental change, we will pay deferred contract adjustment payments (including compounded contract adjustment payments thereon as described below) to, but excluding,
the fundamental change early settlement date and (y) an early settlement other than upon a fundamental change, we will pay deferred contract adjustment payments (including compounded contract adjustment payments thereon as described below) to,
but excluding, the quarterly contract adjustment payment date immediately preceding the early settlement date. 

 Deferred contract adjustment payments will accrue additional contract adjustment payments at the rate of
7.25% per year until paid, compounded quarterly, which is equal to the rate of total distributions on the Corporate Units (compounding on each succeeding payment date), to, but excluding, the date such deferred contract adjustment payments are made.
We refer to these additional contract adjustment payments that accrue on deferred contract adjustment payments as “compounded contract adjustment payments.” We may pay any such deferred contract adjustment payments (including
compounded contract adjustment payments thereon) on any scheduled contract adjustment payment date. If the purchase contracts are terminated (upon the occurrence of certain events of bankruptcy, insolvency or reorganization with respect to us),
the right to receive contract adjustment payments and deferred contract adjustment payments (including compounded contract adjustment payments thereon) will also terminate. 

If we exercise our option to defer the payment of contract adjustment payments, then, until the deferred contract adjustment payments (including compounded
contract adjustment payments thereon) have been paid, we will not (1) declare or pay any dividends on, or make any distributions on, or redeem, purchase or acquire, or make a liquidation payment with respect to, any shares of our capital
stock (including the convertible preferred stock), (2) make any payment of principal of, or interest or premium, if any, on, or repay, repurchase or redeem any of our debt securities that rank on parity with, or junior to, the contract adjustment
payments, or (3) make any guarantee payments under any guarantee by us of securities of any of our subsidiaries if our guarantee ranks on parity with, or junior to, the contract adjustment payments. 

The restrictions listed above do not apply to: 
  

	 	•	 	 purchases, redemptions or other acquisitions of our capital stock in connection with any employment contract,
benefit plan or other similar arrangement with or for the benefit of employees, officers, directors, agents or consultants or a stock purchase or dividend reinvestment plan, or the satisfaction of our obligations pursuant to any contract or security
outstanding on the date that the contract adjustment payment is deferred requiring us to purchase, redeem or acquire our capital stock; 

  

	 	•	 	 any payment, repayment, redemption, purchase, acquisition or declaration of dividends described in clause
(1) above as a result of a reclassification of our capital stock, or the exchange or conversion of all or a portion of one class or series of our capital stock, for another class or series of our capital stock; 

 

	 	•	 	 the purchase of fractional interests in shares of our capital stock pursuant to the conversion or exchange
provisions of our capital stock or the security being converted or exchanged, or in connection with the settlement of stock purchase contracts outstanding on the date that the contract adjustment payment is deferred; 

 

	 	•	 	 dividends or distributions paid or made in our capital stock (or rights to acquire our capital stock), or
repurchases, redemptions or acquisitions of capital stock in connection with the issuance or exchange of capital stock (or of securities convertible into or exchangeable for shares of our capital stock) and distributions in connection with the
settlement of stock purchase contracts outstanding on the date that the contract adjustment payment is deferred; 

  

	 	•	 	 redemptions, exchanges or repurchases of, or with respect to, any rights outstanding under a shareholder rights
plan outstanding on the date that the contract adjustment payment is deferred or the declaration or payment thereunder of a dividend or distribution of or with respect to rights in the future; 

 

	 	•	 	 payments on any trust preferred securities, subordinated debentures, junior subordinated debentures or junior
subordinated notes, or any guarantees of any of the foregoing, in each case, that rank equal in right of payment to the contract adjustment payments, so long as the amount of payments made on account of such securities or guarantees and the purchase
contracts is paid on all such securities and guarantees and the purchase contracts then outstanding on a pro rata basis in proportion to the full payment to which each series of such securities, guarantees or purchase contracts is then entitled if
paid in full; provided that, for the avoidance of doubt, we will not be permitted under the purchase contract and pledge agreement to make contract adjustment payments in part; or 

	 	•	 	 any payment of deferred interest or principal on, or repayment, redemption or repurchase of, parity or junior
securities that, if not made, would cause us to breach the terms of the instrument governing such parity or junior securities. 

Method of Payment of Contract Adjustment Payments 

Subject to the limitations described below, we may pay any contract adjustment payment (or any portion of any contract adjustment payment) on the Equity Units
(whether or not for a current quarterly period or any prior quarterly period), determined in our sole discretion: 
  

	 	•	 	 in cash; 

  

	 	•	 	 by delivery of shares of our common stock; or 

 

	 	•	 	 through any combination of cash and shares of our common stock. 

We will make each contract adjustment payment in cash, except to the extent we elect to make all or any portion of such payment in shares of our common stock.
To the extent we do not elect to defer such payment, we will give the holders of the Equity Units notice of any such election and the portion of such payment that will be made in cash and the portion that will be made in common stock no later than
eight scheduled trading days prior to the payment date for such contract adjustment payment. 
 If we elect to make any such contract adjustment payment, or
any portion thereof, in shares of our common stock, such shares shall be valued for such purpose at the average of the daily VWAPs per share of our common stock over the five consecutive trading day period ending on the second trading day
immediately preceding the applicable payment date (the “five-day average price”), multiplied by 97%. 

No fractional shares of common stock will be delivered to the holders of the Equity Units in respect of contract adjustment payments. We will instead pay a
cash adjustment to each holder that would otherwise be entitled to a fraction of a share of common stock based on (i) the five-day average price and (ii) the aggregate number of Equity
Units held by such holder (or, if the Equity Units are held in global book-entry form, based on the applicable procedures of the depositary for determining such number of Equity Units). 

To the extent a shelf registration statement is required in our reasonable judgment in connection with the issuance of or for resales of common stock issued
as a contract adjustment payment, including contract adjustment payments paid in connection with a fundamental change early settlement, we will, to the extent such a registration statement is not currently filed and effective, use our
reasonable best efforts to file and maintain the effectiveness of such a shelf registration statement until the earlier of such time as all such shares of common stock have been resold thereunder and such time as all such shares are freely tradable
under Rule 144 by non-affiliates of ours without registration. To the extent applicable, we will also use our reasonable best efforts to have the shares of common stock qualified or registered
under applicable state securities laws, if required, and approved for listing on the New York Stock Exchange (or if our common stock is not listed on the New York Stock Exchange, on the principal other U.S. national or regional securities exchange
on which our common stock is then listed). 
 Anti-dilution Adjustments 

The maximum settlement rate will be subject to the following adjustments: 

(1) If we issue common stock as a dividend or distribution on our common stock to all or substantially all holders of our common stock, or if
we effect a share split or share combination, the maximum settlement rate will be adjusted based on the following formula: 
 SR1 = SR0 x (OS1 /
OS0) 
 where, 

 

					
	SR0	  	=	  	the maximum settlement rate in effect immediately prior to the close of business on the record date for such dividend or distribution or immediately prior to the open of business on the effective date for such share split or share
combination, as the case may be;
			
	SR1	  	=	  	the maximum settlement rate in effect immediately after the close of business on such record date or immediately after the open of business on such effective date, as the case may
be;

					
	OS0	  	=	  	the number of shares of our common stock outstanding immediately prior to the close of business on such record date or immediately prior to the open of business on such effective date, as the case may be, in each case, prior to
giving effect to such event; and
			
	OS1	  	=	  	the number of shares of our common stock that would be outstanding immediately after, and solely as a result of, such event.

 Any adjustment made pursuant to this paragraph (1) shall become effective as of the close of business on the record
date for such dividend or other distribution or as of the open of business on the effective date for such share split or share combination becomes effective, as applicable. If any dividend or distribution in this paragraph (1) is declared but
not so paid or made, the new maximum settlement rate shall be readjusted, on the date that our board of directors determines not to pay or make such dividend or distribution, to the maximum settlement rate that would then be in effect if such
dividend or distribution had not been declared. 
 (2) If we distribute to all holders of our common stock any rights, options or warrants
entitling them for a period of not more than 45 calendar days after the date of distribution thereof to subscribe for or purchase our common stock, in any case at an exercise price per share of our common stock less than the average of the closing
prices of our common stock for the 10 consecutive trading days ending on, and including, the trading day immediately preceding the date of the announcement of such distribution, the maximum settlement rate will be increased based on the following
formula: 
 SR1 =
SR0 x (OS0 + X) / (OS0 +Y) 

where, 
  

					
	SR0	  	=	  	the maximum settlement rate in effect immediately prior to the close of business on the record date for such distribution;
			
	SR1	  	=	  	the maximum settlement rate in effect immediately after the close of business on such record date;
			
	OS0	  	=	  	the number of shares of our common stock outstanding immediately prior to the close of business on the record date for such distribution;
			
	X	  	=	  	the total number of shares of our common stock issuable pursuant to such rights, options or warrants; and
			
	Y	  	=	  	the number of shares of our common stock equal to the quotient of (A) the aggregate price payable to exercise such rights, options or warrants divided by (B) the average of the closing prices of our common
stock for the 10 consecutive trading days ending on, and including, the trading day immediately preceding the date of the announcement of the distribution of such rights, options or warrants.

 If any right, option or warrant described in this paragraph (2) is not exercised or converted prior to the
expiration of the exercisability or convertibility thereof (and as a result no additional shares of common stock are delivered or issued pursuant to such rights or warrants), the new maximum settlement rate shall be readjusted, as of the date of
such expiration, to the maximum settlement rate that would then be in effect had the increase with respect to the distribution of such rights, options or warrants been made on the basis of delivery or issuance of only the number of shares of common
stock actually delivered. 
 For purposes of this paragraph (2), in determining whether any rights, options or warrants entitle the holders to subscribe for
or purchase shares of the common stock at a price per share of our common stock less than the average of the closing prices of our common stock for the 10 consecutive trading days ending on, and including, the trading day immediately preceding the
date of the announcement of the distribution of such rights, options or warrants, and in determining the aggregate price payable to exercise such rights, options or warrants, there shall be taken into account any consideration received by us for
such rights, options or warrants and any amount payable on exercise or conversion thereof, the value of such consideration, if other than cash, to be determined in good faith by our board of directors. Any increase made under this paragraph
(2) will be made successively whenever any such rights, options or warrants are issued and shall become effective immediately after the close of business on the record date for such distribution. 

 (3) (a) If we distribute shares of capital stock, evidences of indebtedness or other assets
or property of us to all holders of our common stock (excluding (i) any dividend, distribution, rights, warrants or options as to which an adjustment was effected pursuant to clause (1) or (2) above, (ii) any dividend or
distribution paid exclusively in cash, and (iii) any spin-off to which the provisions in clause 3(b) below apply), the maximum settlement rate will be increased based on the following formula:

 SR1 = SR0 x SP0 / (SP0 – FMV) 

where, 
  

					
	SR0	  	=	  	the maximum settlement rate in effect immediately prior to the close of business on the record date for such distribution;
			
	SR1	  	=	  	the maximum settlement rate in effect immediately after the close of business on such record date;
			
	SP0	  	=	  	the closing price of our common stock on the trading day immediately preceding the ex-dividend date for such distribution; and
			
	FMV	  	=	  	the fair market value (as determined in good faith by our board of directors), on the record date for such dividend or distribution, of the shares of capital stock, evidences of indebtedness, assets or property so distributed,
expressed as an amount per share of our common stock.

 Notwithstanding the foregoing, if “FMV” (as defined above) exceeds “SP0” (as defined above), in lieu of the foregoing increase, each holder of a purchase contract shall receive, for each purchase contract, at the same time and upon the same terms as holders of
shares of our common stock, the amount of such distributed shares of capital stock, evidences of indebtedness or other assets or property that such holder would have received if such holder owned a number of shares of our common stock equal to the
maximum settlement rate on the record date for such dividend or distribution. 
 (b) However, if we distribute to all holders of our common
stock, capital stock of any class or series, or similar equity interest, of or relating to a subsidiary or other business unit, in each case, that will be listed on a U.S. national securities exchange, which we refer to as a “spin-off”, then the maximum settlement rate will instead be increased based on the following formula: 

SR1 = SR0 x (FMV0 + MP0) / MP0 

where, 
  

					
	SR0	  	=	  	the maximum settlement rate in effect immediately prior to the end of the valuation period (as defined below);
			
	SR1	  	=	  	the maximum settlement rate in effect immediately after the end of the valuation period;
			
	FMV0	  	=	  	the average of the closing price of the capital stock or similar equity interests distributed to holders of our common stock applicable to one share of our common stock over each of the 10 consecutive trading days commencing on, and
including, the ex-dividend date for such dividend or distribution (the “valuation period”); and
			
	MP0	  	=	  	the average of the closing price of our common stock over the valuation period.

 The adjustment to the maximum settlement rate under this paragraph 3(b) will occur on the last day of the valuation
period; provided that if a holder elects to early settle the purchase contracts, or the purchase contract settlement date occurs, in either case, during the valuation period, references with respect to 10 trading days shall be
deemed replaced with such lesser number of trading days as have elapsed between the ex-dividend date of such spin-off and the date on which such
holder elected its early settlement right, or the business day immediately preceding the purchase contract settlement date, as the case may be, in determining the maximum settlement rate. 

If any dividend or distribution described in this paragraph (3) is declared but not so paid or made, the new maximum settlement rate shall be readjusted,
as of the date our board of directors determines not to pay or make such dividend or distribution, to the maximum settlement rate that would then be in effect if such dividend or distribution had not been declared. 

 (4) If any regular, quarterly cash dividend or distribution made to all or substantially all
holders of our common stock during any quarterly fiscal period exceeds $0.9175 per share (the “reference dividend”), the maximum settlement rate will be increased based on the following formula: 

SR1 = SR0 x [(SP0 – T) / (SP0 – C)] 
 where, 

 

					
	SR0	  	=	  	the maximum settlement rate in effect immediately prior to the close of business on the record date for such distribution;
			
	SR1	  	=	  	the maximum settlement rate in effect immediately after the close of business on such record date;
			
	SP0	  	=	  	the closing price of our common stock on the record date for such distribution;
			
	C	  	=	  	the amount in cash per share we distribute to holders of our common stock; and
			
	T	  	=	  	the reference dividend; provided that if the dividend or distribution is not a regular quarterly cash dividend, the reference dividend will be deemed to be zero.

 Notwithstanding the foregoing, if “C” (as defined above) exceeds “SP0” (as defined above), in lieu of the foregoing increase, each holder of a purchase contract shall receive, for each purchase contract, at the same time and upon the same terms as holders of
shares of our common stock, the amount of distributed cash that such holder would have received if such holder owned a number of shares of our common stock equal to the maximum settlement rate on the record date for such cash dividend or
distribution. 
 The reference dividend will be subject to an inversely proportional adjustment whenever the maximum settlement rate is adjusted, other than
pursuant to this paragraph (4). For the avoidance of doubt, the reference dividend will be zero in the case of a cash dividend that is not a regular quarterly dividend. 

If any dividend or distribution described in this paragraph (4) is declared but not so paid or made, the new maximum settlement rate shall be readjusted,
as of the date our board of directors determines not to pay or make such dividend or distribution, to the maximum settlement rate that would then be in effect if such dividend or distribution had not been declared. 

(5) If we or any of our subsidiaries makes a payment in respect of a tender offer or exchange offer for our common stock to the extent that the
cash and value of any other consideration included in the payment per share of our common stock validly tendered or exchanged exceeds the closing price of a share of our common stock on the trading day next succeeding the last date on which tenders
or exchanges may be made pursuant to such tender or exchange offer, the maximum settlement rate will be increased based on the following formula: 

SR1 =
SR0 x [(FMV + (SP1 x OS1)] / (SP1 x OS0) 
 where, 

 

					
	SR0	  	=	  	the maximum settlement rate in effect immediately prior to the close of business on the trading day on which such tender or exchange offer expires;
			
	SR1	  	=	  	the maximum settlement rate in effect immediately after the close of business on the trading day immediately following the date such tender or exchange offer expires;
			
	FMV	  	=	  	the fair market value (as determined in good faith by our board of directors, whose good faith determination will be conclusive), at the close of business on the trading day immediately following the date such tender or exchange
offer expires, of the aggregate value of all cash and any other consideration paid or payable for shares validly tendered or exchanged and not withdrawn as of the expiration date;
			
	OS0	  	=	  	the number of shares of our common stock outstanding immediately prior to the last time tenders or exchanges may be made pursuant to such tender or exchange offer (prior to giving effect to the purchase or exchange of shares
pursuant to such tender or exchange offer);
			
	OS1	  	=	  	the number of shares of our common stock outstanding immediately after the last time tenders or exchanges may be made pursuant to such tender or exchange offer (after giving effect to the purchase or exchange of shares pursuant to
such tender or exchange offer); and
			
	SP1	  	=	  	the closing price of our common stock on the trading day next succeeding the date such tender or exchange offer expires.

 The adjustment to the maximum settlement rate under the preceding paragraph (5) will occur at the close
of business on the trading day on which such tender or exchange offer expires. 
 The
term “ex-dividend date,” when used with respect to any issuance or distribution on our common stock or any other security, means the first date on which our common stock or such other
security, as applicable, trades, regular way, on the principal U.S. securities exchange or quotation system on which our common stock or such other security, as applicable, is listed or quoted at that time, without the right to receive the issuance
or distribution. 
 We currently do not have a shareholders rights plan with respect to our common stock. To the extent that we have a shareholders rights
plan involving the issuance of share purchase rights or other similar rights to all or substantially all holders of our common stock in effect upon settlement of a purchase contract, you will receive, in addition to the common stock issuable upon
settlement of any purchase contract, the related rights for the common stock under the shareholders rights plan, unless, prior to any settlement of a purchase contract, the rights have separated from the common stock, in which case the maximum
settlement rate will be adjusted at the time of separation as if we made a distribution to all holders of our common stock as described in clause (3) above, subject to readjustment in the event of the expiration, termination or redemption of
the rights under the shareholder rights plan. 
 For United States federal income tax purposes, you may be treated as receiving a constructive distribution
from us with respect to the purchase contract if (1) the maximum settlement rate is adjusted (or fails to be adjusted) and, as a result of the adjustment (or failure to adjust), your proportionate interest in our assets or earnings and profits
is increased, and (2) the adjustment (or failure to adjust) is not made pursuant to a bona fide, reasonable anti-dilution formula. For example, if the maximum settlement rate is adjusted as a result of a distribution that is taxable to the
holders of our common stock, such as a cash dividend, you will be deemed to have received a “constructive distribution” of our stock. Thus, under certain circumstances, an adjustment to the maximum settlement rate might give rise to a
taxable dividend to you even though you will not receive any cash in connection with such adjustment. In addition, “non-U.S. holders” may be deemed to have received a distribution subject
to United States federal withholding tax. 
 In addition, we may increase the maximum settlement rate if our board of directors deems it advisable to avoid
or diminish any income tax to holders of our common stock resulting from any dividend or distribution of shares (or rights to acquire shares) or from any event treated as a dividend or distribution for income tax purposes or for any other reasons.

 Adjustments to the maximum settlement rate will be calculated to the nearest ten thousandth of a share. No adjustment to the maximum settlement rate will
be required unless the adjustment would require an increase or decrease of at least one percent in the maximum settlement rate. If any adjustment is not required to be made because it would not change the maximum settlement rate by at least one
percent, then the adjustment will be carried forward and taken into account in any subsequent adjustment. All adjustments will be made not later than the purchase contract settlement date, any early settlement date, any fundamental change early
settlement date and the time at which we are required to determine the relevant settlement rate or amount of make-whole shares (if applicable) in connection with any settlement with respect to the purchase contracts. 

No adjustment to the maximum settlement rate will be made if holders of purchase contracts participate, as a result of holding the purchase contracts and
without having to settle the purchase contracts that form part of the Equity Units, in the transaction that would otherwise give rise to an adjustment as if they held, per purchase contract, a number of shares of our common stock equal to the
maximum settlement rate, at the same time and upon the same terms as the holders of common stock participate in the transaction. 
 Except as described
above, the maximum settlement rate will not be adjusted: 
  

	 	•	 	 upon the issuance of any shares of our common stock pursuant to any present or future plan providing for the
reinvestment of dividends or interest payable on our securities and the investment of additional optional amounts in shares of our common stock under any plan; 

 

	 	•	 	 upon the issuance of options, restricted stock or other awards in connection with any employment contract,
executive compensation plan, benefit plan or other similar arrangement with or for the benefit of any one or more employees, officers, directors, consultants or independent contractors or the exercise of such options or other awards;

	 	•	 	 upon the issuance of any shares of our common stock pursuant to any option, warrant, right or exercisable,
exchangeable or convertible security outstanding as of the date the Equity Units were first issued; 

  

	 	•	 	 for a change in the par value or no par value of the common stock; or 

 

	 	•	 	 for accumulated and unpaid contract adjustment payments. 

We will, as promptly as practicable after the maximum settlement rate is adjusted, provide written notice of the adjustment to the holders of Equity Units.

 If an adjustment is made to the maximum settlement rate, an adjustment also will be made to the reference price on an inversely proportional basis solely
to determine which of the clauses of the definition of settlement rate will be applicable to determine the settlement rate with respect to the purchase contract settlement date, any early settlement date or any fundamental change early settlement
date. 
 If any adjustment to the maximum settlement rate becomes effective, or any effective date, expiration
time, ex-dividend date or record date for any stock split or reverse stock split, tender or exchange offer, issuance, dividend or distribution (relating to a required maximum settlement rate
adjustment) occurs, during the period beginning on, and including, (i) the open of business on a first trading day of the market value averaging period or (ii) in the case of an early settlement or fundamental change early settlement, the
relevant early settlement date or the fundamental change early settlement date and, in each case, ending on, and including, the date on which we deliver shares of our common stock under the related purchase contract, we will make appropriate
adjustments to the maximum settlement rate and/or the number of shares of our common stock deliverable upon settlement with respect to the purchase contract, in each case, consistent with the methodology used to determine the anti-dilution
adjustments set forth above. If any adjustment to the maximum settlement rate becomes effective, or any effective date, expiration time, ex-dividend date or record date for any stock split or reverse
stock split, tender or exchange offer, issuance, dividend or distribution (relating to a required maximum settlement rate adjustment) occurs, during the period used to determine the applicable market value, the “stock price” or any other
averaging period hereunder, we will make appropriate adjustments to the applicable prices, consistent with the methodology used to determine the anti-dilution adjustments set forth above. 

Reorganization Events 
 The following events are defined
as “reorganization events”: 
  

	 	•	 	 any recapitalization, reclassification or change of our common stock (other than changes resulting from a
subdivision or combination); 

  

	 	•	 	 any consolidation, merger or combination involving us; 

 

	 	•	 	 any sale, lease or other transfer to another person of the consolidated assets of ours and our subsidiaries
substantially as an entirety; or 

  

	 	•	 	 any statutory exchange of our common stock; 

in each case as a result of which our common stock would be converted into, or exchanged for, stock, other securities, other property or assets (including
cash or any combination thereof) (“exchange property”). 
 Following the effective date of a reorganization event, the settlement rate shall be
determined by reference to the value of an exchange property unit, and we will deliver, upon settlement of any purchase contract, a number of exchange property units equal to the number of shares of our common stock that we would otherwise be
required to deliver. An “exchange property unit” is the kind and amount of exchange property receivable in such reorganization event (without any interest thereon, and without any right to dividends or distribution thereon which have a
record date that is prior to the applicable settlement date) per share of our common stock by a holder of common stock that is not a person with which we are consolidated or into which we are merged or which merged into us or to which such sale or
transfer was made, as the case may be (we refer to any such person as a “constituent person”), or an affiliate of a constituent person, to the extent such reorganization event provides for different treatment of common stock held by the
constituent person and/or the affiliates of the constituent person, on the one hand, and non-affiliates of a constituent person, on the other hand. In the event holders of our common stock (other
than any constituent person or affiliate thereof) have the opportunity to elect the form of consideration to be received in such transaction, the exchange property unit that holders of the Corporate Units or Treasury Units are entitled to receive
will be deemed to be the weighted average of the types and amounts of consideration actually received by the holders of our common stock. 

 In the event of such a reorganization event, the person formed by such consolidation or surviving such
merger or, if other than us, the person which acquires our assets and those of our subsidiaries substantially as an entirety will execute and deliver to the purchase contract agent an agreement providing that the holder of each Equity Unit that
remains outstanding after the reorganization event (if any) will have the rights described in the preceding paragraph and expressly assuming all of our obligations under the purchase contracts, the purchase contract and pledge agreement, the
convertible preferred stock and the remarketing agreement. Such supplemental agreement will provide for adjustments to the amount of any securities constituting all or a portion of an exchange property unit and/or adjustments to the maximum
settlement rate, which, for events subsequent to the effective date of such reorganization event, will be as nearly equivalent as may be practicable, as determined by us in our sole commercially reasonable discretion, to the adjustments provided for
under “—Anti-dilution Adjustments” above (it being understood that any such adjustment may be zero and that no such adjustments shall be required with respect to any portion of the exchange property that consists of cash). The
provisions described in the preceding two paragraphs shall similarly apply to successive reorganization events. 
 In connection with any reorganization
event, we will also adjust the reference dividend based on the number of shares of common stock comprising an exchange property unit and (if applicable) the value of any non-stock consideration
comprising an exchange property unit. If an exchange property unit is composed solely of non-stock consideration, the reference dividend will be zero. 

Termination 
 The purchase contract and pledge agreement
provides that the purchase contracts and the obligations and rights of us and of the holders of Corporate Units, Treasury Units and Cash Settled Units thereunder, including the holders’ obligation and right to purchase and receive shares of our
common stock and the right to receive accrued and unpaid contract adjustment payments (including deferred contract adjustment payments), will immediately and automatically terminate upon the occurrence of certain events of bankruptcy, insolvency or
reorganization with respect to us. 
 Upon any such termination and receipt of written notice from the purchase contract agent of the same, the collateral
agent will release the convertible preferred stock, the applicable ownership interest in the Treasury portfolio, Treasury securities or cash, as the case may be, from the pledge arrangement and transfer such convertible preferred stock, the
applicable ownership interest in the Treasury portfolio, Treasury securities or cash to the purchase contract agent or transfer agent, as applicable, for distribution to the holders of Corporate Units, Treasury Units and Cash Settled Units. Upon any
termination, however, such release and distribution may be subject to a delay. In the event that we become the subject of a case under the U.S. Bankruptcy Code, such delay may occur as a result of the automatic stay under Section 362 of the
U.S. Bankruptcy Code or other relief sought by the collateral agent, the purchase contract agent or other party asserting an interest in the pledged securities or contending that such termination is not effective and may continue until such
automatic stay has been lifted or efforts to obtain such other relief has been resolved against such party. 
 Moreover, claims arising out of the
convertible preferred stock will be subject to the equitable jurisdiction and powers of the bankruptcy court. 
 Pledged Securities and Pledge 

The shares of convertible preferred stock that are a component of the Corporate Units or, following a successful optional remarketing, solely with respect to
the Treasury securities described in clause (1) of the definition applicable ownership interest, the applicable ownership interests in the Treasury portfolio, that are a component of the Corporate Units or, if substituted, the Treasury
securities that are a component of the Treasury Units or cash that is a component of the Cash Settled Units, collectively, the “pledged securities,” will be pledged to the collateral agent for our benefit pursuant to the purchase contract
and pledge agreement to secure your obligation to purchase shares of our common stock under the related purchase contracts. The rights of the holders of the Corporate Units, Treasury Units and Cash Settled Units with respect to such pledged
securities will be subject to our security interest therein. No holder of Corporate Units, Treasury Units or Cash Settled Units will be permitted to withdraw the pledged securities related to such Corporate Units, Treasury Units or Cash Settled
Units from the pledge arrangement except: 
  

	 	•	 	 in the case of Corporate Units, to substitute a Treasury security or cash, as the case may be, for the related
convertible preferred stock as provided for under “Description of the Equity Units—Creating Treasury Units by Substituting a Treasury Security for Convertible Preferred Stock” and “Description of the Equity Units—Creating
Cash Settled Units”; 

	 	•	 	 in the case of Treasury Units, to substitute convertible preferred stock for the related Treasury security, as
provided for under “Description of the Equity Units—Recreating Corporate Units from Treasury Units”; and 

  

	 	•	 	 upon any early settlement, cash settlement or termination of the related purchase contracts.

 Subject to our security interest and the terms of the purchase contract and pledge agreement, each holder of Corporate Units, unless
the Treasury portfolio has replaced the convertible preferred stock as a component of the Corporate Units, will be entitled through the purchase contract agent or transfer agent, as applicable, and the collateral agent to all of the proportional
rights and preferences of the related convertible preferred stock. Each holder of Treasury Units and each holder of Corporate Units, if the Treasury portfolio has replaced the convertible preferred stock as a component of the Corporate Units, will
retain ownership of the related Treasury securities or, solely with respect to the Treasury securities described in clause (1) of the definition applicable ownership interest, the applicable ownership interests in the Treasury portfolio, as
applicable, pledged in respect of the related purchase contracts. Each holder of Cash Settled Units will retain ownership of the related cash pledged in respect of the related purchase contracts. We will have no interest in the pledged securities
other than our security interest. 
 Except as described in “Certain Provisions of the Purchase Contract and Pledge Agreement—General,” upon
receipt of distributions on the pledged securities, the collateral agent will distribute such payments to the purchase contract agent, which in turn will distribute those payments, together with contract adjustment payments received from us, to the
holders in whose names the Corporate Units, Treasury Units or Cash Settled Units are registered at the close of business on the record date preceding the date of such distribution. 

Certain Provisions of the Purchase Contract and Pledge Agreement 

General 
 Except as described under “—Book-Entry
System for Corporate Units, Treasury Units and Cash Settled Units” below, payments on the Corporate Units, Treasury Units and Cash Settled Units will be payable, the purchase contracts will be settled and transfers of the Corporate Units,
Treasury Units and Cash Settled Units will be registrable at the offices or agency of the purchase contract agent in the Borough of Manhattan, The City of New York. In addition, if the Corporate Units, Treasury Units or Cash Settled Units do not
remain in book-entry only form, we have the option to make payments on the Corporate Units, Treasury Units and Cash Settled Units by check mailed to the address of the person entitled thereto as shown on the security register or by a wire transfer
to the account designated by the holder by a prior written notice. 
 Shares of our common stock will be delivered on the purchase contract settlement date
(or earlier upon early settlement), or, if the purchase contracts have terminated, the related pledged securities will be delivered (potentially after a delay as a result of the imposition of the automatic stay under the U.S. Bankruptcy Code or
efforts by other parties to obtain other relief from the bankruptcy court, see “Description of the Purchase Contracts—Termination”) at the offices or agency of the purchase contract agent or transfer agent, as applicable, upon
presentation and surrender of the applicable Corporate Unit, Treasury Unit or Cash Settled Unit certificate, if in certificated form. 
 If Corporate Units,
Treasury Units or Cash Settled Units are in certificated form and a holder fails to present and surrender the certificate evidencing the Corporate Units, Treasury Units or Cash Settled Units to the purchase contract agent on or prior to the purchase
contract settlement date, the shares of our common stock issuable upon settlement of the related purchase contract will be registered in the name of the purchase contract agent. The shares of our common stock, together with any distributions, will
be held by the purchase contract agent as agent for the benefit of the holder until the certificate is presented and surrendered or the holder provides satisfactory evidence that the certificate has been destroyed, lost or stolen, together with any
indemnity or security that may be required by the purchase contract agent and us. 
 If the purchase contracts terminate prior to the purchase contract
settlement date, the related pledged securities are transferred to the purchase contract agent for distribution to the holders, and a holder fails to present and surrender the certificate evidencing the holder’s Corporate Units, Treasury Units
or Cash Settled Units, if in certificated form, to the purchase contract agent, the related pledged securities delivered to the purchase contract agent and payments on the pledged securities will be held by the purchase contract agent as agent for
the benefit of the holder until the applicable certificate is presented, if in certificated form, or the holder provides the evidence and indemnity or security described above. 

 
No service charge will be made for any registration of transfer or exchange of the Corporate Units, Treasury Units or Cash Settled Units, except for any tax or other governmental charge that may
be imposed in connection therewith. 
 The purchase contract agent will have no obligation to invest or to pay interest on any amounts held by the purchase
contract agent pending payment to any holder. 
 Modification 

The purchase contract and pledge agreement contains provisions permitting us, the purchase contract agent and the collateral agent, to modify the purchase
contract and pledge agreement without the consent of the holders for any of the following purposes: 
  

	 	•	 	 to evidence the succession of another corporation to our obligations; 

 

	 	•	 	 to add to the covenants for the benefit of holders or to surrender any of our rights or powers under those
agreements; 

  

	 	•	 	 to evidence and provide for the acceptance of appointment of a successor purchase contract agent or a successor
collateral agent or securities intermediary; 

  

	 	•	 	 to conform the provisions of the purchase contract and pledge agreement to the description contained in this
prospectus supplement; 

  

	 	•	 	 to cure any ambiguity, defect or inconsistency; or 

 

	 	•	 	 to make such other provisions in regard to matters or questions arising under the purchase contract and pledge
agreement that do not adversely affect the interests of any holders of Equity Units in any material respect. 

 The purchase contract and
pledge agreement also contains provisions preventing us, the purchase contract agent and the collateral agent, subject to certain limited exceptions, from modifying the terms of the purchase contracts and the purchase contract and pledge agreement
without the consent of the holders of not less than a majority of the outstanding purchase contracts. However, no modification may, without the consent of the holder of each outstanding purchase contract affected thereby: 

 

	 	•	 	 subject to our right to defer contract adjustment payments, change any payment date; 

 

	 	•	 	 change the place or currency or method of payment or reduce any contract adjustment payments;

  

	 	•	 	 impair the right to institute suit for the enforcement of a purchase contract or any contract adjustment payment
or deferred contract adjustment payment (including compounded contract adjustment payments thereon); 

  

	 	•	 	 except as described under “Description of the Purchase Contracts—Early Settlement” or
“—Anti-dilution Adjustments,” reduce the number of shares of our common stock purchasable under a purchase contract, increase the purchase price of the shares of our common stock issuable on settlement of any purchase contract, change
the purchase contract settlement date or the right to early settlement; 

  

	 	•	 	 adversely affect the holder’s rights under a purchase contract in any material
respect, provided that any amendment made solely to conform the provisions of the purchase contract and pledge agreement to the description contained in the prospectus supplement filed by us with the Securities and Exchange
Commission on June 13, 2019 will not be deemed to adversely affect the interests of the holders; 

  

	 	•	 	 change the amount or type of collateral required to be pledged to secure a holder’s obligations under the
purchase contract and pledge agreement, impair the right of the holder of any purchase contract to receive distributions on such collateral, or otherwise adversely affect the holder’s rights in or to such collateral; 

 

	 	•	 	 reduce any contract adjustment payments or any deferred contract adjustment payments (including compounded
contract adjustment payments); or 

  

	 	•	 	 reduce the above-stated percentage of outstanding purchase contracts whose holders’ consent is required for
the modification or amendment of the provisions of the purchase contracts and the purchase contract and pledge agreement; 

 provided that if any amendment or proposal would adversely affect only the Corporate Units, only
the Treasury Units or only the Cash Settled Units, then only the affected voting group of holders will be entitled to vote on such amendment or proposal, and such amendment or proposal will not be effective except with the consent of the holders of
not less than a majority of such voting group or, if referred to in the immediately preceding eight bullets above, all of the holders of such voting group. 

We will be entitled to set any day as a record date for the purpose of determining the holders of outstanding Equity Units entitled to give or take any
demand, direction, consent or other action under the Equity Units, in the manner and subject to the limitations provided in the purchase contract and pledge agreement. In certain circumstances, the purchase contract agent also will be entitled to
set a record date for action by holders. If such a record date is set for any action to be taken by holders of particular Equity Units, such action may be taken only by persons who are holders of such Equity Units at the close of business on
the record date. 
 No Consent to Assumption; Agreement by Purchasers 

Each holder of a Corporate Unit, a Treasury Unit or a Cash Settled Unit is deemed under the terms of the purchase contract and pledge agreement, by the
purchase of such Corporate Unit, Treasury Unit or Cash Settled Unit, to have expressly withheld any consent to the assumption (i.e., affirmance) of the related purchase contracts by us, our receiver, liquidator or trustee in the event that we become
the subject of a case under the U.S. Bankruptcy Code or other similar state or federal law providing for reorganization or liquidation. 

Consolidation, Merger and Conveyance of Assets as an Entirety 

We will agree not to merge or consolidate with any other person or sell or convey all or substantially all of our assets to any person unless (i) either
we are the continuing entity, or the successor entity (if other than us) is a corporation organized and existing under the laws of the United States of America or a State thereof or the District of Columbia and such corporation expressly
assumes all of our responsibilities and liabilities under the purchase contracts, the Corporate Units, the Treasury Units, the Cash Settled Units, the purchase contract and pledge agreement and the remarketing agreement (if any) by one or more
supplemental agreements in form satisfactory to the purchase contract agent and the collateral agent, executed and delivered to the purchase contract agent and the collateral agent by such corporation, and (ii) we or such successor corporation,
as the case may be, will not, immediately after such merger or consolidation, or such sale or conveyance, be in default in the performance of any of its obligations or covenants under such agreements. 

In case of any such consolidation, merger, sale or conveyance, and upon any such assumption by the successor corporation, such successor corporation shall
succeed to and be substituted for us, with the same effect as if it had been named in the purchase contracts, the Corporate Units, the Treasury Units, the Cash Settled Units, the purchase contract and pledge agreement and the remarketing agreement
(if any) as us and (other than in the case of a lease) we shall be relieved of any further obligation under the purchase contracts, the Corporate Units, the Treasury Units, the Cash Settled Units, the purchase contract and pledge agreement and the
remarketing agreement (if any). 
 Title 
 We, the
purchase contract agent and the collateral agent may treat the registered owner of any Corporate Units, Treasury Units or Cash Settled Units as the absolute owner of the Corporate Units, Treasury Units or Cash Settled Units for the purpose of making
payment (subject to the record date provisions described above), settling the related purchase contracts and for all other purposes. 
 Replacement of
Equity Unit Certificates 
 In the event that physical certificates have been issued, any mutilated Corporate Unit, Treasury Unit or Cash Settled Unit
certificate will be replaced by us at the expense of the holder upon surrender of the certificate to the purchase contract agent. Corporate Unit, Treasury Unit or Cash Settled Unit certificates that become destroyed, lost or stolen will be replaced
by us at the expense of the holder upon delivery to us and the purchase contract agent of evidence of their destruction, loss or theft satisfactory to us and the purchase contract agent. In the case of a destroyed, lost or stolen Corporate Unit,
Treasury Unit or Cash Settled Unit certificate, an indemnity or security satisfactory to the purchase contract agent and us may be required at the expense of the holder before a replacement certificate will be issued. 

 Notwithstanding the foregoing, we will not be obligated to issue any Corporate Unit, Treasury Unit or Cash
Settled Unit certificates on or after the business day immediately preceding the earliest of any early settlement date, any fundamental change early settlement date, the purchase contract settlement date or the date on which the purchase contracts
have terminated. The purchase contract and pledge agreement will provide that, in lieu of the delivery of a replacement Corporate Unit, Treasury Unit or Cash Settled Unit certificate following any of these dates, the transfer agent, on behalf of the
purchase contract agent, upon delivery of the evidence and indemnity or security described above, will deliver the shares of our common stock issuable pursuant to the purchase contracts included in the Corporate Units, Treasury Units or Cash Settled
Units evidenced by the certificate, or, if the purchase contracts have terminated prior to the purchase contract settlement date, transfer the pledged securities included in the Corporate Units, Treasury Units or Cash Settled Units evidenced by the
certificate. 
 Governing Law 
 The purchase contracts
and the purchase contract and pledge agreement will be governed by, and construed in accordance with, the laws of the State of New York. 
 Information
Concerning the Purchase Contract Agent 
 Deutsche Bank Trust Company Americas (or its successor) is the purchase contract agent. The purchase contract
agent acts as the agent for the holders of Corporate Units, Treasury Units and Cash Settled Units. The purchase contract agent is not obligated to take any discretionary action in connection with a default under the terms of the Corporate Units, the
Treasury Units, the Cash Settled Units or the purchase contract and pledge agreement. 
 The purchase contract and pledge agreement contains provisions
limiting the liability of and providing indemnification to the purchase contract agent. The purchase contract and pledge agreement also contains provisions under which the purchase contract agent may resign or be replaced. Such resignation or
replacement will be effective upon the appointment of a successor. 
 We and certain of our affiliates maintain banking relationships with Deutsche Bank
Trust Company Americas or its affiliates. Deutsche Bank Trust Company Americas also serves as trustee or series trustee under other indentures under which we and certain of our affiliates have issued securities. Deutsche Bank Trust Company Americas
and its affiliates have purchased, and are likely to purchase in the future, our securities and securities of our affiliates. 
 Information Concerning
the Collateral Agent 
 HSBC Bank USA, National Association is the collateral agent. The collateral agent acts solely as our agent and has not assumed
any obligation or relationship of agency or trust for or with any of the holders of the Corporate Units, the Treasury Units and the Cash Settled Units except for the obligations owed by a pledgee of property to the owner thereof under the purchase
contract and pledge agreement and applicable law. 
 The purchase contract and pledge agreement contains provisions limiting the liability of and providing
indemnification to the collateral agent. The purchase contract and pledge agreement also contains provisions under which the collateral agent may resign or be replaced. Such resignation or replacement will be effective upon the appointment of a
successor. 
 Miscellaneous 
 The purchase contract and
pledge agreement provides that we will pay all fees and expenses (including fees and expenses of counsel) related to the retention of the collateral agent and the purchase contract agent. Holders who elect to substitute the related pledged
securities, thereby creating Treasury Units or Cash Settled Units or recreating Corporate Units, however, will be responsible for any fees or expenses (including fees and expenses of counsel) payable in connection with such substitution, as well as
for any commissions, fees or other expenses incurred in acquiring the pledged securities to be substituted. We will not be responsible for any such fees or expenses. 

 Book-Entry System for Corporate Units, Treasury Units and Cash Settled Units 

The Depository Trust Company, or DTC, which we refer to along with its successors in this capacity as the depositary, acts as securities depositary for
the Corporate Units, Treasury Units and Cash Settled Units. The Corporate Units, Treasury Units and Cash Settled Units were issued as fully registered securities registered in the name of Cede & Co., the depositary’s nominee. One or
more fully registered global security certificates, representing the total aggregate number of Corporate Units, Treasury Units and Cash Settled Units, were issued and deposited with the depositary or its custodian and bear a legend regarding the
restrictions on exchanges and registration of transfer referred to below. 
 The laws of some jurisdictions may require that some purchasers of securities
take physical delivery of securities in certificated form. These laws may impair the ability to transfer beneficial interests in the Corporate Units, Treasury Units and Cash Settled Units so long as the Corporate Units, Treasury Units and Cash
Settled Units are represented by global security certificates. 
 DTC advises that it is a limited-purpose trust company organized under the New York
Banking Law, a “banking organization” within the meaning of the New York Banking Law, a member of the Federal Reserve System, a “clearing corporation” within the meaning of the New York Uniform Commercial Code and a
“clearing agency” registered pursuant to the provisions of Section 1A of the Exchange Act. The depositary holds securities that its participants deposit with the depositary. The depositary also facilitates the settlement among
participants of securities transactions, including transfers and pledges, in deposited securities through electronic computerized book-entry changes in participants’ accounts, thereby eliminating the need for physical movement of securities
certificates. Direct participants include securities brokers and dealers, banks, trust companies, clearing corporations and certain other organizations. The depositary is a wholly-owned subsidiary of The Depository Trust & Clearing
Corporation (“DTCC”). DTCC is the holding company for DTC, National Securities Clearing Corporation, and Fixed Income Clearing Corporation, all of which are registered clearing agencies. DTCC is owned by the users of its regulated
subsidiaries. Access to the depositary’s system is also available to others, including securities brokers and dealers, banks, trust companies and clearing corporations that clear transactions through or maintain a custodial relationship with a
direct participant, either directly or indirectly. The rules applicable to the depositary and its participants are on file with the SEC. 
 We will issue
the Corporate Units, Treasury Units and Cash Settled Units in definitive certificated form if the depositary notifies us that it is unwilling or unable to continue as depositary or the depositary ceases to be a clearing agency registered under the
Exchange Act and a successor depositary is not appointed by us within 90 calendar days. In addition, beneficial interests in a global security certificate may be exchanged for definitive certificated Corporate Units, Treasury Units or Cash
Settled Units upon request by or on behalf of the depositary in accordance with customary procedures following the request of a beneficial owner seeking to exercise or enforce its rights under such Corporate Units, Treasury Units or Cash Settled
Units. If we determine at any time that the Corporate Units, Treasury Units or Cash Settled Units shall no longer be represented by global security certificates, we will inform the depositary of such determination and the depositary will, in turn,
notify participants of their right to withdraw their beneficial interest from the global security certificates, and if such participants elect to withdraw their beneficial interests, we will issue certificates in definitive form in exchange for such
beneficial interests in the global security certificates. Any global Corporate Unit, Treasury Unit or Cash Settled Unit, or portion thereof that is exchangeable pursuant to this paragraph will be exchangeable for Corporate Unit, Treasury Unit
or Cash Settled Unit certificates, as the case may be, registered in the names directed by the depositary. We expect that these instructions will be based upon directions received by the depositary from its participants with respect to ownership of
beneficial interests in the global security certificates. 
 As long as the depositary or its nominee is the registered owner of the global security
certificates, the depositary or its nominee, as the case may be, will be considered the sole owner and holder of the global security certificates and all Corporate Units, Treasury Units and Cash Settled Units represented by these certificates for
all purposes under the Corporate Units, Treasury Units, Cash Settled Units and the purchase contract and pledge agreement. Except in the limited circumstances referred to above, owners of beneficial interests in global security certificates: 

 

	 	•	 	 will not be entitled to have the Corporate Units, the Treasury Units or the Cash Settled Units represented by
these global security certificates registered in their names, and 

  

	 	•	 	 will not be considered to be owners or holders of the global security certificates or any Corporate Units,
Treasury Units or Cash Settled Units represented by these certificates for any purpose under the Corporate Units, Treasury Units, Cash Settled Units or the purchase contract and pledge agreement. 

 All payments on the Corporate Units, Treasury Units and Cash Settled Units represented by the global
security certificates and all transfers and deliveries of related convertible preferred stock, Treasury securities, cash and common stock will be made to the depositary or its nominee, as the case may be, as the holder of the securities. 

Ownership of beneficial interests in the global security certificates will be limited to participants or persons that may hold beneficial interests through
institutions that have accounts with the depositary or its nominee. Ownership of beneficial interests in global security certificates will be shown only on, and the transfer of those ownership interests will be effected only through, records
maintained by the depositary or its nominee, with respect to participants’ interests, or any participant, with respect to interests of persons held by the participant on their behalf. Procedures for settlement of purchase contracts on the
purchase contract settlement date, or upon early settlement, will be governed by arrangements among the depositary, participants and persons that may hold beneficial interests through participants designed to permit settlement without the physical
movement of certificates. Payments, transfers, deliveries, exchanges and other matters relating to beneficial interests in global security certificates may be subject to various policies and procedures adopted by the depositary from time to time.
None of us, the purchase contract agent or any agent of us or the purchase contract agent will have any responsibility or liability for any aspect of the depositary’s or any participant’s records relating to, or for payments made on
account of, beneficial interests in global security certificates, or for maintaining, supervising or reviewing any of the depositary’s records or any participant’s records relating to these beneficial ownership interests. 

Although the depositary has agreed to the foregoing procedures in order to facilitate transfers of interest in the global security certificates among
participants, the depositary is under no obligation to perform or continue to perform these procedures, and these procedures may be discontinued at any time. We will not have any responsibility for the performance by the depositary or its direct
participants or indirect participants under the rules and procedures governing the depositary. 
 The information in this section concerning the depositary
and its book-entry system has been obtained from sources that we believe to be reliable, but we have not attempted to verify the accuracy of this information. 

Description of the Convertible Preferred Stock 

General 
 In connection with the issuance of the Corporate
Units, we amended our articles of incorporation creating a new series of our preferred stock designated as the 1.75% Series A Cumulative Perpetual Convertible Preferred Stock, which we refer to as the “convertible preferred stock.” We
shall not (i) change any terms of the convertible preferred stock except as set forth in the preferred stock articles of amendment and (ii) issue any additional shares of the convertible preferred stock other than in accordance with the
preferred stock articles of amendment. 
 In connection with the issuance of the Corporate Units, we issued 1,610,000 shares of convertible preferred stock.
Upon issuance, the convertible preferred stock was validly issued, fully paid and non-assessable. 
 Each
Corporate Unit includes a 1/10, or 10%, undivided beneficial ownership interest in one share of convertible preferred stock with an initial $1,000 liquidation preference that corresponds to the stated amount of $100 per Corporate Unit. 

We do not intend to list the convertible preferred stock that are not a part of Corporate Units on any securities exchange. 

Ranking 
 The convertible preferred stock, with respect to
dividend rights or rights upon our liquidation, winding-up or dissolution, ranks: 
  

	 	•	 	 senior to all classes or series of our common stock and to any other class or series of our capital stock
expressly designated as ranking junior to the convertible preferred stock; 

  

	 	•	 	 on parity with any other class or series of our capital stock expressly designated as ranking on parity with the
convertible preferred stock; 

	 	•	 	 junior to any other class or series of our capital stock expressly designated as ranking senior to the
convertible preferred stock; and 

  

	 	•	 	 junior to our existing and future indebtedness and other liabilities (including trade payables).

 The term “capital stock” does not include convertible or exchangeable debt securities, which, prior to conversion or
exchange, will rank senior in right of payment to the shares of convertible preferred stock. 
 In the case of our liquidation, dissolution or winding up,
holders of the convertible preferred stock will not have the right to receive any payment or distribution unless all of our liabilities are first paid in full and the priority of any senior stock is satisfied. 

Other than the 800,000 shares of 4.65% Series B Fixed-Rate Reset Cumulative Redeemable Perpetual Preferred Stock with a liquidation preference of $1,000 per
share that we issued in December 2019, we currently have no capital stock outstanding that is senior to or on parity with the convertible preferred stock, and we own all of the equity interest of our subsidiaries. Our indebtedness is senior in right
of payment to the convertible preferred stock. In addition, the convertible preferred stock will be structurally subordinated to all debt, preferred stock and other liabilities of our subsidiaries, which means that creditors and any preferred
stockholders of our subsidiaries will be paid from the assets of such subsidiaries before holders of the convertible preferred stock would have any claims to those assets. 

Dividends 
 Holders of the convertible preferred stock
will receive when, as and if authorized by our board of directors and declared by us, cumulative dividends at the rate of 1.75% per year (the “dividend rate”) on the $1,000 liquidation preference per share of the convertible preferred
stock, payable in cash, shares of our common stock, or a combination of cash and shares of our common stock, at our election. 
 Dividends will accumulate
from the most recent date of payment, and will be payable to investors quarterly in arrears on March 1, June 1, September 1 and December 1 of each year, each a “dividend payment date,” to the person whose name appears
in our stock records at the close of business on the applicable record date, which will be the fifteenth day of the month immediately preceding the month in which the relevant dividend payment date falls (whether or not a business day) or, with
respect to any dividend payment date scheduled to occur on or prior to June 1, 2022, if (x) the Corporate Units are held in global book-entry form and (y) separate shares of the convertible preferred stock are held in global
book-entry form, the record date will be the business day immediately preceding the applicable dividend payment date. We refer to each period beginning on and including a dividend payment date (or, if no dividends have been paid on the convertible
preferred stock, the date of first issuance) to, but excluding, the next dividend payment date as a “dividend period.” 
 We will calculate
dividends on the convertible preferred stock on the basis of a 360-day year of twelve 30-day months. Dollar amounts resulting from that calculation
will be rounded to the nearest cent, with one-half cent being rounded upward. Dividends on the convertible preferred stock will cease to accumulate upon conversion, as described below. 

If a dividend payment date falls on a date that is not a business day, such dividend payment date will be postponed to the next succeeding business day,
provided that, if such business day falls in the next succeeding calendar month, the dividend payment date will be brought forward to the immediately preceding business day. 

Dividends on the convertible preferred stock will accumulate whether or not: 
  

	 	•	 	 we have earnings; 

  

	 	•	 	 the payment of those dividends is then permitted under Virginia law; or 

 

	 	•	 	 those dividends are authorized or declared. 

So long as any shares of convertible preferred stock remain outstanding, except as described in the second following paragraph, unless full cumulative
dividends on the convertible preferred stock for all past dividend periods (including compounded dividends thereon) shall have been or contemporaneously are declared and paid or declared and a sum or number of shares of common stock sufficient for
the payment thereof is set apart for payment, we will not: 
  

	 	•	 	 declare and pay or declare and set aside for payment of dividends, and we will not declare and make any
distribution of cash or other property, directly or indirectly, on or with respect to any shares of our common stock or shares of any other class or series of our capital stock ranking, as to dividends, on parity with or junior to the convertible
preferred stock, for any period; 

	 	•	 	 redeem, purchase or otherwise acquire for any consideration, or make any other distribution of cash or other
property, directly or indirectly, on or with respect to, or pay or make available any monies for a sinking fund for the redemption of, any common stock or shares of any other class or series of our capital stock ranking, as to dividends or upon
liquidation, on parity with or junior to the convertible preferred stock; or 

  

	 	•	 	 make any contract adjustment payments under the purchase contracts or any payment under any similar agreement
providing for the issuance by us of capital stock on a forward basis. 

 The foregoing sentence, however, will not
prohibit: 
  

	 	•	 	 purchases, redemptions or other acquisitions of shares of capital stock ranking junior to the convertible
preferred stock in connection with any employment contract, benefit plan or other similar arrangement with or for the benefit of current or former employees, officers, directors or consultants; 

 

	 	•	 	 purchases of shares of our common stock pursuant to a contractually binding requirement to buy stock existing
prior to the commencement of the first dividend period for which dividends are unpaid, including under a contractually binding stock repurchase plan; 

  

	 	•	 	 the purchase of, or the payment of cash in lieu of, fractional interests in shares of capital stock ranking
junior to the convertible preferred stock issued by us (i) in connection with a bona fide acquisition of a business or (ii) pursuant to the conversion or exchange provisions of such capital stock or securities convertible into or
exchangeable for such capital stock; 

  

	 	•	 	 any declaration of a dividend on our capital stock in connection with the implementation of a shareholders rights
plan designed to protect us against unsolicited offers to acquire our capital stock, or the issuance of our capital stock under any such plan in the future, or the redemption or repurchase of any such rights pursuant thereto; 

 

	 	•	 	 dividends or distributions payable solely in capital stock ranking junior to the convertible preferred stock, or
warrants, options or rights to acquire such capital stock, other than any indebtedness or our capital stock ranking, as to dividends or upon liquidation, on parity with or senior to the convertible preferred stock, in each case, convertible into our
capital stock ranking junior to the convertible preferred stock; or 

  

	 	•	 	 the conversion into or exchange for other shares of any class or series of capital stock ranking junior to the
convertible preferred stock. 

 We will not permit any of our subsidiaries to purchase or otherwise acquire for consideration any shares
of our stock unless we could, under the above paragraph, purchase or otherwise acquire such shares at such time and in such manner. We refer to the provisions described in this paragraph and the above paragraph as the “dividend blocker
provisions.” 
 When we do not pay dividends in full (or do not set apart a sum sufficient to pay them in full) on the convertible preferred stock and
the shares of any other class or series of capital stock ranking, as to dividends, on parity with the convertible preferred stock, we will declare any dividends upon the convertible preferred stock and each such other class or series of capital
stock ranking, as to dividends, on parity with the convertible preferred stock pro rata, so that the amount of dividends declared per share of the convertible preferred stock and such other class or series of capital stock will in all cases bear to
each other the same ratio that accumulated and unpaid dividends per share on the convertible preferred stock and such other class or series of capital stock (which will not include any accumulation in respect of unpaid dividends on such other class
or series of capital stock for prior dividend periods if such other class or series of capital stock does not have a cumulative dividend) bear to each other. 

Any accumulated and unpaid dividends will accumulate additional dividends at the then-current dividend rate until paid, compounded quarterly, to, but
excluding, the payment date. We refer to these additional dividends that accumulate on accumulated and unpaid dividends as “compounded dividends” and the payments in respect thereof as “compounded dividend payments.” 

 Holders of shares of the convertible preferred stock are not entitled to any dividends in excess of the full
cumulative dividends (including compounded dividends) on the convertible preferred stock as described above. Any dividend payment made on the convertible preferred stock will first be credited against the earliest accumulated but unpaid dividends
due with respect to those shares which remain payable. 
 No dividend will be paid unless and until our board of directors, or an authorized committee of
our board of directors, declares a dividend payable with respect to the convertible preferred stock. Our ability to declare and pay dividends and make other distributions with respect to our capital stock, including the convertible preferred stock,
may be limited by the terms of any indentures, loan agreements or other financing arrangements that we enter into in the future. In addition, our ability to declare and pay dividends may be limited by applicable Virginia law. Notwithstanding the
foregoing, except in the case of a dividend deficiency event, all accumulated and unpaid dividends (including compounded dividends thereon), whether or not declared, will be paid on the purchase contract settlement date, whether or not there is a
successful remarketing to the holders of the shares of convertible preferred stock as of the record date immediately preceding the purchase contract settlement date. If a dividend deficiency event occurs, following the final remarketing
(whether successful or failed), we shall have no obligation to pay the then accumulated but unpaid dividends on the convertible preferred stock on the purchase contract settlement date to the holders of the shares of convertible preferred stock as
of the record date immediately preceding the purchase contract settlement date. However, the right to receive such accumulated but unpaid dividends (including compounded dividends thereon) shall continue to exist (and shall continue to
compound) with respect to such convertible preferred stock notwithstanding such remarketing, and such dividends shall be payable to the holders of such convertible preferred stock as of the record date for the dividend payment date on which such
dividends are subsequently declared and paid (if ever). 
 Method of Payment of Dividends 

Subject to the limitations described below, we may pay any dividend (or any portion of any dividend) on the convertible preferred stock (whether or not for a
current dividend period or any prior dividend period), determined in the sole discretion of our board of directors, or an authorized committee thereof: 
  

	 	•	 	 in cash; 

  

	 	•	 	 by delivery of shares of our common stock; or 

 

	 	•	 	 through any combination of cash and shares of our common stock. 

We will make each payment of a dividend on the convertible preferred stock in cash, except to the extent we elect to make all or any portion of such payment
in shares of our common stock. We will give the holders of the convertible preferred stock notice of any such election and the portion of such payment that will be made in cash and the portion that will be made in common stock no later than eight
scheduled trading days prior to the dividend payment date for such dividend. 
 If we elect to make any such payment of a dividend, or any portion thereof,
in shares of our common stock, such shares shall be valued for such purpose at the applicable five-day average price, multiplied by 97%. 

No fractional shares of common stock will be delivered to the holders of the convertible preferred stock in respect of dividends. We will instead pay a cash
adjustment to each holder that would otherwise be entitled to a fraction of a share of common stock based on (i) the five-day average price and (ii) the aggregate number of shares of
convertible preferred stock held by such holder (or, if the convertible preferred stock is held in global book-entry form, based on the applicable procedures of the depositary for determining such number of shares). 

To the extent a shelf registration statement is required in our reasonable judgment in connection with the issuance of or for resales of common stock issued
as payment of a dividend, we will, to the extent such a registration statement is not currently filed and effective, use our reasonable best efforts to file and maintain the effectiveness of such a shelf registration statement until the earlier of
such time as all such shares of common stock have been resold thereunder and such time as all such shares are freely tradable under Rule 144 by non-affiliates of ours without registration. To the
extent applicable, we will also use our reasonable best efforts to have the shares of common stock qualified or registered under applicable state securities laws, if required, and approved for listing on the New York Stock Exchange (or if our
common stock is not listed on the New York Stock Exchange, on the principal other U.S. national or regional securities exchange on which our common stock is then listed). 

 Any dividends paid in shares of our common stock will be subject to the listing standards of the New York
Stock Exchange, if applicable. 
 Liquidation Preference 

Upon any voluntary or involuntary liquidation, dissolution or winding up of our affairs, before any distribution or payment shall be made to holders of shares
of our common stock or any other class or series of capital stock ranking, as to rights upon any voluntary or involuntary liquidation, dissolution or winding up of our affairs, junior to the convertible preferred stock, holders of shares of the
convertible preferred stock are entitled to be paid out of our assets legally available for distribution to our stockholders, after payment of or provision for our debts and other liabilities, a liquidation preference of $1,000 per share of the
convertible preferred stock, plus an amount equal to any accumulated and unpaid dividends (whether or not authorized or declared) up to but excluding the date of payment, but subject to the prior payment in full of all our
liabilities and the payment of our senior stock. If, upon our voluntary or involuntary liquidation, dissolution or winding up, our available assets are insufficient to pay the full amount of the liquidating distributions on all outstanding shares of
the convertible preferred stock and the corresponding amounts payable on all shares of each other class or series of capital stock ranking, as to liquidation rights, on parity with the convertible preferred stock in the distribution of assets, then
holders of shares of the convertible preferred stock and each such other class or series of capital stock ranking, as to voluntary or involuntary liquidation rights, on parity with the convertible preferred stock will share ratably in any
distribution of assets in proportion to the full liquidating distributions to which they would otherwise be respectively entitled. 
 Holders of shares of
the convertible preferred stock will be entitled to written notice of any event triggering the right to receive a distribution in connection with any voluntary or involuntary liquidation, dissolution or winding up of our affairs. After payment of
the full amount of the liquidating distributions to which they are entitled, holders of shares of the convertible preferred stock will have no right or claim to any of our remaining assets. Our consolidation or merger with or into any other
corporation, trust or other entity, or the voluntary sale, lease, transfer or conveyance of all or substantially all of our property or business, will not be deemed to constitute a liquidation, dissolution or winding up of our affairs. 

No Maturity 
 The convertible preferred stock has no
maturity date, but we are permitted to redeem the convertible preferred stock as described under “—Optional Redemption.” Accordingly, the convertible preferred stock will remain outstanding indefinitely unless a holder of shares of
the convertible preferred stock decides, subject to satisfaction of the conditions described herein, to convert it, or we elect to redeem it. See “—Conversion Rights,” and “—Optional Redemption” below. 

Optional Redemption 
 We do not have the right to redeem
any shares of the convertible preferred stock before September 1, 2022. On or after September 1, 2022, we will have the option to redeem some or all the shares of the convertible preferred stock at a redemption price equal to 100% of the
liquidation preference per share, plus any accumulated and unpaid dividends, if any (whether or not declared) to, but excluding, the redemption date. The redemption price will be paid solely in cash. 

In the event of a redemption, we will request that the depositary notify its participants holding convertible preferred stock or, if the convertible preferred
stock is in certificated form, send a written notice by first class mail to each holder of record of the convertible preferred stock at such holders registered address, not fewer than 25 scheduled trading days nor more than 90 calendar days prior to
the redemption date, stating, among other things, the redemption price and the settlement method of the convertible preferred stock if the holder elects to convert. In addition, we will (i) issue a press release containing such information and
(ii) publish such information on our website. In no event will we give any notice of redemption prior to the earlier of a remarketing settlement date and the purchase contract settlement date. 

 If we give notice of redemption, then, by 12:00 p.m., New York City time, on the redemption date, to the
extent funds are legally available, we shall, with respect to: 
  

	 	•	 	 shares of the convertible preferred stock held by DTC or its nominees, deposit or cause to be deposited,
irrevocably with DTC cash sufficient to pay the redemption price and will give DTC irrevocable instructions and authority to pay the redemption price to holders of such shares of the convertible preferred stock; and 

 

	 	•	 	 shares of the convertible preferred stock held in certificated form, deposit or cause to be deposited,
irrevocably with the paying agent cash sufficient to pay the redemption price and will give the paying agent irrevocable instructions and authority to pay the redemption price to holders of such shares of the convertible preferred stock upon
surrender to the paying agent of their certificates evidencing their shares of the convertible preferred stock. 

 If on the redemption
date DTC or the paying agent holds cash sufficient to pay the redemption price for the shares of the convertible preferred stock delivered for redemption in accordance with the terms of the certificate of designations, dividends will cease to
accumulate on those shares of the convertible preferred stock called for redemption and all rights of holders of such shares will terminate except for the right to receive the redemption price. Payment of the redemption price for the shares of the
convertible preferred stock is conditioned upon book-entry transfer of or physical delivery of certificates representing the convertible preferred stock, together with necessary endorsements, to the paying agent, or to the paying agent’s
account at DTC, at any time after delivery of the redemption notice. Payment of the redemption price for the convertible preferred stock will be made (i) if book-entry transfer of or physical delivery of the convertible preferred stock has been
made by or on the redemption date, on the redemption date, or (ii) if book-entry transfer of or physical delivery of the convertible preferred stock has not been made by or on such date, at the time of book-entry transfer of or physical
delivery of the convertible preferred stock. 
 If the redemption date falls after a dividend payment record date and before the related dividend payment
date, holders of the shares of convertible preferred stock at the close of business on that dividend payment record date will be entitled to receive the full dividend payable on those shares on the corresponding dividend payment date. The redemption
price payable on such redemption date will include only the liquidation preference, but will not include any amount in respect of dividends declared and payable on such corresponding dividend payment date. 

In the case of any partial redemption, we will select the shares of convertible preferred stock to be redeemed on a pro rata basis, by lot or any other method
that we, in our discretion, deem fair and appropriate. 
 We do not have the right to authorize, issue a press release or give notice of redemption unless
(a) we have funds legally available for the payment of the aggregate redemption price and (b) prior to giving the notice, (i) all accumulated and unpaid dividends on the convertible preferred stock (whether or not declared) for
dividend periods ended prior to the date of such notice of redemption shall have been or contemporaneously are declared and paid and (ii) if the redemption date occurs following a record date and prior to the related dividend payment date, a
cash dividend for the related dividend period has been declared and sufficient funds have been set aside for payment of such dividend. 
 Limited Voting
Rights 
 Holders of shares of the convertible preferred stock generally do not have any voting rights, except as set forth below and as required by law.
In matters where holders of the convertible preferred stock are entitled to vote, each share of the convertible preferred stock shall be entitled to one vote. 

Preferred Stock Directors 
 If at any time
dividends on the convertible preferred stock have not been declared and paid in full for six or more dividend periods, whether or not consecutive (which we refer to as a “preferred dividend default”), holders of shares of the convertible
preferred stock (voting together as a class with the holders of all other classes or series of preferred stock upon which like voting rights have been conferred and are exercisable (and with voting rights allocated pro rata based on
the liquidation preference of the convertible preferred stock and each such other class or series of preferred stock)) will be entitled to vote for the election of two additional directors to serve on our board of directors (which we refer to as
“preferred stock directors”), until all accumulated unpaid dividends with respect to the convertible preferred stock and any other class or series of preferred stock upon which like voting rights have been conferred and are exercisable
have been paid or declared and a sum sufficient for payment is set aside for such payment. In such a case, the number of directors serving on our board of directors will be increased by two. The preferred stock directors will be elected by a
plurality of the votes cast in the election to serve until the next annual meeting and each preferred stock director will serve until his successor is duly elected and qualifies or until the director’s right to hold the office terminates,
whichever occurs earlier. The election will take place at: 

	 	•	 	 a special meeting called by holders of at least 10% of the outstanding shares of the convertible preferred stock
together with any other class or series of preferred stock upon which like voting rights have been conferred and are exercisable, if this request is received more than 90 calendar days before the date fixed for our next annual or special meeting of
stockholders or, if we receive the request for a special meeting within 90 calendar days before the date fixed for our next annual or special meeting of stockholders, at our annual or special meeting of stockholders; and 

 

	 	•	 	 each subsequent annual meeting (or special meeting held in its place) until all accumulated dividends on the
convertible preferred stock and on any other class or series of preferred upon which like voting rights have been conferred and are exercisable have been paid in full for all past dividend periods and the dividend for the then current dividend
period shall have been fully paid or declared and a sum sufficient for the payment thereof set aside for payment. 

 If and when all
accumulated dividends on the convertible preferred stock and all other classes or series of preferred stock upon which like voting rights have been conferred and are exercisable shall have been paid in full or a sum sufficient for such payment
in full is set aside for payment, holders of shares of the convertible preferred stock shall be divested of the voting rights set forth above (subject to re-vesting in the event of any subsequent
preferred dividend defaults) and the term of office of such preferred stock directors so elected will terminate and the entire board of directors will be reduced accordingly. Each preferred stock director shall be entitled to one vote on any matter.

 When a Supermajority Vote is Required 
 So
long as any shares of the convertible preferred stock remain outstanding, we will not, without the consent or the affirmative vote of the holders of at least two-thirds of the outstanding shares of
the convertible preferred stock together with each other class or series of preferred stock ranking on parity with the convertible preferred stock with respect to the payment of dividends and the distribution of assets upon our liquidation,
dissolution or winding up and upon which like voting rights have been conferred (voting as a single class): 
  

	 	•	 	 authorize, create or issue, or increase the number of authorized or issued shares of, any class or series of
stock ranking senior to the convertible preferred stock with respect to payment of dividends, or the distribution of assets upon the liquidation, dissolution or winding up of our affairs, or reclassify any of our authorized capital stock into any
such shares, or create, authorize or issue any obligation or security convertible into or evidencing the right to purchase any such shares; 

  

	 	•	 	 amend, alter or repeal the provisions of our articles of incorporation so as to materially and adversely affect
any right, preference, privilege or voting power of the convertible preferred stock; or 

  

	 	•	 	 consummate a binding share exchange or reclassification involving the shares of convertible preferred stock or a
merger or consolidation of us with another entity, unless either (i) the shares of convertible preferred stock remain outstanding and have rights, preferences, privileges and voting powers, taken as a whole, that are no less favorable to the
holders thereof than the rights, preferences, privileges and voting powers of the convertible preferred stock immediately prior to such consummation, taken as a whole, or (ii) in the case of any such merger or consolidation with respect to
which we are not the surviving or resulting entity, the shares of convertible preferred stock are converted into or exchanged for preference securities of the surviving or resulting entity or its ultimate parent, such surviving or resulting entity
or ultimate parent is organized under the laws of the United States, any state thereof or the District of Columbia and treated as a corporation for U.S. federal income tax purposes, and such preference securities have rights, preferences, privileges
and voting powers, taken as a whole, that are no less favorable to the holders thereof than the rights, preferences, privileges and voting powers of the convertible preferred stock immediately prior to such consummation, taken as a whole;

 provided that the creation and issuance, or an increase in the authorized or issued amount, whether pursuant to pre-emptive or similar rights or otherwise, of any series of preferred stock (including the convertible preferred stock), ranking equally with and/or junior to the convertible preferred stock with
respect to the payment of dividends (whether such dividends are cumulative or non-cumulative) and the distribution of assets upon our liquidation, dissolution
and winding-up, shall not be deemed to adversely affect the rights, preferences, privileges or voting powers of the convertible preferred stock, and shall not require the affirmative vote or consent
of the holders of the convertible preferred stock. 

 If any amendment, alteration, repeal, share exchange, reclassification, merger or consolidation specified
above would adversely affect one or more but not all series of parity stock (including the convertible preferred stock for this purpose), then only the one or more series of parity stock adversely affected and entitled to vote, rather than all
series of parity stock, shall vote as a class. 
 Without the consent of the holders of the convertible preferred stock, so long as such action does not
adversely affect the special rights, preferences, privileges or voting powers of the convertible preferred stock, and limitations and restrictions thereof, we may amend, alter, supplement, or repeal any terms of the convertible preferred stock
for the following purposes: 
  

	 	•	 	 to cure any ambiguity or mistake, or to correct or supplement any provision contained in the preferred stock
articles of amendment that may be defective or inconsistent with any other provision contained in such preferred stock articles of amendment; 

  

	 	•	 	 to make any provision with respect to matters or questions relating to the convertible preferred stock that is
not inconsistent with the provisions of the preferred stock articles of amendment; 

  

	 	•	 	 to waive any of our rights with respect thereto; or 

 

	 	•	 	 make any other change to the terms of the convertible preferred stock; 

provided that any such amendment, alteration, supplement or repeal of any terms of the convertible preferred stock effected in order to
(1) conform the terms thereof to the description of the terms of the convertible preferred stock set forth under “Description of the Convertible Preferred Stock” in the preliminary prospectus supplement filed by us with the Securities
and Exchange Commission on June 10, 2019 as supplemented and/or amended by the related pricing term sheet or (2) implement the changes under “—Increased Dividend Rate and Increased Conversion Rate”, as the case may be, shall
be deemed not to adversely affect the special rights, preferences, privileges and voting powers, and limitations and restrictions thereof, of the convertible preferred stock. 

Holders of shares of the convertible preferred stock will not be entitled to vote with respect to any increase in the total number of authorized shares of our
common stock or preferred stock, any increase in the number of authorized shares of the convertible preferred stock or the creation or issuance of any other class or series of capital stock, or any increase in the number of authorized shares of any
other class or series of capital stock, in each case, ranking on parity with or junior to the convertible preferred stock with respect to the payment of dividends and the distribution of assets upon liquidation, dissolution or winding up, except as
set forth above. 
 Holders of shares of the convertible preferred stock will not have any voting rights with respect to, and the consent of the holders of
shares of the convertible preferred stock is not required for, the taking of any corporate action, including any merger or consolidation involving us or a sale of all or substantially all of our assets, regardless of the effect that such merger,
consolidation or sale may have upon the powers, preferences, voting power or other rights or privileges of the convertible preferred stock, except as set forth above. 

In addition, the voting provisions above will not apply if, at or prior to the time when the act with respect to which the vote would otherwise be required
would occur, we have redeemed upon proper procedures all outstanding shares of the convertible preferred stock. 
 Conversion Rights 

General 
 Holders of Corporate Units do not have the
right to convert their ownership interests in the convertible preferred stock that are a part of such Corporate Units. Only shares of convertible preferred stock that are not a part of Corporate Units may be so converted. Holders of such separate
shares of convertible preferred stock that are not a part of Corporate Units may convert their shares into common stock (or cash or a combination of cash and common stock, at our election) at their option prior to June 1, 2022 only upon the
occurrence of a fundamental change. In order for a holder of Corporate Units to separate their convertible preferred stock from the purchase contracts in order to convert the convertible preferred stock following a fundamental change, the holder
must either (1) create Treasury Units or 

 (2) settle the related purchase contracts early with separate cash, as described under
“Description of the Purchase Contracts—Early Settlement Upon a Fundamental Change” above. If a fundamental change occurs, holders of separate shares of convertible preferred stock can convert such shares at any time from or after the
effective date of such transaction until the related fundamental change conversion deadline (as defined below). 
 On and after June 1, 2022, holders
of shares of the convertible preferred stock may, at their option, at any time and from time to time, convert some or all of their outstanding shares of the convertible preferred stock. 

The conversion rate will initially be 11.2750 shares of our common stock per share of convertible preferred stock, which is equivalent to an initial
conversion price of approximately $88.69 per share of our common stock. Upon conversion of the convertible preferred stock, we will settle our obligations in the manner set forth under “—Settlement Upon Conversion.” 

Upon settlement of a conversion of the convertible preferred stock and except as set forth in the immediately succeeding paragraph, a holder will not receive
payment of accumulated and unpaid dividends as described under “—Dividends” and we will not make any payments in respect of or adjust the conversion rate to account for accumulated and unpaid dividends to the conversion date except as
provided under “—Adjusted Conversion Rate Upon a Fundamental Change.” 
 If a holder of shares of convertible preferred stock exercises its
conversion rights, on and after the conversion date, those shares will cease to accumulate dividends as of the end of the day immediately preceding the date of conversion. A holder of shares of convertible preferred stock on the record date for the
payment of a dividend will receive that dividend notwithstanding a conversion of the convertible preferred stock following such record date to the dividend payment date. However, convertible preferred stock surrendered for conversion after the close
of business on any record date for the payment of dividends declared and before the opening of business on the dividend payment date relating to that record date must be accompanied by a payment in cash of an amount equal to the dividend payable in
respect of those shares for the dividend period in which the shares are converted; provided that no such payment need be made: 
  

	 	•	 	 if we have specified a redemption date that is after a dividend payment record date and on or prior to the
corresponding dividend payment date; or 

  

	 	•	 	 if we have specified a fundamental change conversion deadline that is after a dividend payment record date and on
or prior to the corresponding dividend payment date. 

 In case any shares of convertible preferred stock are to be redeemed, the right to
convert those shares of the convertible preferred stock will terminate at 5:00 p.m., New York City time, on the business day immediately preceding the redemption date unless we default in the payment of the redemption price of those shares. 

Adjusted Conversion Rate Upon a Fundamental Change 

If a fundamental change (as defined in “Description of the Purchase Contracts—Early Settlement Upon a Fundamental Change” above) occurs, a
holder may elect to convert separate shares of convertible preferred stock in connection with the fundamental change (the right of conversion, “fundamental change conversion right”). If the stock price (as defined in “Description of
the Purchase Contracts—Early Settlement Upon a Fundamental Change—Calculation of Make-Whole Shares” above) is less than $88.69 (which we refer to as the “conversion price,” and which initially equals the conversion price of
the convertible preferred stock), any such conversion in connection with the fundamental change will be at an adjusted conversion rate that will be equal to the $1,000 liquidation preference plus all accumulated and unpaid dividends to, but
excluding the fundamental change settlement date described below (unless the conversion date for a share of convertible preferred stock occurs after the record date for the payment of declared dividends and prior to the related dividend payment
date, in which case the conversion rate calculation for such share will not include accumulated and unpaid dividends that will be paid to holders of record on such record date) divided by the average of the closing prices of our
common stock for the five consecutive trading days ending on the second business day prior to the fundamental change settlement date (or, in the case of a fundamental change described in clause (ii) of the definition of fundamental change where
the holders of our common stock receive only cash in the fundamental change, the cash amount paid per share of our common stock) (the “fundamental change settlement price”). Notwithstanding the foregoing, in no event will the conversion
rate exceed 27.0599 shares of common stock per share of convertible preferred stock (subject to adjustment as set forth under “—Conversion Rate Adjustments” and increase as set forth under “—Increased Dividend Rate and
Increased Conversion Rate”), which is equal to the $1,000 liquidation preference divided by 50% of the reference price. 

 The reference price will be adjusted as of any date on which the conversion rate of the convertible
preferred stock is adjusted. The adjusted reference price will equal the reference price applicable immediately prior to such adjustment multiplied by a fraction, the numerator of which is the conversion rate immediately prior to
the adjustment giving rise to the stock price adjustment and the denominator of which is the conversion rate as so adjusted. The conversion price as of any time is equal to $1,000 divided by the conversion rate as of such time. 

A conversion of the convertible preferred stock will be deemed for these purposes to be “in connection with” such a fundamental change (regardless
of the stock price) if the conversion date occurs from, and including, the effective date of such fundamental change to, and including, the date we specified in the fundamental change company notice as the last date on which a holder of the
convertible preferred stock may exercise the fundamental change conversion right for that fundamental change, which we refer to as the “fundamental change conversion deadline.” The fundamental change conversion deadline will be a date no
less than 20 business days nor more than 35 business days after the effective date of such fundamental change; provided that if any purchase contracts are outstanding at the time we give the fundamental change company notice, such
date shall not be less than 10 business days following the fundamental change early settlement date we specify for the purchase contracts as described under “Description of the Purchase Contracts—Early Settlement Upon a Fundamental
Change.” 
 We will send a notice to holders of the convertible preferred stock of a fundamental change within five business days after the effective
date of the fundamental change (the “fundamental change company notice”). Such fundamental change company notice will state: 
  

	 	•	 	 the events constituting the fundamental change; 

 

	 	•	 	 the effective date of the fundamental change; 

 

	 	•	 	 the name and address of the paying agent and the conversion agent; 

 

	 	•	 	 the conversion rate and any adjustment to the conversion rate that will result from the fundamental change, or if
the stock price is less than the conversion price, the formula for determination of the conversion rate; 

  

	 	•	 	 the procedures that the holder of the convertible preferred stock must follow to exercise the fundamental change
conversion right; 

  

	 	•	 	 the fundamental change conversion deadline; 

 

	 	•	 	 the settlement method for all conversions in exercise of the fundamental change conversion right, including, in
the case of combination settlement, the amount of cash per share of convertible preferred stock we will pay in settlement of any such conversions; and 

  

	 	•	 	 if the stock price is less than the conversion price, the date on which all conversions in exercise of the
fundamental change conversion right will be settled (the “fundamental change settlement date”), which will be the second business day immediately following the fundamental change conversion deadline. 

To exercise the fundamental change conversion right, a holder of a separate share of convertible preferred stock must deliver, on or before the close of
business on the fundamental change conversion deadline, the convertible preferred stock to be converted, duly endorsed for transfer, together with a written conversion notice completed, to our conversion agent. The conversion notice will state: 

 

	 	•	 	 the relevant fundamental change conversion date; and 

 

	 	•	 	 the number of shares of the convertible preferred stock to be converted pursuant to the fundamental change
conversion right. 

 If the convertible preferred stock is held in global form, the conversion notice must comply with applicable DTC
procedures. 
 If the stock price is greater than or equal to the conversion price, the convertible preferred stock as to which the fundamental change
conversion right has been properly exercised will be converted into cash, shares of our common stock or a combination thereof at our election in accordance with “— Settlement Upon Conversion” below. If the stock price is less than the
conversion price, then notwithstanding anything herein to the contrary, we can elect to settle conversions in connection with a valid exercise of the fundamental change conversion right through cash settlement, combination settlement or physical
settlement, as follows: 
  

	 	•	 	 any such conversions will settle on the fundamental change settlement date; 

	 	•	 	 if we have validly elected physical settlement, we will deliver, in respect of each share of the convertible
preferred stock, a number of shares of common stock (and cash in lieu of any fractional shares) equal to the conversion rate described above; 

  

	 	•	 	 if we have validly elected cash settlement, we will deliver an amount of cash per share of convertible preferred
stock equal to the conversion rate described above multiplied by the fundamental change settlement price; and 

  

	 	•	 	 if we have validly elected combination settlement, we will deliver, in addition to the amount of cash per share
of convertible preferred stock specified in the fundamental change company notice, a number of shares of common stock (and cash in lieu of any fractional shares) equal to a fraction, the numerator of which is (i) the conversion rate described
above multiplied by the fundamental change settlement price minus (ii) the amount of cash per share specified in the fundamental change company notice, and the denominator of which is the fundamental change
settlement price. 

 If the holders of our common stock receive only cash in a reorganization event, then notwithstanding the foregoing,
for all conversions in connection with a fundamental change that occur after the effective date of such transaction where the relevant stock price is less than the conversion price, the consideration due upon conversion of each such share of
convertible preferred stock shall be solely cash in an amount equal to the conversion rate as modified by this “—Adjusted Conversion Rate Upon a Fundamental Change,” multiplied by the fundamental change settlement
price for such transaction. 
 We will, to the extent applicable, comply with listing standards of the New York Stock Exchange in connection with the
issuance of our common stock upon any exercise of the fundamental change conversion right. 
 Conversion Procedures 

Holders of shares of the convertible preferred stock represented by a beneficial interest in a global security may convert their shares by complying with the
depositary’s procedures and, if required, by paying any dividends as described in this prospectus supplement. Holders of shares of the convertible preferred stock in certificated form may convert some or all of their shares by surrendering to
us at our principal office or at the office of our conversion agent, as may be designated by our board of directors or a committee of our board of directors, the certificate or certificates, if any, for the shares of the convertible preferred stock
to be converted, accompanied by a written notice stating that the holder of shares of the convertible preferred stock elects to convert all or a specified whole number of those shares in accordance with the provisions described in this prospectus
supplement and specifying the name or names in which the holder of shares of the convertible preferred stock wishes the certificate or certificates, if any, for the shares of our common stock to be issued. If the notice specifies a name or
names other than the name of the holder of shares of the convertible preferred stock, the notice will be accompanied by payment of all transfer taxes payable upon the issuance of shares of our common stock in that name or names. Other than such
transfer taxes, we will pay any documentary, stamp or similar issue or transfer taxes that may be payable in respect of any issuance or delivery of shares of our common stock upon conversion of shares of the convertible preferred stock. The date on
which the foregoing procedures have been complied with will be deemed the “conversion date” with respect to a share of the convertible preferred stock. 

As promptly as practicable after the conversion date with respect to any shares of the convertible preferred stock, we will reflect in our stock records the
cancellation of the convertible preferred stock that is being converted and the issuance of such number of validly issued, fully paid and non-assessable shares of our common stock to which the
holders of such shares of the convertible preferred stock are entitled as a result of the conversion, if any, as of such conversion date (in the case of any physical settlement) or the final day of the observation period (in the case of a
combination settlement). In addition, if the common stock to be issued upon conversion is certificated, promptly after the issuance of the common stock certificate (or, if the convertible preferred stock is certificated, promptly after, and in any
case, no later than (x) two business days after the surrender of the certificates representing the shares that are converted (in the case of physical settlement) and (y) two business days after the later of the surrender of the
certificates representing the shares that are converted and the final day of the observation period (in the case of 

 
combination settlement)) we will deliver or cause to be delivered (i) certificates representing the number of validly issued, fully paid
and non-assessable shares of our common stock to which the holders of such shares of the convertible preferred stock, or the transferee of the holder of such shares of the convertible preferred
stock, will be entitled and (ii) if the convertible preferred stock is then certificated and if less than the full number of shares of the convertible preferred stock represented by the surrendered certificate or certificates, if any, or
specified in the notice, are being converted, a new certificate or certificates, of like tenor, for the number of shares represented by the surrendered certificate or certificates, less the number of shares being converted. This conversion will be
deemed to have been made at the close of business on the conversion date so that the rights of the holder of shares of the convertible preferred stock as to the shares being converted will cease, except for the right to receive the shares of our
common stock. 
 Holders of shares of the convertible preferred stock are not eligible to exercise any rights of a holder of shares of our common stock
until they have converted their shares of the convertible preferred stock into shares of our common stock, if any. If more than one share of the convertible preferred stock is surrendered for conversion by the same stockholder at the same time, the
number of whole shares of our common stock issuable upon conversion of those shares of the convertible preferred stock will be computed on the basis of the total number of shares of the convertible preferred stock so surrendered. 

We will at all times reserve and keep available, free from preemptive rights, out of our authorized but unissued shares of capital stock, for issuance upon
the conversion of shares of the convertible preferred stock, a number of authorized but unissued shares of our common stock that will from time to time be sufficient to permit the conversion of all outstanding shares of the convertible preferred
stock (assuming, for such purposes, that physical settlement is applicable to all conversions). 
 Before the delivery of any securities upon conversion of
shares of the convertible preferred stock, we will comply with all applicable federal and state laws and regulations. All shares of our common stock delivered upon conversion of shares of the convertible preferred stock, if any, will, upon delivery,
be duly and validly issued, fully paid and non-assessable, free of all liens and charges and not subject to any preemptive rights. 

Settlement Upon Conversion 
 To satisfy our
obligations upon a conversion, we may elect to pay or deliver, as the case may be, solely shares of our common stock, together with cash in lieu of fractional shares (“physical settlement”), solely cash (“cash settlement”) or a
combination of cash and our common stock (“combination settlement”). We refer to each of these elections as a “settlement method.” 
 We
will use the same settlement method for all conversions with the same conversion date, but we will not have any obligation to use the same settlement method with respect to conversions occurring on different conversion dates, except that we will use
the same settlement method for (x) all conversions following our delivery of a notice of redemption to holders of the convertible preferred stock to, and including, the related redemption date, regardless of the conversion date and (y) all
conversions in connection with a fundamental change. If we elect a settlement method, we will inform holders so converting through the conversion agent of such settlement method we have selected no later than the second business day immediately
following the related conversion date; provided that (x) in the case of any conversions of convertible preferred stock called for redemption, we will elect our settlement method in the redemption notice and (y) in the case
of a conversion in connection with a fundamental change, we will elect our settlement method in the fundamental change company notice. If we elect combination settlement, but we do not timely notify converting holders of the specified dollar amount
per $1,000 liquidation preference of convertible preferred stock, such specified dollar amount will be deemed to be $1,000. If we do not timely provide notice electing a settlement method in respect of any conversion of the convertible preferred
stock, we will be deemed to have elected combination settlement and the specified dollar amount per $1,000 liquidation preference of convertible preferred stock will be equal to $1,000. 

Settlement amounts will be computed as follows: 
  

	 	•	 	 if we elect physical settlement, we will deliver to the converting holder a number of shares of our common stock
equal to the number of shares of convertible preferred stock to be converted multiplied by the applicable conversion rate; 

	 	•	 	 if we elect cash settlement, we will deliver to the converting holder, in respect of each $1,000 liquidation
preference of the convertible preferred stock being converted, cash in an amount equal to the sum of the daily conversion values for each of the 20 consecutive trading days during the related observation period; and 

 

	 	•	 	 if we elect combination settlement, we will deliver to the converting holder in respect of each $1,000
liquidation preference of the convertible preferred stock being converted a “settlement amount” equal to the sum of the daily settlement amounts for each of the 20 consecutive trading days during the related observation period.

 The “daily settlement amount,” for each of the 20 consecutive trading days during the observation period, will consist of:

  

	 	•	 	 cash equal to the lesser of (i) a dollar amount per share of the convertible preferred stock to be received
upon conversion as specified by us in the notice regarding our chosen settlement method (the “specified dollar amount”), if any, divided by 20 (such quotient being referred to as the “daily measurement value”)
and (ii) the daily conversion value for such trading day; and 

  

	 	•	 	 to the extent the daily conversion value for such trading day exceeds the daily measurement value, a number of
shares equal to (i) the difference between such daily conversion value and the daily measurement value, divided by (ii) the daily VWAP for such trading day. 

“Daily conversion value” means, for each of the 20 consecutive trading days during the observation
period, one-twentieth of the product of (i) the applicable conversion rate and (ii) the daily VWAP of our common stock on such trading day. 

“Observation period” means, with respect to any share of convertible preferred stock being converted, the 20 consecutive trading day period
beginning on and including the third trading day after the conversion date for such share of convertible preferred stock, provided that if the relevant conversion date occurs on or after the date of our issuance of a notice of
redemption with respect to the convertible preferred stock as described under “—Redemption” and prior to the relevant redemption date, the observation period shall be the 20 consecutive trading days beginning on, and including, the
21st scheduled trading day immediately preceding such redemption date. 
 If we elect physical settlement in respect of a conversion, we will deliver the
settlement amount to converting holders on the second trading day following the conversion date, but such holders will be deemed to be the owners of the shares of our common stock included in the settlement amount as of the close of business
on the conversion date. If we elect cash settlement or combination settlement, we will pay or deliver, as the case may be, the settlement amount to converting holders on the second trading day following the final trading day of the relevant
observation period and such holders will be deemed to be the owners of any of the shares of our common stock included in the settlement amount on the last trading day of the relevant observation period. 

We will not issue fractional shares upon conversion of the convertible preferred stock. Instead, we will pay cash in lieu of fractional shares based on the
daily VWAP of our common stock on the relevant conversion date (in the case of physical settlement) or based on the daily VWAP of our common stock on the last trading day of the relevant observation period (in the case of combination settlement).

 Recapitalizations, Reclassifications and Changes of Our Common Stock 

In the case of any reorganization event, at and after the effective time of such reorganization event, the conversion rate shall be determined by reference to
the value of an exchange property unit, and we will deliver, upon settlement of any conversion of convertible preferred stock, a number of exchange property units equal to the number of shares of our common stock that we would otherwise be required
to deliver. However, at and after the effective time of the reorganization event, (i) we will continue to have the right to determine the form of consideration to be paid or delivered, as the case may be, upon conversion, as set forth under
“—Conversion Rights—Settlement Upon Conversion” and (ii)(x) any amount payable in cash upon conversion as set forth under “—Conversion Rights—Settlement Upon Conversion” will continue to be payable in cash,
(y) any shares of our common stock that we would have been required to deliver upon conversion as set forth under “—Conversion Rights—Settlement Upon Conversion” will instead be deliverable in the amount and type of exchange
property that a holder of that number of shares of our common stock would have received in such transaction and (z) the daily VWAP and fundamental change 

 
settlement price will be calculated based on the value of an exchange property unit that a holder of one share of our common stock would have received in such transaction. In the event holders of
our common stock (other than any constituent person or affiliate thereof) have the opportunity to elect the form of consideration to be received in such transaction, the exchange property unit that holders of the convertible preferred stock are
entitled to receive will be deemed to be the weighted average of the types and amounts of consideration actually received by the holders of our common stock. We will notify holders of the weighted average as soon as practicable after such
determination is made. If the holders receive only cash in such transaction, then notwithstanding anything herein to the contrary for all conversions that occur after the effective date of such transaction (other than conversions in connection with
a fundamental change where the relevant stock price is less than the conversion price) (i) the consideration due upon conversion of each share of convertible preferred stock shall be solely cash in an amount equal to the conversion rate in
effect on the conversion date, multiplied by the price paid per share of common stock in such transaction and (ii) we will satisfy our conversion obligation by paying cash to converting holders on the second scheduled trading
day immediately following the conversion date. In addition, we will amend the articles of incorporation (1) to provide for anti-dilution and other adjustments that are as nearly equivalent as possible to the adjustments described under
“—Conversion Rate Adjustments” below, (2) in the case of any transaction that results in the common equity of any entity other than us (or, for the avoidance of doubt, our successor in such transaction) being included as exchange
property, (a) by replacing references to “us” or “our” (and similar references) in the definitions of “fundamental change” with references to that other entity and (b) by causing the dividend blocker
provisions to apply to that other entity, with its equity securities being deemed stock ranking junior to the convertible preferred stock for this purpose and (3) to include such additional provisions to protect the interests of the holders of
convertible preferred stock as our board of directors reasonably considers necessary by reason of the foregoing. We will not become party to any such transaction unless its terms are consistent with the foregoing. 

In connection with any adjustment to the conversion rate described below, we will also adjust the initial dividend threshold (as defined under
“—Conversion Rate Adjustments”) based on the number of shares of common stock comprising the exchange property and (if applicable) the value of any non-stock consideration comprising
the exchange property. If the exchange property is composed solely of non-stock consideration, the initial dividend threshold will be zero. 

The provisions described in the preceding two paragraphs shall similarly apply to successive reorganization events. 

Conversion Rate Adjustments 
 The applicable conversion
rate shall be adjusted from time to time for any of the following events that occur following the original issue date of the convertible preferred stock: 
  

	 	(1)	 If we issue common stock as a dividend or distribution on our common stock to all or substantially all holders
of our common stock, or if we effect a share split or share combination, the conversion rate will be adjusted based on the following formula: 

 

			
	CR1 = CR0 ×	  	OS1
	  	OS0

  

	 	where:	 

CR0 = the conversion rate in effect immediately prior to the open of business on the ex-dividend date for such dividend or distribution, or the open of business on the effective date of such share split or share combination; 

CR1 = the new conversion rate in effect immediately after the open of business on the ex-dividend date for such dividend or distribution, or the open of business on the effective date of such share split or share combination; 

OS0 = the number of shares of our common stock outstanding immediately prior to
the open of business on the ex-dividend date, or the open of business on the effective date of such share split or share combination; and 

OS1 = the number of shares of our common stock outstanding immediately after
giving effect to such dividend or distribution, or the effective date of such share split or share combination. 

 Any adjustment made pursuant to this clause (1) shall become effective as of the open of business on (x) the ex-dividend date for such dividend or other distribution or (y) the date on which such split or combination becomes effective, as applicable. If any dividend or distribution described in
this clause (1) is declared but not so paid or made, the new conversion rate shall be readjusted to the conversion rate that would then be in effect if such dividend or distribution had not been declared. 

 

	 	(2)	 If we distribute to all holders of our common stock any rights, warrants or options entitling them for a period
of not more than 45 calendar days after the date of distribution thereof to subscribe for or purchase our common stock, in any case at an exercise price per share of our common stock less than the average of the closing prices of our common stock
for the 10 consecutive trading days ending on, and including, the trading day immediately preceding the date of the announcement of such distribution, the conversion rate will be increased based on the following formula: 

 

			
	CR1 = CR0 ×	  	OS0 + X
	  	OS0 + Y

 where: 

CR0 = the conversion rate in effect immediately prior to the open of business on the ex-dividend date for such distribution; 

CR1 = the new conversion rate in effect immediately after the open of business on the ex-dividend date for such distribution; 

OS0 = the number of shares of our common stock outstanding immediately prior to the ex-dividend date for such distribution; 
 X = the aggregate number of shares of our common
stock issuable pursuant to such rights, warrants or options; and 
 Y = the number of shares of our common stock equal to the quotient of
(A) the aggregate price payable to exercise all such rights, warrants or options divided by (B) the average of the closing prices of our common stock for the 10 consecutive trading days ending on, and including, the
trading day immediately preceding the date of the announcement of the distribution of such rights, warrants or options. 
 For purposes of this clause (2),
in determining whether any rights, warrants or options entitle the holders to subscribe for or purchase our common stock at less than the average of the closing prices of our common stock for the 10 consecutive trading days ending on, and including,
the trading day immediately preceding the date of the announcement of the distribution of such rights, warrants or options, and in determining the aggregate exercise or conversion price payable for such common stock, there shall be taken into
account any consideration received by us for such rights, warrants or options and any amount payable on exercise or conversion thereof, with the value of such consideration, if other than cash, to be determined by us. Any increase made under this
clause (2) will be made successively whenever any such rights, options or warrants are distributed and shall become effective immediately after the open of business on the ex-dividend date for
such distribution. If any right, warrant or option described in this clause (2) is not exercised or converted prior to the expiration of the exercisability or convertibility thereof, the new conversion rate shall be readjusted to the conversion
rate that would then be in effect if such right, warrant or option had not been so distributed. 
  

	 	(3)	 If we distribute shares of capital stock, evidences of indebtedness or other assets or property of us to all
holders of our common stock, excluding: 

  

	 	(A)	 dividends, distributions, rights, warrants or options as to which an adjustment was effected in clause
(1) or (2) above; 

  

	 	(B)	 dividends or distributions paid exclusively in cash; and 

 

	 	(C)	 spin-offs described below in this clause (3), 

then the conversion rate will be increased based on the following formula: 

 

			
	CR1 = CR0 ×	  	SP0             
	  	SP0 – FMV

 where: 

CR0 = the conversion rate in effect immediately prior to the open of business on the ex-dividend date for such distribution; 

CR1 = the new conversion rate in effect immediately after the open of business on the ex-dividend date for such distribution; 

SP0 = the closing price of our common stock on the trading day immediately
preceding the ex-dividend date for such distribution; and 
 FMV = the fair market value
(as determined in good faith by us) of the shares of capital stock, evidences of indebtedness, assets or property distributed with respect to each outstanding share of our common stock on
the ex-dividend date for such distribution. 
 An adjustment to the conversion rate made pursuant to the
immediately preceding paragraph shall become effective as of the open of business on the ex-dividend date for such distribution. 

Notwithstanding the foregoing, if “FMV” (as defined above) is equal to or greater than
“SP0” (as defined above), in lieu of the foregoing increase, each holder of convertible preferred stock shall receive, in respect of each share of convertible preferred stock, at the
same time and upon the same terms as holders of our common stock and without having to convert its shares of convertible preferred stock, the amount and kind of our capital stock, evidences of indebtedness or other assets or property of ours that
such holder would have received if such holder owned a number of shares of common stock equal to the conversion rate in effect on the ex-dividend date for the distribution. 

If we distribute to all holders of our common stock, capital stock of any class or series, or similar equity interest, of or relating to a subsidiary or other
business unit, in each case, that will be listed on a U.S. national securities exchange (which we refer to as a “spin-off”), the conversion rate in effect immediately following the 10th
trading day immediately following, and including, the ex-dividend date of the spin-off will be increased based on the following formula: 

 

			
	CR1 = CR0 ×	  	FMV0 + MP0
		  	MP0

 where: 

CR0 = the conversion rate in effect on the 10th trading day immediately following,
and including, the ex-dividend date of the spin-off; 

CR1 = the new conversion rate immediately after the 10th trading day immediately
following (and including) the ex-dividend date of the spin-off; 

FMV = the average of the closing prices of the capital stock or similar equity interest distributed to holders of our common stock applicable
to one share of our common stock over the first 10 consecutive trading days after (and including) the ex-dividend date of the spin-off (the
“valuation period”); and 
 MP0 = the average of the closing prices of
our common stock over the valuation period. 
 The increase to the conversion rate under the preceding paragraph will occur at the close of business on the
last trading day of the valuation period; provided that (x) in respect of any conversion of convertible preferred stock for which physical settlement is applicable, if the relevant conversion date occurs during the valuation
period, the reference to “10” in the preceding paragraph shall be deemed replaced with such lesser number of trading days as have elapsed from, and including, the ex-dividend date for such spin-off to, and including, such conversion date in determining the conversion rate and (y) in respect of any conversion of convertible preferred stock for which cash settlement or combination
settlement is applicable, for any trading day that falls within the relevant observation period for such conversion and within the valuation period, the reference to “10” in the preceding paragraph shall be deemed replaced with such lesser
number of trading days as have elapsed from, and including, the ex-dividend date for such spin-off to, and including, such trading day in determining
the conversion rate as of such trading day. 
 If any such dividend or distribution described in this clause (3) is declared but not paid or made, the
new conversion rate shall be readjusted to be the conversion rate that would then be in effect if such dividend or distribution had not been declared. 

	 	(4)	 If any cash dividend or distribution is made to all or substantially all holders of our common stock, other
than a regular, quarterly cash dividend that does not exceed $0.9175 per share (the “initial dividend threshold”), the conversion rate will be adjusted based on the following formula: 

 

			
	CR1 = CR0 ×	  	SP0 – IDT
	  	  SP0 – C

 where, 

CR0 = the conversion rate in effect immediately prior to the open of business on the ex-dividend date for such dividend or distribution; 
 CR1 = the conversion rate in effect immediately after the open of business on the ex-dividend date for such dividend or distribution; 

SP0 = the closing price of our common stock on the trading day immediately
preceding the ex-dividend date for such distribution; 
 C = the amount in cash per share
we distribute to holders of our common stock; and 
 IDT = the initial dividend threshold; provided that if the dividend or
distribution is not a regular quarterly cash dividend, the initial dividend threshold will be deemed to be zero. 
 Any increase to the conversion rate made
pursuant to this clause (4) shall become effective as of the open of business on the ex-dividend date for such dividend or distribution. If any such dividend or distribution is not so paid or
made, the new conversion rate shall be readjusted to the conversion rate that would be in effect if such dividend or distribution had not been declared. 

Notwithstanding the foregoing, if “C” (as defined above) is equal to or greater than
“SP0” (as defined above), in lieu of the foregoing increase, each holder of convertible preferred stock shall receive, for each share of convertible preferred stock, at the same time
and upon the same terms as holders of shares of our common stock and without having to convert its shares of convertible preferred stock, the amount of cash that such holder would have received if such holder owned a number of shares of our common
stock equal to the conversion rate on the ex-dividend date for such cash dividend or distribution. 
 The
initial dividend threshold is subject to adjustment in a manner inversely proportional to adjustments to the conversion rate, provided that no adjustment will be made to the initial dividend threshold for any adjustment made to the
conversion rate under this clause (4). 
  

	 	(5)	 If we or any of our subsidiaries make a payment in respect of a tender offer or exchange offer for our common
stock to the extent that the cash and value of any other consideration included in the payment per share of our common stock exceeds the closing price of a share of our common stock on the trading day next succeeding the last date on which tenders
or exchanges may be made pursuant to such tender or exchange offer, the conversion rate will be increased based on the following formula: 

  

			
	CR1 = CR0 ×	  	AC + (SP1 × OS1)
	  	      OS0 ×SP1

 where: 

CR0 = the conversion rate in effect immediately prior to the close of business on
the trading day on which such tender or exchange offer expires; 
 CR1 = the
conversion rate in effect immediately after the close of business on the trading day immediately following the date such tender or exchange offer expires; 

AC = the aggregate value of all cash and any other consideration (as determined in good faith by us) paid or payable for our common stock
purchased in such tender or exchange offer; 
 OS0 = the number of shares of our
common stock outstanding immediately prior to the close of business on the trading day such tender or exchange offer expires (prior to giving effect to the purchase or exchange of shares pursuant to such tender or exchange offer); 

 OS1 = the number of shares of
our common stock outstanding immediately after the close of business on the trading day such tender or exchange offer expires (after giving effect to the purchase or exchange of shares pursuant to such tender or exchange offer); and 

SP1 = the closing price of our common stock on the trading day next succeeding the
date such tender or exchange offer expires. 
 If the application of the foregoing formula would result in a decrease in the conversion rate, no adjustment
to the conversion rate will be made. 
 Any adjustment to the conversion rate made pursuant to this clause (5) shall become effective at the close of
business on the trading day immediately following the date such tender offer or exchange offer expires. If we or one of our subsidiaries is obligated to purchase our common stock pursuant to any such tender or exchange offer but is permanently
prevented by applicable law from effecting any such purchase or all such purchases are rescinded, the new conversion rate shall be readjusted to be the conversion rate that would be in effect if such tender or exchange offer had not been made. 

If we have in effect a rights plan while any convertible preferred stock remains outstanding, holders of convertible preferred stock will receive, upon a
conversion of convertible preferred stock, in addition to shares of our common stock, if any, rights under our shareholder rights agreement unless, prior to conversion, the rights have separated from our common stock, in which case the conversion
rate will be adjusted at the time of separation as if we had distributed to all holders of our common stock capital stock, evidences of indebtedness or other assets or property pursuant to clause (3) above, subject to readjustment upon the
subsequent expiration, termination or redemption of the rights. 
 Notwithstanding the foregoing, if a conversion rate adjustment becomes effective on any ex-dividend date as described above, and a holder that has converted its shares of the convertible preferred stock on or after such ex-dividend date
and on or prior to the related record date would be treated as the record holder of our common stock as of the related conversion date based on an adjusted conversion rate for such ex-dividend date,
then, notwithstanding the foregoing conversion rate adjustment provisions, the conversion rate adjustment relating to such ex-dividend date will not be made for such converting holder. Instead, such
holder will be treated as if such holder were the record owner of our common stock on an unadjusted basis and participate in the related dividend, distribution or other event giving rise to such adjustment. 

In addition to the adjustments pursuant to paragraphs (1) through (5) above, we may increase the conversion rate in order to avoid or diminish any
income tax to holders of our common stock resulting from any dividend or distribution of capital stock (or rights to acquire our common stock) or from any event treated as such for income tax purposes. We may also, from time to time, to the extent
permitted by applicable law, increase the conversion rate by any amount for any period of at least 20 business days if we have determined that such increase would be in our best interests. If we make such determination, it will be conclusive and we
will mail to holders of the convertible preferred stock a notice of the increased conversion rate and the period during which it will be in effect at least 15 calendar days prior to the date the increased conversion rate takes effect in accordance
with applicable law. 
 No adjustment to the conversion rate will be made if holders of the convertible preferred stock, as a result of holding the
convertible preferred stock and without conversion thereof, are entitled to participate at the same time as our common stock holders participate in any of the transactions described above as if such holders of the convertible preferred stock held a
number shares of our common stock equal to the conversion rate, multiplied by the number of shares of convertible preferred stock held by such holder, without having to convert their convertible preferred stock. 

As used in this section and in “Description of the Purchase Contracts—Anti-dilution Adjustments” above, “record date” means, with
respect to any dividend, distribution or other transaction or event in which the holders of our common stock (or other applicable security) have the right to receive any cash, securities or other property or in which our common stock (or such other
security) is exchanged for or converted into any combination of cash, securities or other property, the date fixed for determination of holders of our common stock (or such other security) entitled to receive such cash, securities or other property
(whether such date is fixed by our board of directors or a duly authorized committee thereof, statute, contract or otherwise). 

 The conversion rate will not be adjusted except as specifically set forth in this “Conversion Rate
Adjustments” and in “—Conversion Rights—Adjusted Conversion Rate Upon a Fundamental Change.” Without limiting the foregoing, the conversion rate will not be adjusted for: 

 

	 	•	 	 the issuance of our common stock pursuant to any present or future plan providing for the reinvestment of
dividends or interest payable on securities of ours and the investment of additional optional amounts in shares of our common stock under any plan; 

  

	 	•	 	 the issuance of our common stock or options or rights to purchase those shares pursuant to any present or future
employee, director, trustee or consultant benefit plan, employee agreement or arrangement or program of ours; 

  

	 	•	 	 the issuance of our common stock pursuant to any option, warrant, right, or exercisable, exchangeable or
convertible security outstanding as of the date the convertible preferred stock was first issued; 

  

	 	•	 	 a change in the par value of our common stock; and 

 

	 	•	 	 accumulated and unpaid dividends. 

All required calculations will be made to the nearest cent or 1/10,000th of a share, as the case may be. We will not be required to make an adjustment to
the conversion rate unless the adjustment would require a change of at least 1% in the conversion rate. However, we will carry forward any adjustments that are less than 1% of the conversion rate and make such carried-forward adjustments
(x) when all such carried-forward adjustments aggregate to a change of at least 1% in the conversion rate and (y) regardless of whether the aggregate adjustment is less than 1% (i) on the effective date for any fundamental change,
(ii) on the conversion date in respect of any shares of convertible preferred stock for which physical settlement applies and (iii) on each trading day of any observation period in respect of any conversion of convertible preferred stock
for which cash settlement or combination settlement applies. 
 In the event of a taxable distribution to holders of shares of our common stock that results
in an adjustment to the conversion rate, holders of Corporate Units and convertible preferred stock may, in certain circumstances, be deemed to have received a distribution subject to U.S. federal income tax as a dividend. See “Material U.S.
Federal Income Tax Considerations—U.S. Holders—Convertible Preferred Stock—Constructive Distributions” below. In addition, non-U.S. holders of Corporate Units and convertible
preferred stock may, in certain circumstances, be deemed to have received a distribution subject to U.S. federal withholding tax requirements. See “Material U.S. Federal Income
Tax Considerations—Non-U.S. Holders.” 
 Adjustments of Prices 

Whenever any provision of the preferred stock articles of amendment requires us to calculate the closing prices, the daily VWAPs, the daily
conversion values or the daily settlement amounts over a span of multiple days (including any observation period, the five-day average price and the “stock price” and “fundamental
change settlement price” (if applicable) for purposes of this “Description of the Convertible Preferred Stock” section), we will make appropriate adjustments to each to account for any adjustment to the conversion rate that becomes
effective, or any event requiring an adjustment to the conversion rate where the ex-dividend date or the expiration date of the event occurs, at any time during the period when the closing prices,
the daily VWAPs, the daily conversion values or the daily settlement amounts are to be calculated. 
 Transfer Agent, Registrar, Paying Agent, Conversion
Agent 
 The registrar and transfer agent for the convertible preferred stock is Broadridge Corporation Issuer Solutions, Inc. The paying
agent and conversion agent for the convertible preferred stock is Deutsche Bank Trust Company Americas. 
 Remarketing 

The convertible preferred stock will be remarketed as described under “Description of the Purchase Contracts—Remarketing.” 

 In connection with a successful remarketing: 

 

	 	•	 	 the dividend rate and/or conversion rate of all outstanding shares of convertible preferred stock (whether or not
the holder of such shares elected to participate in the remarketing) may be increased, if applicable, as described below; and 

  

	 	•	 	 dividends will continue to be payable on the convertible preferred stock quarterly, when, as and if declared by
our board of directors, as described herein. 

 In order to remarket the convertible preferred stock, our board of directors may, after
consultation with the remarketing agent, increase the dividend rate in order to produce the required price in the remarketing. In addition, if, on the date of any successful remarketing, the closing price of our common stock on such date
is less than the reference price, the conversion rate for the convertible preferred stock will increase to an amount equal to $1,000, divided by 120% of the closing price of our common stock on the date of such remarketing (rounded
to the nearest ten-thousandth share). If, however, on the date of any successful remarketing, the closing price of our common stock on such date is greater than or equal to the reference price, we
will not change the conversion rate for the convertible preferred stock. 
 Notwithstanding the foregoing, in no event will the increased conversion rate
for the convertible preferred stock exceed 45.1000 shares of common stock per share of convertible preferred stock (which is approximately equal to four times the initial conversion rate for the convertible preferred stock), subject to adjustment in
the same manner as the conversion rate as set forth under “Description of the Convertible Preferred Stock—Conversion Rate Adjustments.” 

Remarketing of Shares That Are Not Included in Corporate Units 

At any time prior to a remarketing, other than during a blackout period, holders of convertible preferred stock that do not underlie Corporate Units may elect
to have their shares of convertible preferred stock remarketed in such remarketing in the same manner as shares of convertible preferred stock that underlie Corporate Units by delivering their shares along with a notice of this election to the
custodial agent. The custodial agent will hold the shares of convertible preferred stock in an account separate from the collateral account in which the pledged securities will be held. Holders of shares of convertible preferred stock electing to
have their shares remarketed will also have the right to withdraw their election at any time prior to 5:00 p.m., New York City time, on the second business day immediately preceding an optional remarketing period or the final remarketing period, as
applicable. In the event of a successful remarketing during the optional remarketing period, each holder of separate shares of convertible preferred stock that elects to have its shares remarketed will receive, for each share sold, at least the
remarketing price per share of convertible preferred stock on the optional remarketing settlement date. The “remarketing price per share of convertible preferred stock” means, for each share of convertible preferred stock, an amount in
cash equal to the quotient of the Treasury portfolio purchase price divided by the number of shares of convertible preferred stock included in such remarketing that are held as components of Corporate Units. For purposes
of determining the proceeds that the remarketing agent will seek to obtain for the convertible preferred stock in an optional remarketing, the “separate convertible preferred stock purchase price” means the amount in cash equal to the
product of (A) the remarketing price per share of convertible preferred stock and (B) the number of shares of convertible preferred stock included in such remarketing that are not part of Corporate Units. Any proceeds in excess of such
amount in respect of such remarketed shares will be delivered to the holders of such shares that elected to participate in the optional remarketing. In the event of a successful remarketing during the final remarketing period, each holder of
separate shares of convertible preferred stock that elects to have its shares remarketed will receive an amount in cash on the purchase contract settlement date, for each such share, equal to at least $1,000. Any proceeds in excess of such amounts
in respect of such remarketed shares will be delivered to the holders of such shares that elected to participate in the final remarketing. Except in the case of a dividend deficiency event, any accumulated and unpaid dividends on such shares
(including compounded dividends thereon), whether or not declared, will be paid by us, on the purchase contract settlement date, to holders of record on the immediately preceding dividend payment record date. If a dividend deficiency event occurs,
following the final remarketing (whether successful or failed), we shall have no obligation to pay the then accumulated but unpaid dividends on the convertible preferred stock on the purchase contract settlement date to the holders of the
shares of convertible preferred stock as of the record date immediately preceding the purchase contract settlement date. However, the right to receive such accumulated but unpaid dividends (including compounded dividends thereon) shall continue to
exist (and shall continue to compound) with respect to such convertible preferred stock notwithstanding such remarketing, and such dividends shall be payable to the holders of such convertible preferred stock as of the record date for the dividend
payment date on which such dividends are subsequently declared and paid (if ever). If there are any accumulated and unpaid dividends on the convertible preferred stock for prior dividend periods, or we have not declared a dividend payable on the
March 1, 2022 dividend payment date, we may not conduct an optional remarketing. 

 Increased Dividend Rate and Increased Conversion Rate 

In the case of a successful remarketing, the dividend rate on the convertible preferred stock may be increased and/or the conversion rate on the convertible
preferred stock may be increased, in each case, effective on the settlement date of the remarketing, which will be, in the case of a successful optional remarketing, the second business day following the optional remarketing date (or such other date
as we and the remarketing agent agree upon) and, in the case of the final remarketing period, the purchase contract settlement date. If the dividend rate is increased pursuant to a successful optional remarketing, the increased rate will be the
dividend rate determined by one or more of our senior officers acting under authority granted by our board of directors, after consultation with the remarketing agent, as the rate the convertible preferred stock should bear in order for the net
remarketing proceeds of such convertible preferred stock to have an aggregate market value on the optional remarketing date of at least 100% of the aggregate of the Treasury portfolio purchase price plus the separate
convertible preferred stock purchase price, if any. If the dividend rate is increased pursuant to a successful final remarketing, the increased rate will be the dividend rate determined by one or more of our senior officers acting under authority
granted by our board of directors, after consultation with the remarketing agent, as the rate the convertible preferred stock should bear in order for the net remarketing proceeds to equal at least $1,000 multiplied by the
aggregate number of shares of convertible preferred stock being remarketed. We will not decrease the dividend rate in connection with a successful remarketing. 

In addition, if, on the date of any successful remarketing, the closing price of our common stock is less than the reference price, the conversion rate for
the convertible preferred stock will increase to an amount equal to $1,000, divided by 120% of the closing price of our common stock on such date (rounded to the
nearest ten-thousandth share). If, however, on the date of any successful remarketing, the closing price of our common stock on such date is greater than or equal to the reference price, we will not
change the conversion rate for the convertible preferred stock. We will not decrease the conversion rate in connection with a successful remarketing. 

Notwithstanding the foregoing, in no event will the increased conversion rate for the convertible preferred stock exceed 45.1000 shares of common stock per
share of convertible preferred stock (which is approximately equal to four times the initial conversion rate for the convertible preferred stock), subject to adjustment in the same manner as the conversion rate as set forth under “Description
of the Convertible Preferred Stock—Conversion Rate Adjustments.” 
 If the convertible preferred stock is not successfully remarketed, neither the
dividend rate nor the conversion rate will be changed. 
 The remarketing agent is not obligated to purchase any shares of convertible preferred stock that
would otherwise remain unsold in the remarketing. None of us, the remarketing agent or any agent of us or the remarketing agent will be obligated in any case to provide funds to make payment upon tender of convertible preferred stock for
remarketing. 
 Automatic Settlement Upon Failed Final Remarketing 

If the convertible preferred stock has not been successfully remarketed on or prior to the last day of the final remarketing period, all ownership interests in
shares of convertible preferred stock held as part of Corporate Units will be delivered to us on the purchase contract settlement date in full satisfaction of the Corporate Unit holders’ obligations to purchase our common stock under the
related purchase contracts on the purchase contract settlement date, unless the holder separately cash settles purchase contracts as described below. Notwithstanding the foregoing, except in the case of a dividend deficiency event, all accumulated
and unpaid dividends (including compounded dividends thereon) will be paid on the purchase contract settlement date to the holders of the shares of convertible preferred stock as of the record date immediately preceding the purchase contract
settlement date, whether or not declared. If a dividend deficiency event occurs, following the final remarketing (whether successful or not), we shall have no obligation to pay the then accumulated but unpaid dividends on the convertible preferred
stock on the purchase contract settlement date to the holders of the shares of convertible preferred stock as of the record date immediately preceding the purchase contract settlement date. 

 The ownership interest in convertible preferred stock underlying a Corporate Unit will be automatically
delivered to us thereby satisfying such holder’s obligations to us under the related purchase contracts in full, unless, prior to 5:00 p.m., New York City time, on the second business day immediately prior to the purchase contract settlement
date, the holder provides written notice of an intention to settle the related purchase contracts with separate cash and on or prior to the business day immediately preceding the purchase contract settlement date delivers to the securities
intermediary $1,000 in cash per 10 purchase contracts. Holders of Corporate Units may settle their purchase contracts with separate cash only in integral multiples of 10 Corporate Units. 

Payment 
 So long as any separate shares of convertible
preferred stock are registered in the name of DTC, as depository for the convertible preferred stock as described herein under “Book-Entry Issuance—The Depository Trust Company,” or DTC’s nominee, payments on the convertible
preferred stock will be made as described therein.  
 Form 

So long as any separate shares of convertible preferred stock are registered in the name of DTC, as depository for the convertible preferred stock as described
herein under “Book-Entry Issuance—The Depository Trust Company,” or DTC’s nominee, transfers and exchanges of beneficial interests in the separate shares of convertible preferred stock will be made as described therein. 

Certain Trading Characteristics 
 The convertible
preferred stock is expected to trade at a price that takes into account the value, if any, of accumulated but unpaid dividends (except for declared dividends accumulated after a record date and prior to a dividend payment date, which dividends will
be payable to the holders as of the record date, as described above); thus, it is expected that purchasers of the convertible preferred stock will not pay, and sellers will not receive, accumulated and unpaid dividends with respect to the
convertible preferred stock that is not included in the trading price thereof. 
 Title 

We and any agent of ours will treat the person or entity in whose name securities are registered as the absolute owner of those securities for the purpose of
making payments and for all other purposes irrespective of notice to the contrary. 
 Book-Entry Issuance—The Depository Trust Company 

The shares of convertible preferred stock were issued in fully registered form and are evidenced by one or more global securities registered in the name of
DTC’s nominee, Cede & Co.. Such global securities are deposited with the registrar as custodian for DTC and, in the case of shares of convertible preferred stock that form a part of the Corporate Units, credited to the collateral
account. See “Certain Provisions of the Purchase Contract and Pledge Agreement—Book-Entry System for Corporate Units, Treasury Units and Cash Settled Units” for a description of DTC. 

Purchases of the convertible preferred stock under the DTC system must be made by or through direct participants, which will receive a credit for the
convertible preferred stock on DTC’s records. The ownership interest of each actual purchaser of each share of convertible preferred stock (“beneficial owner”) is in turn to be recorded on the direct and indirect participants’
records. Beneficial owners will not receive written confirmation from DTC of their purchases, but beneficial owners are expected to receive written confirmations providing details of the transactions, as well as periodic statements of their
holdings, from the direct or indirect participant through which they purchased the convertible preferred stock. Transfers of ownership interests on the convertible preferred stock are to be accomplished by entries made on the books of direct and
indirect participants acting on behalf of beneficial owners. Beneficial owners will not receive certificates representing their ownership interests in convertible preferred stock, except in the event that use of the book-entry system for the
convertible preferred stock is discontinued. 
 To facilitate subsequent transfers, all convertible preferred stock deposited by direct participants with
DTC are registered in the name of DTC’s nominee, Cede & Co.. The deposit of the convertible preferred stock with DTC and their registration in the name of Cede & Co. or such other nominee do not effect any change in beneficial
ownership. DTC has no knowledge of the actual beneficial owners of the convertible preferred stock; DTC’s records reflect only the identity of the direct participants to whose accounts the shares of convertible preferred stock are credited,
which may or may not be the beneficial owners. The direct and indirect participants will remain responsible for keeping account of their holdings on behalf of their customers.  

 Conveyance of notices and other communications by DTC to direct participants, by direct participants to
indirect participants, and by direct participants and indirect participants to beneficial owners, will be governed by arrangements among them, subject to any statutory or regulatory requirements as may be in effect from time to time. Notices will be
sent to DTC. 
 Neither DTC nor Cede & Co. (nor such other DTC nominee) will consent or vote with respect to the convertible preferred stock unless
authorized by a direct participant in accordance with DTC’s procedures. Under its usual procedures, DTC mails an omnibus proxy to us as soon as possible after the record date. The omnibus proxy assigns the voting or consenting rights of
Cede & Co. to those direct participants to whose accounts the shares of convertible preferred stock are credited on the record date. We believe that these arrangements will enable the beneficial owners to exercise rights equivalent in
substance to the rights that can be directly exercised by a registered holder of the convertible preferred stock. 
 Payments of dividends on the
convertible preferred stock will be made to Cede & Co. (or such other nominee of DTC). DTC’s practice is to credit direct participants’ accounts upon DTC’s receipt of funds and corresponding detail information from us or the
transfer agent, on payable date in accordance with their respective holdings shown on DTC’s records. Payments by participants to beneficial owners will be governed by standing instructions and customary practices and will be the responsibility
of each participant and not of DTC or us, subject to any statutory or regulatory requirements as may be in effect from time to time. Payment of dividends to Cede & Co. (or other such nominee of DTC) is our responsibility. Disbursement of
such payments to direct participants will be the responsibility of DTC, and disbursement of such payments to the beneficial owners is the responsibility of direct and indirect participants. 

A beneficial owner will not be entitled to receive physical delivery of the convertible preferred stock. Accordingly, each beneficial owner must rely on the
procedures of DTC to exercise any rights under the convertible preferred stock. 
 DTC may discontinue providing its services as securities depository with
respect to the convertible preferred stock at any time by giving us or the transfer agent reasonable notice. In the event no successor securities depository is obtained, certificates for the convertible preferred stock will be printed and delivered.

 The information in this section concerning DTC’s book-entry system has been obtained from sources that we believe to be reliable, but neither we nor
the underwriters take any responsibility for the accuracy of this information.EX-4.19

 EXHIBIT 4.19 

DESCRIPTION OF VIRGINIA ELECTRIC AND POWER COMPANY 

COMMON STOCK 
 The following description
of Virginia Electric and Power Company’s common stock, which is registered under Section 12(g) of the Securities Exchange Act of 1934, as amended, is a summary and is qualified in its entirety by reference to its articles of incorporation
and bylaws, which are incorporated by reference as exhibits to the Annual Report on Form 10-K of which this exhibit is a part. You are encouraged to read Virginia Electric and Power Company’s articles of
incorporation and bylaws, as well as applicable provisions of the Virginia Stock Corporation Act, for more information. 
 Authorized Shares 

Virginia Electric and Power Company (“Virginia Power”) is authorized to issue 500,000 shares of common stock, no par value, and 10,000,000 shares of
preferred stock. Virginia Power’s parent, Dominion Energy, Inc. (“Dominion Energy”), currently holds all 274,723 outstanding shares of Virginia Power’s common stock. There are currently no shares of preferred stock outstanding.
However, Virginia Power’s board can, without approval of the holders of the common stock, issue one or more series of preferred stock with such rights, preferences and limitations as are determined and set by the board. 

Dividends 
 Dividends on the common stock are payable at
the direction of Virginia Power’s board of directors so long as dividends on any outstanding preferred stock with respect to all past dividend periods and the then-current period have been paid in full or declared and set apart for payment and
all mandatory sinking fund payments due with respect to any outstanding series of preferred stock have been made. Because Virginia Power is a Virginia public service company, the Virginia State Corporation Commission may prohibit Virginia Power from
declaring or paying a dividend to an affiliate if found to be inconsistent with the public interest. In addition, Virginia Power may from time to time enter into certain agreements that could restrict its ability to pay dividends. 

Voting Rights 
 Holders of the common stock are entitled
to one vote per share on all matters on which such holders may vote. Unless otherwise provided under Virginia Power’s articles of incorporation or under Virginia law, action on any such matters shall be approved if the votes cast approving the
matter exceed the votes cast opposing the matter at a meeting at which a quorum is present, with a quorum being a majority of the shares outstanding. Subject to the accrual of voting rights to the preferred stock in the event of a default on the
payment of dividends on any of the then-outstanding preferred stock, holders of the common stock have the sole and full power to vote for the election of Virginia Power’s directors. Directors are elected on an annual basis by a plurality vote
of the common shares and may be removed by a majority vote of the holders of the common stock, subject, in each case, to the accrual of voting rights to the preferred stock noted above. 

Liquidation Rights 
 In the event of any liquidation,
dissolution or winding up of Virginia Power, holders of the common stock are entitled to share ratably in the distribution of those assets, or proceeds from the sale thereof, remaining after the full preferential amounts to which any holders of
preferred stock are entitled have been paid or set aside for payment. 
 Preemptive and Other Rights 

Holders of the common stock do not have preemptive rights or redemption or conversion rights. Shares of common stock are not subject to any further calls or
assessments and are not entitled to the benefit of any sinking fund provision.

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