Document:

Senior Subordinated Note issued to Aqua America, Inc.

 Exhibit 4.9 
  

This Note is subject to the Amended and Restated Subordination and Intercreditor Agreement, among the Holder, BWCA I, LLC and the other parties thereto, under which
this Note and the Issuer’s obligations hereunder are subordinated in the manner set forth therein to the prior payment of certain obligations to the holder of Senior Indebtedness as defined therein. 
  
 SENIOR SUBORDINATED NOTE 
  

	 $2,000,000.00 
	 February 10, 2006 

  
 Basin Water, Inc., a California corporation (the “Issuer”), for value received, promises to pay to Aqua America, Inc., a Pennsylvania
corporation, or its registered assigns (the “Holder”) the principal sum of Two Million Dollars ($2,000,000.00), together with interest, in the manner provided herein and all fees, expenses and other obligations of Issuer which may
be added to the principal amount of this Note as set forth in the other Purchase Documents. This Senior Subordinated Note (this “Note”) was issued pursuant to that certain Subordinated Note with Warrants Purchase Agreement dated as
of February 10, 2006 between the Issuer and the Holder (the “Agreement”) and is entitled to the benefits of the Agreement. Except as to those terms otherwise defined in this Note, all capitalized terms used in this Note shall
have the respective meanings ascribed to them in the Agreement. 
  
 1. Payments; Maturity Date. 
  
 (a)
Commencing on March 1, 2006, interest on the outstanding principal balance shall be due and payable semiannually in arrears on March 1 and September 1 of each year until the earliest of (i) the Maturity Date (as defined below),
(ii) the first anniversary of the Initial Public Offering and (iii) the date on which the amounts due under this Note are accelerated pursuant to Section 4 below, on which date all outstanding principal and accrued interest
shall be due and payable in full. Principal on this Note shall be due and payable on the earliest of (i) the Maturity Date (as defined below and subject to Section 1(b) below), (ii) the first anniversary of the Initial Public
Offering and (iii) the date on which the amounts due under this Note are accelerated pursuant to Section 4 below, on which date all outstanding principal and accrued interest shall be due and payable in full. 
  
 (b) As used herein, the term “Maturity Date” means February
10, 2009. 

 (c) If any payment due under this Note shall become due on a Saturday, Sunday or public holiday under the
laws of the State of New York, such payment shall be made on the next succeeding business day and such extension of time shall be included in computing interest in connection with such payment. 
  
 2. Interest. 
  
 (a) Interest on the outstanding unpaid principal balance shall accrue at the
rate of (a) seven percent (7%) per annum, compounded semi-annually and computed on the basis of a 360-day year counting the actual number of days elapsed and (b) to the extent permitted by law, at the rate of nine percent (9%) on
(i) any overdue payment of interest, (ii) any fees, expenses or other obligations of issuer which are added to the principal amount of this Note as set forth in the other Purchase Documents and (iii) any payments hereunder that are
not timely made as a result of the restrictions set forth in the Subordination Agreement. 
  
 (b) At the option of the Issuer, interest due under this Note may be paid in cash or in shares of Common Stock with a value equal to the accrued and unpaid interest (“Interest Payment Shares”). For
the purpose of valuing any Interest Payment Shares delivered by the Issuer to the Holder under this Section 2, such shares shall be deemed to have been issued at the Base Price (as defined below) as in effect on the date of delivery. In the
event that subsequent to any such delivery of Interest Payment Shares the Issuer engages in a transaction such that the Share Price (as defined in the Warrants) of the Warrants is reduced (or would have been reduced if all Warrants have been
exercised as of the time of such transaction) pursuant to the terms of Section 4.4(a) of the Warrant Certificate to a price that is less than the Base Price at which such Interest Payment Shares were issued, (i) the Base Price hereunder
shall be reduced to match the Share Price as so reduced under the Warrants and (ii) the Issuer shall deliver to the Holder an additional number of Interest Payment Shares equal to the difference between (A) the number of Interest Payment
Shares that would have been delivered to the Holder had the Base Price as so reduced been in effect at the time of the prior delivery of the Interest Payment Shares at issue and (B) the number of Interest Payment Shares previously delivered to
the Holder. As used in this Note, the term “Base Price” shall initially mean Six Dollars ($6.00) per share of Common Stock, as such Base Price may be adjusted after the date hereof pursuant to the terms of this
Section 2(b). Notwithstanding the foregoing, this Section 2(b) shall have no further force and effect and the Issuer shall have no obligation to deliver additional Interest Payment Shares pursuant to this
Section 2(b) after the Initial Public Offering. 
  
 3. Prepayment. The Issuer shall be permitted at any time, in an amount not less than the smaller of (i) Ten Thousand Dollars ($10,000) and (ii) the then remaining unpaid balance due under this Note, and upon five
(5) Business Days prior written notice to the Holder, to prepay all or a portion of the outstanding principal indebtedness of this Note. Any such prepayment shall include payment of (i) any unpaid fees and expenses under of the Agreement
and (ii) all accrued and unpaid interest. Any amounts which are so prepaid shall be applied to first to any accrued and unpaid interest hereunder up to the date of such prepayment and then to the principal balance outstanding hereunder. There
shall be no penalty for prepayment of the Note pursuant to this Section 3. 
  
 4. Default. In case an Event of Default shall occur and be continuing, the entire unpaid principal balance of this Note and all accrued and unpaid interest shall become due and payable in the manner and
with the effect provided in the Agreement. The Issuer further agrees to pay the Holder’s fees and expenses as provided for in Section 9.05(i) of the Agreement. 

 5. Subordination. The payment of the principal of and interest on this Note is expressly
subordinated in right of payment to the Senior Debt to the extent and in the manner set forth in the Subordination Agreement. 
  
 6. Miscellaneous. 
  
 (a) The Issuer will pay to the Holder, in immediately available funds to such account as the Holder may specify in writing, all amounts payable to the
Holder in respect of the principal, interest or other amounts due under this Note, without any presentation of this Note. Each such payment, when paid, shall be applied first to the fees and charges due under this Note, second to the payment of
interest accrued and unpaid on this Note and third to the payment of the principal balance outstanding hereof. All payments hereunder shall be made at the Holder’s principal offices at the address set forth on the signature page of the
Agreement. All calculations and applications of amounts due on any date, whether by acceleration or otherwise, will be made by the Holder, and the Issuer agrees that all such calculations and applications will be conclusive and binding absent
manifest error. 
  
 (b) All payments by the Issuer under this Note
shall be made without set-off or counterclaim and be free and clear and without any deduction or withholding for any taxes or fees of any nature whatsoever, unless the obligation to make such deduction or withholding is imposed by law. 

 
 (c) This Note is secured by the Collateral and other assets, property
rights and interests as described in the Security Documents. 
  
 (d) No delay or omission on the part of the Holder in exercising any right under this Note shall operate as a waiver of such right or of any other right of Holder, nor shall any delay, omission or waiver on any one occasion de deemed a bar
to or waiver of the same or any other right on any future occasion. 
  
 (e) The Issuer and all sureties, indorsers and guarantors of this Note, to the extent not prohibited by applicable law or regulation, hereby waive as to this debt or any renewal, modification, extension or refinancing thereof any demand,
presentment, notice of non-payment, protest, notice of protest, notice of dishonor, all other notice, suit against any party, diligence in collection of this Note, the release of any party primarily or secondarily liable thereon or any collateral
pledged as security, and all other requirements necessary to hold Issuer liable hereunder. 
  
 (f) This Note shall be governed by and construed and enforced in accordance with the laws of the State of New York without respect to its conflicts of laws principles. If any provision hereof is in conflict with any
statute or rule of law of the State of New York or any other state, or is otherwise unenforceable for any reason whatsoever, then such provision shall be deemed separable from and shall not invalidate any other provision of this Note. 
  
  
 [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK] 

 IN WITNESS WHEREOF, the Issuer has caused this Senior Subordinated Note to be duly executed and
delivered. 
  

					
	 	 	BASIN WATER, INC.
			
	 Dated: February 10, 2006
	 	 By:
	 	 /s/ Thomas C. Tekulve

	 	 	 	 	 Thomas C. Tekulve

	 	 	 	 	 Chief Financial Officer, Treasurer and SecretaryForm of Warrant issued to Aqua America, Inc.

 Exhibit 4.10 
  
 THIS WARRANT AND THE SECURITIES ISSUABLE UPON THE EXERCISE HEREOF HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933. THEY MAY NOT BE
SOLD, OFFERED FOR SALE, PLEDGED, HYPOTHECATED, OR OTHERWISE TRANSFERRED EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933, OR AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY THAT REGISTRATION IS NOT REQUIRED
UNDER SUCH ACT. ANY ATTEMPT TO TRANSFER, SELL, PLEDGE OR HYPOTHECATE THIS WARRANT OR THE SECURITIES ISSUABLE UPON THE EXERCISE HEREOF IN VIOLATION OF THESE RESTRICTIONS SHALL BE VOID. 
  
 THIS WARRANT AND THE SECURITIES ISSUABLE UPON THE EXERCISE HEREOF ARE ALSO SUBJECT TO MARKET STAND-OFF PROVISIONS PURSUANT TO THE TERMS OF A
REGISTRATION RIGHTS AGREEMENT. 
  
 WARRANT NO.
AQ-     
  
 VOID AFTER THE
EXPIRATION DATE (as defined below) 
  
 Warrant To Purchase
                                
(            ) 
 Shares (subject to adjustment) of Common Stock

  
 WARRANT TO PURCHASE COMMON STOCK 
  
 OF 
  
 BASIN WATER, INC., a California Corporation 
  
 This warrant (the “Warrant”) certifies that, for value received, the Warrant Holder is entitled,
subject to the terms set forth below, to purchase from the Company the number set forth above of fully paid and nonassessable Shares at the Share Price at any time or from time to time from the Original Issue Date to and including the Expiration
Date such price and number of shares being subject to adjustment as provided herein. The right to exercise this Warrant is subject to the terms and conditions set forth in Section 3 and shall expire at the close of business on the Expiration
Date. 
  
 1. DEFINITIONS. As used in this Warrant, the following
terms, unless the context requires otherwise, have the following meanings: 
  
 1.1 “Change of Control” means (a) a consolidation, merger or other business combination of the Company with and into another corporation unless the Company’s shareholders of record
immediately prior to such consolidation, merger or business combination shall hold at least fifty percent (50%) of the voting power of the acquiring corporation or surviving entity immediately after such consolidation, merger or business
combination or (b) the sale of all or substantially all of the Company’s assets to a third party that is not affiliated with the Company prior to such sale. 

 1.2 “Company” means Basin Water, Inc., a California corporation, and any
corporation that shall succeed to or assume the obligations of Basin Water, Inc. under this Warrant. 
  
 1.3 “Common Stock,” when used with reference to stock of the Company, means all shares, now or hereafter authorized, of the class
of the Common Stock of the Company presently authorized and stock of any other class into which those shares may later be changed. 
  
 1.4 “Corporations Code” refers to the sections of the California Corporations Code. 
  
 1.5 “Expiration Date” means the earliest of
(i)                     , 20    , (ii) thirty (30) months after the Initial Public Offering and
(iii) immediately prior to the closing of a Change of Control. 
  
 1.6 “Initial Public Offering” has the meaning set forth in the Purchase Agreement. 
  
 1.7 “Note” has the meaning set forth in the Purchase Agreement. 
  
 1.8 “Opinion of Counsel” means a written opinion, signed by legal counsel, who may be an employee
of, or of counsel to, the Company or other counsel satisfactory to the Company. 
  
 1.9 “Original Issue Date” means                     ,
200    . 
  
 1.10 “Purchase
Agreement” means that certain Subordinated Note with Warrants Purchase Agreement dated as of the Original Issue Date between the Company and the Warrant Holder. 
  
 1.11 “Registration Rights Agreement” means that certain registration rights agreement dated as of
the date hereof between the Company and the Warrant Holder. 
  
 1.12 “Securities Act” means the Securities Act of 1933, or any similar federal statute, and the rules and regulations of the Securities and Exchange Commission, or any other federal agency then administering the
Securities Act, under that legislation, all as they may be in effect at the time. 
  
 1.13 “Shares” shall mean the shares of Common Stock, subject to adjustment as provided herein. 
  
 1.14 “Share Price” shall mean the price per share of
                     ($            ), payable in United States currency,
subject to adjustment as provided herein. 
  
 1.15
“Subscription” means the form attached hereto as Exhibit A and incorporated herein by reference. 
  

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 1.16 The term “Warrant Holder,” or similar terms when the context refers to a
holder of the Warrants, means Aqua America, Inc., its permitted assigns, and/or anyone who at the time is the registered holder of the Warrant. 
  
 2. FEDERAL SECURITIES REGULATION 
  
 2.1 Representations. The Warrant Holder represents, by accepting this Warrant, that it is an “accredited investor” as that
term is defined in Rule 501 promulgated under the Securities Act and understands that this Warrant and any securities issuable upon exercise of this Warrant have not been registered for sale under Federal or state securities laws or “Blue
Sky” laws and are being offered and sold to the Warrant Holder pursuant to one or more exemptions from the registration requirements of such securities laws. The Warrant Holder further understands that the Shares have not been qualified
under any state securities laws based on the belief that they have been issued in a transaction exempt from the qualification requirements of such securities laws, which exemption depends upon, among other things, Warrant Holder’s
representations made herein. The Warrant Holder further represents to the Company that it is acquiring this Warrant and will acquire any securities issuable upon exercise of this Warrant for its own account for investment and not with a view to, or
for sale in connection with, any distribution thereof in violation of the Securities Act, and agrees that this Warrant and any such securities will not be sold or otherwise transferred unless (i) a registration statement with respect to such
transfer is effective under the Securities Act and any applicable state securities laws or “Blue Sky” laws or (ii) this Warrant or any such securities are (x) sold or otherwise transferred only to a transferee that
(A) is a subsidiary, parent, partner, limited partner, retired partner or shareholder of such Warrant Holder or (B) is acquiring at least one hundred thousand (100,000) Shares (subject to appropriate adjustments for stock splits,
stock dividends, combinations and other recapitalizations) and (y) the Warrant Holder has delivered to the Company an Opinion of Counsel reasonably satisfactory to the Company, at Warrant Holder’s expense, that such sale or transfer is
made pursuant to one or more exemptions from the Securities Act pursuant to Section 2.3 below. The Warrant Holder recognizes that an investment in the Warrants and the Shares issuable upon exercise thereof involves a high degree of risk,
including a risk of total loss of the Warrant Holder’s investment. The Warrant Holder is able to bear the economic risk of holding the Warrant and the Shares issuable upon exercise thereof, for an indefinite period, has knowledge and experience
in the financial and business matters such that it is capable of evaluating the risks of the investment in the Warrant and the Shares issuable upon exercise thereof, has been furnished ample opportunity to request information regarding the Company
and has been afforded the opportunity to ask questions of and receive answers from officers or other representatives of the Company concerning the Company, and, assuming the Company has been responsive to the Warrant Holder’s requests and
questions, has received all the information it has requested from the Company and considers necessary or appropriate for deciding whether to purchase its Warrant. 
  
 2.2 Non-Registered Securities. The sale or other transfer of the Warrant is greatly restricted because the Warrant
will not be registered for sale under the Securities Act or qualified for sale under any state securities laws, and may therefore have to be held indefinitely unless subsequently registered under the Securities Act and qualified under applicable
state laws or an exemption from such registration or qualification is available. No market may exist for the 
  

 3 

 Warrant, and it is unlikely that any substantial market will develop. Investors who do not wish or who are financially
unable to remain as Warrant Holders for a substantial period of time are advised against investment in the Warrant offered hereby. No market for the resale of the Warrant is expected to develop in the foreseeable future. 
  
 2.3 Restriction on Transferability of Warrants. The Shares authorized
under the Warrant are “Restricted Securities” as that term is defined in Rule 144 under the Securities Act, and accordingly, the Shares must be held unless they are subsequently registered under the Securities Act and
qualified under any applicable state securities laws or exemptions from such registration or qualification are available. Prior to any proposed transfer of this Warrant or the Shares issued upon exercise of this Warrant, the Warrant Holder and each
subsequent permitted Warrant Holder shall give written notice to the Company of such Warrant Holder’s intention to effect such transfer, which notice shall contain the details of such proposed transfer including the proposed transferee. The
transfer of this Warrant shall be conditioned upon the transferee’s agreement in writing to be subject to the terms of this Warrant. If, at the time of any exercise, transfer, or surrender for exchange of any of this Warrant or of Shares issued
upon exercise of the Warrant, such Warrant or Shares are not registered under the Securities Act, the Company may require, as a condition to allowing that exercise, transfer, or exchange, that the Warrant Holder or transferee of this Warrant or
Shares, furnish to the Company such information as, in the Opinion of Counsel, is necessary to establish that the exercise, transfer, or exchange may be made without registration under the Securities Act. That information shall include a written
statement that the Warrant Holder is purchasing the Shares or that the transferee is acquiring the Warrant or Shares for such holder’s or transferee’s own account, for investment and not with a view to the sale or distribution of the
Warrant or Shares nor with any then-present intention of distributing or selling the Warrant or Shares. Any such Warrant or Shares certificate may, at the Company’s sole option and discretion, include any legend considered necessary or
desirable to comply with the Securities Act, including the following: 
  
 THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933. THEY MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED, HYPOTHECATED, OR OTHERWISE TRANSFERRED EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933, OR AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY THAT REGISTRATION IS NOT REQUIRED UNDER SUCH ACT. ANY ATTEMPT TO TRANSFER, SELL, PLEDGE OR HYPOTHECATE THE SECURITIES REPRESENTED HEREBY IN VIOLATION OF THESE
RESTRICTIONS SHALL BE VOID. 
  
 THE SECURITIES REPRESENTED HEREBY
ARE ALSO SUBJECT TO MARKET STAND-OFF PROVISIONS PURSUANT TO THE TERMS OF A REGISTRATION RIGHTS AGREEMENT. 
  

 4 

 3. EXERCISE OF THE WARRANT 
  
 3.1 Exercising Rights Under the Warrant. 
  
 (a) Cash Exercise. A Warrant Holder may exercise it in full by surrender of this Warrant, with the Subscription, duly
executed by the Warrant Holder, to the Company at its principal office at 8731 Prestige Court, Rancho Cucamonga, CA 91730, accompanied by payment in the amount obtained by multiplying the Share Price (as adjusted pursuant to Section 4) by the
number of Shares specified on the face of this Warrant (as adjusted pursuant to Section 4). The exercise of this Warrant shall be deemed to have been effected two (2) business days after the receipt by the Company of the Warrant with the
Subscription or such later time as may be requested by the Warrant Holder in any transmittal letter. Notwithstanding the foregoing, in the event this Warrant is exercised within two business days of the Expiration Date, the exercise of this Warrant
shall be deemed to have been effected immediately prior to the close of business on the date on which the Warrant and Subscription are received by the Company. 
  

(b) Form of Payment. Payment for Shares may be in cash or by cashier’s or certified check payable to the order of the Company. 

 
 (c) Partial Exercise. The Warrant Holder may exercise in part by
surrendering the Warrant, with the Subscription duly executed by the Warrant Holder, to the Company at its principal office, accompanied by payment as provided above, except that the amount payable by the Warrant Holder on such partial exercise
shall be the amount obtained by multiplying the Share Price (as adjusted pursuant to Section 4) by the number of Shares, not to exceed the number specified on the face of this Warrant (as adjusted pursuant to Section 4), designated by the
Warrant Holder in the Subscription. On partial exercise, the Company shall promptly issue and deliver to the Warrant Holder a new Warrant or Warrants of like tenor in the name of that Warrant Holder, providing for the right to purchase that number
of Shares for which this Warrant has not been exercised. 
  
 (d)
Company’s Obligations Upon Exercise. At the time this Warrant is exercised, the Company will, at the Warrant Holder’s request, acknowledge in writing its continuing obligation to afford to that Warrant Holder any rights to which
that Warrant Holder shall continue to be entitled after such exercise in accordance with this Warrant, provided that, if the Warrant Holder fails to make such request, that failure shall not affect the Company’s continuing obligation to
afford to such Warrant Holder any such rights. 
  
 3.3 Delivery
of Stock Certificate. As soon as possible after full or partial exercise of this Warrant, the Company at its expense will cause to be issued in the name of, and delivered to the Warrant Holder, a certificate or certificates for the number of
duly authorized, fully paid and nonassessable Shares to which that Warrant Holder shall be entitled on such exercise, together with any other securities and property to which that Warrant Holder is entitled on such exercise under the terms of this
Warrant. No fractional share will be issued upon exercise of rights to purchase under this Warrant. If on any exercise of this Warrant, a fraction of a share results, the Company will pay the cash value of that fractional share, calculated on the
basis of the fair market value of one Share as determined in good faith by the Board of Directors of the 
  

 5 

 Company. The Company covenants and agrees that it will pay when due and payable any and all federal and state transfer
taxes and charges which may be payable in respect of the issuance or delivery of the Shares to the Warrant Holder pursuant to this Section 3.3; provided that, the Company will not be liable for any federal or state transfer taxes and
charges payable in respect of the transfer of the Warrant, or Shares issuable upon exercise thereof, by the Warrant Holder to any other person. 
  
 4. ANTIDILUTION PROVISIONS 
  
 4.1 Stock Splits and Combinations. If the Company at any time subdivides or combines its outstanding shares of Common Stock, whether by stock
split, stock dividend or the like, this Warrant shall, after that subdivision or combination, be evidence of the right to purchase the number of Shares that would have been issuable as a result of that change with respect to the Shares that were
purchasable under this Warrant immediately before that subdivision or combination. If the Company at any time subdivides the outstanding shares of Common Stock, the Share Price then in effect immediately before that subdivision shall be
proportionately decreased, and, if the Company at any time combines the outstanding shares of Common Stock, the Share Price then in effect immediately before that combination shall be proportionately increased. Any adjustment under this provision
shall become effective at the close of business on the date the subdivision or combination becomes effective. 
  
 4.2 Reclassifications, Exchanges, and Substitutions. 
  
 (a) If the Common Stock issuable upon exercise of this Warrant is changed into the same or a different number of shares of any other class or classes of
stock, whether by capital reorganization, reclassification or otherwise, other than a subdivision or combination of shares provided for above, the Warrant Holder shall, on the exercise of the Warrant, be entitled to purchase, in lieu of the Common
Stock that such Warrant Holder would have become entitled to purchase but for such change, a number of shares of such other class or classes of stock equivalent to the number of Shares of Common Stock that would have been subject to purchase by the
Warrant Holder on exercise of this Warrant immediately before that change. 
  
 (b) If at any time there is a capital reorganization of the Common Stock (other than a transaction covered by Sections 4.1 or 4.2(a) or a reincorporation of the Company in another jurisdiction by means of a merger
with a subsidiary of the Company), or a Change of Control, then, as a part of such reorganization or Change of Control, the Company shall give the Warrant Holder at least thirty (30) days’ prior written notice, by first class mail, postage
prepaid, of such event. Warrant Holder shall have the right to exercise this Warrant in whole or part, pursuant to the terms hereof, prior to such event. If Warrant Holder does not exercise this Warrant in full prior to a Change of Control (but not
a capital reorganization), then the Warrant Holder’s rights hereunder shall cease and be of no further force or effect. If the Warrant Holder does not exercise this Warrant in full prior to a reorganization, in such case, appropriate
adjustment, as determined by the Company’s Board of Directors, shall be made in applying this Warrant to the rights and interests of the Warrant Holder after the reorganization to the end that this Warrant, including adjustment of the Share
Price then in effect and number of shares purchasable on exercise of this Warrant, shall be applicable after that event, as near as 
  

 6 

 reasonably may be, in relation to any Shares or other property deliverable after that event on exercise of this Warrant.
The Company shall within thirty (30) days after making such adjustment, give written notice, by first class mail, postage prepaid, to the registered Warrant Holder at the address of that Warrant Holder, as shown on the Company’s books.
That notice shall set forth, in reasonable detail, the event requiring the adjustment and the method by which the adjustment was calculated and shall specify the Share Price then in effect after the adjustment and the increased or decreased number
of purchasable Shares on exercise of this Warrant. 
  
 4.3
Prior Notice. If: (a) the Company shall declare any dividend payable in Common Stock (other than a dividend in Common Stock triggering the adjustment provisions set forth in Section 4.1 above) or make any other distribution to the
holders of its Common Stock, or a cash distribution; (b) the Company shall offer for subscription pro rata to the holders of its Common Stock any additional shares of stock of any class or any other rights; (c) there shall be a voluntary
or involuntary dissolution, liquidation, or winding up of the Company; (d) there is a capital reorganization of the Common Stock (other than a transaction covered by sections 4.1 or 4.2(a) or a reincorporation of the Company in another
jurisdiction by means of a merger with a subsidiary of the Company); or (e) there shall be a Change of Control: 
  
 Then, in each such case the Company shall give at least fifteen (15) days’ prior written notice to the registered Warrant Holder at the address
of that Warrant Holder shown on the books of the Company, of the date as of which the books of the Company shall close or a record shall be taken for such stock dividend, distribution or subscription rights, or the date as of which the dissolution,
liquidation, winding up, reorganization or Change of Control shall take place. That notice also shall specify the date as of which the holders of the Common Stock of record shall either participate in that dividend, distribution, or subscription
rights or shall be entitled to exchange their Common Stock for securities or other property deliverable on such dissolution, liquidation, or winding up, on which date, in the event of a voluntary or involuntary dissolution, liquidation, or winding
up of the Company, the right to exercise this Warrant shall cease. The right to exercise this Warrant shall cease as of the effective date for a Change of Control. 
  
 4.4 Additional Issuances of Stock. Until the Initial Public Offering, the Share Price for the Shares shall be subject
to adjustment as follows: 
  
 (a) After the Original Issue Date,
if the Company shall issue or sell any shares of Common Stock (“Additional Shares”) for a consideration per share less than the Share Price in effect immediately prior to such issue or sale, then immediately upon such
issue or sale, the Share Price shall automatically be adjusted to a price equal to the price paid per share in such sale or issue. 
  
 (b) For purposes of Section 4.4(a) above, none of the following issuances occurring after the Original Issue Date shall be considered the issuance or
sale of “Additional Shares”: 
  
 (i) The issuance of
Common Stock upon the exercise of Options (as defined below) or the issue of shares of Common Stock upon the conversion or exchange of Convertible Securities (as defined below). “Convertible Securities” shall mean any bonds,

  

 7 

 debentures, notes or other evidences of indebtedness, shares or any other securities directly or indirectly convertible
into, exercisable for, or exchangeable for Common Stock, but excluding Options. “Options” shall mean rights, options or warrants to subscribe for, purchase or otherwise acquire Common Stock or Convertible Securities;

  
 (ii) The issuance of any Common Stock or Convertible
Securities as a dividend on the Company’s stock; provided that, such dividend of Common Stock results in an adjustment pursuant to Sections 4.1 or 4.2(a); 
  

(iii) The issuance of up to 2,500,000 shares of Common Stock (or options to purchase shares of Common Stock) to employees, directors or consultants of
the Company under a stock option or incentive plan approved by the Board of Directors of the Company; 
  
 (iv) The issuance of Common Stock or Convertible Securities pursuant to the acquisition of another business by the Company by merger, purchase of
substantially all of the assets or shares, or other reorganization whereby the Company or its shareholders own not less than a majority of the voting power of the surviving or successor business; 
  
 (v) The issuance of any other Common Stock or Convertible Securities (other
than pursuant to Section 4.4(b)(i) through (iv)) in one or more transactions for which the Company receives an aggregate consideration of less than One Million Dollars ($1,000,000) in any rolling six (6) month period; 
  
 (c) For purposes of Section 4.4 (a) above, the following events
shall constitute the issuance of “Additional Shares”: 
  
 (i) If the Company at any time or from time to time after the Original Issue Date shall issue any Options or Convertible Securities (excluding Options or Convertible Securities which, upon exercise, conversion or exchange thereof, would
entitle the holder thereof to receive shares of Common Stock which are specifically excepted from the definition of Additional Shares by Section 4.4(b) above) or shall fix a record date for the determination of holders of any class of
securities entitled to receive any such Options or Convertible Securities, then the maximum number of shares of Common Stock (as set forth in the instrument relating thereto without regard to any provision contained therein for a subsequent
adjustment of such number) issuable upon the exercise of such Options or, in the case of Convertible Securities and Options therefor, the conversion or exchange of such Convertible Securities, shall be deemed to be Additional Shares issued as of the
time of such issue or, in case such a record date shall have been fixed, as of the close of business on such record date. 
  
 (ii) If the terms of any Option or Convertible Security, the issuance of which resulted in an adjustment to the Share Price pursuant to the terms of
Section 4.4(a) above, are revised (either automatically pursuant to the provisions contained therein or as a result of an amendment to such terms) to provide for either (1) any increase in the number of shares of Common Stock issuable upon
the exercise, conversion or exchange of any such Option or Convertible Securities or (2) any decrease in the consideration payable to the Company upon such exercise, conversion or exchange, then, effective upon such increase or decrease
becoming effective, the Share Price 
  

 8 

 computed upon the original issue of such Option or Convertible Security (or upon the occurrence of a record date with
respect thereto) shall be readjusted to such Share Price as would have been obtained had such revised terms been in effect upon the original date of issuance of such Option or Convertible Security. 
  
 (iii) If the terms of any Option or Convertible Security (excluding those
specifically exempted from the definition of Additional Shares by Section 4.4 (b) above), the issuance of which did not result in an adjustment to the Share Price pursuant to the terms of Section 4.4 (a) above (either because the
consideration per share (determined pursuant to Section 4.4 (d)) of the Additional Shares subject thereto was equal to or greater than the Share Price then in effect, or because such Option or Convertible Security was issued before the Original
Issue Date), are revised after the Original Issue Date (either automatically pursuant to the provisions contained therein or as a result of an amendment to such terms) to provide for either (1) any increase in the number of shares of Common
Stock issuable upon the exercise, conversion or exchange of any such Option or Convertible Security or (2) any decrease in the consideration payable to the Company upon such exercise, conversion or exchange, then such Option or Convertible
Security, as so amended, and the shares of Common Stock subject thereto shall be deemed to be Additional Shares (determined in the manner provided in Section 4.4 (d)) and shall be deemed to have been issued effective upon such increase or
decrease becoming effective. 
  
 (d) For purposes of
Section 4.4 (a) above, the consideration received by the Company for the issue of any Additional Shares shall be computed as follows: 
  
 (i) Cash and Property: Such consideration shall: 
  

	 	(A)	insofar as it consists of cash, be computed at the aggregate of cash received by the Company, excluding amounts paid or payable for accrued interest; 

  

	 	(B)	insofar as it consists of property other than cash, be computed at the fair market value thereof at the time of such issue, as determined in good faith by the Company’s Board
of Directors; and 

  

	 	(C)	in the event Additional Shares are issued together with other shares or securities or other assets of the Company for consideration which covers both, be the proportion of such
consideration so received, computed as provided in clauses (A) and (B) above, as determined in good faith by the Company’s Board of Directors. 

  

 9 

 (ii) Options or Convertible Securities. The consideration per share received by the Company for
the issue of Options or Convertible Securities (or Options with respect thereto) deemed to constitute the issuance of Additional Shares pursuant to Section 4.4(c), shall be determined by dividing 
  

	 	(A)	The total amount, if any, received or receivable by the Company as consideration for the issue of such Options or Convertible Securities, plus the minimum aggregate amount of
additional consideration (as set forth in the instruments relating thereto, without regard to any provision contained therein for a subsequent adjustment of such consideration) payable to the Company upon the exercise, conversion or exchange of such
Option of Convertible Securities for Common Stock, or in the case of Options for Convertible Securities, the exercise of such Options and the conversion or exchange of such Convertible Securities for Common Stock, by 

  

	 	(B)	The maximum number of shares of Common Stock (as set forth in the instruments relating thereto, without regard to any provision contained therein for a subsequent adjustment of such
number) issuable upon the exercise, conversion or exchange of such Options or Convertible Securities, or in the case of Options for Convertible Securities, the exercise of such Options and the conversion or exercise of such Convertible Securities.

  
 4.5 Good Faith Provision. The Company
covenants that it will not intentionally avoid or intentionally seek to avoid the observance or performance of any of the terms of this Warrant, but it will at all times in good faith assist in carrying out all those terms and take all action
necessary or appropriate to protect the rights of the Warrant Holder against dilution or other impairment. 
  
 5. Miscellaneous Provisions 
  
 5.1 Reservation of Stock. The Company covenants that it will at all times reserve and keep available, solely for issuance on exercise of this Warrant, all Shares of Common Stock or other securities from time to
time issuable upon exercise of this Warrant. 
  
 5.2
Replacement. On receipt of evidence reasonable satisfactory to the Company of the loss, theft, destruction, or mutilation of this Warrant and, in the event of such occurrence, on delivery of an indemnity agreement or bond reasonably
satisfactory in form and amount to the 
  

 10 

 
Company or, in the case of mutilations, on surrender and cancellation of this Warrant, the Company, at the Warrant Holder’s expense, will execute and
deliver, in lieu of this Warrant, a new Warrant of like tenor. 
  
 5.3 Transfer. Warrant Holder may assign this Warrant for the aggregate number of Shares that have not been previously exercised, but in no event in excess of the number of Shares set forth on the first page of this Warrant (as
adjusted pursuant to Section 4), subject to compliance with the other terms and conditions hereof. On surrender of this Warrant for assignment, properly endorsed on a form of assignment acceptable to the Company, and subject to the provisions
of this Warrant regarding compliance with the Securities Act (including delivery of an Opinion of Counsel), the Company, at its expense, will issue a new Warrant, in such name as the Warrant Holder, on payment by the Warrant Holder of any applicable
transfer taxes, may direct, calling in the aggregate on the face of such Warrant for the number of Shares of Common Stock that have not been previously exercised hereunder; provided, however, that the rights of the Warrant Holder under
the Registration Rights Agreement may be assigned by the Warrant Holder only to a transferee that (i) is a subsidiary, affiliate, parent, partner, limited partner, retired partner or shareholder of such Warrant Holder, or (ii) is acquiring
at least one hundred thousand (100,000) Shares (subject to appropriate adjustment for stock splits, stock dividends, combinations and other recapitalizations) from the Warrant Holder. 
  
 5.4 Warrant Agent. The Company may, on written notice to the Warrant
Holder, appoint an agent for the purpose of issuing Common Stock or other securities on the exercise of this Warrant and of replacing or exchanging this Warrant; and after that appointment occurs, any such issuance, replacement or exchange shall be
made at that office by that agent. 
  
 5.6 No Rights as a
Shareholder. No Warrant Holder, as such, shall be entitled to vote or receive dividends or be considered a shareholder of the Company for any purpose, nor shall anything in this Warrant be construed to confer on any Warrant Holder, as such, any
rights of a shareholder of the Company or any right to vote, to give or withhold consent to any corporate action (whether upon any recapitalization, issuance of stock, reclassification of stock, change of stock to par value, consolidation, merger,
conveyance or otherwise), to receive notice of meetings of shareholders, or to receive dividends or subscription rights. 
  
 5.7 Modification. Except as otherwise provided in this Warrant, neither this Warrant nor any provision hereof may be waived, modified, amended,
discharged, or terminated except by an instrument in writing signed by the party against which the enforcement of such waiver, modification, amendment, discharge or termination is sought, and then only to the extent set forth in such writing.

  
 5.8 Controlling Law. This Warrant shall be
governed by, and construed and interpreted in accordance with, the laws of the State of New York, without giving effect to any choice-of-law or conflicts-of-laws rule or principle that would result in the application of any other laws.

  
 5.9 Registration Rights and Obligations. The
Warrant Holder is party to the Registration Rights Agreement, pursuant to which the Warrant Holder will be entitled to certain 

  

 11 

 
rights to request the registration of the sale of the Shares under the Securities Act, subject to the terms and conditions provided therein. Pursuant to the
Registration Rights Agreement, the Common Stock issuable pursuant to the terms of this Warrant is subject to market stand-off restrictions as set forth therein. 
  

5.10 Headings. Headings, titles and captions are for convenience only and shall not constitute a portion of this Warrant or be used for the
interpretation thereof. 
  
 5.11 Notices. Any notice,
approval, consent, waiver or other communication required or permitted to be given or to be served upon the Warrant Holder or the Company in connection with this Warrant shall be in writing. Such notice shall be personally served, sent by facsimile,
or sent prepaid by registered or certified mail with return receipt requested, or sent by reputable overnight delivery service, such as Federal Express, and shall be deemed given: (a) if personally served, when delivered to the individual or
entity to whom such notice is addressed; (b) if given by facsimile, one day after being sent; (c) if given by prepaid or certified mail with return receipt requested, forty-eight (48) hours after being deposited in the U.S. mail; or
(d) if sent by reputable overnight delivery service, such as Federal Express, one business day after delivery to such delivery service. Any notice given by facsimile shall be confirmed in writing, and such confirmation shall be delivered or
sent by any of the other means of delivery set forth in this Section, within forty-eight (48) hours after notice was sent by facsimile. Such notices shall be addressed to the individual or entity to whom such notice is to be given at the
individual or entity’s address set forth below such individual or entity’s name on the signature page hereof or as such individual or entity shall otherwise direct in a writing to all other individuals or entities delivered or sent in
accordance with this Section. 
  

			
	 If to Company to:
	    	Basin Water, Inc.
	 	    	8731 Prestige Court
	 	    	Rancho Cucamonga, California 91730
	 	    	Attn: Peter L. Jensen, President
	 	    	Phone: (619) 222-1493
	 	    	Fax No.: (619) 222-3393

  
 If to Warrant Holder,
then to the address set forth below the name of the Warrant Holder on the signature page hereof. 
  
 5.12 Severability. If any provision of this Warrant is invalid, illegal or unenforceable, the balance of this Warrant shall remain in full force
and effect notwithstanding such invalidity, illegality, or unenforceability. 
  
 5.13 Execution in Counterparts. This Warrant may be executed in counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. The signature
page of any counterpart may be detached therefrom without impairing the legal effect of the signature(s) thereon, provided such signature page is attached to any other counterpart identical thereto except having additional signature page(s) executed
by one or more of the other individuals or entities. The Company and the Warrant Holder agree that each of them may rely upon the facsimile signature of the Company or Warrant Holder on this Warrant as constituting a duly authorized, irrevocable,
actual, current delivery of this Warrant as fully as if this Warrant contained the original ink signature of the Warrant Holder or the Company supplying a facsimile signature. 
  

 12 

 IN WITNESS WHEREOF, this Warrant is executed as of the date first above set forth. 
  

					
	COMPANY
	
	 Basin Water, Inc., a California corporation

		
	 By:
	 	  

	 Name
	 	 Thomas C. Tekulve

	 Title:
	 	 Chief Financial Officer, Treasurer
 and Secretary

	
	AQUA AMERICA, INC.
			
	 By:
	 	  

	 	,
	 Name:
	 	David P. Smeltzer
	 Title:
	 	 Chief Financial Officer and Senior Vice

	 	 	 President - Finance

					
			
	 Address:
	  	 762 West Lancaster
	 	 
	 	  	 Bryn Mawr, PA 19010
	 	 
	 	  	 Attn: General Counsel
	 	 

  

 13 

 EXHIBIT A 
  
 SUBSCRIPTION FORM 
  
 TO: Basin Water, Inc. 
  
 Capitalized terms used herein and not otherwise defined shall have the meaning assigned to them in the Warrant, dated
                    , 200     (the “Warrant”), between the undersigned and Basin Water,
Inc., a California corporation (the “Company”). 
  
 The undersigned, Warrant Holder, hereby irrevocably elects to exercise the purchase right represented by the Warrant attached hereto, and to purchase under that Warrant,
                            
(                    ) Shares of Common Stock of the Company, and herewith makes payment of
                     ($            ) per share for those Shares. As a
condition to this subscription, the undersigned hereby represents and warrants to the Company that the representations and warranties contained in Section 2.1 of the attached Warrant are true and correct as of the date of this subscription as
if they had been made on such date with respect to the Shares. The undersigned further requests that the certificates for those Shares be issued in the name of, and delivered to: 
  

			
	 Name:
	 	  

	 Address
	 	  

	 	 	  

  
 DATE:
                     
  

	
	AQUA AMERICA, INC.
	
	  

	 Name:

	 Title:

  

 14

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