Document:

Form of Officer RSU Award Agreement

 Exhibit 10.27 
 DELPHI AUTOMOTIVE PLC 
 LONG TERM INCENTIVE PLAN 

Officer RSU Award Agreement 
 (including Continuity Incentive RSU Award) 
 You have been granted a
Restricted Stock Unit (“RSU”) award (this “Award”) on the following terms and subject to the provisions of Attachments A and B and the Delphi Automotive PLC Long Term Incentive Plan (the “Plan”).
Unless defined in this Award agreement (including Attachments A and B, this “Agreement”), capitalized terms will have the meanings assigned to them in the Plan. In the event of a conflict among the provisions of the Plan, this
Agreement and any descriptive materials provided to you, the provisions of the Plan will prevail. Receipt of any Award under this Agreement is conditioned on execution of the Confidentiality and Noninterference Agreement included as Attachment C.

  

			
	 Participant
	  	[Full name]
		
	 Number of Shares Underlying Award
	  	 [—] Shares (the “Target RSU Shares”), which are comprised
of:
  
 (i) [—] Target RSU
Shares that vest based on time (the “Time-Based RSU Shares”)
  
 (ii) [—] Target RSU Shares that vest based on performance (the “Performance-Based RSU Shares”)

 
 (iv) [—] Target Continuity
Incentive RSU Shares that vest based on time (the “Continuity Incentive RSU Shares”)

		
	 Grant Date
	  	[—], 2012
	
	 Vesting Schedule
 (subject to Sections 3 and 4 of Attachment A)

		
	Time-Based RSU Shares	  	Performance-Based RSU Shares
		
	 One-third of the Time-Based RSU Shares will first vest on each of the first three anniversaries of the Grant Date (each, a
“Time-Based Vesting Date”), as follows:
  
 [—],
2013                                         [—]
  
 [—],
2014                                         [—]
  
 [—],
2015                                         [—]
	  	 The “Performance Period” will be from January 1, 2012 to December 31, 2014.

 
 On the last day of the Performance Period (the “Performance-Based Vesting
Date”), 0% to 200% of the Performance-Based RSU Shares will vest (any vested Performance-Based RSU Shares, the “Earned Performance- 

			
		  	Based RSU Shares”) based on the performance of certain metrics during the Performance Period in accordance with the formula set forth on Attachment
B.

 Continuity Incentive RSU Shares 

The Continuity Incentive RSU Shares will 
 vest in full on [—], 2015, the final Time- 
 Based Vesting Date. 

  
 2 

 IN WITNESS WHEREOF, the parties have executed this Agreement as of the day and year first
written above. 
  

			
	 DELPHI AUTOMOTIVE PLC

		
	 By:
	 	
		 	  

		 	Name:
		 	Title:

  

			
	 PARTICIPANT

 

		 	  

		 	Name:

  
 3 

 Attachment A 
 RSU Award Agreement 
 Terms and Conditions 

Section 1. Grant of Award. Subject to the terms and conditions of the Plan and this Agreement, the Company hereby grants this
Award to the Participant on the Grant Date on the terms set forth on the cover page of this Agreement, as more fully described in this Attachment A. This Award is granted under the Plan, which is incorporated herein by this reference and made a part
of this Agreement. 
 Section 2. Vesting. 
 (a) Time-Based RSU Shares. Subject to Sections 3 and 4, one-third of the Time-Based RSU Shares shall vest on each of the Time-Based Vesting Dates. 

(b) Performance-Based RSU Shares. Subject to Sections 3 and 4, the Performance-Based RSU Shares shall vest on the Performance-Based
Vesting Date, and the number of Earned Performance-Based RSU Shares shall be determined based on the performance of certain metrics during the Performance Period (as determined by the Committee) in accordance with the formula set forth on Attachment
B. 
 (c) Continuity Incentive RSU Shares. Subject to Sections 3 and 4, the Continuity Incentive RSU Shares shall vest in
full on the final Time-Based Vesting Date. 
 Section 3. Termination of Service. Subject to Section 4:

 (a) Time-Based RSU Shares. 
 (i) Death; Disability; Termination Without Cause; Termination for Good Reason. If the Participant experiences a Termination of Service after the first Time-Based Vesting date and prior to the final
Time-Based Vesting Date (A) due to the Participant’s death, (B) due to the Participant’s Disability, (C) by the Company without Cause or (D) by the Participant for Good Reason (each such circumstance being a
“Qualifying Termination”), a pro rata portion of the unvested Time-Based RSU Shares shall vest on the first Time-Based Vesting Date following such termination. Such pro rata portion shall equal (A) the number of unvested Time-Based
RSU Shares as of such termination, multiplied by (B) a fraction, the numerator of which shall be the number of full months between the Time-Based Vesting Date that immediately precedes such termination and the termination date and the
denominator of 

  
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which shall be the number of full months between the Time-Based Vesting Date that immediately precedes such termination and the final Time-Based Vesting Date. Any Time-Based RSU Shares that do
not vest on the first Time-Based Vesting Date following such termination shall be forfeited without any payment to the Participant. 
 (ii) Any Other Termination of Service. In the event of the Participant’s Termination of Service (A) prior to the first Time-Based Vesting Date for any reason, or (B) after the first
Time-Based Vesting Date but prior to the final Time-Based Vesting Date for any reason other than a Qualifying Termination, any unvested Time-Based RSU Shares shall be forfeited without any payment to the Participant. 

(b) Performance-Based RSU Shares. 
 (i) Death; Disability; Termination Without Cause; Termination for Good Reason; Retirement. If the Participant experiences a Termination of Service after the first anniversary of the Grant Date and
prior to the Performance-Based Vesting Date due to a Qualifying Termination or due to the Participant’s voluntary termination following attainment of age 55 with at least ten years of service with the Company or its predecessors, the number of
Earned Performance-Based RSU Shares shall equal (A) the number of Earned Performance-Based RSU Shares determined in accordance with Section 2(b) above, multiplied by (B) a fraction, the numerator of which shall be the number of
full months between the Grant Date and the termination date and the denominator of which shall be the number of full months between the Grant Date and the Performance-Based Vesting Date. 

(ii) Any Other Termination of Service. In the event of the Participant’s Termination of Service (A) prior
to the first anniversary of the Grant Date for any reason, or (B) after the first anniversary of the Grant Date but prior to the Performance-Based Vesting Date for any reason other than as described in clause (b)(i) above, the Participant shall
forfeit the Performance-Based RSU Shares in full without any payment to the Participant. 
 (c) Continuity Incentive RSU Shares.

 (i) Death; Disability; Termination Without Cause; Termination for Good Reason. If the Participant
experiences a Termination of Service due to a Qualifying Termination after the first anniversary of the Grant Date but prior to the final Time-Based Vesting Date, a pro rata portion of the Continuity Incentive RSU Shares shall vest on the final
Time-Based Vesting Date following such termination. Such pro rata portion shall equal (A) the number of RSU Shares, multiplied by  

  
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(B) a fraction, the numerator of which shall be the number of full months between the Grant Date and the termination date and the denominator of which shall be the number of full months between
the Grant Date and the final Time-Based Vesting Date. 
 (ii) Any Other Termination of Service. In the
event of the Participant’s Termination of Service (A) prior to the first anniversary of the Grant Date for any reason, or (B) after the first anniversary of the Grant Date but prior to the final Time-Based Vesting Date for any reason
other than as described in clause (c)(i) above, the Continuity Incentive RSU Shares shall be forfeited without any payment to the Participant. 
 Section 4. Change in Control. 
 (a) Conditional Vesting. Upon a
Change in Control prior to the final Time-Based Vesting Date or the Performance-Based Vesting Date, except to the extent that another Award meeting the requirements of Section 4(b) (a “Replacement Award”) is provided to the
Participant to replace this Award (the “Replaced Award”): 
 (i) Any unvested Time-Based RSU
Shares and unvested Continuity Incentive RSU Shares shall vest in full and be delivered to the Participant on the effective date of such Change in Control; and 
 (ii) A number of Earned Performance-Based RSU Shares equal to the greater of (A) the number of Earned Performance-Based RSU Shares that would vest if the effective date of the Change in Control were
deemed to be the Performance-Based Vesting Date, or (B) 100% of the Performance-Based RSU Shares granted, shall vest and be delivered to the Participant on the effective date of such Change in Control. For purposes of clause (a)(ii)(A), the
determination of performance shall be made by the Committee, as constituted immediately before the Change in Control, in its sole discretion. 
 (b) Replacement Awards. An Award shall meet the conditions of this Section 4(b) (and thereby qualify as a Replacement Award) if the following conditions are met: 

(i) The Award has a value at least equal to the value of the Replaced Award; 

(ii) The Award relates to publicly-traded equity securities of the Company or its successor following the Change in
Control or another entity that is affiliated with the Company or its successor following the Change in Control; and 

  
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 (iii) The other terms and conditions of the Award are not less favorable to
the Participant than the terms and conditions of the Replaced Award (including the provisions that would apply in the event of a subsequent Change in Control and the provisions of Section 4(c)). 

Without limiting the generality of the foregoing, a Replacement Award may take the form of a continuation of a Replaced Award if the requirements of the
preceding sentence are satisfied. The determination of whether the conditions of this Section 4(b) are satisfied shall be made by the Committee, as constituted immediately before the Change in Control, in its sole discretion. 

(c) Qualifying Termination following a Change in Control. If the Participant experiences a Qualifying Termination (for purposes of
which the Company will include a successor of the Company following the Change in Control or another entity that is affiliated with the Company or its successor following the Change in Control), in connection with or during a period of 2 years after
the Change in Control, any Replacement Award that replaces this Award, to the extent not vested as of such Termination of Service, shall vest in full and all previously undelivered Time-Based RSU Shares, Continuity Incentive RSU Shares and
Performance-Based RSU Shares shall be delivered to the Participant (or the Participant’s beneficiary) as soon as practicable and within 30 days following the date of such Qualifying Termination. The total number of Performance-Based RSU Shares
delivered to the Participant pursuant to this Section 4(c) shall equal (i) the greater of (A) the number of Earned Performance-Based RSU Shares that would vest if the effective date of the Change in Control were deemed to be the
Performance-Based Vesting Date, or (B) 100% of the Performance-Based RSU Shares granted under this Award, minus (ii) the number of Performance-Based RSU Shares, if any, that were previously delivered to the Participant. For purposes of
clause (c)(i)(A), the determination of performance shall be the same determination made by the Committee, as constituted immediately before the Change in Control, for purposes of vesting of RSU awards held by non-officer executives of the Company
whose awards (A) were granted in respect of the same Performance Period as defined in this Agreement, (B) were determined using the same performance metrics described in Attachment B to this Agreement and (C) vested on the effective
date of such Change in Control. 
 Section 5. Delivery of Shares. Subject to Section 4: 

(a) Time-Based RSU Shares. As soon as practicable and within 30 days following each Time-Based Vesting Date, the Company shall
deliver to the Participant the portion of the Time-Based RSU Shares that vests on such Time-Based Vesting Date. 
 (b)
Performance-Based RSU Shares. The Company shall deliver any Earned Performance-Based RSU Shares to the Participant as soon as practicable following the Performance-Based Vesting Date but in no event later than March 15, 2015. 

  
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 (c) Continuity Incentive RSU Shares. As soon as practicable and within 30 days
following the final Time-Based Vesting Date, the Company shall deliver to the Participant the vested Continuity Incentive RSU Shares. 
 Section 6. Dividend Equivalents. If a dividend is paid on Shares during the period commencing on the Grant Date and ending on the date on which the vested Time-Based RSU Shares, the vested
Continuity Incentive RSU Shares or the Earned Performance-Based RSU Shares (together, the “Earned RSU Shares”) are delivered to the Participant, the Participant shall be eligible to receive an amount equal to the amount of the
dividend that the Participant would have received had the Earned RSU Shares been delivered to the Participant as of the time at which such dividend is paid, which amount shall be calculated and reinvested in Shares as of the time at which such
dividend is paid. No such amount shall be payable with respect to any portion of the Award that is forfeited pursuant to Section 3. Such amount shall be paid to the Participant on the date on which the Earned RSU Shares are delivered to the
Participant and shall be paid in Shares; provided that the Committee retains the discretion to pay such amount in cash rather than Shares in the event that an insufficient number of Shares are authorized and available for issuance under the
Plan. Any Shares that the Participant is eligible to receive pursuant to this Section 6 are referred to herein as “Dividend Shares.” 
 Section 7. Additional Terms and Conditions. 
 (a) Issuance of
Shares. Upon delivery of the Earned RSU Shares and, if applicable, any Dividend Shares, such Shares shall be evidenced by book-entry registration; provided, however, that the Committee may determine that such Shares shall be evidenced in
such other manner as it deems appropriate, including the issuance of a share certificate or certificates. Any such fractional Shares shall be rounded using conventional rounding methods. 

(b) Voting Rights. The Participant shall not have voting rights with respect to the Target RSU Shares, the Earned RSU Shares or, if
applicable, any Dividend Shares unless and until such Shares are delivered to the Participant. 
 Section 8.
Miscellaneous Provisions. 
 (a) Notices. All notices, requests and other communications under this Agreement shall
be in writing and shall be delivered in person (by courier or otherwise), mailed by certified or registered mail, return receipt requested, or sent by facsimile transmission, as follows: 

  
 A-5

 if to the Company, to: 

Delphi Automotive PLC 
 c/o Delphi Automotive Systems, LLC 
 5725 Delphi Drive 

Troy, MI 48098 

Attention: David M. Sherbin 
 Facsimile: (248) 813-2491 
 if to the Participant, to the address that the
Participant most recently provided to the Company, 
 or to such other address or facsimile number as such party may hereafter specify for the
purpose by notice to the other parties hereto. All such notices, requests and other communications shall be deemed received on the date of receipt by the recipient thereof if received prior to 5:00 p.m. on a business day in the place of receipt.
Otherwise, any such notice, request or communication shall be deemed received on the next succeeding business day in the place of receipt. 
 (b) Entire Agreement. This Agreement, the Plan and any other agreements referred to herein and therein and any attachments referred to herein or therein, constitute the entire agreement and
understanding between the parties in respect of the subject matter hereof and supersede all prior and contemporaneous arrangements, agreements and understandings, both oral and written, whether in term sheets, presentations or otherwise, between the
parties with respect to the subject matter hereof. 
 (c) Amendment; Waiver. No amendment or modification of any provision
of this Agreement shall be effective unless signed in writing by or on behalf of the Company and the Participant, except that the Committee may amend or modify this Agreement without the Participant’s consent in accordance with the provisions
of the Plan or as otherwise set forth in this Agreement. No waiver of any breach or condition of this Agreement shall be deemed to be a waiver of any other or subsequent breach or condition whether of like or different nature. Any amendment or
modification of or to any provision of this Agreement, or any waiver of any provision of this Agreement, shall be effective only in the specific instance and for the specific purpose for which made or given. 

(d) Assignment. Neither this Agreement nor any right, remedy, obligation or liability arising hereunder or by reason hereof shall
be assignable by the Participant. 
 (e) Successors and Assigns; No Third Party Beneficiaries. This Agreement shall inure
to the benefit of and be binding upon the Company and the Participant and their respective heirs, successors, legal representatives and permitted assigns. Nothing in this Agreement, expressed or implied, is intended to confer on anyone other than
the Company and the Participant, and their respective heirs, successors, legal representatives and permitted assigns, any rights, remedies, obligations or liabilities under or by reason of this Agreement. 

  
 A-6

 (f) Counterparts. This Agreement may be signed in any number of counterparts, each of
which shall be an original, with the same effect as if the signatures thereto and hereto were upon the same instrument. 
 (g)
Participant Undertaking. By accepting this Award, the Participant agrees to execute the Confidentiality and Noninterference Agreement included as Attachment C and to take whatever additional action and execute whatever additional documents
the Company may deem necessary or advisable to carry out or give effect to any of the obligations or restrictions imposed on the Participant pursuant to the provisions of this Agreement. 

(h) Plan. The Participant acknowledges and understands that material definitions and provisions concerning this Award and the
Participant’s rights and obligations with respect thereto are set forth in the Plan. The Participant has read carefully, and understands, the provisions of the Plan. 
 (i) Risk Statement. The Participant acknowledges and accepts that the future value of the Shares is unknown and cannot be predicted with certainty and that the value of the Award at the time when
the Earned RSU Shares are delivered may be less than the value of the Award on the Grant Date. The Participant understands that if he or she is in any doubt as to whether he or she should accept this Award, the Participant should obtain independent
advice. 
 (j) Governing Law. The Agreement shall be governed by the laws of the State of New York, without application of
the conflicts of law principles thereof. 
 (k) No Right to Continued Service. The granting of the Award evidenced hereby
and this Agreement shall impose no obligation on the Company or any Affiliate to continue the service of the Participant and shall not lessen or affect the right that the Company or any Affiliate may have to terminate the service of such
Participant. 
 (l) WAIVER OF JURY TRIAL. EACH OF THE PARTIES HERETO IRREVOCABLY WAIVES ANY AND ALL RIGHT TO TRIAL BY JURY
IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATED TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY. 

  
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 Attachment B 

 
 Performance Metrics and Formula Used to Determine 

the Number of Earned Performance-Based RSU Shares 
 Metric 1: Return on Net Assets (“RONA”) 
  

	•	 	 Definition: Tax-affected operating income, divided by average net working capital plus average net property, plant and equipment expense, measured each
calendar year. Final performance will be based upon the three-year average of calendar year performance for 2012, 2013 and 2014. 

  

	•	 	 Weight: 50% of Performance-Based RSU Shares granted 

  

	•	 	 Number of Performance-Based RSU Shares related to the RONA metric (“RONA RSU Shares”):
[—] 

  

	•	 	 RONA Performance Parameters: 

  

																
	 	  	2012 – 2014
RONA	 	% of Target RONA
RSU Shares Earned
(Payout %)	 	Number of Earned
RONA RSU Shares at
Payout % Level
	 Threshold
	  	 	 	[	—] %	 	 	 	50	%	 	 	 	[	—]
	 Target
	  	 	 	[	—] %	 	 	 	100	%	 	 	 	[	—]
	 “Bend Point”
	  	 	 	[	—] %	 	 	 	150	%	 	 	 	[	—]
	 Maximum
	  	 	 	[	—] %	 	 	 	200	%	 	 	 	[	—]

  

	 	•	 	 If the final RONA is below the threshold RONA, no RONA RSU Shares will be earned 

 

	 	•	 	 If the final RONA is above the maximum RONA, the maximum RONA RSU Shares will be earned (200% of your target number of RONA RSU Shares indicated above)

  

	 	•	 	 The number of RONA RSU Shares earned if the final 2012 – 2014 RONA is between the threshold and target levels, between the target and “bend
point” levels or between the “bend point” and maximum levels will be determined by linear interpolation (the RONA RSU Shares payout percentage associated with the final RONA) between the relevant payout percentages identified above

 Metric 2: Cumulative Net Income (“Net Income”) 

 

	•	 	 Definition: Reported cumulative net income for calendar years 2012 – 2014 

 

	•	 	 Weight: 30% of Performance-Based RSU Shares granted 

  

	•	 	 Number of Performance-Based RSU Shares related to the Net Income metric (“Net Income RSU Shares”): [—] 

  

	•	 	 Net Income Performance Parameters: 

  

																
	 	  	2012 – 2014
Net Income	 	% of Target Net
Income RSU Shares
Earned (Payout %)	 	Number of Earned Net
Income RSU Shares at
Payout % Level
	 Threshold
	  	 	$	[	—]	 	 	 	50	%	 	 	 	[	—]
	 Target
	  	 	$	[	—]	 	 	 	100	%	 	 	 	[	—]
	 “Bend Point”
	  	 	$	[	—]	 	 	 	150	%	 	 	 	[	—]
	 Maximum
	  	 	$	[	—]	 	 	 	200	%	 	 	 	[	—]

  
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	 	•	 	 If the final Net Income is below the threshold Net Income, no Net Income RSU Shares will be earned 

 

	 	•	 	 If the final Net Income is above the maximum Net Income, the maximum Net Income RSU Shares will be earned (200% of your target number of Net Income RSU
Shares indicated above) 

  

	 	•	 	 The number of Net Income RSU Shares earned if the final 2012 – 2014 Net Income is between the threshold and target levels, between the target and
“bend point” levels or between the “bend point” and maximum levels will be determined by linear interpolation (the Net Income RSU Shares payout percentage associated with the final Net Income) between the relevant payout
percentages identified above 

 Metric 3: Relative Total Shareholder Return (“TSR”) 

  

	•	 	 Definition: Percentage change in the average closing price per share of all available trading days in the 4th quarter of 2014 compared to average
closing price per share of all available trading days in the 4th quarter of 2011, measured against the market capitalization–weighted Russell 3000 Auto Parts Index; all measures include dividends 

 

	•	 	 Weight: 20% of Performance-Based RSU Shares granted 

  

	•	 	 Number of Performance-Based RSU Shares related to the TSR metric (“TSR RSU Shares”):
[—] 

  

	•	 	 TSR Performance Parameters: 

  

					
	 2012 – 2014 TSR as a percentile

of the Russell 3000 Auto Parts
 Index
	  	% of Target TSR RSU
Shares Earned
(Payout %)	 	Number of Earned TSR
RSU Shares at Payout %
Level
	 30th to 39th percentile
	  	50%	 	[—]
	 40th to 49th percentile
	  	75%	 	[—]
	 50th to 59th percentile
	  	100%	 	[—]
	 60th to 69th percentile
	  	125%	 	[—]
	 70th to 79th percentile
	  	150%	 	[—]
	 80th to 89th percentile
	  	175%	 	[—]
	 90th percentile and above
	  	200%	 	[—]

  

	 	•	 	 If the final TSR is below the 30th percentile, no TSR RSU Shares will be earned 

 

	 	•	 	 If the final TSR is at or above the 90th percentile, the maximum TSR RSU Shares will be earned (200% of your target number of TSR RSU Shares indicated
above) 

  

	 	•	 	 Fractional percentiles will be rounded using conventional rounding methods 

 Total Earned Performance-Based RSU Shares 
 The total number of Earned
Performance-Based RSU Shares shall equal the sum of: 
  

	(a)	the number of earned RONA RSU Shares, 

  

	(b)	the number of earned Net Income RSU Shares, and 

  

	(c)	the number of earned TSR RSU Shares. 

  
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 Attachment C 
 CONFIDENTIALITY AND NONINTERFERENCE AGREEMENT 
 In recognition of the
critical role that you play as an executive with Delphi Automotive PLC and/or one of its direct or indirect subsidiaries or affiliates (collectively, “Delphi” or the “Company”), and as consideration
for any and all awards to be granted to you under the Delphi Automotive PLC Long Term Incentive Plan (the “Plan”) and/or for other good and valuable consideration, you (“Employee” or
“you”) agree to the terms and conditions of this Confidentiality and Noninterference Agreement (this “Agreement”) as follows: 
 1. Covenants. 
 (a) You acknowledge and agree that: (i) as an
executive, you have been and will be exposed to some of the most sensitive and confidential information possessed by or relating to Delphi, including strategic plans, marketing plans, information regarding long-term business opportunities and
information regarding the development status of specific Company products, as well as extensive assessments of the competitive landscape of the industries in which the Company competes; and (ii) this information represents the product of the
Company’s substantial investment in research and innovation, is critical to the Company’s competitive success, is disclosed to the Company’s executives only on a strictly confidential basis, and is not made accessible to the public or
to the Company’s competitors. 
 (b) You further acknowledge and agree that: (i) the business in which the Company is
engaged is intensely competitive and that your position and employment by Delphi has required, and will continue to require, that you have access to, and knowledge of, valuable and sensitive information relating to Delphi and its business including,
but not limited to, information relating to its products and product development, pricing, engineering and design specifications, trade secrets, customers, suppliers, unique and/or proprietary software and source code, and marketing plans
(collectively, “Confidential Information”); (ii) the direct or indirect disclosure of such Confidential Information would place the Company at a serious competitive disadvantage and would do serious damage, financial and
otherwise, to the business of the Company and may constitute misappropriation and/or improper use of trade secrets in violation of applicable laws; (iii) you have been and will be given access to, and have been or will be able to develop
relationships with, customers, suppliers and employees of the Company at the time and expense of the Company; and (iv) by your training, experience and expertise, your services to the Company are, and will continue to be, extraordinary, special
and unique. 

  
 C-1

 (c) You acknowledge and agree that you will keep in strict confidence, and will not,
directly or indirectly, at any time during or after your employment with Delphi, disclose, furnish, disseminate, make available or use Confidential Information of the Company or its customers or suppliers, without limitation as to when or how you
may have acquired such information, other than in the proper performance of your duties to Delphi, unless and until such Confidential Information is or shall become general public knowledge through no fault of yours. You specifically acknowledge
that all such information, whether written or oral, or in electronic format, or maintained in your mind or memory and whether compiled by the Company, and/or you, derives independent economic value from not being readily known to or ascertainable by
proper means by others who can obtain economic value from its disclosure or use, that reasonable efforts have been made by the Company to maintain the secrecy of such information, that such information is the sole property of the Company and that
any retention and use of such information by you during or after your employment with Delphi (except in the course of performing your duties and obligations as an executive) shall constitute a misappropriation of the Company’s trade secrets. In
the event that you are required by law to disclose any Confidential Information, you agree to give Delphi prompt advance written notice thereof and to provide Delphi with reasonable assistance in obtaining an order to protect the Confidential
Information from public disclosure. 
 (d) You acknowledge and agree that: (i) the Business (as defined below) is intensely
competitive and conducted by Delphi throughout the world; and (ii) reasonable limits on your ability to engage in activities that are competitive with Delphi are warranted in order to, among other things, reasonably protect the Confidential
Information of Delphi and Delphi’s reputation, customer relationships, goodwill and overall status in the marketplace for which Delphi has invested substantial time and resources. You acknowledge and agree that: 

(i) During your employment and for twelve (12) months after the termination of your employment by you or by Delphi
for any reason, you will not directly or indirectly engage in Competition (as defined below) with Delphi; or 

(ii) During your employment and for twenty-four (24) months after the termination of your employment by you or by
Delphi for any reason, you will not directly or indirectly: 
 (1) Solicit for your benefit or the benefit of
any other person or entity, business of the same or of a similar nature to the Business (as defined below) from any customer that is doing business with Delphi, provided that after termination of your employment, this restriction shall not apply to
any entity that was not a customer of Delphi during the six (6) month period immediately preceding the termination of your employment; 

  
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 (2) Solicit for your benefit or the benefit of any other person or entity
from any known potential customer of Delphi, business of the same or of a similar nature to the Business that has been the subject of a known written or oral bid, offer or proposal by Delphi, or of substantial preparation with a view to making such
a bid, proposal or offer, provided that after termination of your employment, this restriction shall only apply to a potential customer if the bid, proposal or offer, or substantial preparation for making a bid, proposal or offer occurred during the
six (6) month period immediately preceding the termination of your employment; or 
 (3) Otherwise
interfere with the Business of Delphi, including, but not limited to, with respect to any relationship or agreement between Delphi and any supplier to Delphi during the period of your employment, provided that after termination of your employment,
this restriction shall only apply to relationships or agreements in effect during the six (6) month period immediately preceding the termination of your employment; or 

(4) Solicit for your benefit or the benefit of any other person or entity, the employment or services of, or hire or
engage, any individual who was known to be employed or engaged by Delphi during the period of your employment, provided that after the termination of your employment, this restriction shall only apply to individuals who were so employed or engaged
during the six (6) month period immediately preceding the termination of your employment, and provided further, that this restriction will not prohibit solicitation or hiring of any individual whose employment was involuntarily terminated by
Delphi, provided at the time of such solicitation or hiring you are not engaged in Competition with Delphi and no solicitation of such individual occurred while he or she was employed by Delphi. 

2. Definitions. 
 (a) For purposes of this Agreement, “Competition” by you shall mean your engaging in, or otherwise directly or indirectly being employed by or acting as a consultant or lender to,
or being a director, officer, employee, principal, agent, shareholder, member, owner or partner of, or permitting your name to be used in connection with the activities of any other business or organization anywhere in the world that competes,
directly or indirectly, with Delphi in the Business; provided, however, it shall not be a violation of this Agreement for you to become the registered or beneficial owner of up to five percent (5%) of any class of share of any entity in
Competition with Delphi that is publicly traded on a recognized domestic or foreign securities exchange, provided that you do not otherwise participate in the business of such corporation. 

  
 C-3

 (b) For purposes of this Agreement, “Business” means the creation,
development, manufacture, sale, promotion and distribution of vehicle electronics, transportation components, integrated systems and modules, electronic technology and other products and services which Delphi engages in, or is preparing to become
engaged in, at the time of your termination. 
 3. Acknowledgements. You acknowledge that the Company would suffer
irreparable harm if you fail to comply with Paragraph 1, and that the Company would be entitled to any appropriate relief, including money damages, equitable relief and attorneys’ fees. You further acknowledge that enforcement of the
covenants in Paragraph 1 is necessary to ensure the protection and continuity of the business and goodwill of the Company and that, due to the proprietary nature of the business of the Company, the restrictions set forth in Paragraph 1 are
reasonable as to geography, duration and scope. 
 4. Awards. For purposes of the Plan and any awards thereunder
(“Awards”), if you engage in conduct in breach of this Agreement prior to or at any time within the one (1) year period after you receive a payment pursuant to any Award, then such conduct shall be deemed to be a breach
of the terms of such Award, justifying cancellation or rescission of any such Award, as applicable. 
 5. Injunctive
Relief. You agree that the Company would suffer irreparable harm if you were to breach, or threaten to breach, any provision of this Agreement and that the Company would, by reason of such breach or threatened breach, be entitled to injunctive
relief in a court of appropriate jurisdiction, without the need to post any bond, and you further consent and stipulate to the entry of such injunctive relief in such a court prohibiting you from breaching this Agreement. This Paragraph 5 shall
not, however, diminish the right of the Company to claim and recover money damages in addition to injunctive relief. 
 6.
Severability. In the event that any one or more of the provisions of this Agreement shall be held to be invalid or unenforceable, the validity and enforceability of the remaining provisions shall not in any way be affected or impaired
thereby. Moreover, if any one or more of the provisions contained in this Agreement shall be held to be excessively broad as to duration, activity or subject, such provisions shall be construed by limiting and reducing them so as to be enforceable
to the maximum extent allowed by applicable law. Furthermore, a determination in any jurisdiction that this Agreement, in whole or in part, is invalid or unenforceable shall not in any way affect or impair the validity or enforceability of this
Agreement in any other jurisdiction. 
 7. Waiver. The failure of Delphi to enforce any terms, provisions or covenants of
this Agreement shall not be construed as a waiver of the same or of the right of Delphi to enforce the same. Waiver by Delphi of any breach or 

  
 C-4

 
default by you (or by any other employee or former employee of Delphi) of any term or provision of this Agreement (or any similar agreement between Delphi and you or any other employee or former
employee of Delphi) shall not operate as a waiver of any other breach or default. 
 8. Successors and Assigns. This
Agreement shall inure to the benefit of and be binding upon Delphi, any successor organization which shall succeed to Delphi by acquisition, merger, consolidation or operation of law, or by acquisition of assets of Delphi and any assigns. You may
not assign your obligations under this Agreement. 
 9. Disclosure of Existence of Covenants. You agree that while
employed by Delphi and for twenty-four (24) months thereafter, you will communicate the contents of this Agreement to any person, firm, association, partnership, corporation or other entity which you intend to be employed by, associated with or
represent. 
 10. Notice to Delphi of Prospective Position. You agree that you will promptly notify the Vice President and
General Counsel and the Vice President of Human Resources of Delphi if, at any time during your employment or within twenty-four (24) months following the termination of your employment with Delphi, you accept a position to be employed by,
associated with or represent any person, firm, association, partnership, corporation or other entity. You further agree that you will provide Delphi with such information as Delphi may request about your new position to allow Delphi to determine
whether such position and duties would likely lead to a violation of this Agreement (except that you need not provide any information that would constitute confidential or trade secret information). 

11. No Oral Modification. This Agreement may not be changed orally, but may be changed only in a writing signed by the Employee and
a duly authorized representative of Delphi. 
 12. Entire Agreement. Although this Agreement sets forth the entire
understanding between you and Delphi concerning its subject matter, this Agreement does not impair, diminish, restrict or waive any other restrictive covenant, nondisclosure obligation or confidentiality obligation you may have to Delphi under any
other agreement, policy, plan or program of Delphi. You and Delphi represent that, in executing this Agreement, the Employee and Delphi have not relied upon any representations or statements made, other than those set forth herein, with regard to
the subject matter, basis or effect of this Agreement. 
 13. Governing Law. The validity, interpretation, construction
and performance of this Agreement shall be governed by the laws of the State of New York, without regard to its conflicts of law principles. The parties hereby irrevocably consent and submit to the

  
 C-5

 
jurisdiction of the federal and state courts located within the state of Michigan in any matter arising out of or in connection with, this Agreement. 

I,                     , have
executed this Confidentiality and Noninterference Agreement on the respective date set forth below: 
  

					
	
Date:                       
   
	 		 	
		 		 	  

		 		 	 (Signature)
  

		 		 	  

		 		 	(Type/Print Name)

  
 C-6EX-10.52

 Exhibit 10.52 
 TERMINATION AGREEMENT 
 This TERMINATION AGREEMENT
(this “Agreement”), dated as of October 31, 2011 (the “Effective Date”), is entered into by and between Advanced Technology Materials, Inc., a Delaware corporation (“ATMI”), and Matheson
Tri-Gas, Inc., a Delaware corporation (“MTG”). 
 WHEREAS, MTG and ATMI have previously entered
into the Legacy Agreements pursuant to which ATMI has granted to MTG the right to manufacture, market, sell and/or distribute certain products; 
 WHEREAS, MTG and ATMI mutually desire to terminate the Legacy Agreements; and 
 WHEREAS, in addition to the termination of the Legacy Agreements, the parties to this Agreement desire that ATMI or certain ATMI Affiliates purchase from MTG or certain MTG Affiliates, and MTG or certain
MTG Affiliates sell to ATMI or certain ATMI Affiliates, the Acquired Assets, which Acquired Assets relate to MTG’s operation of the Legacy Agreements. 
 NOW, THEREFORE, in consideration of the mutual covenants, agreements and understandings herein contained, the receipt and sufficiency of which is hereby acknowledged, the parties hereto hereby agree as
follows: 
 ARTICLE I 
 TERMINATION OF LEGACY AGREEMENTS 
 1.1 Termination.
Subject to Section 1.2 with respect to the survival of the specified provisions of the Legacy Agreements referenced therein and the payment obligations under the Legacy Agreements, including the Manufacturing Fees, the Legacy Agreements
are hereby terminated as of the Effective Date, and all obligations of the parties under the Legacy Agreements shall be deemed satisfied and completed without any further liability to either party. 

1.2 Survival. Notwithstanding anything to the contrary in the Legacy Agreements or this Agreement, the following
provisions of the Legacy Agreements (and, for the avoidance of doubt, no other provisions contained therein) shall survive the termination thereof: 
 (a) With respect to the SDS Agreement, Sections 7.09 (solely with respect to the Current Year Accounting Statements as further set forth in this Section 1.2), 12.01(c), (d) and
(f) and Article XVI (except for Section 16.02(b) therein and subject to Section 1.3). For the avoidance of doubt, Sections 3.04, 12.01(a), (b), (e) and (g) and 16.02(b) shall not survive the termination of the
SDS Agreement; and 
 (b) With respect to the VAC Agreement, Sections 3.08 (solely with respect to the Current
Year Accounting Statements as further set forth in this Section 1.2), 5.07 (Indemnity), 6.04 (Product Limited Warranty), 6.05 (Disclaimer of Warranties), 6.06 (Limitation of Liabilities), 6.07 (Indemnity), 7.04 (Termination), and
Articles IX (Confidentiality) and XI (Miscellaneous). 
 In addition to the survival of the foregoing
provisions, MTG shall deliver to ATMI: (x) within ten (10) days after the Effective Date, a true and complete copy of the Current Year Accounting 

 Statements (excluding the SDS RDGMA files), and (y) within thirty (30) days after
the Effective Date, the SDS RDGMA files and any amounts due to ATMI under the Legacy Agreements as of the Effective Date. With respect to the survival of Section 7.09 of the SDS Agreement pursuant to Section 1.2(a) and
Section 3.08 of the VAC Agreement pursuant to Section 1.2(b), ATMI shall continue to have the right to audit solely with respect to the calculation of the Current Year Accounting Statements. Any amounts revealed as past due by MTG
under such Legacy Agreements in connection with such audit by ATMI shall be paid by MTG within ten (10) days of MTG’s receipt of ATMI’s notice thereof; provided, that any such audit must be completed and any claim in connection
therewith must be made within ninety (90) days following the date that MTG provides the Current Year Accounting Statements to ATMI, and provided, further, that in the event MTG disputes such amounts then the parties will resort to
the dispute resolution procedure set forth in Section 8.7. For the avoidance of doubt, ATMI shall have no right to audit or make any claims under Section 7.09 of the SDS Agreement or Section 3.08 of the VAC Agreement with
respect to any period prior to January 1, 2011, and all such rights and claims are forever released as set forth in Section 1.4. Notwithstanding anything to the contrary contained in this Section 1.2, ATMI agrees that
for the 2011 calendar year the limitations set forth in Section 7.03(d), (e), (f) and (g) of the SDS Agreement with respect to ASP (as therein defined) shall not apply in calculating the Related Distributor Gross Margin Percentage (as
therein defined). MTG shall calculate the Related Distributor Gross Margin Percentage for the 2011 calendar year as part of the Current Year Accounting Statements. 

1.3 Confidentiality Pursuant to the SDS Agreement. Notwithstanding anything to the contrary in
Section 16.02(a) of the SDS Agreement regarding the term of MTG’s obligations of confidentiality thereunder, MTG’s obligations of confidentiality, as set forth therein, shall remain in effect perpetually with respect to the Technical
Information (as defined in the SDS Agreement) disclosed by ATMI to MTG under the SDS Agreement through the Effective Date. The provisions of this Section 1.3 shall not apply to any Technical Information which after the Effective Date, is
published, or becomes known publicly, or is otherwise legally available for use by the public through no fault of MTG. 
 1.4 Limited Mutual Release. 
 (a) MTG, on its behalf, and
on behalf of its owners, shareholders, members, affiliates, divisions, subsidiaries, predecessors, successors, assigns, agents, directors, officers, partners, employees, and representatives (collectively, the “MTG Release Parties”),
hereby generally releases, acquits and forever discharges ATMI and its owners, shareholders, members, affiliates, divisions, subsidiaries, predecessors, successors, assigns, agents, directors, officers, partners, employees, and representatives
(collectively, the “ATMI Release Parties”) of and from any and all Liabilities, rights, remedies, demands, damages, controversies, actions, causes of action, suits, complaints, indebtedness, liens, encumbrances, promises, costs,
fees, penalties, losses or relief of whatever nature or character, whether at law, in equity, or mixed, known or unknown, whether based on statutory or regulatory authority, common law, contract, tort or other basis, that the MTG Release Parties may
have, may have had, or hereafter may have, arising under, from or in any way related to the Legacy Agreements (collectively, the “MTG Released Claims”), provided, however, that the MTG Released Claims do not include:
(i) MTG’s right to indemnification from ATMI under Section 5.2(b); (ii) any Liabilities, or extinguish any rights or remedies granted to the MTG Release Parties, which, pursuant to Sections 1.2 and 1.3,
survive 

  
 2 

 
the termination of the Legacy Agreements; or (iii) claims, disputes or litigation arising out of or related to any breach by either party of any of their obligations under this Agreement or
any agreement, the execution of which is contemplated hereunder, including the Transition Services Agreement, the Manufacturing Agreement and the TNSC Japanese Distribution Agreement. 

(b) ATMI, on its behalf, and on behalf of the ATMI Release Parties, hereby generally releases, acquits and forever
discharges the MTG Release Parties of and from any and all Liabilities, rights, remedies, demands, damages, controversies, actions, causes of action, suits, complaints, indebtedness, liens, encumbrances, promises, costs, fees, penalties, losses or
relief of whatever nature or character, whether at law, in equity, or mixed, known or unknown, whether based on statutory or regulatory authority, common law, contract, tort or other basis, that the ATMI Release Parties, may have, may have had, or
hereafter may have, arising under, from or in any way related to the Legacy Agreements (collectively, the “ATMI Released Claims”), provided, however, that the ATMI Released Claims do not include: (i) ATMI’s
right to indemnification from MTG under Section 5.2(a); (ii) any Liabilities, or extinguish any rights or remedies granted to the ATMI Release Parties, which, pursuant to Sections 1.2 and 1.3 of this Agreement, survive
the termination of the Legacy Agreements; or (iii) claims, disputes or litigation arising out of or related to any breach by either party of any of their obligations under this Agreement or any agreement, the execution of which is contemplated
hereunder, including the Transition Services Agreement, the Manufacturing Agreement and the TNSC Japanese Distribution Agreement. 
 (c) The releases set forth in Sections 1.4(a) and 1.4(b) (the “Mutual Release”) extend to claims which either of the parties does not know or suspect to exist in its favor,
which if known by it would have materially affected its decision to enter into this Agreement. In connection with the waiver and relinquishment set forth in the Mutual Release, each party acknowledges that it is aware that, after executing this
agreement, such party or its attorneys or agents may discover claims or facts in addition to or different from those which it now knows or believes to exist with respect to the subject matter of this Mutual Release, but that it is its intention
hereby to fully, finally, and forever settle and release all of the claims, matters, disputes and differences, whether known or unknown, suspected or unsuspected, which now exist, may exist, or heretofore may have existed against the other party,
and which arise under, out of or in any way relate to the Legacy Agreements. In furtherance of this intention, the Mutual Release shall be and remain in effect as a full and complete release notwithstanding the discovery or existence of any such
additional or different claim or fact. 
 (d) Each party represents, warrants and covenants that: 

(i) it is duly authorized and empowered to execute and enter into this Mutual Release; 

(ii) it has received independent legal advice from its attorneys with respect to the advisability of
executing this Mutual Release; 
 (iii) it has made such investigation of the facts pertaining
to this Mutual Release and of all matters pertaining thereto as it deemed necessary; 

  
 3 

 (iv) neither it nor any Person acting for or on its behalf
has filed any lawsuit, charge, complaint, petition or accusatory pleading against the other party with any federal, state or local governmental agency or in any court, based upon, arising out of or related to the Legacy Agreements; and neither it
nor any other Person acting for or on its behalf will hereafter file, cause to be filed, or otherwise voluntarily participate, in any manner whatsoever, in the filing, investigation and/or prosecution of any lawsuit, charge, complaint, petition or
accusatory pleading in any court or with any governmental agency concerning any matter released pursuant to the Mutual Release; 
 (v) there are no Proceedings pending or, to its Knowledge threatened, that challenge the execution, delivery and performance by either of the parties of the Mutual Release; and 

(vi) there has been no assignment or other transfer by it or on its behalf prior to the Effective Date of
any interest in any claim or other right released under the Mutual Release. 
 (e) Each of the
parties agrees and acknowledges that the execution and delivery of the Mutual Release shall not constitute or be construed as an admission of any Liability whatsoever by either the MTG Release Parties or the ATMI Release Parties. 

ARTICLE II 

ASSET PURCHASE 
 2.1 Asset Purchase. 
 (a) Acquired Assets.

 (i) Subject to the terms and conditions of this Agreement, MTG, on behalf of itself and its
Affiliates, hereby sells, conveys, assigns and transfers to ATMI or its designated Affiliates, as the case may be, and ATMI, on behalf of itself and its Affiliates, hereby purchases, acquires and accepts from MTG, or one or more of its Affiliates,
as the case may be, free and clear of all Liens, all of MTG’s and its Affiliates’ right, title and interest in and to the Day One Acquired Assets, subject to the Assumed Liabilities. 

(ii) Subject to the terms and conditions of this Agreement, MTG shall (or shall cause its Affiliate to)
sell, convey, assign and transfer the applicable Subsequently Acquired Assets to ATMI or its designated Affiliates, and ATMI or its designated Affiliates shall purchase, acquire and accept from MTG or its Affiliates, free and clear of all Liens, all
of MTG’s or its Affiliates’, as the case may be, right, title and interest in and to the applicable Subsequently Acquired Assets upon the date of termination of the Support Services (as defined in the Transition Services Agreement) for the
region in the Territory in which such Subsequently Acquired Assets are located, as provided in the Transition Services Agreement (each, a “Subsequent Transfer”). 

  
 4 

 (b) Assumed Liabilities. Subject to the terms and conditions of this
Agreement, MTG hereby assigns and transfers to ATMI, and ATMI hereby assumes, the Assumed Liabilities. 
 (c)
Excluded Assets and Excluded Liabilities. Notwithstanding anything to the contrary in this Agreement, ATMI shall not acquire or assume nor be deemed to acquire or assume and shall have no responsibility or obligation with respect to any of
the Excluded Assets or Excluded Liabilities. 
 (d) Payment of Cash Consideration and Other Fees. Subject
to the terms and conditions of this Agreement, in exchange for the termination of the Legacy Agreements and the purchase of the Day One Acquired Assets pursuant to Section 2.1(a)(i) and the assumption of the Assumed Liabilities pursuant
to Section 2.1(b), on the Effective Date ATMI or its designated Affiliate shall pay to MTG or its designated Affiliate, the Cash Consideration, and within ten (10) days after MTG’s delivery to ATMI of the Trued-Up Gas Inventory
Statement pursuant to Section 6.8, ATMI shall cause ATMI GmbH to pay Matheson Tri-Gas Europe GmbH the Inventory Purchase Price for the European Gas Inventory. Further, in consideration for certain manufacturing services provided by MTG
or its Affiliates under the Legacy Agreements, within ten (10) days after MTG’s delivery to ATMI of the Trued-Up Gas Inventory Statement pursuant to Section 6.8, ATMI shall pay or cause its designated Affiliate to pay MTG or
its designated Affiliate the Manufacturing Fees for the U.S. Gas Inventory and Korean Gas Inventory. The foregoing payments shall be made by wire transfer of immediately available funds in accordance with the payment information set forth on
Schedule 2.1(d). Subject to the terms and conditions of this Agreement, at each Subsequent Transfer, ATMI shall, pursuant to Section 2.5(c), pay or cause its designated Affiliate to pay to MTG or its designated Affiliate the
Inventory Purchase Price for the Subsequently Acquired Assets being acquired at such Subsequent Transfer. 
 (e)
Payment of Sales Commissions. Upon any Gas Inventory existing as of the Effective Date for which ATMI previously paid to MTG a sales commission (each, a “Sales Commission”) being either: (i) sold to an End Customer; or
(ii) transferred by MTG or its Affiliate to ATMI or its Affiliate in a Subsequent Transfer; or (iii) transferred by MTG or its Affiliate to ATMI or its Affiliate as part of the sale of the European Gas Inventory, MTG or one of its
Affiliates shall refund to ATMI or its designated Affiliate such Sales Commission, in cash. A schedule setting forth the Sales Commissions is attached as Schedule 2.1(e) hereto. 

2.2 Consents. 
 (a) General. The parties each agree and acknowledge that neither party has, as of the Effective Date: (i) delivered any notice to any counterparty to any of the Assumed Contracts; or
(ii) obtained any consent from any counterparty to any of the Assumed Contracts, in each case concerning the Transfer of the Assumed Contracts from MTG or its Affiliate to ATMI or its Affiliate required under the terms and conditions of such
Assumed Contracts. 
 (b) Consents and Approvals. Notwithstanding anything to the contrary herein, in the
event that any Acquired Assets, or any legal claim, right or benefit arising thereunder or resulting therefrom, cannot be Transferred by MTG or its Affiliate to ATMI or its Affiliate on the Effective Date in accordance with applicable Law or the
terms and conditions of 

  
 5 

 
the Acquired Asset because any applicable waiting or notice period has not expired or any consents or approvals required for such Transfer have not been obtained or waived (other than the
consents or approvals required from MTG or ATMI, or any of their respective Affiliates), then the legal interest in such Acquired Assets shall not be Transferred by MTG or its Affiliate to ATMI or its Affiliate unless and until such waiting or
notice period shall have expired or until such consent or approval, or waiver thereof, is obtained. MTG shall have the continuing obligation, both prior to and after the consummation of the Transactions to, and shall cause its Affiliates to, use
commercially reasonable efforts to obtain all necessary consents to, or approvals for, and make any filings for, the Transfer of the Acquired Assets and, upon obtaining such consents or approvals or making of required filings and notices or the
expiration or termination of any applicable waiting or notice periods, such Acquired Assets shall be Transferred by MTG or its Affiliate to ATMI or its Affiliate; provided, however, that neither MTG nor its Affiliates shall have any
obligation to obtain any such consent or approval for the Transfer of an Assumed Contract hereunder until (i) after the Effective Date, and (ii) ATMI has delivered to MTG or its Affiliate a written request that MTG or its Affiliate obtain
such consent or approval, it being understood that in the event MTG or any of its Affiliates is notified by any counterparty to an Assumed Contract that any such consent or approval for the Transfer of such Assumed Contract is required to be
obtained from such counterparty, MTG shall promptly provide written notice thereof to ATMI. Further, notwithstanding anything to the contrary in this Section 2.2(b), neither MTG nor its Affiliates shall be required to continue to seek
any such consent or approval for the Transfer of an Assumed Contract if either (A) such consent or approval has not been obtained within ninety (90) days of the Effective Date (assuming compliance by MTG with its obligations hereunder) or
(B) the expenses previously incurred by MTG in pursuing all consents and approvals addressed by this Section 2.2(b), together with the additional expenses expected to be incurred by MTG in pursuing any additional required consent or
approval hereunder, would reasonably be expected to exceed ten thousand dollars ($10,000.00) in the aggregate, except to the extent that ATMI reimburses MTG for any expenses in excess of such $10,000.00 amount). 

(c) Contracts Not Transferred. With respect to any Assumed Contract that is not Transferred to, and assumed by,
ATMI or its Affiliate on the Effective Date by reason of any required consent or approval described in Section 2.2(b) not having been obtained or any applicable waiting or notice periods not having expired or terminated, MTG shall, and
if applicable, shall cause its Affiliates to, continue to act as a contractual party to such Assumed Contract for the duration of and pursuant to the terms and conditions of the Transition Services Agreement and shall provide any rights or benefits
received or available from such Assumed Contract to ATMI in accordance with reasonable instructions from ATMI; provided, however, that MTG shall not be required to take any action that is inconsistent with the terms and conditions of such
Assumed Contract. Subject to the foregoing, ATMI shall have the sole and exclusive right to direct and control the exercise or waiver of any right under such Assumed Contract, including negotiations regarding and modifications to such Assumed
Contract involving changes in pricing. 
 (d) Sole Obligation. MTG’s sole obligation with respect to
Transfer of the Acquired Assets shall be as detailed in Sections 2.2(a), (b) and (c). In no event will the Cash Consideration be reduced or ATMI be entitled to any other compensation in the event that any Acquired Asset
cannot be Transferred by MTG or its Affiliate to ATMI or its Affiliate due to 

  
 6 

 
any consent or approval of any Government Entity or counterparty to such Acquired Asset concerning such Transfer required under applicable Law or the terms and conditions of such Acquired Assets
not having been obtained despite MTG having satisfied its obligations under Sections 2.2(a), (b) and (c). 
 2.3 Effective Date Deliveries. Upon the Effective Date: 

(a) Assets and Liabilities. MTG and ATMI shall deliver to each other duly executed counterparts of the Cylinder
Bill of Sale, the U.S. Gas Inventory Bill of Sale, the Assignment and Assumption Agreement, the Trademark Assignment and all other instruments, assignments and other documents and records which may be necessary or appropriate for conveying to ATMI
good and legal title, free and clear of all Liens, to all of the Day One Acquired Assets. MTG shall: (i) cause its Affiliate, Taiyo Nippon Sanso Corporation (“TNSC”), to deliver to ATMI a duly executed counterpart of the
Cylinder Bill of Sale, and (ii) cause its Affiliate, Matheson Tri-Gas Europe GmbH, to deliver to ATMI a duly executed counterpart of the European Gas Inventory Bill of Sale. ATMI shall cause its Affiliate ATMI GmbH to deliver to MTG a duly
executed counterpart of the European Gas Inventory Bill of Sale. 
 (b) Payment of Cash Payment. ATMI
shall pay (or cause to be paid) to MTG the Cash Consideration to one or more accounts as designated by MTG. 

(c) Consents. MTG shall deliver to ATMI evidence satisfactory to ATMI of all of the filings and all
authorizations, consents and approvals required in connection with the consummation of the Transactions, each of which are set forth on Schedule 2.3(c) (other than such consents or approvals for the Transfer of Assumed Contracts), it
being agreed and acknowledged that: (i) ATMI shall accept assignment of the Ceradyne BF3 Supplier Contract on January 1, 2012, subject to MTG obtaining the appropriate consent to such assignment from Ceradyne pursuant to
Section 2.2(b); and (ii) the Nukem BF3 Supplier Contract will be retained by MTG until its December 31, 2011 expiration date, but will be subject to Section 2.2(c). 

(d) UCC-3s. MTG shall deliver to ATMI fully executed UCC-3s and other terminations, pay-offs and/or releases, or,
at ATMI’s option, assignments, necessary to terminate, release or assign, as the case may be, all Liens on the Acquired Assets. 
 (e) Transition Services Agreement. MTG and ATMI shall deliver to each other duly executed counterparts of the Transition Services Agreement. 

(f) Manufacturing Agreement. MTG and ATMI shall deliver to each other duly executed counterparts of the
Manufacturing Agreement. 
 (g) TNSC Japanese Distribution Agreement. MTG shall cause TNSC to deliver an
executed counterpart to, and ATMI shall deliver to TNSC an executed counterpart to, the TNSC Japanese Distribution Agreement. 
 (h) TNSC Side Letter. MTG shall deliver to ATMI, and shall cause TNSC to deliver to ATMI, an executed counterpart to, and ATMI shall deliver to MTG an executed counterpart to, the TNSC Side Letter.

  
 7 

 2.4 Delivery of Trued-Up Gas Inventory Statement; Payment of Inventory
Purchase Price and Manufacturing Fee for Day One Gas Inventory. MTG shall, pursuant to Section 6.8, deliver to ATMI the Trued-Up Gas Inventory Statement within twenty (20) days after the Effective Date. Within ten (10) days after
receipt of such Trued-Up Gas Inventory Statement, ATMI shall (i) pay to MTG the Manufacturing Fees for the U.S. Gas Inventory and Korean Gas Inventory, and (ii) cause ATMI GmbH to pay to Matheson Tri-Gas Europe GmbH the Inventory Purchase
Price for the European Gas Inventory, in each case to one or more accounts as designated by MTG and set forth in the Trued-Up Gas Inventory Statement. 
 2.5 Subsequently Acquired Assets Deliveries. In connection with each Subsequent Transfer: 
 (a) Bill of Sale. MTG or its designated Affiliate and ATMI or its designated Affiliate shall deliver to each other duly executed counterparts of a Subsequent Bill of Sale with respect to the
Subsequently Acquired Assets being transferred in such Subsequent Transfer; 
 (b) Officer’s
Certificate. MTG shall deliver to ATMI a certificate executed by an officer of MTG confirming that the representations and warranties set forth in Sections 3.1 (Organization and Corporate Power), 3.2 (Authorization); 3.3
(MTG-Owned Cylinders and Gas Inventory); 3.4 (Product Warranty and Product Liability); 3.6 (Assets); and 3.10 (Compliance With Laws) are each true and correct with respect to the Subsequently Acquired Assets being transferred in
such Subsequent Transfer as of the date of such Subsequent Transfer; and 
 (c) Payment of Inventory Purchase
Price. ATMI or its designated Affiliate shall pay MTG or its designated Affiliate the Inventory Purchase Price for the Subsequently Acquired Assets being transferred in such Subsequent Transfer. 

2.6 Allocation. The Cash Consideration (plus Assumed Liabilities, to the extent properly taken into account under
the Code), shall be allocated between: (a) the Acquired Assets and (b) the restrictive covenants set forth in Section 6.2(a), which allocation shall be agreed upon between the parties hereto within sixty (60) days after the
Effective Date (the “Allocation”). ATMI and MTG shall file all Tax Returns (including Internal Revenue Service Form 8594) consistent with the Allocation. 

2.7 Withholding. The parties agree that ATMI or its Affiliate, and MTG or its Affiliate, shall each be permitted
to withhold any taxes based on the sale of Gas Inventory required by Law. AMTI or its Affiliate or MTG or its Affiliate (as applicable) shall promptly pay all such amounts withheld to the applicable Government Entity. 

ARTICLE III 

REPRESENTATIONS AND WARRANTIES REGARDING MTG 

As a material inducement to ATMI to enter into this Agreement and to consummate the Transactions, MTG represents and
warrants to ATMI the following as of the Effective Date: 
 3.1 Organization and Corporate Power. MTG and
each of its Affiliates that either (a) hold any Acquired Assets, or (b) have performed services for or on behalf of MTG in MTG’s operation of the Business prior to the Effective Date (collectively, the “Applicable
Affiliates”) 

  
 8 

 
are duly organized, validly existing and in good standing under the laws of their respective jurisdictions of formation. MTG possesses all requisite power and authority necessary to execute and
deliver this Agreement, and MTG and its Applicable Affiliates possess all requisite power and authority necessary to own and operate the Acquired Assets and to carry out the Transactions. 

3.2 Authorization; No Breach. 

(a) MTG’s execution, delivery and performance of this Agreement (including the Mutual Release) and all other
agreements and instruments contemplated hereby to which it is a party have been duly authorized by MTG. This Agreement (including the Mutual Release) constitutes a valid and binding obligation of MTG, enforceable in accordance with its terms, and
all other agreements and instruments contemplated hereby to which MTG is a party, when executed and delivered by MTG in accordance with the terms hereof, shall each constitute a valid and binding obligation of MTG, enforceable in accordance with its
terms, except as may be limited by applicable bankruptcy, insolvency or similar laws affecting creditors rights generally or by general principles of equity. 
 (b) Except as set forth on Schedule 3.2(b), the execution and delivery by MTG of this Agreement (including the Mutual Release) and all other agreements and instruments contemplated hereby to
which it or any of its Affiliates is a party, and the fulfillment of and compliance with the respective terms hereof and thereof by MTG does not and shall not (i) conflict with or result in a breach of the terms, conditions or provisions of,
(ii) constitute a default under (whether with or without the passage of time, the giving of notice or both), (iii) result in the creation of any Lien on the Acquired Assets pursuant to, (iv) give any third party the right to
materially 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 third party
or any Government Entity pursuant to (A) the applicable charter and other organizational documents of MTG or any of its Applicable Affiliates, (B) any material Law to which MTG, its Applicable Affiliates, or any of the Acquired Assets is
subject, or any order, judgment or decree by which MTG, its Applicable Affiliates, or any of the Acquired Assets are subject or bound, or (C) any material note, bond, mortgage, indenture, deed of trust, Contract (excluding any Assumed Contract
with a Low Volume End Customer) or other instrument or obligation to which MTG or any of its Applicable Affiliates is subject or any of the Acquired Assets is subject to or affected by. Except as set forth on Schedule 3.2(b), the
consummation of the Transactions will not result in the loss or material impairment of MTG’s or any of its Applicable Affiliates’ rights in or to the tangible Acquired Assets, as the case may be. 

3.3 MTG-Owned Cylinders and Gas Inventory. The Acquired Assets consisting of MTG-Owned Cylinders and Gas Inventory
has been maintained in accordance with normal industry practice, are of a quality sufficient for use and sale in the ordinary course of business consistent with past custom and practice (subject to reasonable wear and tear) at selling prices which
will not be subject to reduction from normal market pricing due solely to the failure of such MTG-Owned Cylinders and Gas Inventory to satisfy such quality requirements. 

  
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 3.4 Product Warranty and Product Liability. Except as set forth on
Schedule 3.4, to the Knowledge of MTG, since January 1, 2009, neither MTG nor any of its Applicable Affiliates has committed any act, and there has been no omission, which would reasonably be expected to result in, and there has been no
occurrence which would reasonably be expected to give rise to, product Liability or Liability for breach of warranty (whether express or implied or whether covered by insurance or not) on the part of MTG or its Applicable Affiliates, with respect to
the MTG-Owned Cylinders or Gas Inventory. Except as set forth on Schedule 3.4, none of the MTG-Owned Cylinders or Gas Inventory is subject to any guarantee, warranty or other indemnity of MTG or its Applicable Affiliates to an End
Customer. 
 3.5 Product Defects. 

(a) Schedule 3.5(a) sets forth a list of all Licensed Products which have been recalled, withdrawn or
suspended (whether voluntarily or otherwise) or for which, to the Knowledge of MTG, there is a current plan or has been a discussion regarding such a recall, withdrawal or suspension since January 1, 2009, other than immaterial customer returns
made in the ordinary course of business consistent with past custom and practice. 
 (b) Except as set forth in
Schedule 3.5(b), to the Knowledge of MTG, no set of facts or circumstances exist which would reasonably be expected to cause MTG or its Applicable Affiliates or any customer, third party retained by MTG or its Applicable Affiliates,
distributor or wholesaler to recall, withdraw or suspend any of the Licensed Products filled, marketed, sold or delivered by MTG or its Applicable Affiliates from the market due to a product defect or to cease further distribution or marketing of
such products due to a product defect, other than immaterial customer returns made in the ordinary course of business consistent with past custom and practice. 
 (c) Except as set forth in Schedule 3.5(c), to the Knowledge of MTG, the Licensed Products filled by MTG and its Applicable Affiliates since January 1, 2009, were, at the time of sale,
free from defects that could create a material product hazard to consumers or a risk of serious injury or death and conformed in all material respects with all relevant product specifications and standards related to such products. 

3.6 Title to Assets. Either MTG or one of its Applicable Affiliates owns and has good and valid title to each of
the tangible Acquired Assets free and clear of all Liens. 
 3.7 Contracts and Commitments. 

(a) Schedule 3.7(a) lists all High Volume Assumed Contracts as of September 16, 2011. To the Knowledge
of MTG, the High Volume Assumed Contracts are legal, valid, binding and enforceable in accordance with their respective terms, and in full force and effect and no party has repudiated any material provision of any High Volume Assumed Contract.
Neither MTG nor any of its Applicable Affiliates is in receipt of any written claim of default or breach under any High Volume Assumed Contract. Except as set forth in Schedule 3.7(a), to the Knowledge of MTG, no event has occurred which with
the passage of time or the giving of notice or both would result in a default or breach by MTG or its Applicable Affiliates under any High Volume Assumed Contract; and MTG does not have any Knowledge of any existing or threatened breach by the other
parties to any High Volume Assumed Contract. 

  
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 (b) ATMI has been supplied with a true, complete and correct copy of each
written High Volume Assumed Contract, together with all written amendments, waivers or other changes thereto. The data room which MTG has established to facilitate ATMI’s due diligence hereunder contains true, complete and correct copies of all
such High Volume Assumed Contracts, together with all written amendments, waivers or other changes thereto, and ATMI has been given access to all such High Volume Assumed Contracts within such data room. 

3.8 Intellectual Property Rights. Except as set forth in Schedule 3.8, no Proceedings are pending, and
neither MTG nor its Applicable Affiliates have received any written notices (including cease-and-desist letters or offers to license), in each case, alleging any infringement, misappropriation, dilution or other violation of any Intellectual
Property Rights of other Persons in the operation of the Business. 
 3.9 Litigation. Except as set forth
on Schedule 3.9, there are no material Proceedings (including any arbitration Proceedings), grievances, indictments, condemnations, assessments or expropriations pending or, to the Knowledge of MTG, threatened, against or affecting any
of the Acquired Assets or the Business, or pending or , to the Knowledge of MTG, threatened by MTG or its Applicable Affiliates against any third party, at law or in equity, or before or by any Government Entity (including any Proceedings with
respect to the Transactions) involving or related to the Acquired Assets or the Business. Except as set forth on Schedule 3.9, the use or operation of any of the Acquired Assets or Business is not subject to any material judgment, order
or decree of any Government Entity. 
 3.10 Compliance with Laws. In connection with its maintenance and
use of the Acquired Assets and operation of the Business, MTG and its Applicable Affiliates have materially complied and are in material compliance with all applicable Laws. Except as set forth on Schedule 3.10, no notices have been
received by and no claims have been filed against MTG or its Applicable Affiliates alleging a material violation of any applicable Laws that could reasonably be expected to materially adversely affect MTG’s or its Applicable Affiliates’
ownership, use or operations under any of the Acquired Assets or the Business. 
 3.11 Customers,
Distributors and BF3 Suppliers. Schedule 3.11(a) contains a complete and accurate list of all (a) End Customers, (i) showing the approximate total sales to each such End Customer during the calender year ended
December 31, 2010, and (ii) showing the approximate total sales to each such High Volume End Customers during the nine (9) month period from January 1, 2011 to September 30, 2011, and (b) Distributors, showing the
approximate total sales to each such Distributor during the calendar year ended December 31, 2010. Except as set forth on Schedule 3.11(b), no High Volume End Customer, Distributor or BF3 Supplier within the last twelve
(12) months has canceled or otherwise terminated, or to the Knowledge of MTG, intends to cancel or terminate, its relationship with MTG or any of its Affiliates. Except as set forth on Schedule 3.11(c), within the last twelve
(12) months no High Volume End Customer of MTG or its Applicable Affiliates has notified MTG, or to the Knowledge of MTG, has notified its Applicable Affiliates, of any material complaints regarding the Licensed Products manufactured, marketed,
sold or delivered by MTG or its Applicable 

  
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Affiliates or sought any material adjustments to any amounts owed by such High Volume End Customer to MTG or its Applicable Affiliates as a result of the failure of such Licensed Products to
perform in conformity with all applicable contractual commitments. 
 3.12 Business. Except as set forth
on Schedule 3.12, no Affiliates of MTG are engaged in the conduct of the Business. 
 3.13 Exclusivity of
Representations. The representations and warranties made by MTG in this Agreement, the Transition Services Agreement, the Manufacturing Agreement, the TNSC Japanese Distribution Agreement and the TNSC Side Letter are the exclusive
representations and warranties made by MTG and its Affiliates concerning the Transactions and MTG, on behalf of itself and its Affiliates, hereby disclaims any other express or implied representations or warranties. MTG is not, directly or
indirectly, making any representations or warranties regarding the financial information, financial projections or other forward-looking statements (within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the
Securities Exchange Act of 1934) concerning the Business. 
 ARTICLE IV 

REPRESENTATIONS AND WARRANTIES OF ATMI 
 As a material inducement to MTG to enter into this Agreement and to consummate the Transactions, ATMI represents and warrants to MTG the following as of the Effective Date: 

4.1 Organization, Power and Authority. ATMI is duly organized, validly existing and in good standing under the
Laws of its jurisdiction of formation. ATMI possesses all requisite power and authority necessary to execute and deliver this Agreement and carry out the Transactions. 

4.2 Authorization; No Breach. 

(a) The execution, delivery and performance of this Agreement (including the Mutual Release) and all other agreements or
instruments contemplated hereby to which ATMI is a party or by which ATMI is bound have been duly authorized by ATMI. This Agreement (including the Mutual Release) and all other agreements contemplated hereby to which ATMI is a party, when executed
and delivered by ATMI in accordance with the terms hereof, shall each constitute a valid and binding obligation of ATMI, enforceable in accordance with its terms, except as may be limited by applicable bankruptcy, insolvency or similar laws
affecting creditors rights generally or by general principles of equity. 
 (b) Except as set forth on
Schedule 4.2(b), the execution, delivery and performance by ATMI of this Agreement (including the Mutual Release) and all other agreements contemplated hereby to which ATMI is a party, and the fulfillment of and compliance with the
respective terms hereof and thereof by ATMI, 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 (whether with or without the passage of time, the giving
of notice or both), (iii) give any third party the right to modify, terminate or accelerate any obligation under, (iv) result in a violation of, or (v) require any authorization, consent, approval, exemption or other action by or
notice or declaration to, or filing with, any Government Entity pursuant to, (A) the organizational documents of ATMI, (B) any Law to which ATMI is subject, or (C) any material agreement, instrument, order, judgment or decree to which
ATMI is subject. 

  
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 ARTICLE V 
 INDEMNIFICATION 
 5.1 Survival of Representations and
Warranties. The representations and warranties in this Agreement shall survive for the period starting on the Effective Date and ending one (1) year thereafter, except that the representations and warranties set forth in
Sections 3.1, 3.2(a), 4.1, and 4.2(a) (collectively, the “Fundamental Representations”) shall survive indefinitely; provided, that any representation or warranty in respect of which indemnity
may be sought under this Article V, and the indemnity with respect thereto, shall survive the time at which it would otherwise terminate pursuant to this Section 5.1 if notice of the inaccuracy or breach giving rise to such right
of indemnity shall have been given to the party against whom such indemnity is being sought prior to such time. The representations and warranties in this Agreement shall survive for the periods set forth in this Section 5.1 and shall in
no event be affected by any investigation, inquiry or examination made for or on behalf of any Indemnitee, or the Knowledge of any Indemnitee’s officers, directors, shareholders, employees or agents or the acceptance by any Indemnitee of any
certificate hereunder. The agreements and covenants set forth in this Agreement shall survive indefinitely, unless specifically stated otherwise. 
 5.2 General Indemnification. 
 (a) Indemnification
Obligations of MTG. Subject to the last paragraph of this Section 5.2(a), after the Effective Date, MTG shall indemnify ATMI and its Affiliates, officers, directors, employees, agents, representatives, successors and permitted
assigns (collectively, “ATMI Indemnified Parties”) and hold each of them harmless against and pay on behalf of or reimburse ATMI Indemnified Parties as and when incurred for any loss, liability, action, cause of action, cost,
damage, Tax or expense, whether or not arising out of third party claims, including interest, penalties, reasonable attorneys’, consultants’ and experts’ fees and expenses and all amounts paid in investigation, defense or settlement
of any of the foregoing and after deducting all insurance proceeds actually received in connection with any of the foregoing, net of any increase in insurance premiums resulting therefrom (collectively, “Losses”, and each a
“Loss”), which any ATMI Indemnified Party may suffer, sustain or become subject to, as a result of, in connection with, relating or incidental to or by virtue of: 

(i) any facts or circumstances which constitute an inaccuracy or breach of any representation or warranty
of MTG set forth in this Agreement; 
 (ii) any nonfulfillment, non-compliance or breach of any
covenant, agreement or other provision by MTG set forth in this Agreement; 
 (iii) any third
party claims, actions or proceedings brought against the ATMI Indemnified Parties with respect to MTG Non-Compliance Liabilities, MTG Non-Performance Liabilities or MTG Warranty Liabilities; or 

(iv) other than to the extent constituting MTG Non-Compliance Liabilities, MTG Non-Performance
Liabilities or MTG Warranty Liabilities (MTG’s indemnification obligations for which are set forth in clause (iii) above), any Excluded Liability. 

  
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 If and to the extent any provision of this Section 5.2(a) is unenforceable for
any reason, MTG agrees to make the maximum contribution to the payment and satisfaction of the Loss for which indemnification is provided for in this Section 5.2(a) which is permissible under applicable Laws. Notwithstanding anything to
the contrary contained herein, for purposes of this indemnification, MTG shall be liable for any breach of this Agreement by or caused by an MTG Affiliate. 
 (b) Indemnification Obligations of ATMI. Subject to the last paragraph of this Section 5.2(b), after the Effective Date, ATMI shall indemnify MTG and its Affiliates, officers,
directors, employees, agents, representatives, successors and permitted assigns (collectively, “MTG Indemnified Parties”) and hold them harmless against any Losses which any MTG Indemnified Parties may suffer, sustain or become
subject to, as a result of, in connection with, relating or incidental to or by virtue of: 

(i) any facts or circumstances which constitute an inaccuracy or breach of any representation or warranty
of ATMI set forth in this Agreement; 
 (ii) any non-fulfillment, non-compliance or breach of
any covenant, agreement or other provision by ATMI set forth in this Agreement; 
 (iii) any
third party claims, actions or proceedings brought against the MTG Indemnified Parties with respect to ATMI Non-Compliance Liabilities, ATMI Non-Performance Liabilities or ATMI Consent Liabilities; or 

(iv) other than to the extent constituting ATMI Non-Compliance Liabilities, ATMI Non-Performance
Liabilities or ATMI Consent Liabilities (ATMI’s indemnification obligations for which are set forth in clause (iii) above), any Assumed Liability. 
 If and to the extent any provision of this Section 5.2(b) is unenforceable for any reason, ATMI hereby agrees to make the maximum contribution to the payment and satisfaction of the Loss for
which indemnification is provided for in this Section 5.2(b) which is permissible under applicable Laws. Notwithstanding anything to the contrary contained herein, for purposes of this indemnification ATMI shall be liable for any breach
of this Agreement by or caused by an ATMI Affiliate. 
 (c) Limitations on Indemnification.
Notwithstanding the foregoing: 
 (i) Neither party shall be required to indemnify the ATMI
Indemnified Parties or MTG Indemnified Parties, as applicable, in respect of any Losses suffered by such ATMI Indemnified Parties or MTG Indemnified Parties, as applicable, under Sections 5.2(a)(i) or 5.2(b)(i), as applicable
(other than (A) with respect to fraud, willful misconduct or intentional misrepresentations, (B) inaccuracies or breaches of the Fundamental Representations, and (C) ATMI’s indemnification obligation concerning the

  
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matter set forth on Schedule 7.1), for any single Loss or series of related Losses, unless the aggregate of all Losses suffered hereunder by the ATMI Indemnified Parties or MTG
Indemnified Parties, as applicable, exceeds two hundred and fifty thousand dollars ($250,000.00) and then only for such Losses exceeding said sum; 

(ii) Except in the event of (A) fraud, willful misconduct or intentional misrepresentations by
either party hereunder, (B) a breach by either party of the covenants set forth in Section 6.2 (Restrictive Covenants), or (C) ATMI’s indemnification obligation concerning the matter set forth on Schedule 7.1 (in
each case, for which there shall be no limit to the applicable party’s indemnification obligation hereunder), in no event shall the aggregate amount of Losses paid by MTG under Section 5.2(a) or by ATMI under
Section 5.2(b) exceed five million two hundred and fifty thousand dollars ($5,250,000.00); 
 (iii) Except (A) in the event of (1) fraud, willful misconduct or intentional misrepresentations by either party hereunder, or (2) a breach by either party of the covenants set forth in
Section 6.2 (Restrictive Covenants), or (B) with respect to any such damages paid by such Indemnitee to a third party, under no circumstances shall any Indemnitee be entitled to be indemnified for special, consequential, indirect,
punitive or other similar damages, including lost profits, lost revenues, business interruptions, or loss of business opportunity or reputation; 

(iv) No party hereto shall be obligated to indemnify any other Person with respect to any representation,
warranty, covenant or condition specifically waived in writing by the other party. The party seeking indemnification under this Section 5.2 shall use its commercially reasonable efforts to mitigate any Loss which forms the basis of an
indemnification claim hereunder; and 
 (v) If any Person making a claim for indemnification of
Losses under this Section 5.2 (an “Indemnitee”) receives any payment under an applicable insurance policy in respect of such Losses, or from any other Person alleged to be responsible for such Losses, subsequent to
receipt of an indemnification payment in respect of such Losses, then such Indemnitee shall promptly reimburse the indemnifying party (an “Indemnitor”), as applicable, for any payment made or expense incurred by such Indemnitor in
connection with providing such indemnification payment up to the lesser of (A) the amount received by the Indemnitee from such insurance policy or other Person in respect of such Losses, net of any expenses incurred by the Indemnitee in
collecting such amount and net of any increase in premium resulting therefrom, and (B) the excess, if any, of the total amount actually received in respect of such Losses from such insurance policy or other Person and from the indemnification
payment from the Indemnitor over the sum of the total amount of such Losses suffered by the Indemnitee and the expenses incurred by the Indemnitee in collecting such amounts. 

(d) Indemnification Procedures. The parties shall adhere to the indemnification procedures set forth in Exhibit
E and incorporated by reference in and made a part of this Article V. 

  
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 (e) Cash Consideration Adjustment. All indemnification payments under
this Article V shall be deemed adjustments to the Cash Consideration. 
 (f) Materiality
Qualifications. Notwithstanding anything to the contrary in Articles III and IV, the materiality qualifications contained in the representations and warranties of the parties set forth in Articles III and IV (however
they may be phrased) shall not be taken into account for purposes of the parties’ indemnification obligations pursuant to this Article V in determining whether a breach of such representation and warranty has occurred and, if such breach
has occurred, all such materiality qualifications shall be ignored and not given any effect for purposes of determining the amount of Losses resulting from, incurred in connection with, relating or incidental to, or by virtue of, such breach of such
representation and warranty under this Article V. 
 (g) No Indemnification Rights for Released
Claims. Notwithstanding anything to the contrary in this Article V, in no event will: (i) any of the MTG Indemnified Parties have any right to indemnification from ATMI under this Article V with respect to any of the MTG
Released Claims; and (ii) any of the ATMI Indemnified Parties have any right to indemnification from MTG under this Article V with respect to any of the ATMI Released Claims. 

(h) Exclusive Remedy. Except for equitable remedies pursuant to Section 8.16 in connection with any
breach of this Agreement and the surviving obligations under the Legacy Agreements pursuant to Section 1.2, the indemnity obligations under Article V shall be the sole and exclusive remedy for any inaccuracy or breach of any
representation or warranty and any nonfulfillment, non-compliance or breach of any covenant, agreement or other provision under this Agreement. All such rights and remedies shall be cumulative and non-exclusive, and may be exercised singularly or
concurrently. One or more successive actions may be brought, either in the same action or in separate actions, as often as is deemed advisable, until all of the obligations to such Person are paid and performed in full. 

ARTICLE VI 

COVENANTS AND AGREEMENTS 
 Each of the parties hereto agrees as follows with respect to the period after the Effective Date: 
 6.1 Tax Matters. 
 (a) Cooperation. ATMI and MTG
agree to furnish or cause to be furnished to the other parties, upon request, as promptly as practicable, such information and assistance relating to the Acquired Assets, including access to books and records, as is reasonably necessary for the
filing of all Tax Returns by ATMI or MTG, or their respective Affiliates, the making of any election relating to Taxes, the preparation for any audit by any taxing authority and the prosecution or defense of any claim, suit or proceeding relating to
any Tax. Each of ATMI and MTG shall retain all books and records with respect to Taxes pertaining to the Acquired Assets for a period of at least seven (7) years following the date hereof, and shall cause their Affiliates to do the same. ATMI
and MTG shall reasonably cooperate with each other in the conduct of any audit, litigation or other proceeding relating to Taxes involving the Acquired Assets or the Allocation and shall cause their Affiliates to do the same. 

  
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 (b) Certain Taxes. MTG and ATMI shall each be responsible for and pay
fifty percent (50%) of any transfer, documentary, sales, use, stamp, registration and other such Taxes incurred in connection with this Agreement. Each party shall pay its allocable portion of any such Taxes when due and the parties shall
reasonably cooperate with each other concerning the preparation and filing of all necessary Tax Returns and other documentation with respect to all such transfer, documentary, sales, use, stamp, registration and other Taxes. If required by
applicable law, each party will, and will cause its Affiliates to, join in the execution of any such Tax Returns and other documentation. For the avoidance of doubt, the parties agree and acknowledge that this Section 6.1(b) does not
apply to any value-added or similar taxes imposed on the sale of Gas Inventory, which will be paid by the purchaser of the applicable Gas Inventory. 
 6.2 Restrictive Covenants. 
 (a) MTG
agrees that during the period beginning on the date hereof and ending on the seventh (7th) anniversary of the effective date of termination of the Manufacturing Agreement (the “Non-Compete Period”), MTG will not, either on its own or through any Affiliate, joint venture
or by any other entity in which MTG has any interest whatsoever, make, have made, use or sell any Competitive Products in any jurisdiction worldwide within the Field of Use, or be financially interested in or otherwise assist any other Person with
the making, use or sale of any Competitive Products in any jurisdiction worldwide within the Field of Use; provided, however, that, notwithstanding the foregoing, (i) MTG may (A) sell and install Competitive Products pursuant to a
site gas management contract under which MTG provides Site Gas Management Services for a customer, and (B) sell gas and/or liquid product as a High Pressure Product which may be transfilled into a Competitive Product, provided, that
neither MTG nor any Affiliate, joint venture or any other entity in which MTG has any interest may perform or facilitate any such transfilling, (ii) nothing in this Section 6.2(a) shall prevent or restrict MTG from making, having
made, using or selling any products for applications outside the Field of Use, (iii) neither MTG’s activities in compliance with Section 2.2(c) or under the Transition Services Agreement nor TNSC’s activities in compliance
with the TNSC Japanese Distribution Agreement shall constitute a breach of MTG’s obligations under this Section 6.2(a), and (iv) in no event will this Section 6.2(a) be construed as imposing any obligations on MTG
or any of its Affiliates with respect to actions in Japan, it being agreed and acknowledged that the restrictive covenants in TNSC Japanese Distribution Agreement set forth the sole obligation of MTG and its Affiliates with respect to actions in
Japan. 
 (b) ATMI agrees that during the Non-Compete Period, ATMI will not, either on its own or through any
Affiliate, joint venture or by another entity in which ATMI has any interest whatsoever, enter into an agreement with a MTG Competitor that gives such MTG Competitor any of the rights that MTG had under the SDS Agreement or the VAC Agreement to
market or sell SDS Products or VAC Products, respectively, or otherwise permit, allow or authorize such MTG Competitor to exercise any such rights to market and sell SDS Products and VAC Products; provided, however, that, notwithstanding the
foregoing: 

  
 17 

 (i) ATMI may engage in transactions with a MTG Competitor
for reselling SDS Products or VAC Products to a customer if such MTG Competitor is providing Site Gas Management Services for such customer; 
 (ii) ATMI may enter into an agreement with a MTG Competitor that gives such MTG Competitor the right to market and sell any SDS Products and/or VAC Products in one or more countries, based on ATMI’s
inability to obtain a license or permit that is required in order to be able to sell such SDS Products and/or VAC Products in such country or countries, provided, that (A) ATMI shall notify MTG of the foregoing situation, and MTG shall
have the first right to negotiate for a period of fifteen (15) Business Days to provide such services to ATMI before ATMI enters into an agreement with a MTG Competitor for the same, and (B) ATMI’s inability to obtain such license or
permit shall not occur due to the cost or time necessary to obtain such a license or permit, except that ATMI shall have the right to license a MTG Competitor under this Section 6.2(b)(ii) temporarily during the period it takes for ATMI
to secure the license or permit as long as ATMI is diligently and expeditiously pursuing the licensing and permitting process. Additionally, if ATMI enters into an agreement with any MTG Competitor under this Section 6.2(b)(ii), such
agreement shall not give the MTG Competitor the right to offer its own or a third party’s High Pressure Products along with the SDS Products and/or VAC Products as a bundle; and 

(iii) in no event will this Section 6.2(b) be construed as imposing any obligations on ATMI
or any of its Affiliates with respect to actions in Japan, it being agreed and acknowledged that the restrictive covenants in TNSC Japanese Distribution Agreement set forth the sole obligation of ATMI and its Affiliates with respect to actions in
Japan. 
 For the avoidance of doubt, the restrictions set forth in this Section 6.2(b) shall not be broader in
scope than the rights granted to MTG under the SDS Agreement and the VAC Agreement to market and sell SDS Products and VAC Products, respectively. For example, and in illustration of the foregoing sentence, ATMI shall be free to enter into an
agreement or relationship with an MTG Competitor for the sale and distributions of SDS Products outside of the Field of Use. 

Notwithstanding anything to the contrary contained in this Agreement, the provisions of this Section 6.2(b) shall be
inapplicable and become null and void if ATMI consummates a transaction with a MTG Competitor pursuant to which such MTG Competitor becomes a successor in interest to ATMI’s business (whether by merger, acquisition, consolidation, change of
control, reorganization or sale of substantially all of ATMI’s assets to which this Agreement relates); provided, however, that if the foregoing occurs at any time during the first twelve (12) months after the Effective Date,
ATMI’s agreement with such MTG Competitor shall prohibit ATMI and such MTG Competitor from offering its own High Pressure Products along with the SDS Products and/or VAC Products as a bundle during the period that ends on the first anniversary
of the Effective Date, and MTG shall be a third party beneficiary of this contractual prohibition. 
 (c) MTG
agrees that the covenant set forth in Section 6.2(a) and ATMI agrees that the covenant set forth in Section 6.2(b) is reasonable in temporal and geographic scope and otherwise in all other respects, and has been made in order
to induce MTG and ATMI to enter into this Agreement. 

  
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 (d) In the event of a breach or violation of Section 6.2(a) by
MTG or Section 6.2(b) by ATMI, the Non-Compete Period shall be tolled as to the breaching party until such breach or violation has been duly cured. 
 6.3 Further Assurances. 
 (a) Following the consummation of
the Transactions, MTG shall, and shall cause its Affiliates to, execute and deliver such further instruments of conveyance and transfer and take such additional action as ATMI may reasonably request to effect, consummate, confirm or evidence the
Transactions, including the transfer to ATMI or its Affiliates, as the case may be, of all instruments, assignments and other documents and records which may be necessary or appropriate for conveying to ATMI or its Affiliates good and legal title
free and clear of all Liens and other Liabilities to all of the Acquired Assets (other than the Assumed Liabilities) and MTG shall, and shall cause its Affiliates to, execute such documents as may be necessary or appropriate to assist ATMI in
preserving or perfecting its rights or the rights of its Affiliates, as the case may be, in the Acquired Assets and its ability to conduct the Business after the Effective Date. 

(b) During the Non-Compete Period, MTG shall not, and shall cause its Affiliates to not, in any manner take or cause to
be taken any action which is designed or intended to discourage, or would be reasonably anticipated to have the effect of discouraging, any End Customers or BF3 Supplier from maintaining the same business relationships in connection with the
Business and the Acquired Assets after the Effective Date as were maintained in connection with the Business and the Acquired Assets prior to the Effective Date. Except as set forth in the Transition Services Agreement, MTG agrees that after the
Effective Date, it shall, and shall cause its Affiliates to, refer all customer inquiries relating to the SDS Products and VAC Products to ATMI. 
 (c) Following the consummation of the Transactions, MTG shall promptly pay or deliver to ATMI any amounts or items that may be received by MTG that constitute Acquired Assets and ATMI shall promptly pay
or deliver to MTG any amounts or items that may be received by ATMI that constitute Excluded Assets. 
 (d) ATMI
acknowledges and agrees that, as of the Effective Date, MTG and its Affiliates have no obligation to participate in or structure the operation of the Business other than as set forth in the Transition Services Agreement, the Manufacturing Agreement,
the TNSC Japanese Distribution Agreement and the TNSC Side Letter. 
 (e) Notwithstanding anything to the
contrary contained herein, nothing contained in this Agreement shall restrict MTG or its Affiliates in any manner from manufacturing, marketing, selling and/or distributing High Pressure Products to End Customers. 

6.4 Confidentiality. Following the consummation of the Transactions, MTG shall, and shall cause its Affiliates to,
maintain as confidential and shall not use or disclose (except as required pursuant to the Transition Services Agreement, the Manufacturing Agreement, by law 

  
 19 

 
or as authorized in writing by ATMI) any information or materials relating to the businesses, operations and affairs conducted with respect to the Acquired Assets (including any business plans,
practices and procedures, pricing information, sales figures, profit or loss figures, information relating to customers, clients, suppliers, sources of supply, customer lists, and other confidential information relating to the Business) that is not
already, or later becomes (through no breach by MTG of its confidentiality obligations with respect to such information), generally available to the public. In the event MTG or any of its Affiliates is required by law to disclose any such
confidential information, MTG shall promptly notify ATMI in writing, which notification shall include the nature of the legal requirement and the extent of the required disclosure, and shall cooperate with ATMI to obtain a protection order and
otherwise preserve the confidentiality of such information consistent with applicable law. Notwithstanding anything herein to the contrary, MTG may use Residuals for any purpose, including, for example, use in connection with selling products (other
than Competitive Products) to End Customers; provided that this right to use Residuals does not result in or amount to a license under any patents of ATMI. The term “Residuals” means any information retained in the unaided memories
of MTG’s employees who have had access to ATMI’s confidential information pursuant to the terms of this Agreement. An employee’s memory is unaided if the employee has not intentionally memorized the information for the purpose of
retaining and subsequently using or disclosing it to a third party. Subject to the terms and conditions of this Agreement, MTG’s employees shall not be prevented from using Residual information as part of the employees’ skill, knowledge,
talent, and/or expertise on future projects. 
 6.5 Insurance. MTG agrees not to, and shall cause its
Affiliates not to, take any action after the consummation of the Transactions to impede or impair ATMI’s rights to make a claim under any of the insurance policies maintained by MTG with respect to its properties, assets and businesses to the
extent such claim relates to Losses that arise out of any act, omission, occurrence, fact or circumstance existing or occurring prior to the consummation of the Transactions, except to the extent such Losses are attributable to third party claims
for which ATMI has an obligation to indemnify MTG pursuant to Section 5.2(b). Without limiting the rights of ATMI or MTG elsewhere in this Agreement, if any claims are made, or Losses occur prior to the consummation of the Transactions,
that relate to the Acquired Assets or the Assumed Liabilities, and claims may be made against the insurance policies maintained by MTG or its Affiliates with respect to its properties, assets and businesses, then MTG shall, and shall cause its
Affiliates to, use commercially reasonable efforts to ensure that ATMI or its respective Affiliates can file notice and otherwise continue to pursue such claims and recover proceeds under the terms of such policies and MTG agrees to, and shall cause
its Affiliates to, otherwise cooperate with ATMI or its Affiliates to make the benefits of any such insurance policies available to ATMI or their Affiliates, provided, that, subject to Article V hereof, (i) all of MTG’s and
its Affiliates’ costs and expenses incurred in connection with the foregoing are promptly paid by ATMI and (ii) such claims will be subject to (and recovery thereon will be reduced by the amount of) any applicable deductibles, retentions,
self-insurance provisions or any payment or reimbursement obligations of MTG or any of its Affiliates in respect thereof. 
 6.6 Intellectual Property License. 
 (a) MTG hereby grants
to ATMI an irrevocable, perpetual, non-exclusive, worldwide, non-transferable (except in accordance with Section 6.6(b) and Section 8.3), non- 

  
 20 

 sublicensable (except in accordance with Section 6.6(b)), royalty-free license,
under the Business Intellectual Property existing as of the Effective Date to make, use, sell, and distribute Licensed Products in the Field of Use in the same manner as MTG and its Affiliates made, used, sold and distributed the Licensed Products
in the Field of Use as of the Effective Date. 
 (b) ATMI’s license granted pursuant to
Section 6.6(a) shall not be sublicensed by ATMI without the prior written approval of MTG, which consent shall not be unreasonably withheld or delayed, except that ATMI may sublicense its license (i) to its Affiliates, and
(ii) to any vendors or service providers for the sole purpose of providing services to ATMI, and solely within the scope of the license granted pursuant to Section 6.6(a). 

(c) Except as expressly provided in this Section 6.6, no license or other right is granted by MTG or its
Affiliates by implication, estoppel or otherwise, under any patents, trade secrets, or other intellectual property rights now or hereafter owned or controlled by MTG or its Affiliates. 

(d) MTG’s sole obligation to provide information or documentation with respect to the Business Intellectual Property
will be pursuant to the Transition Services Agreement. 
 6.7 Non-Solicitation for Employment. Each of
ATMI and MTG agrees that during the two (2)-year period after the Effective Date, such party shall not, and shall cause its Affiliates to not, directly or indirectly, without the other party’s prior written consent: 

(a) solicit or attempt to solicit for employment, hire or attempt to hire, engage or attempt to engage or in any other
way induce or attempt to induce to leave the employ of or engagement by the other party or any of its Affiliates, any person who is, on the date of such solicitation or attempted solicitation, hiring or attempted hiring, or engagement or attempted
engagement, or who was, during the six (6)-month period preceding such solicitation or attempted solicitation, hiring or attempted hiring, or engagement or attempted engagement, an officer, employee or consultant to the other party or any of its
Affiliates; or 
 (b) in any other way deliberately interfere with the relationship between the other party or
its Affiliates and any such person. 
 Notwithstanding anything to the contrary contained herein, this Section 6.7
shall not prohibit or restrict either party or their respective Affiliates from (i) making general advertisements or other general solicitations of employment not specifically directed at the officers, employees or consultants of the other
party or its Affiliates or hiring any person in response thereto, (ii) soliciting for employment or hiring any person who was terminated as an officer, employee or consultant by the other party or its Affiliates, or (iii) soliciting for
employment or hiring any person whose relationship with the other party or any its Affiliate was terminated at least six (6) months prior to any such solicitation. 

  
 21 

 6.8 Gas Inventory True-Up. Within twenty (20) days after the
Effective Date, MTG shall prepare and supply to ATMI a statement (the “Trued-Up Gas Inventory Statement”) setting forth: (i) its calculation, based on a physical inventory conducted by MTG in accordance with customary
commercial practices at which ATMI’s representative may, at ATMI’s option, be present, of the amount, on a region by region basis in the Territory, of the Gas Inventory in existence as of the Effective Date, and (ii) the Inventory
Purchase Price and Manufacturing Fee with respect to such Gas Inventory (such Inventory Purchase Price. Within ten (10) days after delivery by MTG to ATMI of the Trued-Up Gas Inventory Statement, ATMI shall (i) pay to MTG the Manufacturing
Fees for the U.S. Gas Inventory and Korean Gas Inventory, and (ii) cause ATMI GmbH to pay to Matheson Tri-Gas Europe GmbH the Inventory Purchase Price for the European Gas Inventory. 

6.9 Bulk Sales Laws. MTG and ATMI each hereby waives, to the fullest extent allowable under applicable Law,
compliance with the requirements of the bulk sales or bulk transfer Laws of any jurisdiction which may be applicable to the transactions contemplated by this Agreement. 
 ARTICLE VII 
 DEFINITIONS 

For the purposes hereof, the following terms have the meanings set forth below: 

“Acquired Assets” means the Day One Acquired Assets and the Subsequently Acquired Assets. 

“Affiliate” of any particular Person means any other Person controlling, controlled by or under common
control with such particular Person, where “control” means the possession, directly or indirectly, of the power to direct the management and policies of a Person whether through the ownership of voting securities, contract or otherwise.

 “Agreement” has the meaning set forth in the preamble to this Agreement. 

“Allocation” has the meaning set forth in Section 2.6. 

“Applicable Affiliates” has the meaning set forth in Section 3.1. 

“Asian Gas Inventory” means all Gas Inventory as of the Effective Date that is located in China, Korea,
Taiwan, Singapore or Malaysia. 
 “Assignment and Assumption Agreement” means the assignment
and assumption agreement, dated as of the Effective Date, between MTG and ATMI, in the form attached hereto as Exhibit C. 
 “Assumed Contracts” means: (a) all Contracts to which MTG or any of its Affiliates is a party with End Customers (other than contracts between TNSC and End Customers located in
Japan) for the sale of Licensed Products, and (b) the BF3 Supplier Contracts (subject to Section 2.3(c)), and, in each case, all rights pursuant thereto. In the event that a Contract with an End Customer includes the End Customer
purchasing product from MTG or its Affiliates in addition 

  
 22 

 
to the Licensed Products, then only those rights and obligations specifically set forth in such Contract which specifically apply to Licensed Products shall be included as part of the definition
of Assumed Contract. For the avoidance of doubt, Assumed Contracts shall not include any Contract that has been terminated or has expired in accordance with its terms prior to the Effective Date. 

“Assumed Liabilities” means: 

(a) all Liabilities to the extent relating to or arising out of the operation of the Business by ATMI and its Affiliates
from and after the Effective Date (including, for the avoidance of doubt, all such Liabilities pertaining to: (x) the obligation to dispose of any MTG-Owned Cylinders purchased by ATMI or its Affiliates from MTG or its Affiliates hereunder, as
well as any ATMI-owned SDS2 cylinders, (y) any product warranty obligations to End Customers under Assumed Contracts relating to Licensed Products sold by MTG or its Affiliates prior to the Effective Date, and (z) the matter set forth in
Schedule 7.1), other than: 
 (i) any such Liabilities to the extent relating to or
arising out of failure by MTG or any of its Affiliates, prior to the Effective Date, to (A) comply with applicable Laws with respect to the manufacture, assembly, handling, transportation, storage or use of the Licensed Products, or
(B) follow or adhere to the standards, specifications, procedures and instructions attached hereto as Exhibit G, in each case with respect to Licensed Products manufactured by MTG or any of its Affiliates (“MTG
Non-Compliance Liabilities”); 
 (ii) any such Liabilities to the extent relating to
any failure of the Licensed Products to satisfy the product specifications attached hereto as Exhibit H that are caused by: (A) MTG’s or its Affiliates’ acts or omissions in assembling, filling or handling the cylinders used in
connection with the Licensed Products in violation of (1) any applicable Laws or (2) the manufacturing instructions and procedures set forth in the Legacy Agreements; or (B) gas supplied by MTG or its Affiliates for filling into such
cylinders, in the case of each of the foregoing clauses (A) and (B), prior to the Effective Date (“MTG Non-Performance Liabilities”); and 

(iii) any such Liabilities to the extent arising out of any Licensed Product warranty provision in any
Assumed Contract with a Low Volume End Customer as such Assumed Contract exists on the Effective Date, to the extent such Liabilities are in excess of the Liabilities to such Low Volume End Customer that ATMI or its Affiliate would have assumed
under the Licensed Product warranty provision set forth in MTG’s standard form of purchase order terms and conditions attached hereto as Exhibit K, had such standard form of purchase order terms and conditions governed such Assumed
Contract, rather than the Licensed Product warranty provision in such Assumed Contract (“MTG Warranty Liabilities”). For the avoidance of doubt, this clause (iii) shall only apply to the current term of any Assumed
Contract as of the Effective Date and not to any extension or renewal of any such term (including any automatic extensions or renewals of such Assumed Contracts where ATMI would have had the ability to opt out of or decline such extensions or
renewals), and notwithstanding anything otherwise expressed or implied herein, shall in no event be applicable for a period of more than one (1) year following the Effective Date; 

  
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 (b) any Liabilities to the extent resulting from any failure of MTG or its
applicable Affiliate to, prior to the Effective Date, obtain any consent or approval of any counterparty to any of the Assumed Contracts, in each case concerning the Transfer of the Assumed Contracts from MTG or its Affiliate to ATMI or its
Affiliate required under the terms and conditions of such Assumed Contract (“ATMI Consent Liabilities”); provided that ATMI Consent Liabilities shall not include any Liabilities resulting from a breach by MTG of its obligations
pursuant to Section 2.2(b) or (c) of this Agreement; and 
 (c) ATMI Non-Compliance
Liabilities and ATMI Non-Performance Liabilities, as such terms are herein described and defined. For purposes of clarification, “Assumed Liabilities” shall not include MTG Non-Compliance Liabilities, MTG Non-Performance Liabilities or MTG
Warranty Liabilities, all of which shall be considered “Excluded Liabilities”. 

“ATMI” has the meaning set forth in the preamble to this Agreement. 

“ATMI Assignee” has the meaning set forth in Section 8.3. 

“ATMI Indemnified Parties” has the meaning set forth in Section 5.2(a). 

“ATMI Release Parties” has the meaning set forth in Section 1.4(a). 

“ATMI Released Claims” has the meaning set forth in Section 1.4(b). 

“BF3 Supplier Contracts” means, collectively: (a) that certain Sales Agreement between MTG and
Nukem, dated as of September 1, 2009, as amended (the “Nukem BF3 Suppler Contract”), and (b) that certain Quotation between MTG and Ceradyne, dated as of January 17, 2011 (the “Ceradyne BF3 Suppler
Contract”). 
 “BF3 Suppliers” means, collectively, Nukem and Ceradyne. 

“Business” means the manufacturing, marketing, distribution, sales and other related business operations
conducted by MTG and its Affiliates pursuant to and in connection with the Legacy Agreements prior to the Effective Date. 
 “Business Day” means each day which is not a day on which banking institutions in The City of New York, New York are authorized or obligated by law or executive order to close.

 “Business Intellectual Property” means all Intellectual Property Rights owned (in whole or
in part) or held for use by MTG and its Affiliates and developed, created, reduced to practice or otherwise acquired in connection with the Business and MTG’s and its Affiliates’ performance under the Legacy Agreements, including:
(a) all Intellectual Property Rights consisting of SDS Technology, the SDS Mark, Technical Information and Improvements, including Matheson Improvements and Joint Improvements (as such capitalized terms in this subsection (a) are defined
in the SDS Agreement, including, solely for purposes of this definition, “SDS Technology”); and (b) all VAC Technology. 

  
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 “Cash Consideration” means the value of ninety-five million
U.S. dollars ($95,000,000.00), allocated in accordance with the Allocation. 
 “CEO” has the
meaning set forth in Section 8.7. 
 “CFO” has the meaning set forth in
Section 8.7. 
 “Ceradyne” means Ceradyne, Inc. 

“Challenge” has the meaning set forth in Exhibit E. 

“Claim” has the meaning set forth in Exhibit E. 

“Claim Response” has the meaning set forth in Exhibit E. 

“Claims Notice” has the meaning set forth in Exhibit E. 

“Code” means the Internal Revenue Code of 1986, as amended. 

“Competitive Product” means any product similar to or otherwise competitive with SDS Products or VAC
Products, including any product based on, incorporating or otherwise using sub-atmospheric pressure gas delivery and/or storage technology. For the avoidance of doubt, High Pressure Products shall not be deemed “Competitive Products.”

 “Contract” means any contract, agreement, lease, warranty, license, binding arrangement,
commitment or instrument, including all amendments, exhibits, schedules and similar supplements thereto. 

“Current Year Accounting Statements” means the 2011 monthly SDS sales files and 2011
quarterly SDS RDGMA files issued by Matheson to ATMI and the Final Accounting Statement.  

“Cylinder Bill of Sale” means the bill of sale for the transfer of MTG-Owned Cylinders, dated as of the
Effective Date, by and among MTG, TNSC and ATMI, in the form attached hereto as Exhibit B-1. 

“Day One Acquired Assets” has the meaning set forth in Exhibit A-1. 

“Day One Gas Inventory” means the European Gas Inventory and the U.S. Gas Inventory. 

“Dispute” has the meaning set forth in Section 8.7. 

“Distributor” means any distributor who distributes Licensed Products to third parties for or on behalf
of MTG or any of its Affiliates. 
 “Effective Date” has the meaning set forth in the preamble
to this Agreement. 

  
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 “End Customer” means any end customer who purchases
Licensed Products from MTG or its Affiliates for its own use and not for resale. 
 “European Gas
Inventory” means all Gas Inventory as of the Effective Date that is located in Europe. 

“European Gas Inventory Bill of Sale” means the bill of sale for the transfer of the European Gas
Inventory, dated as of the Effective Date, by and between Matheson Tri-Gas Europe GmbH and ATMI GmbH in the form attached hereto as Exhibit B-2. 
 “Excluded Assets” means all assets other than the Acquired Assets. 
 “Excluded Liabilities” means all Liabilities to the extent related to or arising out of the operation of the Business by MTG and its Affiliates prior to the Effective Date, other than:

 (a) any such Liabilities to the extent relating to or arising out of failure by ATMI or any of its
Affiliates, prior to the Effective Date, to (A) comply with applicable Laws with respect to the manufacture, assembly, handling, transportation, storage or use of the Licensed Products, or (B) follow or adhere to the standards,
specifications, procedures and instructions as set forth in Exhibit G, in each case with respect to Licensed Products manufactured by ATMI or its Affiliates (“ATMI Non-Compliance Liabilities”); 

(b) any such Liabilities to the extent relating to any failure of the Licensed Products to satisfy the product
specifications attached hereto as Exhibit H (including any failure caused by a defect in material and/or workmanship of the cylinders or valves) except for any such failure caused by: (i) MTG’s or its Affiliates’ acts or
omissions in assembling, filling or handling the cylinders used in connection with the Licensed Products in violation of (A) any applicable Laws or (B) the manufacturing instructions and procedures set forth in the Legacy Agreements; or
(ii) gas supplied by MTG or its Affiliates for filling into such cylinders, in the case of each of the foregoing clauses (i) and (ii), prior to the Effective Date (“ATMI Non-Performance Liabilities”);

 (c) any such Liabilities to the extent and for which MTG is entitled to indemnification from ATMI under the
surviving provisions of the Legacy Agreements set forth in Section 1.2; and 
 (d) MTG
Non-Compliance Liabilities, MTG Non-Performance Liabilities and MTG Warranty Liabilities. For purposes of clarification, “Excluded Liabilities” shall not include ATMI Non-Compliance Liabilities, ATMI Non-Performance Liabilities and ATMI
Consent Liabilities, all of which shall be considered “Assumed Liabilities”. 
 “Field of
Use” means ion implant applications, including any applications using a beamline implant tool. 

“Final Accounting Statement” means the September 2011 SDS Sales file and the 2011 Q3 SDS RDGMA file (for
the period from July 1, 2011 until the Effective Date) to be issued by Matheson to ATMI. 

  
 26 

 “Final Resolution” has the meaning set forth in Exhibit
E. 
 “Fundamental Representations” has the meaning set forth in Section 5.1.

 “Gas Inventory” means all gases contained in the Licensed Product inventory in finished form
owned by MTG, its Affiliates and its Distributors as of the Effective Date, other than the gases in any Licensed Product inventory owned by TNSC in Japan. 
 “Government Entity” means individually, and “Government Entities” means collectively, the United States of America or any other nation, any state or other political
subdivision thereof, or any entity exercising executive, legislative, judicial, regulatory or administrative functions of government, including any court, in each case having jurisdiction over MTG, the Business or the Acquired Assets. 

“High Pressure Products” means products that both store and deliver gases and/or liquids
under high pressure (e.g., store and deliver at a pressure above zero psig and/or where the storage pressure equals the delivery pressure).  
 “High Volume Assumed Contracts” means all Contracts with High Volume End Customers, which High Volume Assumed Contracts are set forth on Schedule 3.7(a). 

“High Volume End Customers” mean those End Customers representing the top eighty-five (85%) percent
of the 2010 gross sales revenue for the SDS Products, which High Volume Assumed Customers are listed on Schedule 3.7(a). 
 “Indemnitee” has the meaning set forth in Section 5.2(c)(v). 
 “Indemnitor” has the meaning set forth in Section 5.2(c)(v). 
 “Intellectual Property Rights” means all domestic and foreign intellectual property and proprietary rights including, but not limited to: (i) all inventions (whether or not
patentable or reduced to practice), all improvements thereto, and all patents, patent applications, and patent disclosures, together with all provisionals, reissuances, continuations, continuations-in-part, divisions, revisions, extensions and
reexaminations thereof; (ii) all trademarks, service marks, trade dress, logos, slogans, brand names, trade names, internet domain names and corporate names (whether or not registered), together with all translations, adaptations, derivations
and combinations thereof, and including all goodwill connected with the use thereof and symbolized thereby, and all applications, registrations, and renewals in connection therewith; (iii) all copyrights and copyrightable works (whether or not
published), and all applications, registrations and renewals in connection therewith; (iv) all trade secrets and, whether or not confidential, all business information (including ideas, research and development information, know-how, formulas,
compositions, manufacturing and production processes and techniques, technical data, designs, drawings, specifications, layouts, research records, records of inventions, test information, financial, marketing and business data, customer and supplier
lists and information, pricing and cost information, business and marketing plans and proposals); (v) all software, and all electronic data, databases and data collections; (vi) all copies and tangible embodiments of the foregoing (in
whatever form or medium); (vii) any rights in or license to or from a third Person in any of the foregoing; and (viii) any past, present or future claims or causes of actions arising out of or related to any infringement, dilution,
misappropriation or other violation of any of the foregoing. 

  
 27 

 “Inventory Purchase Price” means, with respect to any Line
Item (as defined in the Transition Services Agreement) of Gas Inventory, the purchase price to be paid for such Line Item of Gas Inventory in accordance with the calculation set forth in Exhibit I. 

“Knowledge” means, with respect to any Person, knowledge of such Person after reasonable inquiry and
investigation. As it relates to MTG, the term “Knowledge” means the actual knowledge of Kevin Finn and Volker Heilmann after reasonable inquiry made of the Presidents of each MTG Affiliate. 

“Korean Gas Inventory” means all Gas Inventory as of the Effective Date that is located in Korea.

 “Laws” means all statutes, laws, codes, ordinances, regulations, rules, orders, judgments,
writs, injunctions, assessments, awards, acts or decrees of any Government Entity. 
 “Legacy
Agreements” means, collectively, the SDS Agreement and the VAC Agreement. 

“Liability” means any liability, obligation, commitment, expense, claim, deficiency, guaranty or
endorsement (whether direct or indirect, whether known or unknown, whether asserted or unasserted, whether absolute or contingent, whether accrued or unaccrued, whether matured or unmatured, whether liquidated or unliquidated, and whether due or to
become due), including any liability for Taxes. 
 “Licensed Products” means all SDS Products
and VAC Products manufactured, marketed, sold or distributed by MTG, its Affiliates or its authorized agents pursuant to the Legacy Agreements. 
 “Lien” or “Liens” means any mortgage, pledge, security interest, encumbrance, deed of trust, right-of-way, right of setoff, claim, lien, charge of any kind (including any
conditional sale or other title retention agreement or lease in the nature thereof), easement, option, proxy, power-of-attorney, voting agreement, or any restriction on transfer. 

“Loss” or “Losses” have the meaning set forth in Section 5.2(a).

 “Low Volume End Customers” means any End Customers other than the High Volume End Customers.

 “Manufacturing Agreement” the Manufacturing Agreement dated as of the Effective Date, by and
between MTG and ATMI. 
 “Manufacturing Fee” means, with respect to any Line Item (as defined
in the Transition Services Agreement) of Gas Inventory, the fee to be paid by ATMI to MTG for the filling of such Line Item of Gas Inventory in accordance with the calculation set forth in Exhibit J. 

“MTG” has the meaning set forth in the preamble to this Agreement. 

  
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 “MTG Competitor” means any entity which sells and/or
distributes High Pressure Products that compete with High Pressure Products sold and/or distributed by MTG, which entities, as of the Effective Date, consist of those entities set forth in Exhibit F hereto; provided, that MTG may
update Exhibit F from time to time with additional MTG Competitors that meet the criteria of the foregoing definition; and provided, further, that no entity shall be deemed an MTG Competitor unless and until MTG updates
Exhibit F to reflect such entity and ATMI receives written notice by MTG thereof. Notwithstanding the foregoing, no entity with which ATMI conducts business in the Field of Use with respect to the SDS Products or VAC Products at the time MTG
updates Exhibit F to first reflect such entity as an MTG Competitor, shall, in fact, be deemed an MTG Competitor. 
 “MTG Indemnified Parties” has the meaning set forth in Section 5.2(b). 
 “MTG-Owned Cylinder” has the meaning set forth in Exhibit A-1. 
 “MTG Release Parties” has the meaning set forth in Section 1.4(a). 
 “MTG Released Claims” has the meaning set forth in Section 1.4(a). 
 “Mutual Release” has the meaning set forth in Section 1.4(c). 
 “Non-Compete Period” has the meaning set forth in Section 6.2(a). 
 “Nukem” means Nukem GmbH. 

“Person” means an individual, a partnership, a corporation, a limited liability company, an association,
a joint stock company, a trust, a joint venture, an unincorporated organization and a governmental entity or any department, agency or political subdivision thereof. 

“Proceeding” means any action, investigation, lawsuit, proceeding, investigation or hearing. 

“Residuals” has the meaning set forth in Section 6.4. 

“Response Period” has the meaning set forth in Exhibit
E                    . 
 “Sales Commission” has the meaning set forth in
Section 2.1(e)                    . 
 “SDS Agreement” means that certain License, Manufacture and Distribution Agreement by and between MTG (as successor-in-interest to Matheson Gas Products, Inc.) and ATMI dated as of
November 1, 1996, as amended by the parties thereto pursuant to (a) that certain Amendment to License, Manufacture and Distribution Agreement effective as of July 26, 2001, (b) Amendment No. 2 to License, Manufacture and
Distribution Agreement dated as of December 19, 2002, and (c) Amendment No. 3 to License, Manufacture and Distribution Agreement dated as of December 31, 2008. 

“SDS Products” means any products based on, incorporating or otherwise using SDS Technology. 

  
 29 

 “SDS RDGMA” means the related distributor gross margin
analysis report for the 2011 calendar year as described in the SDS Agreement. 
 “SDS
Technology” means a certain system for the low-pressure adsorption and storage of arsine, phosphine, boron trifluoride and other gases used or useful in the Field of Use, and any and all improvements, modifications, and enhancements
thereto. 
 “Site Gas Management Services” means providing services to a customer
pursuant to a site gas management arrangement, under which such customer’s gases requirements at a specific site or sites are subject to and managed through such arrangement. Under a Site Gas Management Services arrangement, the company
providing such services is not involved in sales/marketing activities or pricing decisions that may influence the customer receiving such Site Gas Management Services to buy or not to buy specific products from specific suppliers. After such a
buying decision has been made by the customer, the Site Gas Management Services provider’s role may include provision of such logistical and operational services as: (a) managing cylinder inventories, (b) managing inbound and outbound
cylinders, and (c) connecting and disconnecting cylinders to and from the customer’s production equipment, and similar operational services. Under such arrangement, the Site Gas Management Services provider may be the party responsible for
executing purchases from suppliers on behalf of the customer. Such involvement would not violate the definition of Site Gas Management Services herein, as long as the Site Gas Management Services provider does not have any influence over the
customer’s decision as to the source and type of gas products to be purchased. 

“Subsequent Bill of Sale” means a bill of sale between the owner of certain Subsequently Acquired Assets
and ATMI or its designated Affiliate for the transfer of such Subsequently Acquired Assets, which shall be in material and substantial conformance with the form of bill of sale attached hereto as Exhibit B-4. 

“Subsequently Acquired Assets” means those assets set forth in Exhibit A-2. 

“Subsequent Transfer” has the meaning set forth in Section 2.1(a)(ii). 

“Tax” or “Taxes” means (a) federal, state, county, local, foreign or other income,
gross receipts, ad valorem, franchise, profits, windfall profits, value-added, goods and services, sales or use, transfer, registration, excise, escheat, utility, environmental, communications, real or personal property, capital stock, license,
payroll, wage or other withholding, employment, unemployment, disability, social security (or similar), severance, stamp, occupation, alternative or add-on minimum, estimated, customs, duties, fees, assessments charges and other taxes of any kind
whatsoever, whether disputed or not, (b) all interest, penalties, fines, additions to tax or additional amounts imposed by any taxing authority and (d) any liability for any amount described in the foregoing clause (a) or (b), under
Treasury Regulation Section 1.1502-6 (or any similar provision of foreign, state or local law), as a transferee or successor, by contract or otherwise. 
 “Tax Return” means any return, declaration, report, claim for refund, estimate, information report, return statement or filing relating to Taxes, including any schedule or attachment
thereto and including any amendment thereof. 

  
 30 

 “Territory” has the meaning set forth in the Transition
Services Agreement. 
 “Third Party Claim” has the meaning set forth in Exhibit E.

 “Third Party Claims Notice” has the meaning set forth in Exhibit E. 

“TNSC” has the meaning set forth in Section 2.3(a)(i). 

“TNSC Japanese Distribution Agreement” means that certain distribution agreement dated as of the
Effective Date, by and between ATMI and TNSC. 
 “TNSC Side Letter” means that certain side
letter dated as of the Effective Date, by and among TNSC, MTG and ATMI, and attached hereto as Exhibit L. 
 “Trademark Assignment” means the instruments of assignment and transfer of MTG’s rights in and to the “SDS” name and trademark registration, in the form attached hereto as
Exhibit D. 
 “Transactions” means the transactions contemplated by this Agreement.

 “Transfer” means any sale, assignment, transfer, novation or conveyance. 

“Transition Services Agreement” the Transition Services Agreement dated as of the Effective Date, by and
between MTG and ATMI. 
 “Treasury Regulation” means the United States Treasury Regulations
promulgated under the Code, and any reference to any particular Treasury Regulation section shall be interpreted to include any final or temporary revision of or successor to that section regardless of how numbered or classified. 

“Trued-Up Gas Inventory Statement” has the meaning set forth in Section 6.8. 

“UCC-3” means the amendment filed with the Secretary of State of any state of the U.S. pursuant to the
Uniform Commercial Code as adopted by such state, terminating the effectiveness of the financing statement previously filed with respect to the security interest(s) of the secured party authorizing such amendment. 

“U.S.” means the United States of America. 

“U.S. Gas Inventory” means all Gas Inventory as of the Effective Date that is located in the United
States of America. 
 “U.S. Gas Inventory Bill of Sale” means the bill of sale for the transfer
of the U.S. Gas Inventory, dated as of the Effective Date, by and between MTG and ATMI in the form attached hereto as Exhibit B-3. 
 “VAC Agreement” means that certain Amended and Restated VAC Distribution Agreement by and between MFG and ATMI dated as of January 1, 2009, as amended by the parties thereto pursuant
to (a) that certain Amendment No. 1 to Amended and Restated VAC Distribution Agreement dated as of June 30, 2009 and (b) Amendment No. 2 to Amended and Restated VAC Distribution Agreement dated as of December 29, 2010.

  
 31 

 “VAC Products” means any products based on, incorporating
or otherwise using VAC Technology. 
 “VAC Technology” means VAC gas storage technology
developed by ATMI utilizing a pressure cylinder having regulators within the cylinder for the delivery of sub-atmospheric, low and/ or high pressure gas and any and all improvements, modifications, and enhancements thereto. 

“$” means U.S. dollars. 
 ARTICLE VIII 
 MISCELLANEOUS 

8.1 Notices. All notices, demands or other communications to be given or delivered under or by reason of the
provisions of this Agreement shall be in writing and shall be deemed to have been given when delivered personally to the recipient or when sent by facsimile (with hard copy to follow), three (3) Business Days after being sent to recipient by
U.S. First Class mail (postage prepaid), or one (1) Business Day after being sent to the recipient by reputable overnight courier service (charges prepaid). Such notices, demands and other communications shall be sent to ATMI and MTG at the
addresses indicated below or to such other address or to the attention of such other Person as the recipient party has specified by prior written notice to the sending party. All notices, demands and other communications hereunder may be given by
any other means (including telecopy or electronic mail), but shall not be deemed to have been duly given unless and until it is actually received by the intended recipient. 

MTG: 
 Matheson Tri-Gas, Inc. 
 150 Allen Road 

Basking Ridge, NJ 07920 
 Attn: General Counsel 
 Facsimile No.: (908) 991-9390

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

Kelley Drye & Warren LLP 

101 Park Avenue 
 New York, NY 10178 
 Attn: Richard Lury, Esq. 

Facsimile No.: (212) 808-7897 

ATMI: 

  
 32 

 Advanced Technology Materials, Inc. 

7 Commerce Drive 
 Danbury, CT 06810 
 Attn: Ellen T. Harmon 

Facsimile No.: (203) 797-2544 

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

Latham & Watkins LLP 
 885 Third Avenue 
 New York, NY 10022 

Attn: Howard A. Sobel, Esq. 
           Marcelo Halpern, Esq. 
 Facsimile No.: (212) 751-4864 
 8.2 Severability. If,
at the time of enforcement of this Agreement, a court of competent jurisdiction shall hold that any time, duration, scope, activity or subject stated herein is unreasonable or any provision set forth herein is otherwise illegal, invalid or
unenforceable under applicable law, the parties agree that provisions setting forth the maximum time, duration, scope, activity or subject that is legal, valid and enforceable under applicable law, or other provisions setting forth, to the extent
possible, the intent of the parties set forth herein but in a manner that is legal, valid and enforceable under applicable law, shall be substituted for the illegal, invalid and/or unenforceable provisions and that the court shall be allowed to
revise this Agreement, including adding additional provisions, so that this Agreement is legal, valid and enforceable under applicable law. If, notwithstanding the foregoing, a court of competent jurisdiction declines or is unable to take such
actions or the applicable provisions cannot be so reformed, then the illegal, invalid or unenforceable provisions shall be severed and removed from this Agreement, without affecting the legality, validity and enforceability of the remainder of this
Agreement, and the remainder of this Agreement shall be construed and enforced as if such illegal, invalid or unenforceable provision had never comprised a part hereof. 

8.3 Assignment; Successors and Assigns. No party may assign any of its rights or delegate any of its duties under
this Agreement without the consent of the other party; provided, that, without such consent but with written notice to the other party: (a) ATMI may transfer or assign all or any portion of this Agreement to (i) one or more of its
Affiliates (an “ATMI Assignee”), or (ii) any of its or any ATMI Assignee’s lenders as collateral security; provided, that no such transfer or assignment will relieve ATMI of its obligations hereunder and
(b) MTG may transfer or assign all or any portion of this Agreement to one or more of its Affiliates; provided, that no such transfer or assignment will relieve MTG of its obligations hereunder. Any assignment in violation of the
foregoing shall be null and void. Subject to the foregoing, this Agreement and all covenants and agreements contained herein and rights, interests or obligations hereunder, by or on behalf of any of the parties hereto, shall bind and inure to the
benefit of the parties hereto and their respective successors and permitted assigns of the parties hereto whether so expressed or not. 
 8.4 Entire Agreement; Amendment; Waiver. This Agreement and the agreements and documents referred to herein contain the entire agreement and understanding among the parties

  
 33 

 
hereto with respect to the subject matter hereof and supersede all prior agreements and understandings, whether written or oral, relating to such subject matter in any way. This Agreement may
only be amended in a writing, executed by MTG and ATMI, which states that it constitutes an amendment hereto and specifies the provisions hereof being amended. Any provision of this Agreement may be deemed to have been waived by a party only upon
such party having executed and delivered to the other party a written instrument which states that it constitutes a waiver hereunder and specifies the provisions hereof being waived. No course of dealing between or among the parties hereto shall be
deemed effective to modify, amend or discharge any part of this Agreement or any rights or obligations of any such party or such holder under or by reason of this Agreement. The waiver by either party of a breach by the other party of any provision
of this Agreement shall not operate or be construed as a waiver of any subsequent breach by that party. 
 8.5
Counterparts. This Agreement may be executed in counterparts (including by means of telecopied or scanned signature pages), any one of which need not contain the signatures of more than one party, but all such counterparts taken together
shall constitute one and the same agreement. 
 8.6 Descriptive Headings; Interpretation. The headings
and captions used in this Agreement are for reference purposes only and shall not affect in any way the meaning or interpretation of this Agreement. Any capitalized terms used in any Schedule or Exhibit hereto and not otherwise defined therein
shall have the meanings set forth in this Agreement. Whenever the words “include,” “includes” or “including” (or similar terms) are used in this Agreement, they are deemed to be followed by the words “without
limitation.” 
 8.7 Dispute Resolution. In the event a dispute between the parties arises out of
this Agreement or either party’s performance hereunder (a “Dispute”), the chief financial officer (the “CFO”) of each party shall work in good faith to resolve such Dispute, provided, that if the CFOs are
unable to resolve such Dispute within a period of fifteen (15) days, then each CFO shall bring the Dispute to the attention of their respective chief executive officers (each, a “CEO”), who shall attempt to resolve the Dispute
prior to filing any claim against the other party in a court of competent jurisdiction. If the CEOs are unable to resolve such Dispute within a period of thirty (30) days, then either party may submit the Dispute to a court of competent
jurisdiction, but solely in accordance with the indemnification, governing law, waiver of jury trial and jurisdiction provisions of Article V and Sections 8.8, 8.9 and 8.10. 

8.8 Governing Law. All issues and questions concerning the construction, validity, enforcement and interpretation
of this Agreement and the Schedules and Exhibits hereto shall be governed by, and construed in accordance with, the laws of the State of New York without giving effect to any choice of law or conflict of law rules or provisions (whether of the State
of New York or any other jurisdiction) that would cause the application of the laws of any jurisdiction other than the State of New York. In furtherance of the foregoing, the internal law of the State of New York shall control the interpretation and
construction of this Agreement (and all Schedules and Exhibits hereto), even though under that jurisdiction’s choice of law or conflict of law analysis, the substantive law of some other jurisdiction would ordinarily apply. 

  
 34 

 8.9 Waiver of Jury Trial. EACH OF THE PARTIES HERETO WAIVES ANY RIGHT
IT MAY HAVE TO TRIAL BY JURY IN RESPECT OF ANY LITIGATION BASED ON, ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS AGREEMENT OR ANY COURSE OF CONDUCT, COURSE OF DEALING, VERBAL OR WRITTEN STATEMENT OR ACTION OF ANY PARTY HERETO. 

8.10 Jurisdiction. Each of the parties hereto submits to the jurisdiction of any federal court sitting in New
York, in any action or proceeding arising out of or relating to this Agreement and agrees that all claims in respect of the action or proceeding may be heard and determined in any such court, provided, that if such federal court does not have
jurisdiction, then each of the parties hereto submits to the jurisdiction of any state court in New York, and each of the parties hereby expressly submits to the personal jurisdiction and venue of such courts for the purposes hereof and expressly
waives any claim of improper venue and any claim that such courts are an inconvenient forum. Each of the parties hereby irrevocably consents to the service of process of any of the aforementioned courts in any such suit, action or proceeding by the
mailing of copies thereof by registered or certified mail, postage prepaid, to its address set forth in Section 8.1. 
 8.11 No Third-Party Beneficiaries. This Agreement is for the sole benefit of the parties hereto and their permitted successors and assigns and nothing herein expressed or implied shall give or be
construed to give any person, other than the parties hereto and such permitted successors and assigns, any legal or equitable rights hereunder. 
 8.12 Schedules and Exhibits. All Schedules and Exhibits attached hereto are hereby incorporated in and made a part of this Agreement as if set forth in full herein. The inclusion of items on the
Schedules attached hereto shall not in any manner qualify or modify the classification of any item as an Excluded Asset, Acquired Asset, Excluded Liability or Assumed Liability, unless explicitly noted therein. 

8.13 Specific Performance. The parties agree that irreparable damage would occur in the event that any of the
provisions of this Agreement were not performed in accordance with their specific terms or were otherwise breached. It is accordingly agreed that the parties shall be entitled to seek an injunction or injunctions to prevent breaches of this
Agreement and to enforce specifically the terms and provisions hereof in any court of the U.S. or any state having jurisdiction without the requirement of posting a bond (and each party hereby expressly waives such requirement), this being in
addition to any other remedy to which they are entitled at law or in equity. Further, in the event either party secures, from a court of competent jurisdiction in accordance with the terms hereunder, any form of an injunction in connection with the
other party’s operation or failure to operate hereunder, such other party shall not contest such issuance and agrees to comply with such injunction accordingly. 

8.14 No Strict Construction. The parties have participated jointly in the negotiation and drafting of this
Agreement. In the event an ambiguity or question of intent or interpretation arises, this Agreement shall be construed as if drafted jointly by the parties, and no presumption or burden of proof shall arise favoring or disfavoring any party by
virtue of the authorship of any of the provisions of this Agreement 

  
 35 

 8.15 Fees and Expenses. Each party shall pay all costs and expenses
incurred by such party in connection with the negotiation, preparation and execution of this Agreement and the consummation of the Transactions, including any brokerage fees. 

8.16 Press Release and Announcements. No party will (or will allow any of its Affiliates or representatives to)
issue or cause the publication of any press release or other public announcement with respect to this Agreement or the transactions contemplated hereby, without the prior written consent of the other party hereto, not to be unreasonably withheld,
conditioned or delayed; provided, however, that nothing herein will prohibit any party from issuing or causing publication of any form of press release or other public announcement to the extent that such disclosure is, upon advice of
counsel, required by applicable Law, legal process, or stock exchange listing requirements, as long as the disclosing party provides reasonable advance notice of such requirement to the other party. Each party agrees that it shall not make any
disclosure to any third party with respect to this Agreement or the transactions contemplated hereby that is inconsistent with the procedure set forth in this Section 8.16. 

*        *        *      
  * 

  
 36 

 IN WITNESS WHEREOF, the parties hereto have executed this Agreement on the
date first written above. 
  

							
		 		 	 ATMI:
  

ADVANCED TECHNOLOGY MATERIALS, INC.

				
		 		 	By:	 	 /s/ Douglas Neugold

		 		 		 	Name: Douglas Neugold
		 		 		 	Title: Chairman, CEO & President
		 		 		 	
		 		 	 MTG:
  

MATHESON TRI-GAS, INC.

				
		 		 	By:	 	 /s/ William Kroll

		 		 		 	Name: William Kroll
		 		 		 	Title: Chairman & Chief Executive Officer

  

 Exhibit A-1 

Day One Acquired Assets 
 “Day One Acquired Assets” means: 
  

	 	1.	 the Day One Gas Inventory; 

  

	 	2.	 all SDS-2 cylinders owned by MTG and its Affiliates and used in connection with Licensed Products, including those in the possession of third
parties to the extent legal title thereto remains with MTG or its Affiliates (the “MTG-Owned Cylinders”); 

  

	 	3.	 all of MTG’s right, title and interest in and to the names “SDS” and “Safe Delivery Source,” including the United States
trademark registration numbers: 2205571, 3445321 and 3474537, and Japan trademark registration number 4785109, and all common law rights that exist relating thereto; 

 

	 	4.	 all Assumed Contracts; 

  

	 	5.	 all rights, claims, credits, causes of action or rights of set off against third parties, remedies and benefits of MTG and its Affiliates arising
under or relating to the MTG-Owned Cylinders, the Assumed Contracts or the Assumed Liabilities, including rights under vendors’ and manufacturers’ warranties, indemnities and guaranties; and 

 

	 	6.	 any claim, counterclaims, setoffs, rights of recoupment, equity rights or defenses that MTG or its Affiliates may have with respect to any of the
Acquired Assets or Assumed Liabilities. 

 Exhibit A-2 

Subsequently Acquired Assets 
  

	 	•	 	 All Asian Gas Inventory existing as of the date such Asian Gas Inventory is transferred to ATMI or its designated Affiliate pursuant to
Section 2.1(a)(ii). 

 Exhibit B-1 

FORM OF 
 CYLINDER BILL OF SALE 
 This CYLINDER BILL OF
SALE (this “Cylinder Bill of Sale”) is made as of [            ] by and among Matheson Tri-Gas, Inc., corporation organized and existing under the laws of the State of
Delaware (“MTG”) and Taiyo Nippon Sanso Corporation, a corporation organized and existing under the laws of Japan (“TNSC”, and, together with MTG, “Sellers”), and Advanced Technology Materials,
Inc., corporation organized and existing under the laws of the State of Delaware, on the other hand (“Buyer”). 
 WHEREAS, MTG and Buyer have entered into a Termination Agreement, dated as of the date hereof (the “Termination Agreement”), pursuant to which, among other things, the parties have
terminated the SDS Agreement and VAC Agreement, and Buyer has purchased certain assets and assumed certain liabilities of MTG relating to the Business, in each case on the terms and conditions set forth therein; and 

WHEREAS, pursuant to the Termination Agreement, MTG, on behalf of itself and its Affiliate, TNSC, has agreed to
sell, convey, transfer, assign and deliver to Buyer all of the MTG-Owned Cylinders (the “Cylinders”), and Buyer has agreed to purchase the Cylinders from Sellers, in each case on the terms and conditions set forth therein.

 NOW THEREFORE, for good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, and intending to be legally bound hereby, it is hereby agreed that: 
 1. Definitions.
Unless otherwise defined herein, all capitalized terms used in this Cylinder Bill of Sale shall have the meanings set forth in the Termination Agreement. 
 2. Transfer of Assets. Effective as of the Effective Date, Sellers hereby sell, convey, transfer, assign and deliver to Buyer all of their right, title and interest in, to and under the Cylinders,
and Buyer hereby purchases such Cylinders and accepts such conveyance, transfer, assignment and delivery, in each case pursuant to, and on the terms and conditions set forth in, the Termination Agreement. 

3. Subject to the Termination Agreement. This Cylinder Bill of Sale is being executed and delivered pursuant to,
and is subject in all respects to the terms and conditions of, the Termination Agreement and all of the representations, warranties, covenants and agreements of MTG and Buyer contained therein, all of which shall survive the execution and delivery
of this Cylinder Bill of Sale in accordance with the terms and conditions of the Termination Agreement. The Cylinders are being delivered for good and valuable consideration, pursuant to the terms and conditions contained in the Termination
Agreement. Nothing contained in this Cylinder Bill of Sale shall supersede, amend, alter, waive or modify (nor shall it be deemed or construed to supersede, amend, alter, waive or modify) any of the terms or conditions of the Termination Agreement
in any manner whatsoever. In no event shall this Cylinder Bill of Sale be deemed or construed as creating any rights or obligations of MTG or Buyer that are in any way in addition to, or otherwise different from, those set forth in the Termination
Agreement. In the event of any conflict between the provisions of this Cylinder Bill of Sale and the provisions of the Termination Agreement, the provisions of the Termination Agreement shall control and prevail. 

 4. Successors and Assigns. No party may assign this Cylinder Bill of
Sale without the consent of the other party; provided, that, without such consent but with written notice to the other party: (a) Buyer may transfer or assign this Cylinder Bill of Sale to (i) one or more of its Affiliates (an
“Buyer Assignee”), or (ii) any of its or Buyer Assignee’s lenders as collateral security; provided, that no such transfer or assignment will relieve Buyer of its obligations hereunder and (b) Sellers may
transfer or assign this Cylinder Bill of Sale to one or more of their Affiliates; provided, that no such transfer or assignment will relieve Sellers of their obligations hereunder. Any assignment in violation of the foregoing shall be null
and void. Subject to the foregoing, this Cylinder Bill of Sale and all covenants and agreements contained herein and rights, interests or obligations hereunder, by or on behalf of any of the parties hereto, shall bind and inure to the benefit of the
parties hereto and their respective successors and permitted assigns of the parties hereto whether so expressed or not. For the avoidance of doubt, this Section 4 applies solely to assignment of this Cylinder Bill of Sale; it does not
apply to any assignment or other transfer of any of the Acquired Assets. 
 5. Counterparts. This
Cylinder Bill of Sale may be executed in counterparts (including by means of telecopied or scanned signature pages), any one of which need not contain the signatures of more than one party, but all such counterparts taken together shall constitute
one and the same agreement. 
 6. Amendments; Waiver. This Cylinder Bill of Sale may only be amended in a
writing, executed by MTG, TNSC and Buyer, which states that it constitutes an amendment hereto and specifies the provisions hereof being amended. Any provision of this Cylinder Bill of Sale may be deemed to have been waived by a party only upon such
party having executed and delivered to the other party a written instrument which states that it constitutes a waiver hereunder and specifies the provisions hereof being waived. No course of dealing between or among the parties hereto shall be
deemed effective to modify, amend or discharge any part of this Cylinder Bill of Sale or any rights or obligations of any such party or such holder under or by reason of this Cylinder Bill of Sale. The waiver by either party of a breach by the other
party of any provision of this Cylinder Bill of Sale shall not operate or be construed as a waiver of any subsequent breach by that party 
 7. Severability. Whenever possible, each provision of this Cylinder Bill of Sale shall be interpreted in such manner as to be effective and valid under applicable law, but if any provision of this
Cylinder Bill of Sale or the application of any such provision to any party or circumstance shall be held to be prohibited by, illegal or unenforceable under applicable law, such provision shall be ineffective only to the extent of such prohibition,
illegality or unenforceability, without invalidating the remainder of such provision or the remaining provisions of this Cylinder Bill of Sale. Further, the parties agree to replace a prohibited, illegal or unenforceable provision with a permitted,
legal and enforceable provision which most closely approximates the intent and effect of the prohibited, illegal or unenforceable provision. 
 8. Governing Law; Jurisdiction. 
 (a) All issues and
questions concerning the construction, validity, enforcement and interpretation of this Cylinder Bill of Sale shall be governed by, and construed in accordance with, the laws of the State of New York without giving effect to any choice of law or
conflict of law rules or provisions (whether of the State of New York or any other jurisdiction) that would 

 
cause the application of the laws of any jurisdiction other than the State of New York. In furtherance of the foregoing, the internal law of the State of New York shall control the interpretation
and construction of this Cylinder Bill of Sale, even though under that jurisdiction’s choice of law or conflict of law analysis, the substantive law of some other jurisdiction would ordinarily apply. 

(b) EACH OF THE PARTIES HERETO WAIVES ANY RIGHT IT MAY HAVE TO TRIAL BY JURY IN RESPECT OF ANY LITIGATION BASED ON,
ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS CYLINDER BILL OF SALE OR ANY COURSE OF CONDUCT, COURSE OF DEALING, VERBAL OR WRITTEN STATEMENT OR ACTION OF ANY PARTY HERETO. 

(c) Each of the parties hereto submits to the jurisdiction of any federal court sitting in New York, in any action or
proceeding arising out of or relating to this Cylinder Bill of Sale and agrees that all claims in respect of the action or proceeding may be heard and determined in any such court; provided, that if such federal court does not have jurisdiction,
then each of the parties hereto submits to the jurisdiction of any state court in New York, and each of the parties hereby expressly submits to the personal jurisdiction and venue of such court for the purposes hereof and expressly waives any claim
of improper venue and any claim that such courts are an inconvenient forum. Each of the parties hereby irrevocably consent to the service of process of any of the aforementioned courts in any such suit, action or proceeding by the mailing of copies
thereof by registered or certified mail, postage prepaid, to its address set forth in the Termination Agreement. 

 Exhibit B-2 

FORM OF 
 EUROPEAN GAS INVENTORY BILL OF SALE 
 This
EUROPEAN GAS INVENTORY BILL OF SALE (this “European Gas Inventory Bill of Sale”) is made as of [            ] by and between and Matheson Tri-Gas Europe GmbH, a company
organized and existing under the laws of Germany (“Seller”), and ATMI GmbH, a company organized and existing under the laws of Germany (“Buyer”). 

WHEREAS, Seller is an Affiliate of Matheson Tri-Gas, Inc. (“MTG”) and Buyer is an Affiliate of
Advanced Technology Materials, Inc. (“ATMI”); 
 WHEREAS, MTG and ATMI have entered into
a Termination Agreement, dated as of the date hereof (the “Termination Agreement”), pursuant to which, among other things, the parties have terminated the SDS Agreement and VAC Agreement, and ATMI has purchased certain assets and
assumed certain liabilities of MTG relating to the Business, in each case on the terms and conditions set forth therein; and 
 WHEREAS, pursuant to the Termination Agreement, MTG, on behalf of itself and its Affiliates, has agreed to sell, convey, transfer, assign and deliver to Buyer all of the European Gas Inventory, and
ATMI, on behalf of itself and its Affiliates, has agreed to purchase the European Gas Inventory from Seller, in each case on the terms and conditions set forth therein. 

NOW THEREFORE, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged,
and intending to be legally bound hereby, it is hereby agreed that: 
 1. Definitions. Unless otherwise
defined herein, all capitalized terms used in this European Gas Inventory Bill of Sale shall have the meanings set forth in the Termination Agreement. 
 2. Transfer of Assets. Effective as of the Effective Date, Seller hereby sells, conveys, transfers, assigns and delivers to Buyer all of its right, title and interest in, to and under the European
Gas Inventory, and Buyer hereby purchases such European Gas Inventory and accepts such conveyance, transfer, assignment and delivery, in each case pursuant to, and on the terms and conditions set forth in, the Termination Agreement. 

3. Subject to the Termination Agreement. This European Gas Inventory Bill of Sale is being executed and delivered
pursuant to, and is subject in all respects to the terms and conditions of, the Termination Agreement and all of the representations, warranties, covenants and agreements of MTG and ATMI contained therein, all of which shall survive the execution
and delivery of this European Gas Inventory Bill of Sale in accordance with the terms and conditions of the Termination Agreement. The European Gas Inventory is being delivered for good and valuable consideration, pursuant to the terms and
conditions contained in the Termination Agreement. Nothing contained in this European Gas Inventory Bill of Sale shall supersede, amend, alter, waive or modify (nor shall it be deemed or construed to supersede, amend, alter, waive or modify) any of
the terms or conditions of the Termination Agreement in any manner whatsoever. In no event shall this European Gas Inventory Bill of Sale be deemed 

 
or construed as creating any rights or obligations of MTG or Buyer that are in any way in addition to, or otherwise different from, those set forth in the Termination Agreement. In the event of
any conflict between the provisions of this European Gas Inventory Bill of Sale and the provisions of the Termination Agreement, the provisions of the Termination Agreement shall control and prevail. 

4. Successors and Assigns. No party may assign this European Gas Inventory Bill of Sale without the consent of the
other party; provided, that, without such consent but with written notice to the other party: (a) Buyer may transfer or assign this European Gas Inventory Bill of Sale to (i) one or more of its Affiliates (an “Buyer
Assignee”), or (ii) any of its or Buyer Assignee’s lenders as collateral security; provided, that no such transfer or assignment will relieve Buyer of its obligations hereunder and (b) Seller may transfer or assign
this European Gas Inventory Bill of Sale to one or more of its Affiliates; provided, that no such transfer or assignment will relieve Seller of its obligations hereunder. Any assignment in violation of the foregoing shall be null and void.
Subject to the foregoing, this European Gas Inventory Bill of Sale and all covenants and agreements contained herein and rights, interests or obligations hereunder, by or on behalf of any of the parties hereto, shall bind and inure to the benefit of
the parties hereto and their respective successors and permitted assigns of the parties hereto whether so expressed or not. For the avoidance of doubt, this Section 4 applies solely to assignment of this European Gas Inventory Bill of
Sale; it does not apply to any assignment or other transfer of any of the Acquired Assets. 
 5.
Counterparts. This European Gas Inventory Bill of Sale may be executed in counterparts (including by means of telecopied or scanned signature pages), any one of which need not contain the signatures of more than one party, but all such
counterparts taken together shall constitute one and the same agreement. 
 6. Amendments; Waiver. This
European Gas Inventory Bill of Sale may only be amended in a writing, executed by Seller and Buyer, which states that it constitutes an amendment hereto and specifies the provisions hereof being amended. Any provision of this European Gas Inventory
Bill of Sale may be deemed to have been waived by a party only upon such party having executed and delivered to the other party a written instrument which states that it constitutes a waiver hereunder and specifies the provisions hereof being
waived. No course of dealing between or among the parties hereto shall be deemed effective to modify, amend or discharge any part of this European Gas Inventory Bill of Sale or any rights or obligations of any such party or such holder under or by
reason of this European Gas Inventory Bill of Sale. The waiver by either party of a breach by the other party of any provision of this European Gas Inventory Bill of Sale shall not operate or be construed as a waiver of any subsequent breach by that
party 
 7. Severability. Whenever possible, each provision of this European Gas Inventory Bill of Sale
shall be interpreted in such manner as to be effective and valid under applicable law, but if any provision of this European Gas Inventory Bill of Sale or the application of any such provision to any party or circumstance shall be held to be
prohibited by, illegal or unenforceable under applicable law, such provision shall be ineffective only to the extent of such prohibition, illegality or unenforceability, without invalidating the remainder of such provision or the remaining
provisions of this European Gas Inventory Bill of Sale. Further, the parties agree to replace a prohibited, illegal or unenforceable provision with a permitted, legal and enforceable provision which most closely approximates the intent and effect of
the prohibited, illegal or unenforceable provision. 

 8. Governing Law; Jurisdiction. 

(a) All issues and questions concerning the construction, validity, enforcement and interpretation of this European Gas
Inventory Bill of Sale and the Schedule hereto shall be governed by, and construed in accordance with, the laws of the State of New York without giving effect to any choice of law or conflict of law rules or provisions (whether of the State of New
York or any other jurisdiction) that would cause the application of the laws of any jurisdiction other than the State of New York. In furtherance of the foregoing, the internal law of the State of New York shall control the interpretation and
construction of this European Gas Inventory Bill of Sale (and the Schedule hereto), even though under that jurisdiction’s choice of law or conflict of law analysis, the substantive law of some other jurisdiction would ordinarily apply.

 (b) EACH OF THE PARTIES HERETO WAIVES ANY RIGHT IT MAY HAVE TO TRIAL BY JURY IN RESPECT OF ANY LITIGATION
BASED ON, ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS EUROPEAN GAS INVENTORY BILL OF SALE OR ANY COURSE OF CONDUCT, COURSE OF DEALING, VERBAL OR WRITTEN STATEMENT OR ACTION OF ANY PARTY HERETO. 

(c) Each of the parties hereto submits to the jurisdiction of any federal court sitting in New York, in any action or
proceeding arising out of or relating to this European Gas Inventory Bill of Sale and agrees that all claims in respect of the action or proceeding may be heard and determined in any such court; provided, that if such federal court does not have
jurisdiction, then each of the parties hereto submits to the jurisdiction of any state court in New York, and each of the parties hereby expressly submits to the personal jurisdiction and venue of such court for the purposes hereof and expressly
waives any claim of improper venue and any claim that such courts are an inconvenient forum. Each of the parties hereby irrevocably consent to the service of process of any of the aforementioned courts in any such suit, action or proceeding by the
mailing of copies thereof by registered or certified mail, postage prepaid, to its address set forth in the Termination Agreement. 

 Exhibit B-3 

FORM OF 
 U.S. GAS INVENTORY BILL OF SALE 
 This U.S. GAS
INVENTORY BILL OF SALE (this “U.S. Gas Inventory Bill of Sale”) is made as of [                    ] by and between Matheson
Tri-Gas, Inc., corporation organized and existing under the laws of the State of Delaware (“MTG”), and Advanced Technology Materials, Inc., corporation organized and existing under the laws of the State of Delaware, on the other
hand (“ATMI”). 
 WHEREAS, MTG and ATMI have entered into a Termination Agreement, dated
as of the date hereof (the “Termination Agreement”), pursuant to which, among other things, the parties have terminated the SDS Agreement and VAC Agreement, and ATMI has purchased certain assets and assumed certain liabilities of
MTG relating to the Business, in each case on the terms and conditions set forth therein; and 
 WHEREAS,
pursuant to the Termination Agreement, MTG has agreed to sell, convey, transfer, assign and deliver to ATMI all of the U.S. Gas Inventory, and ATMI has agreed to purchase the U.S. Gas Inventory from MTG, in each case on the terms and conditions set
forth therein. 
 NOW THEREFORE, for good and valuable consideration, the receipt and sufficiency of
which are hereby acknowledged, and intending to be legally bound hereby, it is hereby agreed that: 
 1.
Definitions. Unless otherwise defined herein, all capitalized terms used in this U.S. Gas Inventory Bill of Sale shall have the meanings set forth in the Termination Agreement. 

2. Transfer of Assets. Effective as of the Effective Date, MTG hereby sells, conveys, transfers, assigns and
delivers to ATMI all of its right, title and interest in, to and under the U.S. Gas Inventory, and ATMI hereby purchases such U.S. Gas Inventory and accepts such conveyance, transfer, assignment and delivery, in each case pursuant to, and on the
terms and conditions set forth in, the Termination Agreement. 
 3. Subject to the Termination Agreement.
This U.S. Gas Inventory Bill of Sale is being executed and delivered pursuant to, and is subject in all respects to the terms and conditions of, the Termination Agreement and all of the representations, warranties, covenants and agreements of MTG
and ATMI contained therein, all of which shall survive the execution and delivery of this U.S. Gas Inventory Bill of Sale in accordance with the terms and conditions of the Termination Agreement. The U.S. Gas Inventory is being delivered for good
and valuable consideration, pursuant to the terms and conditions contained in the Termination Agreement. Nothing contained in this U.S. Gas Inventory Bill of Sale shall supersede, amend, alter, waive or modify (nor shall it be deemed or construed to
supersede, amend, alter, waive or modify) any of the terms or conditions of the Termination Agreement in any manner whatsoever. In no event shall this U.S. Gas Inventory Bill of Sale be deemed or construed as creating any rights or obligations of
MTG or ATMI that are in any way in addition to, or otherwise different from, those set forth in the Termination Agreement. In the event of any conflict between the provisions of this U.S. Gas Inventory Bill of Sale and the provisions of the
Termination Agreement, the provisions of the Termination Agreement shall control and prevail. 

 4. Successors and Assigns. No party may assign this U.S. Gas
Inventory Bill of Sale without the consent of the other party; provided, that, without such consent but with written notice to the other party: (a) ATMI may transfer or assign this U.S. Gas Inventory Bill of Sale to (i) one or more
of its Affiliates (an “ATMI Assignee”), or (ii) any of its or ATMI Assignee’s lenders as collateral security; provided, that no such transfer or assignment will relieve ATMI of its obligations hereunder and
(b) MTG may transfer or assign this U.S. Gas Inventory Bill of Sale to one or more of its Affiliates; provided, that no such transfer or assignment will relieve MTG of its obligations hereunder. Any assignment in violation of the
foregoing shall be null and void. Subject to the foregoing, this U.S. Gas Inventory Bill of Sale and all covenants and agreements contained herein and rights, interests or obligations hereunder, by or on behalf of any of the parties hereto, shall
bind and inure to the benefit of the parties hereto and their respective successors and permitted assigns of the parties hereto whether so expressed or not. For the avoidance of doubt, this Section 4 applies solely to assignment of this
U.S. Gas Inventory Bill of Sale; it does not apply to any assignment or other transfer of any of the Acquired Assets. 
 5. Counterparts. This U.S. Gas Inventory Bill of Sale may be executed in counterparts (including by means of telecopied or scanned signature pages), any one of which need not contain the signatures
of more than one party, but all such counterparts taken together shall constitute one and the same agreement. 

6. Amendments; Waiver. This U.S. Gas Inventory Bill of Sale may only be amended in a writing, executed by MTG and
ATMI, which states that it constitutes an amendment hereto and specifies the provisions hereof being amended. Any provision of this U.S. Gas Inventory Bill of Sale may be deemed to have been waived by a party only upon such party having executed and
delivered to the other party a written instrument which states that it constitutes a waiver hereunder and specifies the provisions hereof being waived. No course of dealing between or among the parties hereto shall be deemed effective to modify,
amend or discharge any part of this U.S. Gas Inventory Bill of Sale or any rights or obligations of any such party or such holder under or by reason of this U.S. Gas Inventory Bill of Sale. The waiver by either party of a breach by the other party
of any provision of this U.S. Gas Inventory Bill of Sale shall not operate or be construed as a waiver of any subsequent breach by that party 
 7. Severability. Whenever possible, each provision of this U.S. Gas Inventory Bill of Sale shall be interpreted in such manner as to be effective and valid under applicable law, but if any
provision of this U.S. Gas Inventory Bill of Sale or the application of any such provision to any party or circumstance shall be held to be prohibited by, illegal or unenforceable under applicable law, such provision shall be ineffective only to the
extent of such prohibition, illegality or unenforceability, without invalidating the remainder of such provision or the remaining provisions of this U.S. Gas Inventory Bill of Sale. Further, the parties agree to replace a prohibited, illegal or
unenforceable provision with a permitted, legal and enforceable provision which most closely approximates the intent and effect of the prohibited, illegal or unenforceable provision. 

8. Governing Law; Jurisdiction. 

(a) All issues and questions concerning the construction, validity, enforcement and interpretation of this U.S. Gas
Inventory Bill of Sale shall be governed by, and construed in 

 
accordance with, the laws of the State of New York without giving effect to any choice of law or conflict of law rules or provisions (whether of the State of New York or any other jurisdiction)
that would cause the application of the laws of any jurisdiction other than the State of New York. In furtherance of the foregoing, the internal law of the State of New York shall control the interpretation and construction of this U.S. Gas
Inventory Bill of Sale, even though under that jurisdiction’s choice of law or conflict of law analysis, the substantive law of some other jurisdiction would ordinarily apply. 

(b) EACH OF THE PARTIES HERETO WAIVES ANY RIGHT IT MAY HAVE TO TRIAL BY JURY IN RESPECT OF ANY LITIGATION BASED ON,
ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS U.S. GAS INVENTORY BILL OF SALE OR ANY COURSE OF CONDUCT, COURSE OF DEALING, VERBAL OR WRITTEN STATEMENT OR ACTION OF ANY PARTY HERETO. 

(c) Each of the parties hereto submits to the jurisdiction of any federal court sitting in New York, in any action or
proceeding arising out of or relating to this U.S. Gas Inventory Bill of Sale and agrees that all claims in respect of the action or proceeding may be heard and determined in any such court; provided, that if such federal court does not have
jurisdiction, then each of the parties hereto submits to the jurisdiction of any state court in New York, and each of the parties hereby expressly submits to the personal jurisdiction and venue of such court for the purposes hereof and expressly
waives any claim of improper venue and any claim that such courts are an inconvenient forum. Each of the parties hereby irrevocably consent to the service of process of any of the aforementioned courts in any such suit, action or proceeding by the
mailing of copies thereof by registered or certified mail, postage prepaid, to its address set forth in the Termination Agreement. 

 Exhibit B-4 

FORM OF 
 SUBSEQUENT BILL OF SALE 
 This SUBSEQUENT BILL OF
SALE (this “Subsequent Bill of Sale”) is made as of [            ] by and between and [            ], a
company organized and existing under the laws of [            ] (“Seller”), and [            ], a company
organized and existing under the laws of [            ] (“Buyer”). 
 WHEREAS, Seller is an Affiliate of Matheson Tri-Gas, Inc. (“MTG”) and Buyer is an Affiliate of Advanced Technology Materials, Inc. (“ATMI”); 

WHEREAS, MTG and ATMI have entered into a Termination Agreement, dated as of the date hereof (the
“Termination Agreement”), pursuant to which, among other things, the parties have terminated the SDS Agreement and VAC Agreement, and ATMI has purchased certain assets and assumed certain liabilities of MTG relating to the Business,
in each case on the terms and conditions set forth therein; and 
 WHEREAS, pursuant to the Termination
Agreement, MTG, on behalf of itself and its Affiliates, has agreed to sell, convey, transfer, assign and deliver to Buyer all of the Subsequently Acquired Assets, and ATMI, on behalf of itself and its Affiliates, has agreed to purchase the
Subsequently Acquired Assets from Seller, in each case on the terms and conditions set forth therein. 
 NOW
THEREFORE, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, and intending to be legally bound hereby, it is hereby agreed that: 

1. Definitions. Unless otherwise defined herein, all capitalized terms used in this Subsequent Bill of Sale shall
have the meanings set forth in the Termination Agreement. 
 2. Transfer of Assets. Effective as of the
Effective Date, Seller hereby sells, conveys, transfers, assigns and delivers to Buyer all of its right, title and interest in, to and under the Subsequently Acquired Assets set forth on Schedule A hereto (the “Scheduled
Assets”), and Buyer hereby purchases such Scheduled Assets and accepts such conveyance, transfer, assignment and delivery, in each case pursuant to, and on the terms and conditions set forth in, the Termination Agreement. 

3. Subject to the Termination Agreement. This Subsequent Bill of Sale is being executed and delivered pursuant to,
and is subject in all respects to the terms and conditions of the Termination Agreement, and all of the representations, warranties, covenants and agreements of MTG and ATMI contained therein, all of which shall survive the execution and delivery of
this Subsequent Bill of Sale in accordance with the terms and conditions of the Termination Agreement. The Scheduled Assets are being delivered for good and valuable consideration, pursuant to the terms and conditions contained in the Termination
Agreement. Nothing 

 
contained in this Subsequent Bill of Sale shall supersede, amend, alter, waive or modify (nor shall it be deemed or construed to supersede, amend, alter, waive or modify) any of the terms or
conditions of the Termination Agreement in any manner whatsoever. In no event shall this Subsequent Bill of Sale be deemed or construed as creating any rights or obligations of MTG or ATMI that are in any way in addition to, or otherwise different
from, those set forth in the Termination Agreement. In the event of any conflict between the provisions of this Subsequent Bill of Sale and the provisions of the Termination Agreement, the provisions of the Termination Agreement shall control and
prevail. 
 4. Successors and Assigns. No party may assign this Subsequent Bill of Sale without the
consent of the other party; provided, that, without such consent but with written notice to the other party: (a) Buyer may transfer or assign this Subsequent Bill of Sale to (i) one or more of its Affiliates (an “Buyer
Assignee”), or (ii) any of its or Buyer Assignee’s lenders as collateral security; provided, that no such transfer or assignment will relieve Buyer of its obligations hereunder and (b) Seller may transfer or assign
this Subsequent Bill of Sale to one or more of its Affiliates; provided, that no such transfer or assignment will relieve Seller of its obligations hereunder. Any assignment in violation of the foregoing shall be null and void. Subject to the
foregoing, this Subsequent Bill of Sale and all covenants and agreements contained herein and rights, interests or obligations hereunder, by or on behalf of any of the parties hereto, shall bind and inure to the benefit of the parties hereto and
their respective successors and permitted assigns of the parties hereto whether so expressed or not. For the avoidance of doubt, this Section 4 applies solely to assignment of this Subsequent Bill of Sale; it does not apply to any
assignment or other transfer of any of the Acquired Assets. 
 5. Counterparts. This Subsequent Bill of
Sale may be executed in counterparts (including by means of telecopied or scanned signature pages), any one of which need not contain the signatures of more than one party, but all such counterparts taken together shall constitute one and the same
agreement. 
 6. Amendments; Waiver. This Subsequent Bill of Sale may only be amended in a writing,
executed by Seller and Buyer, which states that it constitutes an amendment hereto and specifies the provisions hereof being amended. Any provision of this Subsequent Bill of Sale may be deemed to have been waived by a party only upon such party
having executed and delivered to the other party a written instrument which states that it constitutes a waiver hereunder and specifies the provisions hereof being waived. No course of dealing between or among the parties hereto shall be deemed
effective to modify, amend or discharge any part of this Subsequent Bill of Sale or any rights or obligations of any such party or such holder under or by reason of this Subsequent Bill of Sale. The waiver by either party of a breach by the other
party of any provision of this Subsequent Bill of Sale shall not operate or be construed as a waiver of any subsequent breach by that party 
 7. Severability. Whenever possible, each provision of this Subsequent Bill of Sale shall be interpreted in such manner as to be effective and valid under applicable law, but if any provision of
this Subsequent Bill of Sale or the application of any such provision to any party or circumstance shall be held to be prohibited by, illegal or unenforceable under applicable law, such provision shall be ineffective only to the extent of such
prohibition, illegality or unenforceability, without invalidating the remainder of such provision or the remaining 

 
provisions of this Subsequent Bill of Sale. Further, the parties agree to replace a prohibited, illegal or unenforceable provision with a permitted, legal and enforceable provision which most
closely approximates the intent and effect of the prohibited, illegal or unenforceable provision. 
 8.
Governing Law; Jurisdiction. 
 (a) All issues and questions concerning the construction, validity,
enforcement and interpretation of this Subsequent Bill of Sale and the Schedule hereto shall be governed by, and construed in accordance with, the laws of the State of New York without giving effect to any choice of law or conflict of law rules or
provisions (whether of the State of New York or any other jurisdiction) that would cause the application of the laws of any jurisdiction other than the State of New York. In furtherance of the foregoing, the internal law of the State of New York
shall control the interpretation and construction of this Subsequent Bill of Sale and the Schedule hereto, even though under that jurisdiction’s choice of law or conflict of law analysis, the substantive law of some other jurisdiction would
ordinarily apply. 
 (b) EACH OF THE PARTIES HERETO WAIVES ANY RIGHT IT MAY HAVE TO TRIAL BY JURY IN RESPECT OF
ANY LITIGATION BASED ON, ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS SUBSEQUENT BILL OF SALE OR ANY COURSE OF CONDUCT, COURSE OF DEALING, VERBAL OR WRITTEN STATEMENT OR ACTION OF ANY PARTY HERETO. 

(c) Each of the parties hereto submits to the jurisdiction of any federal court sitting in New York, in any action or
proceeding arising out of or relating to this Subsequent Bill of Sale and agrees that all claims in respect of the action or proceeding may be heard and determined in any such court; provided, that if such federal court does not have jurisdiction,
then each of the parties hereto submits to the jurisdiction of any state court in New York, and each of the parties hereby expressly submits to the personal jurisdiction and venue of such court for the purposes hereof and expressly waives any claim
of improper venue and any claim that such courts are an inconvenient forum. Each of the parties hereby irrevocably consent to the service of process of any of the aforementioned courts in any such suit, action or proceeding by the mailing of copies
thereof by registered or certified mail, postage prepaid, to its address set forth in the Termination Agreement. 
 SIGNATURE
PAGE FOLLOWS 

 SCHEDULE A 

SCHEDULED ASSETS 

 Exhibit C 
 FORM OF 
 ASSIGNMENT AND ASSUMPTION AGREEMENT

 This ASSIGNMENT AND ASSUMPTION AGREEMENT (this “Assignment and Assumption
Agreement”) is made as of [            ] by and between and Matheson Tri-Gas, Inc., a Delaware corporation, on behalf of itself and its Affiliates (“MTG”), and
Advanced Technology Materials, Inc., a Delaware corporation (“ATMI”). 
 WHEREAS, MTG
and ATMI have entered into a Termination Agreement, dated as of the date hereof (the “Termination Agreement”), pursuant to which, among other things, the parties have terminated the SDS Agreement and VAC Agreement, and ATMI has
purchased certain assets and assumed certain liabilities of MTG relating to the Business, in each case on the terms and conditions set forth therein; and 
 WHEREAS, pursuant to the Termination Agreement, MTG, on behalf of itself and its Affiliates, has agreed to sell, convey, transfer, assign and deliver to ATMI all of MTG’s and its
Affiliates’ right, title and interest in, to and under the Acquired Assets, and ATMI has agreed to assume the Assumed Liabilities, in each case on the terms and conditions set forth therein. 

NOW THEREFORE, for good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged,
and intending to be legally bound hereby, it is hereby agreed that: 
 1. Definitions. Unless otherwise
defined herein, all capitalized terms used in this Assignment and Assumption Agreement shall have the meanings set forth in the Termination Agreement. 
 2. Assignment of Acquired Assets. Effective as of the Effective Date, MTG, on behalf of itself and its Affiliates, hereby sells, conveys, transfers, assigns and delivers to ATMI, all of its and its
Affiliates’ right, title and interest in, to and under the Acquired Assets, and ATMI hereby accepts such sale, conveyance, transfer, assignment and delivery from MTG, in each case on the terms and conditions set forth in the Termination
Agreement. 
 3. Assumption of Assumed Liabilities. Effective as of the Effective Date, ATMI hereby
assumes and accepts from MTG, in accordance with their respective terms, any and all of the Assumed Liabilities, in each case on the terms and conditions set forth in the Termination Agreement. 

4. Subject to the Termination Agreement. This Assignment and Assumption Agreement is being executed and delivered
pursuant to, and is subject in all respects to the terms and conditions of the Termination Agreement, and all of the representations, warranties, covenants and agreements of MTG and ATMI contained therein, all of which shall survive the execution
and delivery of this Assignment and Assumption Agreement in accordance with the terms and conditions of the Termination Agreement. Nothing in this Assignment and Assumption Agreement shall supersede, amend, alter, waive or modify (nor shall it be
deemed or construed to supersede, amend, alter, waive or modify) any of the terms or conditions of the 

 
Termination Agreement in any manner whatsoever. In no event shall this Assignment and Assumption Agreement be deemed or construed as creating any rights or obligations of MTG or ATMI that are in
any way in addition to, or otherwise different from, those set forth in the Termination Agreement. In the event of any conflict between the provisions of this Assignment and Assumption Agreement and the provisions of the Termination Agreement, the
provisions of the Termination Agreement shall control and prevail. 
 5. Successors and Assigns. No party
may assign this Assignment and Assumption Agreement without the consent of the other party; provided, that, without such consent but with written notice to the other party: (a) ATMI may transfer or assign this Assignment and Assumption
Agreement to (i) one or more of its Affiliates (an “ATMI Assignee”), or (ii) any of its or any ATMI Assignee’s lenders as collateral security; provided, that no such transfer or assignment will relieve ATMI of
its obligations hereunder and (b) MTG may transfer or assign this Assignment and Assumption Agreement to one or more of its Affiliates; provided, that no such transfer or assignment will relieve MTG of its obligations hereunder. Any
assignment in violation of the foregoing shall be null and void. Subject to the foregoing, this Assignment and Assumption Agreement and all covenants and agreements contained herein and rights, interests or obligations hereunder, by or on behalf of
any of the parties hereto, shall bind and inure to the benefit of the parties hereto and their respective successors and permitted assigns of the parties hereto whether so expressed or not. For the avoidance of doubt, this Section 5
applies solely to assignment of this Assignment and Assumption Agreement; it does not apply to any assignment or other transfer of any of the Acquired Assets. 
 6. Counterparts. This Assignment and Assumption Agreement may be executed in counterparts (including by means of telecopied or scanned signature pages), any one of which need not contain the
signatures of more than one party, but all such counterparts taken together shall constitute one and the same agreement. 
 7. Amendments; Waiver. This Assignment and Assumption Agreement may only be amended in a writing, executed by MTG and ATMI, which states that it constitutes an amendment hereto and specifies the
provisions hereof being amended. Any provision of this Assignment and Assumption Agreement may be deemed to have been waived by a party only upon such party having executed and delivered to the other party a written instrument which states that it
constitutes a waiver hereunder and specifies the provisions hereof being waived. No course of dealing between or among the parties hereto shall be deemed effective to modify, amend or discharge any part of this Assignment and Assumption Agreement or
any rights or obligations of any such party or such holder under or by reason of this Assignment and Assumption Agreement. 
 8. Severability. Whenever possible, each provision of this Assignment and Assumption Agreement shall be interpreted in such manner as to be effective and valid under applicable law, but if any
provision of this Assignment and Assumption Agreement or the application of any such provision to any party or circumstance shall be held to be prohibited by, illegal or unenforceable under applicable law, such provision shall be ineffective only to
the extent of such prohibition, illegality or unenforceability, without invalidating the remainder of such provision or the remaining provisions of this Assignment and Assumption Agreement. Further, the parties agree to replace a prohibited, illegal
or unenforceable provision with a permitted, legal and enforceable provision which most closely approximates the intent and effect of the prohibited, illegal or unenforceable provision. 

 9. Governing Law; Jurisdiction. 

(a) All issues and questions concerning the construction, validity, enforcement and interpretation of this Assignment and
Assumption Agreement shall be governed by, and construed in accordance with, the laws of the State of New York without giving effect to any choice of law or conflict of law rules or provisions (whether of the State of New York or any other
jurisdiction) that would cause the application of the laws of any jurisdiction other than the State of New York. In furtherance of the foregoing, the internal law of the State of New York shall control the interpretation and construction of this
Assignment and Assumption Agreement, even though under that jurisdiction’s choice of law or conflict of law analysis, the substantive law of some other jurisdiction would ordinarily apply. 

(b) EACH OF THE PARTIES HERETO WAIVES ANY RIGHT IT MAY HAVE TO TRIAL BY JURY IN RESPECT OF ANY LITIGATION BASED ON,
ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS ASSIGNMENT AND ASSUMPTION AGREEMENT OR ANY COURSE OF CONDUCT, COURSE OF DEALING, VERBAL OR WRITTEN STATEMENT OR ACTION OF ANY PARTY HERETO. 

(c) Each of the parties hereto submits to the jurisdiction of any federal court sitting in New York, in any action or
proceeding arising out of or relating to this Assignment and Assumption Agreement and agrees that all claims in respect of the action or proceeding may be heard and determined in any such court; provided, that if such federal court does not have
jurisdiction, then each of the parties hereto submits to the jurisdiction of any state court in New York, and each of the parties hereby expressly submits to the personal jurisdiction and venue of such court for the purposes hereof and expressly
waives any claim of improper venue and any claim that such courts are an inconvenient forum. Each of the parties hereby irrevocably consent to the service of process of any of the aforementioned courts in any such suit, action or proceeding by the
mailing of copies thereof by registered or certified mail, postage prepaid, to its address set forth in the Termination Agreement. 

 Exhibit D 
 FORM OF 
 TRADEMARK ASSIGNMENT AGREEMENT 

This TRADEMARK ASSIGNMENT AGREEMENT (this “Trademark Assignment Agreement”) is made as of
[            ] by and between and Matheson Tri-Gas, Inc., a Delaware corporation (“MTG”) and Advanced Technology Materials, Inc., a Delaware corporation
(“ATMI”). 
 WHEREAS, ATMI and MTG are currently joint owners of the word and logo
trademark rights incorporating the “SDS” and “Safe Delivery Source” names, including, without limitation, the United States trademark registration numbers: 2205571, 3445321 and 3474537 and Japan trademark registration number
4785109, and all common law rights that exist relating thereto (the “Marks”); 

WHEREAS, MTG and ATMI have entered into a Termination Agreement, dated as of the date hereof (the
“Termination Agreement”), pursuant to which, among other things, the parties have terminated the SDS Agreement and VAC Agreement, and ATMI has purchased certain assets and assumed certain liabilities of MTG relating to the Business,
in each case on the terms and conditions set forth therein; and 
 WHEREAS, pursuant to the Termination
Agreement, MTG has agreed to sell, convey, transfer, assign and deliver to ATMI all of MTG’s right, title and interest in, to and under the Marks with the intent that ATMI be the sole owner of the Marks, in each case on the terms and conditions
set forth therein. 
 NOW THEREFORE, for good and valuable consideration, the receipt and sufficiency of
which are hereby acknowledged, and intending to be legally bound hereby, it is hereby agreed that: 
 1.
Definitions. Unless otherwise defined herein, all capitalized terms used in this Trademark Assignment Agreement shall have the meanings set forth in the Termination Agreement. 

2. Assignment. MTG hereby sells, transfers, conveys, assigns and delivers to ATMI all of MTG’s right, title
and interest in, to and under the Marks, for ATMI’s own use and behalf, and for the use and behalf of ATMI’s successors, assigns or other legal representatives, as fully and entirely as the same would have been held and enjoyed by MTG if
this assignment and sale had not been made; and the right to file any action and recover damages by reason of past, present or future infringement, misappropriation, dilution or other unauthorized use of said Marks, with the right to sue for, and
collect same for its own use and behalf, and for the use and behalf of its successors, assigns, or other legal representatives. Upon the execution of this Trademark Assignment Agreement, the parties hereto agree that ATMI shall be the sole and
exclusive owner of the Marks. 

 3. Documentation. MTG hereby agrees to execute, acknowledge and
deliver to ATMI all documents, instruments and agreements as may be necessary to make a record with any governmental authorities (both foreign and domestic) or third parties of, and to otherwise more fully confirm, ATMI’s ownership of all
right, title and interest in, to and under the Marks, pursuant to the terms and conditions of Section 6.3(a) of the Termination Agreement. 
 4. Subject to the Termination Agreement. This Trademark Assignment Agreement is being executed and delivered pursuant to, and is subject in all respects to the terms and conditions of the
Termination Agreement, and all of the representations, warranties, covenants and agreements of MTG and ATMI contained therein, all of which shall survive the execution and delivery of this Trademark Assignment Agreement in accordance with the terms
and conditions of the Termination Agreement. Nothing in this Trademark Assignment Agreement shall supersede, amend, alter, waive or modify (nor shall it be deemed or construed to supersede, amend, alter, waive or modify) any of the terms or
conditions of the Termination Agreement in any manner whatsoever. In no event shall this Trademark Assignment Agreement be deemed or construed as creating any rights or obligations of MTG or ATMI that are in any way in addition to, or otherwise
different from, those set forth in the Termination Agreement. In the event of any conflict between the provisions of this Trademark Assignment Agreement and the provisions of the Termination Agreement, the provisions of the Termination Agreement
shall control and prevail. 
 5. Successors and Assigns. No party may assign this Trademark Assignment
Agreement without the consent of the other party; provided, that, without such consent but with written notice to the other party: (a) ATMI may transfer or assign this Trademark Assignment Agreement to (i) one or more of its
Affiliates (an “ATMI Assignee”), or (ii) any of its or ATMI Assignee’s lenders as collateral security; provided, that no such transfer or assignment will relieve ATMI of its obligations hereunder and (b) MTG
may transfer or assign this Trademark Assignment Agreement to one or more of its Affiliates; provided, that no such transfer or assignment will relieve MTG of its obligations hereunder. Any assignment in violation of the foregoing shall be
null and void. Subject to the foregoing, this Trademark Assignment Agreement and all covenants and agreements contained herein and rights, interests or obligations hereunder, by or on behalf of any of the parties hereto, shall bind and inure to the
benefit of the parties hereto and their respective successors and permitted assigns of the parties hereto whether so expressed or not. For the avoidance of doubt, this Section 5 applies solely to assignment of this Trademark Assignment
Agreement; it does not apply to any assignment or other transfer of any of the Acquired Assets. 
 6.
Counterparts. This Trademark Assignment Agreement may be executed in counterparts (including by means of telecopied or scanned signature pages), any one of which need not contain the signatures of more than one party, but all such
counterparts taken together shall constitute one and the same agreement. 
 7. Amendments; Waiver. This
Trademark Assignment Agreement may only be amended in a writing, executed by MTG and ATMI, which states that it constitutes an amendment hereto and specifies the provisions hereof being amended. Any provision of this Trademark Assignment Agreement
may be deemed to have been waived by a party only upon such party having executed and delivered to the other party a written instrument which states that it constitutes a waiver hereunder and specifies the provisions hereof being waived. No course
of dealing between or among the parties hereto shall be deemed effective to modify, amend or discharge any part of this Trademark Assignment Agreement or any rights or obligations of any such party or such holder under or by reason of this Trademark
Assignment Agreement. 

 8. Severability. Whenever possible, each provision of this Trademark
Assignment Agreement shall be interpreted in such manner as to be effective and valid under applicable law, but if any provision of this Trademark Assignment Agreement or the application of any such provision to any party or circumstance shall be
held to be prohibited by, illegal or unenforceable under applicable law, such provision shall be ineffective only to the extent of such prohibition, illegality or unenforceability, without invalidating the remainder of such provision or the
remaining provisions of this Trademark Assignment Agreement. Further, the parties agree to replace a prohibited, illegal or unenforceable provision with a permitted, legal and enforceable provision which most closely approximates the intent and
effect of the prohibited, illegal or unenforceable provision. 
 9. Governing Law; Jurisdiction

 (a) All issues and questions concerning the construction, validity, enforcement and interpretation of this
Trademark Assignment Agreement shall be governed by, and construed in accordance with, the laws of the State of New York without giving effect to any choice of law or conflict of law rules or provisions (whether of the State of New York or any other
jurisdiction) that would cause the application of the laws of any jurisdiction other than the State of New York. In furtherance of the foregoing, the internal law of the State of New York shall control the interpretation and construction of this
Trademark Assignment Agreement, even though under that jurisdiction’s choice of law or conflict of law analysis, the substantive law of some other jurisdiction would ordinarily apply. 

(b) EACH OF THE PARTIES HERETO WAIVES ANY RIGHT IT MAY HAVE TO TRIAL BY JURY IN RESPECT OF ANY LITIGATION BASED ON,
ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS TRADEMARK ASSIGNMENT AGREEMENT OR ANY COURSE OF CONDUCT, COURSE OF DEALING, VERBAL OR WRITTEN STATEMENT OR ACTION OF ANY PARTY HERETO. 

(c) Each of the parties hereto submits to the jurisdiction of any federal court sitting in New York, in any action or
proceeding arising out of or relating to this Trademark Assignment Agreement and agrees that all claims in respect of the action or proceeding may be heard and determined in any such court; provided, that if such federal court does not have
jurisdiction, then each of the parties hereto submits to the jurisdiction of any state court in New York, and each of the parties hereby expressly submits to the personal jurisdiction and venue of such court for the purposes hereof and expressly
waives any claim of improper venue and any claim that such courts are an inconvenient forum. Each of the parties hereby irrevocably consent to the service of process of any of the aforementioned courts in any such suit, action or proceeding by the
mailing of copies thereof by registered or certified mail, postage prepaid, to its address set forth in the Termination Agreement. 

 Exhibit E 
 Indemnification Procedures 
 (a) Procedures for
Non-Third Party Claims. No more than thirty (30) days following the Indemnitee’s actual knowledge of any claim that it has under Article V of this Agreement that may result in a Loss (a “Claim”), the Indemnitee shall give
written notice thereof (a “Claims Notice”) to the Indemnitor. A Claims Notice must describe the Claim in reasonable detail, and indicate the amount (estimated, as necessary and to the extent feasible) of the Loss. No failure to timely
provide a Claims Notice by the Indemnitee will relieve the Indemnitor of any indemnity and other obligations hereunder unless and to the extent the Indemnitor shall be actually prejudiced by such failure to notify the Indemnitor. The Indemnitee
shall reasonably cooperate and assist the Indemnitor in determining the validity of any claim for indemnity by the Indemnitee and in otherwise resolving such matters. Such assistance and cooperation may include providing reasonable access to
information, records and documents relating to such matters and furnishing relevant and available employees to assist in the investigation, defense and resolution of such matters during normal business hours and after reasonable advance notice. If
the information to be disclosed includes confidential, trade secret or commercially sensitive information, the disclosing party may require an appropriate confidentiality agreement. The Indemnitor shall respond to the Claims Notice (a “Claim
Response”) within thirty (30) days (the “Response Period”) after the date that the Claims Notice is received by the Indemnitor. Any Claim Response must specify whether or not the Indemnitor disputes the Claim described in the
Claims Notice. If the Indemnitor fails to give a Claim Response within the Response Period and the Indemnitee does not agree to an extension, the Indemnitor will be deemed to have conceded the Claim described in the related Claims Notice. If the
Indemnitor elects not to dispute a Claim described in a Claims Notice, whether by failing to give a timely Claim Response or otherwise, then the Claims alleged in such Claims Notice will be conclusively deemed to be conceded by the Indemnitor. If
the Indemnitor delivers a Claim Response within the Response Period indicating that it disputes one or more of the matters identified in the Claims Notice, the Indemnitor and the Indemnitee shall promptly meet and use commercially reasonable efforts
to settle the dispute using the dispute resolution procedure set forth in Section 8.1 of the Agreement. If the Indemnitor and the Indemnitee are unable to reach agreement within thirty (30) days after the conclusion of the Response Period,
then either the Indemnitor or the Indemnitee may resort to other legal remedies subject to the limitations set forth in Article V of this Agreement. 
 (b) Third Party Claim Process. No more than thirty (30) days following the Indemnitee’s actual knowledge of any third party claim that it has under Article V of this Agreement that may
result in a Loss (a “Third Party Claim”), the Indemnitee shall give written notice thereof (a “Third Party Claims Notice”) to the Indemnitor. A Third Party Claims Notice must describe the Claim in reasonable detail, indicate the
amount (estimated, as necessary and to the extent feasible) of the Loss, and state whether Indemnitee contends that such Loss is directly and solely attributable to events or circumstances for which Indemnitor has indemnification obligations
pursuant to Section 5.2 of the Agreement. No failure to timely provide a Third Party Claims Notice by the Indemnitee will relieve the Indemnitor of any indemnity and other obligations hereunder unless and to the extent the Indemnitor shall be
actually prejudiced by such failure to notify the Indemnitor. The Indemnitor shall assume the defense of any Third Party Claim for which the Third Party Claims Notice has stated that the expected Loss arising

 
therefrom is directly and solely attributable to events or circumstances for which Indemnitor has indemnification obligations pursuant to Section 5.2 of the Agreement and any litigation
resulting therefrom with counsel of its choice; provided, however, that the assumption of the defense of such Third Party Claim shall not preclude the Indemnitor from challenging whether the Third Party Claim arose from events or
circumstances for which the Indemnitee may be wholly or partially responsible. The Indemnitee shall reasonably cooperate and assist the Indemnitor in determining (i) the validity of any Claim described in the Third Party Claims Notice and
(ii) whether such Claim arose directly and solely from events or circumstances for which Indemnitor has provided indemnification to Indemnitee pursuant to Section 5.2 of the Agreement, and in defending against any Third Party Claim. Such
assistance and cooperation may include providing reasonable access to information, records and documents relating to such matters and furnishing relevant and available employees to assist in the investigation, defense and resolution of such matters
during normal business hours and after reasonable advance notice. If the information to be disclosed includes confidential, trade secret or commercially sensitive information, the disclosing party may require an appropriate confidentiality
agreement. With respect to any Third Party Claim for which the Third Party Claims Notice has not stated that the expected Loss arising therefrom is directly and solely attributable to events or circumstances for which Indemnitor has indemnification
obligations pursuant to Section 5.2 of the Agreement, the Indemnitor shall have thirty (30) days from the date on which the Indemnitor received the Third Party Claims Notice to notify the Indemnitee in writing that the Indemnitor desires
to assume the defense of the Third Party Claim and any litigation resulting therefrom with counsel of its choice. If the Indemnitor fails to assume the defense of any Third Party Claim for which it is required to provide such defense hereunder, or
if the Indemnitor fails to timely deliver to Indemnitee notice of its election to assume the defense of any Third Party Claim for which it is not required to provide such defense hereunder, the Indemnitee shall assume the defense of such Third Party
Claim. If the Indemnitor assumes the defense of any Third Party Claim in accordance herewith: 

(i) the Indemnitee shall be entitled to participate in the defense of such claim and to employ counsel of
its choice for such purpose, but the Indemnitor shall control the investigation, defense and settlement thereof; provided, that the fees and expenses of such separate counsel shall be borne by the Indemnitee (other than any fees and expenses
of such separate counsel (A) that are incurred prior to the date the Indemnitor effectively assumes control of such defense or (B) retained because a conflict of interest exists between the Indemnitor and the Indemnitee, each of which,
notwithstanding the foregoing, shall be borne by the Indemnitor); 
 (ii) the Indemnitee shall
not file any papers or consent to the entry of any judgment or enter into any settlement with respect to such Third Party Claim without the prior written consent of the Indemnitor; 

(iii) the Indemnitor shall obtain the prior written consent of the Indemnitee (which consent shall not
unreasonably be withheld, delayed or conditioned) before entering into any settlement of a Third Party Claim, pursuant to or as a result of such settlement, injunctive or other equitable relief will be imposed against the Indemnitee or if such
settlement does not expressly and unconditionally release the Indemnitee from all Liabilities with respect to such claim, with prejudice; and 

 (iv) the Indemnitor will not be obligated to indemnify the
Indemnitee hereunder with respect to any settlement entered into or any judgment consented to by the Indemnitee without the Indemnitor’s prior written consent. 
 If the Indemnitor does not assume the defense of such Third Party Claim within thirty (30) days of receipt of the Third Party Claims Notice or if, at any time after the Indemnitor has assumed the
defense of a Third Party Claim, the Indemnitor fails to perform or unreasonably delays in performing its obligations to assume or pursue the defense of any such Thirty Party Claim and such failure or delay in performance would adversely affect the
Indemnitee, the Indemnitee will be entitled to assume such defense, at the cost and expense of the Indemnitor (subject to the limitations on such Indemnitor’s indemnification liability set forth in Article V of the Agreement), upon
delivery of notice to such effect to the Indemnitor. 
 Notwithstanding the Indemnitor’s assumption of the defense of any
Third Party Claim for which the Third Party Claims Notice has stated that the expected Loss is directly and solely attributable to events or circumstances for which the Indemnitor has indemnification obligations pursuant to Section 5.2 of the
Agreement, and notwithstanding the Indemnitee’s assumption of the defense of any Third Party Claim (other than a Third Party Claim for which Indemnitor was required, but failed, to assume the defense or elected to assume, but then failed to
properly and timely provide a defense), upon the final resolution of such Third Party Claim and determination of the amount of Loss (the “Final Resolution”), the Indemnitor may notify the Indemnitee that the Loss concerned was not
directly and solely attributable to events or circumstances for which Indemnitor was required to provide indemnification pursuant to Section 5.2 of the Agreement or was a shared Liability of the Parties, any such notice (a
“Challenge”) to be made in writing within thirty (30) days after the Final Resolution and to include, among other things, a statement identifying the portion of the Loss that should be borne by Indemnitee, and, if applicable,
the portion of the expenses incurred by the Indemnitor in connection with the defense of the Third Party Claim. If a Challenge is timely asserted by Indemnitor, the Indemnitor and Indemnitee shall promptly meet and use their commercially reasonable
efforts to settle the dispute using the dispute resolution procedures set forth in Section 8.1 of the Agreement. 
 The
parties shall act in good faith in responding to, defending against, settling or otherwise dealing with Third Party Claims, and cooperate in any such defense and give each other reasonable access to all information relevant thereto. 

 Exhibit F 
 MTG Competitors 
  

					
	 Advanced Specialty Gases
 Air Products
 Airgas

Air Liquide
 Air
Water Inc
 ARC
 Arconic
 Central Glass

Chem Gas
 Coatsu
Gas Kogyo Co., Ltd.
 Daido Air Products Electronics, Inc.

Daiho Sangyo Inc.

Daio Co., Ltd.

DNF
 Eto Oxygen
Co., Ltd.
 Foosung
 Fuso Industrial Co., Ltd.
 Fujii Shoji Co.,Ltd.

Fujiox Co., Ltd.

Fujisanso Industry Co., Ltd.
 The Fukuoka Oxygen Mgf Co. Ltd.
 Gelest

Giga Gas
 Hokusan
Co., Ltd.
 Hong Kong Specialty Gas
 Hoshiiryo Sanki Co., Ltd.
 Itochu Industrial Gas Co., Ltd.

Iwatani Corporation
 Iwatani Gasnetwork Corporation
 Japan Air Gases LTD

Japan Material Co.,Ltd
 Jinhong
 Jinhe Science

Kagaku Kousjo Co., Ltd.
 Kamimaru Co., Ltd.
 Kaneko Shokai Co., Ltd.
	  	 Kanto Denka
 Koike Sanso
Kogyo Co., Ltd.
 Kumamoto Sanso Corporation
 Kyoei Sangyo Co.Ltd.
 Lienhwa Industrial Gas

Linde
 Lingas

Marketech
 Maruyoshi Kozai Co.,Ltd.

Matsumoto Sangyo Co., Ltd.
 Messer

Mitsubisi Corporation.
 Mitsui & Co.,
Ltd.
 Miyabara Sanso Co., Ltd.
 MS
Gas
 Multi-Gas
 Nanjing Gas

Natachem
 Next One Co., Ltd.

Nitto Kohki Co., Ltd.
 Nova Gas

OCI Materials
 Okaya Sanso Co.,Ltd.

Pelchem
 Peric

Polygas
 Praxair

PSG
 Pujiang Gas

Sakaisangyo co.,Ltd.
 Sanin Sanso Co.,
Ltd.
 SDK
 Shimakyu Co., Ltd

Showa Denko K.K.
 Siad

Saisan Co.,Ltd.
 Sigma Aldrich
	  	Sojitz Corporation.
 SOL

Solvay
 South China Specialty Gas

Sumitomo Corporation
 Sumitomo Seika Chemicals
Co., Ltd.
 Suzuki CO., Ltd
 Suzuki
Shokan Co., Ltd.Takachiho
Trading Co., Ltd.
 Toatsu Yamazaki Co., Ltd.
 Tokai Yozai Corporation
 Takayama Corporation

Tokyo Gas Chemicals Co.,Ltd.
 Taihe

Tanabe Kogyo Co., Ltd.
 Toho Acetylene Co.,
Ltd.
 Tomoe Shokai Co., Ltd.

Topco
 Toyoko Kagaku Co.,Ltd.

Uchimura Sanso Co.,Ltd.
 Ueki Corporation Co.,
Ltd.
 Uno Sanso Co.,Ltd.

Voltaix
 Watari Co., Ltd.

Weisheng
 Whalee

Wonik Materials
 Yamagata Sanso
Corporation
 Yingde

 All above includes any and all Affiliates, successors and assigns. 

 Exhibit G 
 Manufacturing Specifications 
 Doc # TITLE 

	1	 SDS Cylinder Filling 

	2	 SDS Cylinder Labeling 

	3	 SDS Refill Quality Assurance 

	4	 SDS Cylinder Refilling Preparation 

	5	 Leak Checking SDS Cylinders 

	6	 SDS Valve Inspection 

	7	 SDS Statistical Process Control 

	8	 SDS Cylinder Baking (New Cylinders Only) 

	9	 Use of SDS VCR Go-NoGo Gauges 

	10	 SDS Cylinder Valving and Preparation 

	11	 Painting Electronic Gases and SDS Cylinders 

	12	 SDS Loading Isotherm-BF3 2 

	13	 SDS Loading Isotherm-PH3 2 

	14	 BF3 SDS Analysis and Fill Procedure 

	15	 SDS Return Qualification & Analysis (RGA) 

	16	 SDS Loading Isotherm-ASH3 2 

	17	 SiF4 SDS Analysis and Fill Procedure 

	18	 SDS Loading Isotherm-SIF4 2 

	19	 SDS Hydride Valve Closure Inspection via Go/Nogo Gauge 

	20	 SDS Temperature-Pressure Adjustment & Flow Meter-Fill Volume Settings 

	21	 TKO-SDS Lot Numbering Specification MTG Format 

	22	 Isotherm Data AsH3 SDS 3 g/g Loading Capacity @ 2 

	23	 SDS3 Cylinder Valving and Preparation 

	24	 Isotherm Data 

	25	 Isotherm Data SDS3-Phosphine 

	26	 Post Toroid Polishing Valve Inspection 

	27	 Removing Cylinders From Manifolds 

	28	 Cylinder Status Indication 

	29	 Cylinder Transport Caps and Cylinder Collars 

	30	 Cylinder Pre-Fill Inspection 

	31	 Small Cylinder Sandblaster 

	32	 External Blasting of Cylinders 

	33	 SDS Cylinder Leak Check Chamber Operating Work Instruction 

	34	 SDS2 Specifications Sheet 

 Exhibit H 
 Product Specifications 
  

	(1)	 Matheson Tri-Gas—Essential Materials for Semiconductor Manufacturing—Semiconductor Products Catalog Version 4.3.

  

	(2)	 Matheson Tri-Gas—SDS3 Safe Delivery Source 

  

	(3)	 ATMI—Product Specification Forms—SDS & VAC. 

 Exhibit I 
 Inventory Purchase Price Calculation 
 Matheson TriGas, Inc.

 Inventory Purchase at Close 
 YTD September 30, 2011 
  

				September 30,				September 30,	
	 MTG Europe
	    	 	SDS	  	  	$	7,189,024	  
		    	 	VAC	  	  	 	87,000	  
			
	 MTG US
	    	 	SDS	* 	  	$	0	  
		    	 	VAC	  	  	 	867,250	  
		    				  	  
	  
	 
		
	 Total Purchase Price
	   
	  	$	8,143,274	  
		    				  	  
	  
	 

  

	*	 MTG has not yet paid ATMI for the SDS inventory in the US. No payment is required by ATMI, although title will pass to ATMI.

 NOTE: VALUES ARE ESTIMATES ONLY, FOR ILLUSTRATION. ACTUAL VALUES WILL BE CALCULATED BASED ON UNIT PRICES AND ACTUAL
INVENTORY LEVELS AS OF CLOSING DETERMINED BY INVENTORY COUNTS. 

 Exhibit J 
 Manufacturing Fee Calculation 
 Matheson TriGas, Inc.

 Inventory Manufacturing Cost Fee 
 YTD September 30, 2011 
  

				September 30,	
	 MTG USA-SDS
	    	$	2,605,173	  
		
	 MGPK Korea—SDS
	    	$	213,925	  
		    	  
	  
	 
		
	 Total Purchase Price
	    	$	2,819,097	  
		    	  
	  
	 

 NOTE: VALUES ARE ESTIMATES ONLY, FOR ILLUSTRATION. ACTUAL VALUES WILL BE DETERMINED BASED ON UNIT MANUFACTURING COSTS AND
ACTUAL INVENTORY LEVELS AS OF CLOSING DETERMINED BY INVENTORY COUNTS. 

 Exhibit K 
 Standard Form MTG Purchase Order Terms and Conditions 
 MTG
Warranty 
 Warranty. MATHESON warrants that the Products when delivered to the PURCHASER shall conform to
MATHESON’s standard specifications for the warranty period specified in such specifications. MATHESON also warrants that the Products shall be lawfully sold to give PURCHASER good title thereto. This warranty is void for any Product that has
been repaired or altered by anyone other than an authorized employee of MATHESON. THE WARRANTIES AND REMEDIES STATED IN THIS SECTION ARE EXCLUSIVE. ALL OTHER WARRANTIES, WHETHER EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, ARE HEREBY EXCLUDED. 
 Indemnification and Limitation.
MATHESON shall not be liable for, and the PURCHASER hereby indemnifies and agrees to defend MATHESON from and against any claims arising from, the death or injury to any persons or damage to any property attributable to the negligence or willful
misconduct of the PURCHASER or any end user or of the respective employees or agents of either. The PURCHASER shall not be liable for, and MATHESON hereby indemnifies and agrees to defend the PURCHASER from and against any claims arising from,
property damage or death or injury to any persons to the extent attributable to the negligence or willful misconduct of MATHESON or its employees or agents, or the failure of the Products to conform to MATHESON’s standard specifications during
the warranty period specified in such specifications. In no event shall MATHESON or the PURCHASER be liable for any incidental, special, indirect or consequential damages, even if advised of the possibility of those damages. PURCHASER agrees the
forgoing exclusion and limitation is a reasonable allocation of risk. 
 [NOTE: THE SDS AND VAC PRODUCTS ARE WARRANTED TO THE SPECIFICATIONS SET
FORTH IN EXHIBIT K.] 

 Exhibit L 
 TNSC Side Letter 
 Matheson Tri-Gas, Inc. 

150 Allen Road 
 Basking Ridge, NJ 07920 
 October 31, 2011 

Advanced Technology Materials, Inc. 
 7 Commerce
Drive 
 Danbury, CT 06810 
 Taiyo
Nippon Sanso Corp. 
 1-3-26 Koyama 

Shinagawa-ku 
 Tokyo 142-8558 Japan 

Attn: Fumio Hara 
 Gentlemen: 

Reference is hereby made to: (a) the Termination Agreement, dated as of the date hereof (the “Termination
Agreement”), between Advanced Technology Materials, Inc. (“ATMI”) and Matheson Tri-Gas, Inc. (“MTC”), which is a wholly-owned subsidiary of Taiyo Nippon Sanso Corp. (“TNSC”); and
(b) the Transition Services Agreement, dated as of the date hereof, between ATMI and MTG (the “TSA”). Any capitalized terms used but not defined in this letter agreement (this “Agreement”) have the respective
meanings set forth in the Termination Agreement or the TSA, as applicable. 
 The Termination Agreement provides
for certain actions to be taken by TNSC or its subsidiaries other than MTG (the “Other Subsidiaries”) and the TSA provides for certain actions to be taken by the Other Subsidiaries. TNSC is entering into this letter agreement (this
“Agreement”) in order to induce ATMI to enter into the Termination Agreement and the TSA. Accordingly, by this Agreement, the parties hereby agree as follows: 

1. Sale of Cylinders. To the extent that any of the Acquired Assets consisting of MTG-Owned Cylinders are the
property of TNSC or any of the Other Subsidiaries (rather than the property of MTG), TNSC hereby consents, on behalf of itself and the applicable Other Subsidiary, to the transfer of each such MTG-Owned Cylinder to ATMI or its designated Affiliate
pursuant to the Termination Agreement and agrees to take, and cause any applicable Other Subsidiary to take, such actions as are necessary in order to effect transfer of such MTG-Owned Cylinder from TNSC or the applicable Other Subsidiary to ATMI or
its designated Affiliate on the terms and conditions set forth in the Termination Agreement. 
 2. Sale of
Gas Inventory. To the extent that any of the Acquired Assets consisting of Gas Inventory are the property of any of the Other Subsidiaries (rather than the property of MTG), TNSC hereby consents, on behalf of the applicable Other Subsidiary, to
the transfer by the applicable Other Subsidiary of all such Gas Inventory to ATMI or its designated Affiliate pursuant to the Termination Agreement and agrees to cause any applicable Other Subsidiary to take such actions as are necessary in order to
effect transfer of all such Gas Inventory from the applicable Other Subsidiary to ATMI or its designated Affiliate on the terms and conditions set forth in the Termination Agreement. 

3. Assignment of Contracts. To the extent that any of the Other Subsidiaries (rather than MTG) is the party to any
of the Assumed Contracts, TNSC hereby consents, on behalf of the applicable Other Subsidiary, to the assignment of each such Assumed Contract to ATMI or its designated Affiliate pursuant to the Termination Agreement and agrees to take, and cause any
applicable Other Subsidiary to take, such actions as are reasonably requested by ATMI in order to effect assignment of such Assumed Contract by the applicable Other Subsidiary to ATMI or its designated Affiliate on the terms and conditions set forth
in the Termination Agreement. 

 4. TSA Services. To the extent that any of the Support Services under
the TSA are to be performed by Other Subsidiaries (rather than MTG), TNSC hereby agrees to cause the applicable Other Subsidiary to provide the applicable Support Service on the terms and conditions set forth in the TSA. 

5. Remedies. The parties hereto agree that: (a) irreparable harm for which monetary damages, even if
available, would not be an adequate remedy, would occur in the event that TNSC does not perform its obligations under the provisions of this Agreement in accordance with its terms or otherwise breaches such provisions and, accordingly, ATMI shall be
entitled to an injunction or injunctions, specific performance, or other equitable relief, to prevent breaches of this Agreement by TNSC and to enforce specifically the terms and provisions hereof against TNSC in the courts described in
Section 6(j) below without being required to prove irreparable harm relating to such breach or the inadequacy of monetary damages with respect thereto (collectively, the “Equitable Remedies”), this being in addition to any
remedy to which ATMI is entitled under the Termination Agreement, and (b) the right to the Equitable Remedies is an integral part of the Transactions and without that right, ATMI would not have entered into the Termination Agreement.
Notwithstanding anything to the contrary herein or otherwise, (x) ATMI irrevocably waives any right to obtain monetary damages from TNSC concerning any breach of this Agreement by TNSC and, accordingly, the Equitable Remedies shall constitute
ATMI’s sole and exclusive remedy from TNSC concerning any such breach; and (y) ATMI shall be entitled to monetary damages solely from MTG pursuant to Section 5 of the Termination Agreement with respect to its losses resulting
from any breach by TNSC hereunder, it being understood that any breach by TNSC hereunder shall constitute a breach by MTG of the Termination Agreement. 
 6. Miscellaneous. 
 (a) Consent to Amendments;
Waivers. This Agreement may be amended, or any provision of this Agreement may be waived upon the approval, in a writing, executed by ATMI, MTG and TNSC. No course of dealing between or among the parties hereto shall be deemed effective to
modify, amend or discharge any part of this Agreement or any rights or obligations of any such party or such holder under or by reason of this Agreement. 
 (b) Successors and Assigns. No party may assign any of its rights or delegate any of its duties under this Agreement without the consent of the other parties; provided that, without such
consent, (i) ATMI may transfer or assign this Agreement: (A) to one or more of its Affiliates to which ATMI assigns the Termination Agreement in accordance with its terms (an “ATMI Assignee”), or (B) to any of its or
any ATMI Assignee’s lenders as collateral security; provided that no such transfer or assignment will relieve ATMI of its obligations hereunder; (ii) MTG may transfer or assign this Agreement: (A) to one or more of its
Affiliates to which MTG assigns the Termination Agreement in accordance with its terms (a “MTG Assignee”), or (B) any of its or any MTG Assignee’s lenders as collateral security; provided that no such transfer or
assignment will relieve MTG of its obligations hereunder; and (iii) TNSC may transfer or assign this Agreement to any of its lenders as collateral security; provided that no such transfer or assignment will relieve TNSC of its
obligations hereunder. Subject to the foregoing, this Agreement and all covenants and agreements contained herein and rights, interests or obligations hereunder, by or on behalf of any of the parties hereto, shall bind and inure to the benefit of
the respective successors and permitted assigns of the parties hereto whether so expressed or not. 
 (c)
Severability. Whenever possible, each provision of this Agreement shall be interpreted in such manner as to be effective and valid under applicable law, but if any provision of this Agreement or the application of any such provision to any
Person or circumstance shall be held to be prohibited by, illegal or unenforceable under applicable law or rule in any respect by a court of competent jurisdiction, such provision shall be ineffective only to the extent of such prohibition,
illegality or unenforceability, without invalidating the remainder of such provision or the remaining provisions of this Agreement. 

  
 2 

 (d) Counterparts. This Agreement may be executed in counterparts
(including by means of telecopied signature pages), any one of which need not contain the signatures of more than one party, but all such counterparts taken together shall constitute one and the same agreement. 

(e) Descriptive Headings; Interpretation. The headings and captions used in this Agreement and the table of
contents to this Agreement are for reference purposes only and shall not affect in any way the meaning or interpretation of this Agreement. The use of the word “including” herein shall mean “including but not limited to.”

 (f) Entire Agreement. This Agreement and all other documents contemplated by the Termination Agreement
contain the entire agreement and understanding among the parties hereto with respect to the subject matter hereof and supersede all prior agreements and understandings, whether written or oral, relating to such subject matter. 

(g) No Third-Party Beneficiaries. This Agreement is for the sole benefit of the parties hereto and their permitted
successors and assigns and nothing herein expressed or implied shall give or be construed to give any Person, other than the parties hereto and such permitted successors and assigns, any legal or equitable rights hereunder. 

(h) Governing Law. All issues and questions concerning the construction, validity, enforcement and interpretation
of this Agreement shall be governed by, and construed in accordance with, the laws of the State of New York without giving effect to any choice of law or conflict of law rules or provisions (whether of the State of New York or any other
jurisdiction) that would cause the application of the laws of any jurisdiction other than the State of New York. In furtherance of the foregoing, the internal law of the State of New York shall control the interpretation and construction of this
Agreement, even though under that jurisdiction’s choice of law or conflict of law analysis, the substantive law of some other jurisdiction would ordinarily apply. 

(i) Waiver of Jury Trial. EACH OF THE PARTIES HERETO WAIVES ANY RIGHT IT MAY HAVE TO TRIAL BY JURY IN RESPECT OF
ANY LITIGATION BASED ON, ARISING OUT OF, UNDER OR IN CONNECTION WITH THIS AGREEMENT OR ANY COURSE OF CONDUCT, COURSE OF DEALING, VERBAL OR WRITTEN STATEMENT OR ACTION OF ANY PARTY HERETO. 

(j) Jurisdiction. Each of the parties hereto submits to the jurisdiction of any state or federal court sitting in
New York, in any action or proceeding arising out of or relating to this Agreement and agrees that all claims in respect of the action or proceeding may be heard and determined in any such court and hereby expressly submits to the personal
jurisdiction and venue of such court for the purposes hereof and expressly waives any claim of improper venue and any claim that such courts are an inconvenient forum. Each of the parties hereby irrevocably consent to the service of process of any
of the aforementioned courts in any such suit, action or proceeding by the mailing of copies thereof by registered or certified mail, postage prepaid, to its address set forth in Section 6(k). 

(k) Notices. All notices, demands or other communications to be given or delivered under or by reason of the
provisions of this Agreement shall be in writing and shall be deemed to have been given when delivered personally to the recipient or when sent by facsimile (with hard copy to follow), three Business Days after being sent to recipient by U.S. First
Class mail (postage prepaid), or one Business Day after being sent to the recipient by reputable overnight courier service (charges prepaid). Such notices, demands and other communications shall be sent to ATMI, MTG or TNSC at their respective
addresses indicated below or to such other address or to the attention of such other Person as the recipient party has specified by prior written notice to the sending party. All notices, demands and other communications hereunder may be given by
any other means (including telecopy or electronic mail), but shall not be deemed to have been duly given unless and until it is actually received by the intended recipient. 

  
 3 

 MTG: 

Matheson Tri-Gas, Inc. 

150 Allen Road 

Basking Ridge, NJ 07920 

Attn: General Counsel 

Fax: 908-991-9390 

TNSC: 

Taiyo Nippon Sanso 

1-3-26 Koyama 

Shinagawa-ku 

Tokyo 142-8558 Japan 

Attn: Toshihiko hamada 

Fax: +81-3-6866-1665 

in each case with a copy to (which shall not constitute notice to MTG or TNSC): 

Kelley Diye & Warren LLP 

101 Park Avenue 

New York, NY 10178 

Attn: Richard Lury, Esq. 

Facsimile No.: (212) 808-7897 

ATMI: 

Advanced Technology Materials, Inc. 

7 Commerce Drive 

Danbury, CT 06810 

Attn: Ellen T. Harmon 

Facsimile No.: (203) 797-2544 

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

Latham & Watkins LLP 

885 Third Avenue 

New York, NY 10022 

Attn: Howard A. Sobel, Esq. 

          Marcelo Halpern, Esq. 

Facsimile No.: (212) 751-4864 

(l) No Strict Construction. The parties hereto have participated jointly in the negotiation and drafting of this
Agreement. In the event an ambiguity or question of intent or interpretation arises, this Agreement shall be construed as if drafted jointly by the parties hereto, and no presumption or burden of proof shall arise favoring or disfavoring any party
hereto by virtue of the authorship of any of the provisions of this Agreement. 

  
 4 

 If you agree with the terms and conditions set forth in this Agreement, please sign as
indicated below and return a signed copy hereof to the undersigned, at which point this Agreement will constitute a binding agreement of the parties. 

 

			
	Sincerely,
	
	MATHESON TRI-GAS, INC.
		
	By:	 	/s/ Stephen I. Stroud
	Name:	 	Stephen I. Stroud
	Title:	 	 Secretary

 Agreed and accepted as of the date set forth above:  

ADVANCED TECHNOLOGY MATERIALS, INC. 
  

			
		
	By:	 	 /s/ Douglas Neugold

	Name:	 	 Douglas Neugold

	Title:	 	 Chairman, CEO, President

 TAIYO NIPPON SANSO CORP. 
  

			
		
	By:	 	 /s/ Fumio Hara

	Name:	 	Fumio Hara
	Title:	 	Executive Vice President

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