Document:

exv4w3

Exhibit 4.3

THIS WARRANT AND ANY SECURITIES ACQUIRED UPON THE EXERCISE OF THIS WARRANT HAVE NOT BEEN REGISTERED
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR ANY APPLICABLE STATE SECURITIES LAWS.
NEITHER THIS WARRANT, SUCH SECURITIES NOR ANY INTEREST THEREIN MAY BE TRANSFERRED EXCEPT PURSUANT
TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE ACT AND APPLICABLE STATE SECURITIES LAWS OR
PURSUANT TO AN APPLICABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE ACT AND APPLICABLE
STATE SECURITIES LAWS.

THE SALE, ASSIGNMENT, HYPOTHECATION, PLEDGE, ENCUMBRANCE OR OTHER DISPOSITION AND VOTING OF ANY OF
THE SHARES OF COMMON STOCK OF THE COMPANY ACQUIRED PURSUANT TO THE EXERCISE OF THIS WARRANT ARE
RESTRICTED BY THE TERMS OF THE THIRD AMENDED AND RESTATED STOCKHOLDERS’ AGREEMENT, DATED AS OF JUNE
10, 2008, AMONG THE COMPANY AND CERTAIN OF ITS STOCKHOLDERS. THE COMPANY WILL NOT REGISTER THE
TRANSFER OF SUCH SHARES OF COMMON STOCK ON THE BOOKS OF THE COMPANY UNLESS AND UNTIL THE TRANSFER
HAS BEEN MADE IN COMPLIANCE WITH THE TERMS OF THE STOCKHOLDERS AGREEMENT, A COPY OF WHICH WILL BE
PROVIDED AT NO COST TO THE HOLDER HEREOF UPON WRITTEN REQUEST TO THE COMPANY.

 

ASPEN AEROGELS, INC.

COMMON STOCK PURCHASE WARRANT

 

          This document (this “Warrant”) certifies that, for good and valuable consideration, Aspen
Aerogels, Inc., a Delaware corporation (the “Company”), grants to [IMPORT WARRANTHOLDER], or any
successor or permitted assign of such Person (the “Warrantholder”), the right to subscribe for and
purchase from the Company, on or before the Expiration Time (as defined below), up to [IMPORT SHARE
NUMBERS] validly issued, fully paid and nonassessable shares of Common Stock of the Company (as may
be adjusted, the “Warrant Shares”) at the exercise price per share of $0.001 (the “Exercise
Price”), all subject to the terms, provisions, conditions and adjustments (including adjustments to
number of shares and Exercise Price) herein set forth. The Company acknowledges that the cash
consideration paid by Warrantholder for this Warrant is $10.00 for income tax purposes, that such
amount has been duly received by the Company, and that this Warrant is one of the Warrants issued
in connection with that Note Purchase Agreement dated February 24, 2005 entered into by and between
Company as the obligor and certain purchasers named therein (the “Financing Arrangement”) and that
this Warrant amends and restates all warrants previously issued to the Warrantholder in connection
with the Financing Agreement. Capitalized terms used herein which are not specifically defined in
other sections of this Warrant, shall have the meanings set forth in Section 10.

 

 

     1. Warrant Term. The purchase rights represented by this Warrant are
exercisable, in whole or in part, at any time and from time to time, from and after the Warrant
grant date and on or prior to the earlier of (i) [IMPORT EXPIRATION TIME] or (ii) the fourth
(4th) anniversary following the consummation of a QPO (such earlier date being the
“Expiration Time”).

     2. Exercise of Warrant; Payment of Taxes.

          2.1 Exercise of Warrant. The purchase rights represented by this Warrant may be
exercised by the Warrantholder, in whole or in part and from time to time, by the surrender of this
Warrant (with a duly executed notice of exercise form, the “Exercise Form”, in the form attached
hereto as Exhibit A) at the principal office of the Company and by the payment to the
Company of an amount equal to the then applicable Exercise Price per share multiplied by the number
of Warrant Shares then being purchased. If the Warrantholder is not already a party thereto, the
Warrantholder shall also execute, upon request from the Company, a joinder agreement as an Investor
to the Stockholders’ Agreement, as amended and restated, such joinder agreement to be in form and
substance mutually agreeable to both the Warrantholder and the Company. The Warrantholder shall be
deemed to have become the holder(s) of record of, and shall be treated for all purposes as the
record holder(s) of, the Warrant Shares represented thereby (and such Warrant Shares shall be
deemed to have been issued) immediately prior to the close of business on the date or dates upon
which this Warrant is exercised.

          2.2 Net Exercise.

          (a) In lieu of payment in cash, the rights represented by this Warrant may also be
exercised at any time by a written notice of exercise in the form of Exhibit A attached
hereto, providing for the net exercise of this Warrant for the Warrant Shares equal to the value
(as determined below) of this Warrant (or the portion thereof being exercised), specifying that
this net exercise election has been made, and the net number of Warrant Shares to be issued after
giving effect to such net exercise. In the event the Warrantholder makes such election, Company
shall issue to the Warrantholder a number of Warrant Shares computed using the following formula:

	 	 	 	 	 

	X

	 	=
	 	Y(A-B)
	 
	 	 	 	 
	 

	 	 	 	A

Where:

X = the number of Warrant Shares to be issued to the Warrantholder

Y = the number of Warrant Shares purchasable under the Warrant or, if only a portion of the Warrant
is being exercised, the portion of the Warrant being exercised (as of the date of such net
exercise)

A = the Fair Market Value of one Share of Common Stock (as of the date of such net exercise)

B = Exercise Price of one Share of Common Stock (as adjusted to the date of such net exercise)

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          (b) For purposes of this Section 2.2, the “Fair Market Value” of one share
of the Company’s Common Stock shall be equal to either (i) if the exercise of this Warrant occurs
in connection with an initial public offering of the Company, then the Fair Market Value shall be
equal to the “initial price to public” specified in the final prospectus with respect to the
initial public offering, or (ii) if the exercise of this Warrant occurs after an initial public
offering of the Company but not in connection therewith, then the Fair Market Value shall be equal
to the average of the closing price(s) of the Company’s Common Stock as quoted over the counter or
on any exchange on which the Common Stock is listed as such closing prices are published in The
Wall Street Journal for the fifteen (15) trading days (or such lesser number of trading days as
the stock may have been actually trading) ending on the day prior to the date of determination of
Fair Market Value. Notwithstanding the foregoing, if the Warrant is exercised in connection with a
merger or sale of all or substantially all of the Company’s assets, Fair Market Value shall mean
the value that would have been allocable to or received in respect of a Warrant Share had the
Warrant been exercised prior to such merger or sale. If the Common Stock is not traded Over The Counter or on an exchange, or if the Warrant is not
exercised in connection with a merger or sale of all or substantially all of its assets, then the
Fair Market Value shall be reasonably determined in good faith by the Board of Directors. If the
Warrantholder hereof does not agree with the determination of Fair Market Value as determined by
the Board of Directors, the Company and the Warrantholder hereof shall negotiate an appropriate
Fair Market Value. If after ten (10) days, the Company and the Warrantholder cannot agree, then
the Warrantholder may request that the Fair Market Value be determined by an investment banker of
national reputation selected by the Company and reasonably acceptable to the Warrantholder. The
fees and expenses of such investment banker shall be borne by the Company unless the Fair Market
Value determined by such investment banker is equal to or less than the Fair Market Value as
determined by the Company, in which event the fees and expenses of such investment banker shall be
borne by the Warrantholder hereof.

          2.3 Automatic Exercise. Immediately before the expiration or termination of this
Warrant, to the extent this Warrant is not previously exercised, and if the Fair Market Value of
one share of the Company’s Common Stock subject to this Warrant is greater than the Exercise Price,
then in effect as adjusted pursuant to this Warrant, this Warrant shall be deemed automatically
exercised pursuant to Section 2.2 above, even if not surrendered. For purposes of such
automatic exercise, the Fair Market Value of the Company’s Common Stock upon such expiration shall
be determined pursuant to Section 2.2 (b) above. To the extent this Warrant or any portion
thereof is deemed automatically exercised pursuant to this Section, the Company agrees to promptly
notify the Warrantholder of the number of Warrant Shares, if any, the Warrantholder hereof is to
receive by reason of such automatic exercise.

          2.4 Exercise in Connection with an Initial Public Offering, Sale or Merger.
Notwithstanding any other provision hereof, if the exercise of all or any portion of this Warrant
is made or to be made in connection with the occurrence of a public offering, sale or merger of the
Company, the exercise of all or any portion of this Warrant shall, at the election of the
Warrantholder, be conditioned upon the consummation of the public offering, sale or merger of the
Company in which case such exercise shall not be deemed to be effective until the consummation of
such transaction. In the event that transaction is not consummated within forty-five (45) days of
the targeted date of the transaction, any such exercise shall, at the election of the
Warrantholder, be deemed rescinded.

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          2.5 Warrant Shares Certificate. A stock certificate for the Warrant Shares
specified in the Exercise Form shall be delivered to the Warrantholder within five (5) Business
Days after receipt of the Exercise Form by the Company and payment by the Warrantholder of the
aggregate Exercise Price (or net exercise in lieu of payment as permitted in Section 2.2),
along with a check from the Company in lieu of any fractional shares which the Warrantholder would
be entitled to purchase under this Warrant. If this Warrant was exercised in part, the Company
shall, at the time of delivery of the stock certificate, deliver to the Warrantholder a new Warrant
evidencing the right to purchase the remaining Warrant Shares, which new Warrant shall in all other
respects be identical with this Warrant.

          2.6 Payment of Taxes. The Company shall pay all expenses, taxes and other
governmental charges with respect to the issue or delivery of the Warrant Shares, unless such tax
or charge is imposed by law upon the Warrantholder.

     3. Restrictions on Transfer; Restrictive Legends.

          3.1 Restrictions on Transfer. This Warrant and the Warrant Shares issuable upon
exercise of all or part of this Warrant are unregistered securities that are subject to the
restrictions on transfer imposed by the Securities Act and applicable state securities laws and may not be
offered, sold, transferred, pledged or otherwise disposed of, in whole or in part, to any Person
other than in accordance with the Securities Act and applicable state securities laws. The Warrant
Shares issuable upon exercise of all or part of this Warrant are also subject to additional
restrictions on transfer set forth in the Stockholders’ Agreement and may not be offered, sold,
transferred, pledged or otherwise disposed of, in whole or in part, to any Person other than in
accordance with the Stockholders’ Agreement.

          3.2 Restrictive Legends. Until such time as the restrictions on transfer imposed
on this Warrant by the Securities Act and applicable state securities laws shall no longer be
effective, this Warrant, any Warrant issued to the Warrantholder upon the partial exercise of this
Warrant pursuant to Section 2 shall be stamped or otherwise imprinted with a legend in
substantially the form as set forth on the cover of this Warrant. Until such time as the
restrictions on transfer imposed on the Warrant Shares by the Securities Act, applicable state
securities laws and the Stockholders’ Agreement shall no longer be effective, each stock
certificate for Warrant Shares and each stock certificate issued upon the direct or indirect
transfer of any such Warrant Shares shall be stamped or otherwise imprinted with a legend in
substantially the form provided in the Stockholders’ Agreement. Upon the termination of such
restrictions on transfer, the Warrantholder may require the Company to issue a Warrant or a stock
certificate for Warrant Shares, in each case without a legend, if and to the extent permitted by,
and in accordance with, the Stockholders’ Agreement and applicable law.

     4. Reservation and Registration of Warrant Shares. The Company covenants and
agrees as follows:

          4.1 Validly Issued and Free of Encumbrances. All Warrant Shares issued upon the
exercise of all or any part of this Warrant shall, upon issuance and payment of the Exercise Price
therefore (or upon net exercise as permitted herein), be validly issued, fully paid

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and
nonassessable, issued in compliance with all applicable federal and state securities laws, and free
from all taxes, liens and charges with respect to the issue thereof, and not subject to any
preemptive rights.

          4.2 Sufficient Authorized Shares. During the period within which the rights
represented by this Warrant may be exercised, the Company shall at all times have authorized and
reserved, for the purpose of issuance of Common Stock upon any exercise of the purchase rights
evidenced by this Warrant, and shall keep available free from preemptive rights, a sufficient
number of shares of its Common Stock to provide for the exercise of the rights represented by this
Warrant.

          4.3 Noncontravention. The Company shall not, by amendment of its Charter or
through any reorganization, transfer of assets, spin-off, consolidation, merger, dissolution, issue
or sale of securities or any other action or inaction, avoid or seek to avoid the observance or
performance of any of the terms of this Warrant to be observed or performed hereunder, and shall at
all times in good faith assist in performing, carrying out, and giving effect to the terms hereof
and in the taking of all such actions as may be necessary or appropriate in order to protect the
rights of the Warrantholder against dilution or other impairment.

     5. Anti-Dilution Adjustments. From and after the date hereof and until the
Expiration Date, notwithstanding the fact that no Warrant Shares shall be issued and outstanding,
the Exercise Price, and the number and type of Warrant Shares or other securities to be received
upon exercise of this Warrant, shall be subject to adjustment as follows:

          5.1 Issuances of Common Stock Below Exercise Price.

          (a) If the Company shall, at any time or from time to time after the Original Issuance
Date, issue any shares of Common Stock (or be deemed to have issued shares of Common Stock as
provided herein), other than Excluded Stock, without consideration or for a consideration per share
less than the Exercise Price in effect immediately prior to the issuance of such Common Stock, then
the Exercise Price, as in effect immediately prior to each such issuance, shall forthwith be
lowered to:

          (1) on or after the Operational Date, a price equal to the quotient obtained by dividing:

          (A) an amount equal to the sum of (X) the total number of shares of Common Stock Deemed
Outstanding immediately prior to such issuance, multiplied by the Exercise Price in effect
immediately prior to such issuance, and (Y) the consideration received by the Company upon such
issuance; by

          (B) the total number of shares of Common Stock Deemed Outstanding immediately after the
issuance of such Common Stock; or

          (2) until the Operational Date, the lowest price per share at which any such shares of
Common Stock have been issued or sold or deemed to have been issued or sold.

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          (b) for the purposes of any adjustment of the Exercise Price pursuant to paragraph
(a) above, the following provisions shall be applicable:

          (1) In the case of the issuance of Common Stock for cash in a public offering or private
placement, the consideration shall be deemed to be the amount of cash paid therefor after deducting
therefrom any discounts, commissions or placement fees payable by the Company to any underwriter or
placement agent in connection with the issuance and sale thereof.

          (2) In the case of the issuance of Common Stock for a consideration in whole or in part
other than cash, the consideration other than cash shall be deemed to be the fair value per share
thereof, as reasonably determined in good faith by the Board, irrespective of any accounting
treatment.

          (3) In the case of the issuance of options to purchase or rights to subscribe for Common
Stock, securities by their terms convertible into or exchangeable for Common Stock, or options to
purchase or rights to subscribe for such convertible or exchangeable securities (except for options
or rights to acquire or subscribe for Excluded Stock):

          (A) the aggregate maximum number of shares of Common Stock deliverable upon exercise of
such options to purchase or rights to subscribe for Common Stock shall be deemed to have been
issued at the time such options or rights were issued and for a consideration equal to the
consideration (determined in the manner provided in Sections 5.1(b)(1) and
5.1(b)(2) above), if any, received by the Company upon the issuance of such options or
rights plus the minimum purchase price provided in such options or rights for the Common Stock
covered thereby;

          (B) the aggregate maximum number of shares of Common Stock deliverable upon conversion of
or in exchange for any such convertible or exchangeable securities or upon the exercise of options
to purchase or rights to subscribe for such convertible or exchangeable securities and subsequent
conversion or exchange thereof shall be deemed to have been issued at the time such securities,
options or rights were issued and for a consideration equal to the consideration received by the
Company for any such securities and related options or rights (excluding any cash received on
account of accrued interest or accrued dividends), plus the additional consideration, if any, to be
received by the Company upon the conversion or exchange of such securities or the exercise of any
related options or rights (the consideration in each case to be determined in the manner
provided in Sections 5.1(b)(1) and 5.1(b)(2) above);

          (C) on any change in the number of shares or exercise price of Common Stock deliverable
upon exercise of any such options or rights or conversions of or exchanges for such securities,
other than a change resulting from the antidilution provisions thereof, the Exercise Price shall
forthwith be readjusted to the Exercise Price as would have been obtained had the adjustment made
upon the issuance of such options, rights or securities not converted prior to such change or
options or rights related to such securities not converted prior to such change been made upon the
basis of such change; and

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          (D) on the expiration of any such options or rights, the termination of any such rights to
convert or exchange or the expiration of any options or rights related to such convertible or
exchangeable securities, the Exercise Price shall forthwith be readjusted to the Exercise Price as
would have been obtained had the adjustment made upon the issuance of such options, rights,
securities or options or rights related to such securities been made upon the basis of the issuance
of only the number of shares of Common Stock actually issued upon the exercise of such options or
rights, upon the conversion or exchange of such securities, or upon the exercise of the options or
rights related to such securities and subsequent conversion or exchange thereof.

          (c) Whenever the Exercise Price is adjusted under this Section 5.1, the number of
Warrant Shares issuable on exercise hereof shall be multiplied by a fraction the numerator of which
is the Exercise Price immediately before such adjustment and the denominator is the Exercise Price
as so adjusted.

          5.2 Stock Dividends and Combinations.

          (a) If, at any time after the Original Issuance Date, the number of shares of Common Stock
outstanding is increased by a stock dividend payable in shares of Common Stock or by a subdivision
or split-up of shares of Common Stock, then, following the record date for the determination of
holders of Common Stock entitled to receive such stock dividend, subdivision or split-up, the
Exercise Price shall be decreased and the number of shares of Common Stock issuable on exercise of
this Warrant shall be increased in proportion to such increase in outstanding shares.

          (b) If, at any time after the Original Issuance Date, the number of shares of Common Stock
outstanding is decreased by a combination of the outstanding shares of Common Stock, then,
following the record date for such combination, the Exercise Price shall be increased and the
number of shares of Common Stock issuable on exercise of this Warrant shall be decreased in
proportion to such decrease in outstanding shares.

          5.3 Recapitalization, Etc. In the event of any capital reorganization of the
Company, any reclassification of the stock of the Company (other than a change in par value or from
par value to no par value or from no par value to par value or as a result of a stock dividend or
subdivision, split-up or combination of shares), or any consolidation or merger of the Company,
this Warrant shall after such reorganization, reclassification, consolidation or merger be
exercisable for the kind and number of shares of stock or other securities or property of the
Company or of the company resulting from such consolidation or surviving such merger to which the
holder of the number of shares of Common Stock deliverable (immediately prior to the time of such
reorganization, reclassification, consolidation or merger) upon exercise of this Warrant would have
been entitled upon such reorganization, reclassification, consolidation or merger. The provisions
of this clause shall similarly apply to successive reorganizations, reclassifications,
consolidations and mergers.

          5.4 De Minimis Adjustments. No adjustment in the Exercise Price shall be required
unless such adjustment would require an increase or decrease of at least 0.1% in the Exercise
Price; provided, however that any adjustments not required to be made by virtue of this sentence
shall be carried forward and taken into account in any subsequent adjustment. All

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calculations
under this Section 5 shall be made to the nearest one hundredth (1/100) of a cent or the
nearest one tenth (1/10) of a share, as the case may be.

          5.5 Statement of Adjustments. Whenever the Exercise Price shall be adjusted as
provided in this Section 5, the Company shall make available for inspection during regular
business hours, at its principal executive offices or at such other place as may be designated by
the Company, a statement, signed by its chief executive officer, showing in detail the facts
requiring such adjustment and the Exercise Price that shall be in effect after such adjustment.
The Company shall also cause a copy of such statement to be sent by first class certified mail,
return receipt requested and postage prepaid, to the Warrantholder at such Warrantholder’s address
appearing on the Company’s records. Where appropriate, such copy may be given in advance and may
be included as part of any notice required to be mailed under the provisions of Section 5.6
below.

          5.6 Notices. If the Company shall propose to take any action of the types
described in Sections 5.2, 5.3, or 5.7 the Company shall give notice to
each Warrantholder, which notice shall specify the record date, if any, with respect to any such
action and the date on which such action is to take place. Such notice shall also set forth such
facts with respect thereto as shall be reasonably necessary to indicate the effect of such action
(to the extent such effect may be known at the date of such notice) on the Exercise Price and the
number, kind or class of shares or other securities or property which shall be deliverable or
purchasable upon the occurrence of such action or deliverable upon exercise of this Warrant. In
the case of any action which would require the fixing of a record date, such notice shall be given
at least twenty (20) days prior to the date so fixed, and in case of all other action, such notice
shall be given at least thirty (30) days prior to the taking of such proposed action. Failure to
give such notice, or any defect therein, shall not affect the legality or validity of any such
action.

          5.7 Dividends. Without duplication of any other adjustment provided for in this
Section 5, at any time the Company makes or fixes a record date for the determination of
holders of Common Stock entitled to receive a dividend or other distribution payable in property or
securities of the Company other than shares of Common Stock, then, and in each such case,

          (a) the Exercise Price then in effect shall be adjusted (and any other appropriate action
shall be taken by the Company) by multiplying the Exercise Price in effect immediately prior to the
date of such dividend or distribution by a fraction, (i) the numerator of which shall be the Fair
Market Value (in all such cases under Section 5.7, as shall be determined pursuant to
Section 2.2) of Common Stock immediately prior to the date of such dividend or
distribution, less the Fair Market Value of the portion of the property or securities applicable to
one share of Common Stock so dividended or distributed, and (ii) the denominator of which shall be
the Fair Market Value of the Common Stock immediately prior to the date of such dividend or
distribution (such fraction not to be greater than one); and

          (b) the number of Warrant Shares for which this Warrant is exercisable immediately prior
to such dividend or distribution shall be adjusted (and any other appropriate actions shall be
taken by the Company) by multiplying the then-current number of Warrant Shares in effect
immediately prior to the date of such dividend or distribution by a fraction, (i) the numerator of
which shall be the Exercise Price in effect immediately prior to the date of such

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dividend or distribution, and (ii) the
denominator of which shall be the adjusted Exercise Price as determined pursuant to
Section 5.7(a) above (such fraction not to be less than one).

          Such adjustments shall be made whenever the Company makes or fixes a record date for the
determination of holders of Common Stock entitled to receive a dividend or other distribution
payable in property or securities of the Company (other than shares of Common Stock) and shall
become effective retroactively to a date immediately following the close of business on the record
date for the determination of stockholders entitled to receive such dividend or distribution.

          5.8 Waiver. In the event that holders of at least sixty-six and two thirds
percent (662⁄3%) of the Warrants, as the case may be, consent in writing to limit, or waive in its
entirety, any antidilution adjustment to which the Warrantholders would otherwise be entitled
hereunder, the Company shall not be required to make any adjustment whatsoever in excess of such
limit or at all, as the terms of such consent may dictate.

          5.9 Computations. The computations of all amounts under this Section 5
shall be made assuming all other antidilution or similar adjustments to be made to the terms of all
other securities resulting from the transaction causing an adjustment pursuant to this Section
5 have previously been made so as to maintain the relative economic interest of the Warrants
vis à vis all other securities issued by the Company..

          5.10 Par Value. The Company shall take or cause to be taken such steps as shall
be necessary to ensure that the par value per share of Common Stock is at all times less than or
equal to the Exercise Price.

     6. Transfer and Exchange. If this Warrant is presented to the Company with a
request to register a transfer or to exchange it for an equal number of Warrants of other
denominations the Company will do so.

     7. Loss or Destruction of Warrant. Subject to the terms and conditions hereof,
upon receipt by the Company of evidence reasonably satisfactory to it of the loss, theft,
destruction or mutilation of this Warrant and, in the case of loss, theft or destruction, of such
bond or indemnification as the Company may reasonably require, and, in the case of such mutilation,
upon surrender and cancellation of this Warrant, the Company will execute and deliver to the
Warrantholder a new Warrant of like tenor.

     8. Ownership of Warrant. The Company may deem and treat the Person in whose name
this Warrant is registered as the Warrantholder and owner hereof (notwithstanding any notations of
ownership or writing hereon made by anyone other than the Company) for all purposes and shall not
be affected by any notice to the contrary, until presentation of this Warrant for registration of
transfer.

     9. Amendments. Any provision of this Warrant may be amended and the observance
thereof waived only with the written consent of the Company and the Warrantholder.

     10. Definitions. As used herein, unless the context otherwise requires, the
following terms have the following respective meanings:

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          “Affiliate” means, (1) with respect to any Person, any of (a) a director,
officer or stockholder holding 5% or more of the capital stock (on a fully diluted basis) of such
Person, (b) a spouse, parent, sibling or descendant of such Person (or a spouse, parent, sibling or
descendant of any director or officer of such Person) and (c) any other Person that, directly or
indirectly through one or more intermediaries, controls, or is controlled by, or is under common
control with, another Person or (2) in any event, any Person meeting the definition of “Affiliate”
set forth in Rule 405 under the Securities Act. The term “control” includes, without limitation,
the possession, directly or indirectly, of the power to direct the management and policies of a
Person, whether through the ownership of voting securities, by contract or otherwise.

          “Board of Directors” or “Board” means the Board of Directors of the Company.

          “Business Day” means any day other than a Saturday, Sunday or a day on which national
banks are authorized by law to close in the Commonwealth of Massachusetts.

          “Charter” means the Amended and Restated Certificate of Incorporation of the Company,
as amended from time to time.

          “Common Stock” means the Company’s presently authorized Common Stock, and any stock
into or for which such Common Stock may hereafter be converted or exchanged pursuant to the Charter
of the Company as amended from time to time as provided by law and in such Charter.

          “Common Stock Deemed Outstanding” means, at any given time, the sum of (i) the number
of shares of Common Stock actually outstanding at such time, (ii) the number of shares of Common
Stock issuable upon conversion of the Preferred Stock, and (iii) the number of shares of Common
Stock issuable upon the exercise in full of all Convertible Securities whether or not the
Convertible Securities are convertible into Common Stock at such time, but shall exclude any shares
of Common Stock or Convertible Securities in the treasury of the Company or held for the account of
the Company or any of its subsidiaries.

          “Convertible Securities” means securities or obligations that are exercisable for,
convertible into or exchangeable for shares of Common Stock. The term includes options, warrants
or other rights to subscribe for or purchase Common Stock or to subscribe for or purchase other
securities that are convertible into, directly or indirectly, or exchangeable for Common Stock.

          “Excluded Stock” has the meaning set forth in the Stockholders Agreement.

          “Operational Date” means the first date on which the Company’s operations for the
production of the aerogel product meets each of the following criteria: (i) Quality — aerogel
products meet the pre-established product specifications and are moved to inventory for sale; (ii)
Quantity — one million square feet of aerogel product produced per calendar month for two
consecutive months (based upon a 20 extractor plant and adjusted accordingly for any increase in
plant capacity); and (iii) Variable costs — less than $.84 per square foot cast.

          “Original Issuance Date” means the date and time that the first Warrant is issued by
the Company.

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          “Person” means any individual, firm, corporation, partnership, limited liability
company, trust, incorporated or unincorporated association, joint venture, joint stock company,
governmental authority or other entity of any kind, and shall include any successor (by merger or
otherwise) of such entity.

          “Preferred Stock” has the meaning set forth in the Charter.

          “Purchase Agreement” means the Stock Purchase Agreement under which the Series D
Convertible Preferred Stock were issued.

          “QPO” means an underwritten public offering (underwritten by a reputable underwriter
of national reputation) of shares of Common Stock registered pursuant to the Securities Act
involving aggregate proceeds to the Company of at least $50,000,000 with an offering price per
share of at least $6.36.

          “Registration Rights Agreement” means the Third Amended and Restated Registration
Rights Agreement, dated as of June 10, 2008, as amended, among the Company and certain parties
thereto, as the same may be amended, modified or supplemented from time to time.

          “Securities Act” means the Securities Act of 1933, as amended, and the rules and
regulations of the United States Securities and Exchange Commission thereunder.

          “Stockholders’ Agreement” means the Third Amended and Restated Stockholders’
Agreement, dated as of June 10, 2008, by and among the Company and each other stockholder of the
Company party thereto, as amended from time to time.

     11. Miscellaneous Provisions.

          11.1 Entire Agreement. This Warrant, the Financing Arrangement, the Stockholders’
Agreement, the Registration Rights Agreement and the Purchase Agreement constitute the entire
agreement between the Company and the Warrantholder with respect to this Warrant.

          11.2 Binding Effect; Benefits. This Warrant shall inure to the benefit of and shall
be binding upon the Company and the Warrantholder and their respective permitted successors and
assigns. Nothing in this Warrant, expressed or implied, is intended to or shall confer on any
person other than the Company and the Warrantholder, or their respective permitted successors or
assigns, any rights, remedies, obligations or liabilities under or by reason of this Warrant.

          11.3 Section and Other Headings. The section and other headings contained in this
Warrant are for reference purposes only and shall not be deemed to be a part of this Warrant or to
affect the meaning or interpretation of this Warrant.

- 11 -

 

          11.4 Notices. All notices, demands and other communications provided for or permitted
hereunder shall be made in writing and shall be by registered or certified first-class mail, return
receipt requested, telecopier, courier service, overnight mail or personal delivery:

If to the Company:

Aspen Aerogels, Inc.

30 Forbes Road, Building B

Northborough, MA 01532

Telephone:    (508) 691-1111

Facsimile:    (508) 691-1200

Attention:    Chief Executive Officer

with a copy (which shall not constitute notice) to:

Edwards Angell Palmer & Dodge LLP

111 Huntington Avenue

Boston, MA 02199

Telephone:    (617) 951-2207

Facsimile:    (888) 325-9513

Attention:    Christopher W. Nelson, Esq.

If to the Warrantholder:

to the addressees reflected on the Warrant

register maintained by the Company

          All such notices and communications shall be deemed to have been duly given when delivered by
hand, if personally delivered; when delivered by courier or overnight mail, if delivered by
commercial courier service or overnight mail; five (5) Business Days after being deposited in the
mail, postage prepaid, if mailed; and when receipt is mechanically acknowledged, if telecopied.
Any party may, by notice given in accordance with this Section 11.4, designate another
address or Person for receipt of notices hereunder.

          11.5 Issuance Tax, Attorneys’ Fees, Notices, Successors

          (a) Issuance Tax. The issuance of certificates for shares of Common Stock upon
exercise of this Warrant shall be made without charge to the Warrantholder hereof for any issuance
tax in respect hereof, provided that the Company shall not be required to pay any tax which may be
payable in respect of any transfer involved in the issuance and delivery of any certificate in a
name other than that of the Warrantholder.

          (b) Attorneys’ Fees. In the event of an action, suit or proceeding brought under or
in connection herewith, the prevailing party therein shall be entitled to recover from, and the
other party hereto agrees to pay, the prevailing party’s costs and expenses in connection
therewith, including reasonably attorneys’ fees.

- 12 -

 

          (c) Registration Agreement. The Warrantholder shall be entitled to all of the rights
set forth in the Registration Rights Agreement, as if such terms and conditions were set forth in
this Warrant. A copy of said Registration Rights Agreement has been provided to the Warrantholder.
Simultaneously with the execution of this Warrant, the Warrantholder shall execute, at the option
of the Company, either a counterpart signature page to such Registration Rights Agreement, or an
amendment to the Registration Rights Agreement, either of which document shall add the
Warrantholder as a party thereto and give the Warrantholder all registration and other rights
(excluding demand registration rights) as and to the extent provided therein to “Investors”
thereunder. The Company and the Warrantholder hereby further agree that for the purposes of the
Registration Rights Agreement, the Warrant Shares are “Registrable Securities,” as that term is
defined in the Registration Rights Agreement.

          (d) Stockholders’ Agreement. The Warrantholder shall be entitled to all of the rights
set forth in the Stockholders’ Agreement, as if such terms and conditions were set forth in this
Warrant. A copy of said Stockholders’ Agreement has been provided to the Warrantholder.
Simultaneously with the execution of this Warrant, the Warrantholder shall execute, at the option
of the Company, either a counterpart signature page to such Stockholders’ Agreement, or an
amendment to the Stockholders’ Agreement, either of which document shall add the Warrantholder as a
party thereto and give the Warrantholder all rights and be subject to the obligations as and to the
extent provided therein to “Investors” thereunder. Company and the Purchaser hereby further agree
that for the purposes of the Stockholders’ Agreement, the Warrant Shares will be deemed to be Stock
as that term is defined in the Stockholders’ Agreement.

          11.6 Severability. Any term or provision of this Warrant which is invalid or
unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of
such invalidity or unenforceability without rendering invalid or unenforceable the terms and
provisions of this Warrant or affecting the validity or enforceability of any of the terms or
provisions of this Warrant in any other jurisdiction.

          11.7 Governing Law. All issues concerning this Warrant shall be governed by and
construed in accordance with the law of the State of Delaware, without regard to the conflicts of
law principles thereof.

          11.8 Rights as Shareholders. No Warrantholder, as such, shall be entitled to vote or
receive dividends or be deemed the holder of Common Stock or otherwise be entitled to any voting or
other rights as a shareholder of the Company, until this Warrant shall have been exercised and the
Warrant Shares purchasable upon the exercise shall have become deliverable, as provided herein.

     12. Disposition of Warrant or Shares of Common Stock. With respect to any offer, sale
or other transfer or disposition of this Warrant or any Warrant Shares acquired pursuant to the
exercise of this Warrant prior to registration of such shares, the Warrantholder hereof and each
subsequent holder of this Warrant agrees to give written notice to the Company prior thereto,
describing briefly the manner thereof, together with a written opinion of such holder’s counsel (if
reasonably requested by the Company and reasonably satisfactory to the Company) to the effect that
(i) such offer, sale or other transfer or disposition may be effected without registration or
qualification of this Warrant or such shares of Common Stock under the Securities Act as then in
effect, and (ii) indicating whether or not under the Securities Act this

- 13 -

 

Warrant or the certificates representing such shares of Common Stock to be sold or otherwise
transferred or disposed of require any restrictive legend thereon in order to ensure compliance
with the Securities Act; provided, however, that a written opinion of holder’s counsel
shall not be required in connection with any sale pursuant to Rule 144. This Warrant or the
certificates representing the shares of Common Stock thus transferred (except a transfer pursuant
to Rule 144) shall bear a legend as to the applicable restrictions on transferability in order to
insure compliance with the Securities Act, unless in the aforesaid opinion of counsel for the
holder, such legend is not required in order to insure compliance with the Securities Act. Upon
any valid transfer of this Warrant or portion thereof, Company agrees to reissue the Warrant (or
Warrants in the case of a partial transfer) and/or the Warrant Shares receivable upon the exercise
hereof, and if the legend is not required, such re-issuance shall be without said legend. Nothing
herein shall restrict the transfer of this Warrant (or any portion hereof) or the certificates
representing the Warrant Shares acquired pursuant to the exercise of this Warrant by the initial
Warrantholder hereof or any successor holder to (i) any affiliate of such holder, including without
limitation any partnership affiliated with such holder, any partner of any such partnership or any
successor corporation to the holder hereof as a result of a merger or consolidation with or a sale
of all or substantially all of the stock or assets of the holder, (ii) any Person in a public
offering pursuant to an effective registration statement under the Securities Act, (iii) to any
other Person to the extent that the transfer to such Person is exempt from the registration
requirements of the Securities Act and such Person agrees in writing to be bound by all of the
restrictions on transfer contained herein, or (iv) any Person or Persons if the holder hereof shall
also transfer or assign all or part of its interest in the Financing Arrangement, and such Person
agrees in writing to be bound by all of the restrictions on transfer contained herein
provided, however, that no such transfer may be made to any direct competitor of
the Company, which shall mean a Person engaged in the research, manufacture or sale of aerogels,
aerogel based products or insulation products. Any transfer described above must be made in
compliance with all applicable federal and state securities laws. The Company may issue stop
transfer instructions to its transfer agent in connection with the foregoing restrictions.

     13. Warrantholder’s Representations. The Warrantholder acknowledges that it has had
access to all material information concerning the Company which it has requested. The
Warrantholder also acknowledges that it has had the opportunity to, and has to its satisfaction,
questioned the officers of the Company with respect to its investment hereunder. The Warrantholder
represents that it understands that the Warrant and the Common Stock are speculative investments,
that it is aware of the Company’s business affairs and financial condition and that it has acquired
sufficient information about the Company to reach an informed and knowledgeable decision to acquire
the Warrant. The Warrantholder is purchasing the Warrant and any Common Stock issued upon exercise
thereof for investment for its own account only and not with a view to, or for resale in connection
with, any “distribution” thereof in violation of the Securities Act or applicable state securities
laws. The Warrantholder further represents that it understands that the Warrant and Common Stock
have not been registered under the Securities Act or applicable state securities laws by reason of
specific exemptions therefrom, which exemptions depend upon, among other things, the bona fide
nature of the Warrantholder’s investment intent as expressed herein. The Warrantholder is an
“accredited investor” as defined in Regulation D promulgated under the Securities Act.

- 14 -

 

     14. Company’s Representations. As a material inducement to the Warrantholder to
purchase this Warrant, the Company hereby represents and warrants that:

          (a) The Company has made all filings under applicable federal and state securities laws
necessary to consummate the issuance of this Warrant pursuant to this Agreement in compliance with
such laws, except for such filings as may be made properly after the date hereof.

          (b) The copies of any existing stock purchase agreements and investor’s rights agreements and
the Company’s charter documents and bylaws which have been furnished to Warrantholder or the
Warrantholder’s counsel reflect all amendments made thereto at any time prior to the date hereof
and are correct and complete.

          (c) With respect to the issuance of this Warrant or the issuance of the Common Stock upon
exercise of the Warrant, there are no statutory or contractual stockholders preemptive rights or
rights of refusal, except for any such rights contained in any stock purchase agreement and/or
investor’s rights agreements which have been waived. The Company has not violated any applicable
federal or state securities laws in connection with the offer, sale or issuance of any of its
capital stock, and the offer, sale and issuance of this Warrant does not require registration under
the Securities Act or any applicable state securities laws. To the best of the Company’s
knowledge, there are no agreements between the Company’s stockholders with respect to the voting or
transfer of the Company’s capital stock or with respect to any other aspect of the Company’s
affairs.

          (d) The execution, delivery and performance of this Warrant have been duly authorized by the
Company. This Warrant constitutes a valid and binding obligation of the Company, enforceable in
accordance with its terms. The execution and delivery by the Company of this Warrant, the issuance
of the Common Stock upon exercise of the Warrant, and the fulfillment of and compliance with the
respective terms hereof and thereof by the Company, do not and shall not (i) conflict with or
result in a breach of the terms, conditions or provisions of, (ii) constitute a default under,
(iii) result in the creation of any lien, security interest, charge or encumbrance upon the
Company’s capital stock or assets pursuant to, (iv) give any third party the right to modify,
terminate or accelerate any obligation under, (v) result in a violation of, or (vi) require any
authorization, consent, approval, exemption or other action by or notice or declaration to, or
filing with, any court or administrative or governmental body or agency pursuant to, the charter or
bylaws of the Company or any subsidiary, or any law, statute, rule or regulation to which the
Company or any subsidiary is subject, or any agreement, instrument, order, judgment or decree to
which the Company or any subsidiary is subject, except for any such filings required under
applicable “blue sky” or state securities laws or required under Regulation D promulgated under the
Securities Act.

     15. Company Financial Information. Until such time as the Company shall have
satisfied all of its obligations under the Financing Arrangement, Company shall deliver to
Warrantholder such financial information as is required under the terms of the Financing
Arrangement. From and after the date that the Company shall have satisfied all of its obligations
under the Financing Arrangement, and notwithstanding any other agreement to the contrary

- 15 -

 

between the parties hereto, the Company shall deliver to the Warrantholder (so long as the
Warrantholder holds all or any portion of the Warrant or any Preferred Stock or any shares of
Common Stock issuable upon conversion of the Preferred Stock) all of the financial and other
information delivered or required to be delivered by the Company to any of its stockholders, in
their capacities as stockholders.

* * * * *

- 16 -

 

     IN WITNESS WHEREOF, the Company has caused this Warrant to be signed by its duly
authorized officer.

	 	 	 

	Issued By:

	 	Accepted By:
	 
	 	 
	ASPEN AEROGELS, INC.

	 	[IMPORT WARRANTHOLDER]
	 
	 	 
	By:
	 	 
	 
	 	 
	 

	 	 
	Donald R. Young

	 	Name:
	Chief Executive Officer

	 	Title:
	 
	 	 
	Dated:           , 2005
	 	 

- 17 -

 

Exhibit A: Exercise Form

(To be executed upon exercise of this Warrant)

	 	 	 

	To:

	 	Aspen Aerogels, Inc. (“Company”)
	 

	 	30 Forbes Road, Northborough, MA 01532
	 

	 	Attention: Chief Financial Officer

     [1. The undersigned hereby elects to purchase __________________________ shares of Common
Stock of Company pursuant to the terms of the attached Warrants, and tenders herewith payment of
the purchase price of such shares in full.]

     [1. The undersigned hereby elects to purchase __________________________ shares of Common
Stock of Company pursuant to a net exercise of the Warrant as provided in Section 2 of the
Warrant.]

2. Check here if applicable: ___ The undersigned confirms that this exercise is made in
connection with the occurrence of a public offering, sale or merger of the Company, and the
undersigned further elects to condition this exercise of the Warrant upon the consummation of said
public offering, sale or merger of the Company. This exercise shall not be deemed to be effective
until the consummation of such transaction. In the event that transaction is not consummated
within 45 days of the targeted date of the transaction, the undersigned will advise Company whether
or not this exercise should be deemed rescinded.

     2. Please issue a certificate or certificates representing said shares in the name of the
undersigned or in such other name or names as are specified below:

[name]

[address]

     3. The undersigned represents that the aforesaid shares are being acquired for the account
of the undersigned for investment and not with a view to, or for resale in connection with, the
distribution thereof and that the undersigned has no present intention of distributing such shares.

[name]

	 	 	 	 	 
	 	 	 
	 	By:  	
 	 
	 	 	(Signature) 	 
	 	Its: 	
 	 
	 

Date:exv4w4

Exhibit 4.4

THIS WARRANT AND ANY SECURITIES ACQUIRED UPON THE EXERCISE OF THIS WARRANT HAVE BEEN ACQUIRED FOR
INVESTMENT AND HAVE NOT BEEN REGISTERED UNDER APPLICABLE U.S. OR NON-U.S. SECURITIES LAWS. NEITHER
THIS WARRANT, SUCH SECURITIES NOR ANY INTEREST THEREIN MAY BE SOLD, TRANSFERRED, PLEDGED OR
HYPOTHECATED EXCEPT IN ACCORDANCE WITH THE PROVISIONS OF REGULATION S OF THE SECURITIES ACT OF
1933, AS AMENDED (THE “ACT”), UNDER THE REGISTRATION PROVISIONS OF THE ACT OR PURSUANT TO AN
EXEMPTION FROM REGISTRATION UNDER THE ACT. HEDGING TRANSACTIONS INVOLVING THIS WARRANT, SUCH
SECURITIES NOR ANY INTEREST THEREIN MAY BE CONDUCTED UNLESS IN COMPLIANCE WITH THE ACT.

THE SALE, ASSIGNMENT, HYPOTHECATION, PLEDGE, ENCUMBRANCE OR OTHER DISPOSITION AND VOTING OF ANY OF
THE SHARES OF CAPITAL STOCK OF THE COMPANY ACQUIRED PURSUANT TO THE EXERCISE OF THIS WARRANT ARE
RESTRICTED BY THE TERMS OF THE THIRD AMENDED AND RESTATED STOCKHOLDERS’ AGREEMENT, DATED AS OF JUNE
10, 2008, AS AMENDED OR AMENDED AND RESTATED FROM TIME TO TIME, AMONG THE COMPANY AND CERTAIN OF
ITS STOCKHOLDERS. THE COMPANY WILL NOT REGISTER THE TRANSFER OF SUCH SHARES OF CAPITAL STOCK ON
THE BOOKS OF THE COMPANY UNLESS AND UNTIL THE TRANSFER HAS BEEN MADE IN COMPLIANCE WITH THE TERMS
OF THE STOCKHOLDERS AGREEMENT, A COPY OF WHICH WILL BE PROVIDED AT NO COST TO THE HOLDER HEREOF
UPON WRITTEN REQUEST TO THE COMPANY.

 

ASPEN AEROGELS, INC.

CAPITAL STOCK PURCHASE WARRANT

 

          This document (this “Warrant”) dated as of June 10, 2008 certifies that, for good and
valuable consideration, Aspen Aerogels, Inc., a Delaware corporation (the “Company”), grants to
[IMPORT WARRANTHOLDER], or any successor or permitted assign of such Person (the “Warrantholder”),
the right to subscribe for and purchase from the Company, on or before the Expiration Time (as
defined below), up to [IMPORT SHARE NUMBERS] validly issued, fully paid and nonassessable shares of
Common Stock of the Company (as may be adjusted, the “Warrant Shares”) at the exercise price per
share of $0.001 (the “Exercise Price”). The Company acknowledges that the cash consideration paid
by Warrantholder for this Warrant is $10.00, that such amount has been duly received by the
Company, and that this Warrant is one of the Warrants issued in connection with that Amended and
Restated Letter Agreement dated January 19, 2007, as amended and supplemented from time to time (as
so amended and supplemented, the “Restated Letter Agreement”), entered into by and between Company
as the borrower and certain lenders named therein, and that this Warrant amends, restates [and
consolidates] all warrants previously issued to the Warrantholder in connection with the Restated
Letter Agreement. Capitalized terms used herein which are not specifically defined in other
sections of this Warrant, shall have the meanings set forth in Section 10.

 

 

     1. Warrant Term. Subject to the provisions of Section 2.4, the purchase
rights represented by this Warrant are exercisable, in whole or in part, at any time and from time
to time, from and after the Warrant grant date and on or prior to June 10, 2016 (the “Expiration
Time”).

     2. Exercise of Warrant; Payment of Taxes.

          2.1 Exercise of Warrant. The purchase rights represented by this Warrant may be
exercised by the Warrantholder, in whole or in part and from time to time, by the surrender of this
Warrant (with a duly executed notice of exercise form, the “Exercise Form”, in the form attached
hereto as Exhibit A) at the principal office of the Company and by the payment to the
Company of an amount equal to the then applicable Exercise Price per share multiplied by the number
of Warrant Shares then being purchased. If the Warrantholder is not already a party thereto, the
Warrantholder shall also execute, upon request from the Company, a joinder agreement as an Investor
to the Stockholders’ Agreement, as amended and restated, such joinder agreement to be in form and
substance mutually agreeable to both the Warrantholder and the Company. The Warrantholder shall be
deemed to have become the holder(s) of record of, and shall be treated for all purposes as the
record holder(s) of, the Warrant Shares represented thereby (and such Warrant Shares shall be
deemed to have been issued) immediately prior to the close of business on the date or dates upon
which this Warrant is exercised.

          2.2 Warrant Shares Certificate. A stock certificate for the Warrant Shares specified
in the Exercise Form shall be delivered to the Warrantholder within five (5) Business Days after
receipt of the Exercise Form by the Company and payment by the Warrantholder of the aggregate
Exercise Price, along with a check from the Company in lieu of any fractional shares that the
Warrantholder would be entitled to purchase under this Warrant. If this Warrant is exercised in
part, the Company shall, at the time of delivery of the stock certificate, deliver to the
Warrantholder a new Warrant evidencing the right to purchase the remaining Warrant Shares, which
new Warrant shall in all other respects be identical to this Warrant.

          2.3 Payment of Taxes. The Company shall pay all expenses, taxes and other
governmental charges with respect to the issuance or delivery of the Warrant Shares, unless such
expense, tax or charge is imposed by law upon the Warrantholder.

          2.4 Exercise or Termination upon Corporate Event. If the aggregate Exercise Price, as
of the consummation date of any Corporate Event, is equal to or greater than the aggregate value of
the securities, cash and other property that would have been received in connection with a
Corporate Event by a holder of the number of shares of Common Stock for which this Warrant was
exercisable immediately prior to such Corporate Event (the “Exercise Proceeds”), then this Warrant
shall automatically terminate upon the consummation of such Corporate Event. If the aggregate
Exercise Price, as of such consummation date, is less than the aggregate value of the Exercise
Proceeds, then the Warrantholder shall be entitled to exercise this Warrant in connection with such
Corporate Event and shall automatically receive upon the consummation of such Corporate Event, in
lieu of the Warrant Shares, the Exercise Proceeds, and this Warrant shall automatically terminate
in connection therewith.

- 2 -

 

     3. Restrictions on Transfer; Restrictive Legends.

          3.1 Restrictions on Transfer. This Warrant and the Warrant Shares issuable upon
exercise of all or part of this Warrant are unregistered securities that are subject to the
restrictions on transfer imposed by the Securities Act and applicable state securities laws and may
not be offered, sold, transferred, pledged or otherwise disposed of, in whole or in part, to any
Person other than in accordance with the Securities Act and applicable state securities laws. The
Warrant Shares issuable upon exercise of all or part of this Warrant are also subject to additional
restrictions on transfer set forth in the Stockholders’ Agreement and may not be offered, sold,
transferred, pledged or otherwise disposed of, in whole or in part, to any Person other than in
accordance with the Stockholders’
Agreement. As a condition to the exercise of this Warrant and the purchase of the Warrant
Shares, the Warrantholder will become a party to the Stockholders’ Agreement pursuant to the form
Joinder attached thereto.

          3.2 Restrictive Legends. Until such time as the restrictions on transfer imposed on
this Warrant by the Securities Act and applicable state securities laws shall no longer be
effective, this Warrant, any Warrant issued to the Warrantholder upon the partial exercise of this
Warrant pursuant to Section 2 shall be stamped or otherwise imprinted with a legend in
substantially the form as set forth on the cover of this Warrant. Until such time as the
restrictions on transfer imposed on the Warrant Shares by the Securities Act, applicable state
securities laws and the Stockholders’ Agreement shall no longer be effective, each stock
certificate for Warrant Shares and each stock certificate issued upon the direct or indirect
transfer of any such Warrant Shares shall be stamped or otherwise imprinted with a legend in
substantially the form provided in the Stockholders’ Agreement. Upon the termination of such
restrictions on transfer, the Warrantholder may require the Company to issue a Warrant or a stock
certificate for Warrant Shares, in each case without a legend, if and to the extent permitted by,
and in accordance with, the Stockholders’ Agreement and applicable law.

          3.3 Lock-Up. The Warrantholder agrees not to effect any sale or distribution of
Warrant Shares during the seven (7) days prior to and the one hundred eighty (180) days after any
Public Offering or such longer period as may be prescribed at such time. For purposes of this
Warrant, “Public Offering” shall mean an underwritten public offering pursuant to an effective
registration statement under the Securities Act of 1933, as amended, covering the offering and sale
by the Company of Common Stock.

     4. Reservation and Registration of Warrant Shares. The Company covenants and agrees
as follows:

          4.1 Validly Issued and Free of Encumbrances. All Warrant Shares issued upon the
exercise of all or any part of this Warrant shall, upon issuance and payment of the Exercise Price
therefore (or upon net exercise as permitted herein), be validly issued, fully paid and
nonassessable, issued in compliance with all applicable federal and state securities laws, and free
from all taxes, liens and charges with respect to the issue thereof, and not subject to any
preemptive rights.

          4.2 Sufficient Authorized Shares. During the period within which the rights
represented by this Warrant may be exercised, the Company shall at all times have authorized and
reserved, for the purpose of issuance of Common Stock upon any exercise of the purchase rights
evidenced by this Warrant, and shall keep available free from preemptive rights, a

- 3 -

 

sufficient
number of shares of its Common Stock to provide for the exercise of the rights represented by this
Warrant.

          4.3 Noncontravention. The Company shall not, by amendment of its Charter or through
any reorganization, transfer of assets, spin-off, consolidation, merger, dissolution, issue or sale
of securities or any other action or inaction, avoid or seek to avoid the observance or performance
of any of the terms of this Warrant to be observed or performed hereunder, and shall at all times
in good faith assist in performing, carrying out, and giving effect to the terms hereof and in the
taking of all such actions as may be necessary or appropriate in order to protect the rights of the
Warrantholder against dilution or other impairment.

     5. Anti-Dilution Adjustments. From and after the date hereof and until the Expiration
Date, notwithstanding the fact that no Warrant Shares shall be issued and outstanding, the Exercise
Price, and the number and type of Warrant Shares or other securities to be received upon exercise
of this Warrant, shall be subject to adjustment as follows:

          5.1 Stock Dividends and Combinations.

          (a) If, at any time after the date hereof, the number of shares of Common Stock outstanding is
increased by a stock dividend payable in shares of Common Stock or by a subdivision or split-up of
shares of Common Stock, then, following the record date for the determination of holders of Common
Stock entitled to receive such stock dividend, subdivision or split-up, the Exercise Price shall be
decreased and the number of shares of Common Stock issuable on exercise of this Warrant shall be
increased in proportion to such increase in outstanding shares.

          (b) If, at any time after the date hereof, the number of shares of Common Stock outstanding is
decreased by a combination of the outstanding shares of Common Stock, then, following the record
date for such combination, the Exercise Price shall be increased and the number of shares of Common
Stock issuable on exercise of this Warrant shall be decreased in proportion to such decrease in
outstanding shares.

          5.2 Recapitalization, Etc. In the event of any capital reorganization of the Company,
any reclassification of the stock of the Company (other than a change in par value or from par
value to no par value or from no par value to par value or as a result of a stock dividend or
subdivision, split-up or combination of shares), or any consolidation or merger of the Company,
this Warrant shall after such reorganization, reclassification, consolidation or merger be
exercisable for the kind and number of shares of stock or other securities or property of the
Company or of the company resulting from such consolidation or surviving such merger to which the
holder of the number of shares of Common Stock deliverable (immediately prior to the time of such
reorganization, reclassification, consolidation or merger) upon exercise of this Warrant would have
been entitled upon such reorganization, reclassification, consolidation or merger. The provisions
of this clause shall similarly apply to successive reorganizations, reclassifications,
consolidations and mergers.

          5.3 Waiver. In the event that holders of at least sixty-six and two thirds percent
(662⁄3%) of the Warrants, as the case may be, consent in writing to limit, or waive in its entirety,
any antidilution adjustment to which the Warrantholders would otherwise be entitled

- 4 -

 

hereunder, the
Company shall not be required to make any adjustment whatsoever in excess of such limit or at all,
as the terms of such consent may dictate.

          5.4 Computations. The computations of all amounts under this Section 5 shall
be made assuming all other antidilution or similar adjustments to be made to the terms of all other
securities resulting from the transaction causing an adjustment pursuant to this Section 5
have previously been made so as to maintain the relative economic interest of the Warrants
vis à vis all other securities issued by the Company.

          5.5 Par Value. The Company shall take or cause to be taken such steps as shall be
necessary to ensure that the par value per share of Common Stock is at all times less than or equal
to the Exercise Price.

     6. Transfer and Exchange. If this Warrant is presented to the Company with a request
to register a transfer or to exchange it for an equal number of Warrants of other denominations the
Company will do so.

     7. Loss or Destruction of Warrant. Subject to the terms and conditions hereof, upon
receipt by the Company of evidence reasonably satisfactory to it of the loss, theft, destruction or
mutilation of this Warrant and, in the case of loss, theft or destruction, of such bond or
indemnification as the Company may reasonably require, and, in the case of such mutilation, upon
surrender and
cancellation of this Warrant, the Company will execute and deliver to the Warrantholder a new
Warrant of like tenor.

     8. Ownership of Warrant. The Company may deem and treat the Person in whose name this
Warrant is registered as the Warrantholder and owner hereof (notwithstanding any notations of
ownership or writing hereon made by anyone other than the Company) for all purposes and shall not
be affected by any notice to the contrary, until presentation of this Warrant for registration of
transfer.

     9. Amendments. Any provision of this Warrant may be amended and the observance
thereof waived only with the written consent of the Company and the Warrantholder.

     10. Definitions. As used herein, unless the context otherwise requires, the following
terms have the following respective meanings:

          “Affiliate” means, whether or not capitalized, (1) with respect to any Person, any of
(a) a director, officer or stockholder holding five percent (5%) or more of the capital stock (on a
fully diluted basis) of such Person, (b) a spouse, parent, sibling or descendant of such Person (or
a spouse, parent, sibling or descendant of any director or officer of such Person) and (c) any
other Person that, directly or indirectly through one or more intermediaries, controls, or is
controlled by, or is under common control with, another Person or (2) in any event, any Person
meeting the definition of “Affiliate” set forth in Rule 405 under the Securities Act. The term
“control” includes, without limitation, the possession, directly or indirectly, of the power to
direct the management and policies of a Person, whether through the ownership of voting securities,
by contract or otherwise.

          “Business Day” means any day other than a Saturday, Sunday or a day on which national
banks are authorized by law to close in the Commonwealth of Massachusetts.

- 5 -

 

          “Charter” means the Amended and Restated Certificate of Incorporation of the Company,
as amended from time to time.

          “Common Stock” means the Company’s presently authorized Common Stock, par value $.001
per share, and any stock into or for which such Common Stock may hereafter be converted or
exchanged pursuant to the Charter of the Company as amended from time to time as provided by law
and in such Charter.

          “Corporate Event” means: (i) the sale, transfer, lease, license or other conveyance or
disposition of all or substantially all of the Company’s assets; (ii) the Liquidation of the
Company; or (iii) the sale, transfer or other disposition of all or substantially all of the
Company’s capital stock to a Person or group of Persons that is not an Affiliate of the Company,
but does not include any one transaction or series of related transactions the sole purpose and
effect of which is to change the state or type of organization of the Company (e.g., to change the
Company from a Delaware corporation to a New York corporation or from a corporation to a limited
liability company).

          “Liquidation” has the meaning defined in the Charter.

          “Person” shall be construed broadly and shall include an individual, a partnership, a
corporation, a limited liability company, an association, a joint stock company, a trust, a joint
venture, an unincorporated organization, or a governmental entity (or any department, agency, or
political subdivision thereof).

          “Securities Act” means the Securities Act of 1933, as amended, and the rules and
regulations of the United States Securities and Exchange Commission thereunder.

          “Stockholders’ Agreement” means the Third Amended and Restated Stockholders’
Agreement, dated as of the date hereof, as amended, among the Company and certain stockholders of
the Company, as the same may be amended, modified or restated from time to time.

     11. Miscellaneous Provisions.

          11.1 Entire Agreement. This Warrant and the Stockholders’ Agreement constitute the
entire agreement between the Company and the Warrantholder with respect to this Warrant.

          11.2 Binding Effect; Benefits. This Warrant shall inure to the benefit of and shall
be binding upon the Company and the Warrantholder and their respective permitted successors and
assigns. Nothing in this Warrant, expressed or implied, is intended to or shall confer on any
Person other than the Company and the Warrantholder, or their respective permitted successors or
assigns, any rights, remedies, obligations or liabilities under or by reason of this Warrant.

- 6 -

 

          11.3 Section and Other Headings. The section and other headings contained in this
Warrant are for reference purposes only and shall not be deemed to be a part of this Warrant or to
affect the meaning or interpretation of this Warrant.

          11.4 Notices. All notices, demands and other communications provided for or permitted
hereunder shall be made in writing and shall be by registered or certified first-class mail, return
receipt requested, telecopier, courier service, overnight mail or personal delivery:

If to the Company:

Aspen Aerogels, Inc.

30 Forbes Road, Building B

Northborough, MA 01532

Telephone:    (508) 691-1111

Facsimile:    (508) 691-1200

Attention:    Chief Executive Officer

with a copy (which shall not constitute notice) to:

Edwards Angell Palmer & Dodge LLP

111 Huntington Avenue

Boston, MA 02199

Telephone:    (617) 951-2207

Facsimile:    (888) 325-9513

Attention:    Christopher W. Nelson, Esq.

If to the Warrantholder:

to the addressees reflected on the Warrant

register maintained by the Company

          All such notices and other communications shall be deemed to have been given and received (i)
in the case of personal delivery, on the date of such delivery, (ii) in the case of delivery by
telecopy, on the date of such delivery, (iii) in the case of delivery by nationally recognized
overnight
courier, on the next business day following dispatch and (iv) in the case of mailing, on the third
business day following such mailing.

          11.5 Issuance Tax. The issuance of certificates for shares of Common Stock upon
exercise of this Warrant shall be made without charge to the Warrantholder hereof for any issuance
tax in respect hereof, provided that the Company shall not be required to pay any
tax which may be payable in respect of any transfer involved in the issuance and delivery of any
certificate in a name other than that of the Warrantholder.

          11.6 Severability. Any term or provision of this Warrant which is invalid or
unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of
such invalidity or unenforceability without rendering invalid or unenforceable the terms and
provisions of this Warrant or affecting the validity or enforceability of any of the terms or
provisions of this Warrant in any other jurisdiction.

- 7 -

 

          11.7 Governing Law. All issues concerning this Warrant shall be governed by and
construed in accordance with the law of the State of Delaware, without regard to the conflicts of
law principles thereof.

          11.8 Rights as Shareholders. The Warrantholder shall not be entitled to vote or
receive dividends or be deemed the holder of Common Stock or otherwise be entitled to any voting or
other rights as a shareholder of the Company, until this Warrant shall have been exercised and the
Warrant Shares purchasable upon the exercise shall have become deliverable, as provided herein.

          11.9 Counterparts. This Warrant may be executed in counterparts, each of which, when
executed and delivered, shall be an original, but all counterparts shall be of and constitute one
instrument.

     12. Disposition of Warrant or Shares of Common Stock. With respect to any offer, sale
or other transfer or disposition of this Warrant or any Warrant Shares acquired pursuant to the
exercise of this Warrant prior to registration of such shares, the Warrantholder hereof and each
subsequent holder of this Warrant agrees to give written notice to the Company prior thereto,
describing briefly the manner thereof, together with a written opinion of such holder’s counsel (if
reasonably requested by the Company and reasonably satisfactory to the Company) to the effect that
(i) such offer, sale or other transfer or disposition may be effected without registration or
qualification of this Warrant or such shares of Common Stock under the Securities Act as then in
effect, and (ii) indicating whether or not under the Securities Act this Warrant or the
certificates representing such shares of Common Stock to be sold or otherwise transferred or
disposed of require any restrictive legend thereon in order to ensure compliance with the
Securities Act; provided, however, that a written opinion of holder’s counsel shall
not be required in connection with any sale pursuant to Rule 144. This Warrant or the
certificates representing the shares of Common Stock thus transferred (except a transfer pursuant
to Rule 144) shall bear a legend as to the applicable restrictions on transferability in order to
insure compliance with the Securities Act, unless in the aforesaid opinion of counsel for the
holder, such legend is not required in order to insure compliance with the Securities Act. Upon
any valid transfer of this Warrant or portion thereof, Company agrees to reissue the Warrant (or
Warrants in the case of a partial transfer) and/or the Warrant Shares receivable upon the exercise
hereof, and if the legend is not required, such re-issuance shall be without said legend. Nothing
herein shall restrict the transfer of this Warrant (or any portion hereof) or the certificates
representing the Warrant Shares acquired pursuant to the exercise of this Warrant by the initial
Warrantholder hereof or any successor holder to (i) any affiliate of such holder, including without
limitation any partnership affiliated with such holder, any partner of any such partnership or any
successor corporation to the holder hereof as a result of a merger or consolidation with or a sale
of all or substantially all of the stock or assets of the holder, (ii) any Person
in a public offering pursuant to an effective registration statement under the Securities Act,
or (iii) to any other Person to the extent that the transfer to such Person is exempt from the
registration requirements of the Securities Act and such Person agrees in writing to be bound by
all of the restrictions on transfer contained herein, provided, however, that no
such transfer may be made to any direct competitor of the Company, which shall mean a Person
engaged in the research, manufacture or sale of aerogels, aerogel based products or insulation
products. Any transfer described above must be made in compliance with all applicable federal and
state

- 8 -

 

securities laws. The Company may issue stop transfer instructions to its transfer agent in
connection with the foregoing restrictions.

     13. Warrantholder’s Representations. The Warrantholder acknowledges that it has had
access to all material information concerning the Company which it has requested. The
Warrantholder also acknowledges that it has had the opportunity to, and has to its satisfaction,
questioned the officers of the Company with respect to its investment hereunder. The Warrantholder
represents that it understands that the Warrant and the Common Stock are speculative investments,
that it is aware of the Company’s business affairs and financial condition and that it has acquired
sufficient information about the Company to reach an informed and knowledgeable decision to acquire
the Warrant. The Warrantholder is purchasing the Warrant and any Common Stock issued upon exercise
thereof for investment for its own account only and not with a view to, or for resale in connection
with, any “distribution” thereof in violation of the Securities Act or applicable state securities
laws. The Warrantholder further represents that it understands that the Warrant and Common Stock
have not been registered under the Securities Act or applicable state securities laws by reason of
specific exemptions therefrom, which exemptions depend upon, among other things, the bona fide
nature of the Warrantholder’s investment intent as expressed herein. The Warrantholder is an
“accredited investor” as defined in Regulation D promulgated under the Securities Act.

[Remainder of page intentionally left blank]

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     IN WITNESS WHEREOF, the Company has caused this Warrant to be signed by its duly authorized
officer.

	 	 	 	 	 	 	 	 	 	 	 

	Issued By:	 	 	 	Accepted By:	 	 
	 
	 	 	 	 	 	 	 	 	 	 
	ASPEN AEROGELS, INC.	 	 	 	[IMPORT WARRANTHOLDER NAME]	 	 
	 
	 	 	 	 	 	 	 	 	 	 
	By:

	 	 	 	 	 	By:	 	 	 	 
	 

	 	 
	 	 	 	 	 	 	 	 
	 

	 	Donald R. Young
	 	 	 	Name:	 	 	 	 
	 

	 	Chief Executive Officer
	 	 	 	Title:	 	 	 	 

Aspen Aerogels, Inc. Capital Stock Purchase Warrant

 

 

Exhibit A: Exercise Form

(To be executed upon exercise of this Warrant)

	 	 	 

	To:

	 	Aspen Aerogels, Inc. (“Company”)
	 

	 	30 Forbes Road, Northborough, MA 01532
	 

	 	Attention: Chief Financial Officer

     1. The undersigned hereby elects to purchase __________________________ shares of Common
Stock of Company pursuant to the terms of the attached Warrants, and tenders herewith payment of
the purchase price of such shares in full.

     2. Please issue a certificate or certificates representing said shares in the name of the
undersigned or in such other name or names as are specified below:

[name]

[address]

     3. The undersigned represents that the aforesaid shares are being acquired for the account
of the undersigned for investment and not with a view to, or for resale in connection with, the
distribution thereof and that the undersigned has no present intention of distributing such shares.

[name]

	 	 	 	 	 
	 	 	 
	 	By:  	
 	 
	 	 	(Signature) 	 
	 	Its: 	
 	 
	 

Date:                                        

Aspen Aerogels, Inc. Capital Stock Purchase Warrant

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