Document:

EX-10.10

 Exhibit 10.10 

SUPERTEX, INC. 

INDEMNIFICATION AGREEMENT 

Introduction 
 This Indemnification
Agreement (the “Agreement”) is entered into as of             , 20            (the “Effective Date”), by
and between Supertex, Inc., a California corporation (the “Corporation”), and             (“Indemnitee”). Various terms used in this Agreement are as defined throughout
this Agreement, with the definition followed by a parenthetical with the defined term in quotation marks. Other terms are as defined in Section 20. 

Background 
 A. Indemnitee is
either a member of the board of directors of the Corporation (the “Board of Directors”) or an officer of the Corporation, or both, and in such capacity or capacities, or otherwise as an Agent of the Corporation, is performing a valuable
service for the Corporation. 
 B. Indemnitee is willing to serve, continue to serve and to take on additional service for or on behalf of
the Corporation on the condition that he or she be indemnified as provided in this Agreement. 
 C. It is intended that Indemnitee shall be
paid promptly by the Corporation all amounts necessary to effectuate in full the indemnity provided in this Agreement. 
 Agreement 

Based upon the facts and premises contained in the above Background and the mutual promises below, and intending to be
legally bound by this Agreement, the Corporation and Indemnitee hereby agree as follows: 
 1. Services by Indemnitee.
Indemnitee agrees to serve (a) as a director or an officer of the Corporation, or both, so long as Indemnitee is duly appointed or elected and qualified in accordance with the applicable provisions of the Articles of Incorporation and bylaws of
the Corporation, and until such time as Indemnitee resigns or fails to stand for election or is removed from Indemnitee’s position, or (b) otherwise as an Agent of the Corporation. Indemnitee may from time to time also perform other
services at the request or for the convenience of, or otherwise benefiting, the Corporation. Indemnitee may at any time and for any reason resign or be removed from such position (subject to any other contractual obligation or other obligation
imposed by operation of law), in which event the Corporation shall have no obligation under this Agreement to continue Indemnitee in any such position. 

  
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 2. Indemnification Arising out of Action Other Than by Right of the Corporation. The
Corporation shall indemnify Indemnitee if Indemnitee was or is a party or is threatened to be made a party to any Proceeding (other than an action by or in the right of the Corporation to procure a judgment in its favor) by reason of the fact that
Indemnitee is or was an Agent, against Expenses, judgments, fines, settlements and other amounts actually and reasonably incurred in connection with such Proceeding if Indemnitee acted in good faith and in a manner Indemnitee reasonably believed to
be in the best interests of the Corporation and, in the case of a criminal proceeding, had no reasonable cause to believe the conduct of Indemnitee was unlawful. The termination of any proceeding by judgment, order, settlement, conviction or upon a
plea of nolo contendere or its equivalent shall not, of itself, create a presumption that Indemnitee did not act in good faith and in a manner which Indemnitee reasonably believed to be in the best interests of the Corporation or that Indemnitee had
reasonable cause to believe that Indemnitee’s conduct was unlawful. For purposes of this Agreement, a “director” of the Corporation includes any person (a) who is or was a director of the Corporation, (b) who is or was
serving at the request of the Corporation as a director of another foreign or domestic corporation, partnership, joint venture, trust or other enterprise or (c) who was a director of a corporation which was a predecessor corporation of the
Corporation or of another enterprise at the request of such predecessor corporation. 
 3. Indemnification Arising out of Action By or In
the Right of the Corporation. The Corporation shall indemnify Indemnitee if Indemnitee was or is a party or is threatened to be made a party to any threatened, pending or completed Proceeding or action by or in the right of the Corporation to
procure a judgment in its favor by reason of the fact that Indemnitee is or was an Agent, against Expenses actually and reasonably incurred by Indemnitee in connection with the investigation, defense, settlement, or appeal of such action if
Indemnitee acted in good faith, in a manner Indemnitee believed to be in the best interests of the Corporation and its shareholders; except that no indemnification shall be made under this Section 3 for any of the following: 

(i) In respect of any claim, issue or matter as to which Indemnitee shall have been adjudged to be liable to the Corporation in
the performance of Indemnitee’s duty to the Corporation and its shareholders, unless and only to the extent that the court in which such proceeding is or was pending shall determine upon application that, in view of all the circumstances of the
case, Indemnitee is fairly and reasonably entitled to indemnity for the expenses which such court shall determine; 
 (ii) Of
amounts paid in settling or otherwise disposing of a pending action without court approval; or 
 (iii) Of expenses incurred
in defending a pending action which is settled or otherwise disposed of without court approval. 
 4. Scope of Indemnification.
Notwithstanding Sections 2 and 3 above, and subject to Section 9 below and the last sentence of this Section 4, the Corporation hereby agrees to hold harmless and indemnify Indemnitee to the maximum extent authorized or permitted by the
provisions of the Code and other applicable law and the Articles of Incorporation and Bylaws of the Corporation. The indemnification under Sections 2 and 3, and under the preceding sentence of this Section 4, shall be made to the maximum extent
and in the manner permitted in the Code and other applicable law and the Articles of Incorporation and Bylaws of the Corporation in effect on the date hereof or as such Code, law, Articles of Incorporation, or Bylaws may from

  
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time to time be amended (but, in the case of any such amendment, only to the extent such amendment permits the Corporation to provide broader indemnification rights than such Code, law, Articles
of Incorporation, or Bylaws permitted the Corporation to provide before such amendment). The right to indemnification conferred herein and in the Articles of Incorporation and Bylaws shall be presumed to have been relied upon by Indemnitee in
serving or continuing to serve the Corporation as an Agent and shall be enforceable as a contract right. In addition to, and not as a limitation of, the foregoing, the rights of indemnification of Indemnitee provided under this Agreement shall
include those rights set forth in Sections 5, 8, and 11 below. Notwithstanding the foregoing, the Corporation shall be required to indemnify Indemnitee in connection with a Proceeding commenced by Indemnitee (other than a Proceeding commenced
by Indemnitee to enforce Indemnitee’s rights under this Agreement) only if the commencement of such Proceeding was authorized by the Board of Directors. 

5. Advancement of Expenses. All reasonable Expenses incurred by or on behalf of Indemnitee (including attorneys fees and costs of
enforcement of this Agreement) shall be advanced from time to time by the Corporation to Indemnitee within thirty (30) days after the receipt by the Corporation of a written request for an advance of Expenses, whether prior to or after final
disposition of a Proceeding (except to the extent that there has been a Final Adverse Determination (as hereinafter defined) that Indemnitee is not entitled to be indemnified for such Expenses), including, without limitation, any Proceeding brought
by or in the right of the Corporation. The written request for an advancement of any and all Expenses under this paragraph shall contain reasonable detail of the Expenses incurred by Indemnitee. In the event that such written request shall be
accompanied by an affidavit of counsel to Indemnitee to the effect that such counsel has reviewed such Expenses and that such Expenses are reasonable in such counsel’s view, then such expenses shall be deemed reasonable in the absence of clear
and convincing evidence to the contrary. By execution of this Agreement, Indemnitee hereby makes and shall be deemed hereafter to have made whatever undertaking as may be required by law at the time of any advancement of Expenses with respect to
repayment to the Corporation of such Expenses; such undertaking, for example, may be to repay such advances if it shall be determined ultimately that Indemnitee is not entitled to be indemnified as authorized in this Agreement. In the event that the
Corporation shall breach its obligation to advance Expenses under this Section 5, the parties hereto agree that Indemnitee’s remedies available at law would not be adequate and that Indemnitee would be entitled to specific performance.

 Notwithstanding the other provisions of this Section 5, to the extent that an Agent has been successful on the merits in a defense of
any proceeding, claim, issue or matter referred to in Subsections 2 or 3, such Agent shall be indemnified against all Expenses actually and reasonably incurred by the Agent in connection therewith. 

6. Presumptions and Effect of Certain Proceedings. Upon making a request for indemnification, Indemnitee shall be presumed to be
entitled to indemnification under this Agreement rebuttable by a preponderance of the evidence and the Corporation shall have the burden of proof to overcome that presumption in reaching any contrary determination. The termination of any Proceeding
by judgment, order, settlement, arbitration award or conviction, or upon a plea of nolo contendere or its equivalent shall not affect this presumption or, except as determined by a judgment or other final adjudication adverse to Indemnitee,
establish a presumption with regard to any factual matter relevant to determining Indemnitee’s rights to 

  
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indemnification hereunder. If the person or persons so empowered to make a determination pursuant to Section 8 hereof shall have failed to make the requested determination within ninety
(90) days after any judgment, order, settlement, dismissal, arbitration award, conviction, acceptance of a plea of nolo contendere or its equivalent, or other disposition or partial disposition of any Proceeding or any other event that could
enable the Corporation to determine Indemnitee’s entitlement to indemnification, the requisite determination that Indemnitee is entitled to indemnification shall be deemed to have been made. 

7. Indemnification under Section 204(a)(11) of the Code. Subject to the provisions of Section 204(a)(11) of the Code and any
other applicable law, notwithstanding any other provisions of this Agreement, the following shall apply to the indemnification of Agents under this Agreement: 

(a) The Corporation shall indemnify a person pursuant to this Section 7 if the Corporation would be required to indemnify such person
pursuant to Sections 2, 3, or 4 if the phrase “in a manner such person reasonably believed to be in the best interests of the Corporation” is replaced with the phrase “in a manner such person did not believe to be contrary to the
best interests of the Corporation.” If, pursuant to Section 9, the person making the Section 2, 3 and/or 4 conduct standard determination determines that such standard has not been satisfied, such person shall also determine whether
this Section 7(a) conduct standard has been satisfied; 
 (b) There shall be a presumption that the Agent met the applicable standard of
conduct required to be met in either Section 2, 3, 4, or 7(a) for indemnification of the Agent, rebuttable by clear and convincing evidence to the contrary; 

(c) The Corporation shall have the burden of proving that the Agent did not meet the applicable standard of conduct in either Section 2,
3, 4, or 7(a); 
 (d) In addition to the methods provided for in Section 8(b), a determination that indemnification is proper in the
circumstances because that Agent met the applicable standard of conduct may also be made by a panel of three arbitrators, one selected by the Corporation, another by Indemnitee, and the third by the first two arbitrators; or if for any reason three
arbitrators are not selected within thirty (30) days after the appointment of the first arbitrator, then selection of additional arbitrators shall be made by the American Arbitration Association. If any arbitrator resigns or is unable to serve
in such capacity for any reason, the American Arbitration Association shall select such arbitrator’s replacement. The arbitration shall be conducted pursuant to the commercial arbitration rules of the American Arbitration Association then in
effect. 
 (e) Unless otherwise agreed to in writing between an Agent and the Corporation in any specific case, indemnification may be made
under Section 2 and 4 for amounts paid and expenses incurred in settling or otherwise disposing of a pending action without court approval. 

  
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 8. Procedure for Determination of Entitlement to Indemnification. 

(a) Whenever Indemnitee believes that Indemnitee is entitled to indemnification pursuant to this Agreement, Indemnitee shall submit a written
request for indemnification to the Corporation. Any request for indemnification shall include sufficient documentation or information reasonably available to Indemnitee for the determination of entitlement to indemnification. In any event,
Indemnitee shall submit Indemnitee’s claim for indemnification within a reasonable time, not to exceed five (5) years after any judgment, order, settlement, dismissal, arbitration award, conviction, acceptance of a plea of nolo contendere
or its equivalent, or final determination, whichever is the later date for which Indemnitee requests indemnification. The Secretary or other appropriate officer shall, promptly upon receipt of Indemnitee’s request for indemnification, advise
the Board of Directors in writing that Indemnitee has made such request. Determination of Indemnitee’s entitlement to indemnification shall be made not later than ninety (90) days after the Corporation’s receipt of Indemnitee’s
written request for such indemnification, provided that any request for indemnification for Liabilities, other than amounts paid in settlement, shall have been made after a determination thereof in a Proceeding. 

(b) The Corporation shall be entitled to select the forum in which Indemnitee’s entitlement to indemnification will be heard; provided,
however, that if there is a Change in Control of the Corporation, Independent Legal Counsel (as hereinafter defined) shall determine whether Indemnitee is entitled to indemnification. The forum shall be any one of the following: 

(i) the shareholders of the Corporation by the affirmative vote of a majority of the shares entitled to vote represented at a
duly held meeting at which a quorum is present or by the written consent of shareholders as provided in the Corporation’s Bylaws, with the shares owned by Indemnitee not being entitled to vote thereon; 

(ii) a majority vote of Disinterested Directors (as hereinafter defined), constituting a quorum; 

(iii) Independent Legal Counsel, whose determination shall be made in a written opinion; or 

(iv) The court in which such proceeding is or was pending upon application made by the Corporation or its Agent or attorney or
other person rendering services in connection with the defense, whether or not such application by the Agent, attorney or other person is opposed by the Corporation. 

9. Specific Limitations on Indemnification. Notwithstanding anything in this Agreement to the contrary, the Corporation shall not be
obligated under this Agreement to make any payment to Indemnitee with respect to any Proceeding: 
 (a) To the extent that payment is
actually made to Indemnitee under any insurance policy, or is made to Indemnitee by the Corporation or an affiliate otherwise than pursuant to this Agreement. Notwithstanding the availability of such insurance, Indemnitee also may claim
indemnification from the Corporation pursuant to this Agreement by assigning to the Corporation any claims under such insurance to the extent Indemnitee is paid by the Corporation; 

(b) Provided there has been no Change in Control, for Liabilities in connection with Proceedings settled without the Corporation’s
consent, which consent, however, shall not be unreasonably withheld; 

  
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 (c) For an accounting of profits made from the purchase or sale by Indemnitee of securities of
the Corporation within the meaning of Section 16(b) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or similar provisions of any state statutory or common law; or 

(d) To the extent it would be otherwise prohibited by law, if so established by a judgment or other final adjudication adverse to Indemnitee.

 10. Fees and Expenses of Independent Legal Counsel or Arbitrators. The Corporation agrees to pay the reasonable fees and expenses
of Independent Legal Counsel or a panel of three arbitrators should such Independent Legal Counsel or such arbitrators be retained to make a determination of Indemnitee’s entitlement to indemnification pursuant to Section 8(b) of this
Agreement, and to fully indemnify such Independent Legal Counsel or arbitrators against any and all expenses and losses incurred by any of them arising out of or relating to this Agreement or their engagement pursuant hereto. 

11. Remedies of Indemnitee. 

(a) In the event that (i) a determination pursuant to Section 8 hereof is made that Indemnitee is not entitled to indemnification,
(ii) advances of Expenses are not made pursuant to this Agreement, (iii) payment has not been timely made following a determination of entitlement to indemnification pursuant to this Agreement, or (iv) Indemnitee otherwise seeks
enforcement of this Agreement, Indemnitee shall be entitled to a final adjudication in the courts of the State of California of the remedy sought. Alternatively, unless (y) the determination was made by a panel of arbitrators pursuant to
Section 7(d) hereof, or (z) court approval is required by law for the indemnification sought by Indemnitee, Indemnitee at Indemnitee’s option may seek an award in arbitration to be conducted by a single arbitrator pursuant to the
commercial arbitration rules of the American Arbitration Association now in effect, which award is to be made within ninety (90) days following the filing of the demand for arbitration. The Corporation shall not oppose Indemnitee’s right
to seek any such adjudication or arbitration award. In any such proceeding or arbitration, Indemnitee shall be presumed to be entitled to indemnification and advancement of Expenses under this Agreement and the Corporation shall have the burden of
proof to overcome that presumption. 
 (b) In the event that a determination that Indemnitee is not entitled to indemnification, in
whole or in part, has been made pursuant to Section 8 hereof, the decision in the judicial proceeding or arbitration provided in paragraph (a) of this Section 11 shall be made de novo and Indemnitee shall not be prejudiced by
reason of a determination that Indemnitee is not entitled to indemnification. 
 (c) If a determination that Indemnitee is entitled to
indemnification has been made pursuant to Section 8 hereof, or is deemed to have been made pursuant to Section 6 hereof or otherwise pursuant to the terms of this Agreement, the Corporation shall be bound by such determination in the
absence of a misrepresentation or omission of a material fact by Indemnitee in connection with such determination. 

  
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 (d) The Corporation shall be precluded from asserting that the procedures and presumptions of
this Agreement are not valid, binding and enforceable. The Corporation shall stipulate in any such court or before any such arbitrator that the Corporation is bound by all of the provisions of this Agreement and is precluded from making any
assertion to the contrary. 
 (e) Expenses reasonably incurred by Indemnitee in connection with Indemnitee’s request for indemnification
under, seeking enforcement of or to recover damages for breach of this Agreement shall be borne by the Corporation when and as incurred by Indemnitee irrespective of any Final Adverse Determination that Indemnitee is not entitled to indemnification.

 12. Contribution. To the fullest extent permissible under applicable law, if the indemnification provided for in this Agreement is
unavailable to Indemnitee for any reason whatsoever, the Corporation, in lieu of indemnifying Indemnitee, shall contribute to the amount incurred by Indemnitee, whether for judgments, fines, penalties, excise taxes, amounts paid or to be paid in
settlement and/or for Expenses, in connection with any claim relating to an indemnifiable event under this Agreement, in such proportion as is deemed fair and reasonable in light of all of the circumstances of such Proceeding in order to reflect
(i) the relative benefits received by the Corporation and Indemnitee as a result of the event(s) and/or transaction(s) giving cause to such Proceeding; and/or (ii) the relative fault of the Corporation (and its directors, officers,
employees and agents) and Indemnitee in connection with such event(s) and/or transaction(s). 
 13. Maintenance of Insurance. Upon the
Corporation’s purchase of directors’ and officers’ liability insurance policies covering its directors and officers, then, subject only to the provisions within this Section 13, the Corporation agrees that so long as Indemnitee
shall have consented to serve or shall continue to serve as a director or officer of the Corporation, or both, or as an Agent of the Corporation, and thereafter so long as Indemnitee shall be subject to any possible Proceeding (such periods being
hereinafter sometimes referred to as the “Indemnification Period”), the Corporation will use all reasonable efforts to maintain in effect for the benefit of Indemnitee one or more valid, binding and enforceable policies of directors’
and officers’ liability insurance from established and reputable insurers, providing, in all respects, coverage both in scope and amount which is no less favorable than that provided by such preexisting policies. Notwithstanding the foregoing,
the Corporation shall not be required to maintain said policies of directors’ and officers’ liability insurance during any time period if during such period such insurance is not reasonably available or if it is determined in good faith by
the then directors of the Corporation either that: 
 (a) The premium cost of maintaining such insurance is substantially disproportionate to
the amount of coverage provided thereunder; or 
 (b) The protection provided by such insurance is so limited by exclusions, deductions or
otherwise that there is insufficient benefit to warrant the cost of maintaining such insurance. 
 Anything in this Agreement to the contrary
notwithstanding, to the extent that and for so long as the Corporation shall choose to continue to maintain any policies of directors’ and officers’ liability insurance during the Indemnification Period, the Corporation shall maintain
similar and equivalent insurance for the benefit of Indemnitee during the Indemnification Period (unless such insurance shall be less favorable to Indemnitee than the Corporation’s existing policies). 

  
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 14. Modification, Waiver, Termination and Cancellation. No supplement, modification,
termination, cancellation or amendment of this Agreement shall be binding unless executed in writing by both of the parties hereto. No waiver of any of the provisions of this Agreement shall be deemed or shall constitute a waiver of any other
provisions hereof (whether or not similar), nor shall such waiver constitute a continuing waiver. 
 15. Subrogation. In the event of
payment under this Agreement, the Corporation shall be subrogated to the extent of such payment to all of the rights of recovery of Indemnitee, who shall execute all papers required and shall do everything that may be necessary to secure such
rights, including the execution of such documents necessary to enable the Corporation effectively to bring suit to enforce such rights. 

16. Optional Means of Assuring Payment. Upon request by an Agent certifying that the Agent has reasonable grounds to believe the Agent
may be made a party to a proceeding for which the Agent may be entitled to be indemnified under this Agreement, the Corporation may create a trust fund, grant a security interest or use other means (including, without limitation, a letter of credit)
to ensure the payment of such sums as may become necessary to effect indemnification as provided herein. 
 17. Notice by Indemnitee and
Defense of Claim. Indemnitee shall promptly notify the Corporation in writing upon being served with any summons, citation, subpoena, complaint, indictment, information or other document relating to any matter, whether civil, criminal,
administrative or investigative, but the omission so to notify the Corporation will not relieve it from any liability that it may have to Indemnitee if such omission does not prejudice the Corporation’s rights. If such omission does prejudice
the Corporation’s rights, the Corporation will be relieved from liability only to the extent of such prejudice. Notwithstanding the foregoing, such omission will not relieve the Corporation from any liability that it may have to Indemnitee
otherwise than under this Agreement. With respect to any Proceeding as to which Indemnitee notifies the Corporation of the commencement thereof: 

(a) The Corporation will be entitled to participate therein at its own expense; and 

(b) The Corporation jointly with any other indemnifying party similarly notified will be entitled to assume the defense thereof, with counsel
reasonably satisfactory to Indemnitee; provided, however, that the Corporation shall not be entitled to assume the defense of any Proceeding if there has been a Change in Control or if Indemnitee shall have reasonably concluded that there may be a
conflict of interest between the Corporation and Indemnitee with respect to such Proceeding. After notice from the Corporation to Indemnitee of its election to assume the defense thereof, the Corporation will not be liable to Indemnitee under this
Agreement for any Expenses subsequently incurred by Indemnitee in connection with the defense thereof, other than reasonable costs of investigation or as otherwise provided below. Indemnitee shall have the right to employ Indemnitee’s own
counsel in such Proceeding, but the fees and expenses of such counsel incurred after notice from the Corporation of its assumption of the defense thereof shall be at the expense of Indemnitee unless:

  
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 (i) the employment of counsel by Indemnitee has been authorized by the
Corporation; 
 (ii) Indemnitee shall have reasonably concluded that counsel engaged by the Corporation may not adequately
represent Indemnitee due to, among other things, actual or potential differing interests; or 
 (iii) the Corporation shall
not in fact have employed counsel to assume the defense in such Proceeding or shall not in fact have assumed such defense and be acting in connection therewith with reasonable diligence; 

in each of which cases the fees and expenses of such counsel shall be at the expense of the Corporation. 

(c) The Corporation shall not settle any Proceeding in any manner that would impose any penalty or limitation on Indemnitee without
Indemnitee’s written consent; provided, however, that Indemnitee will not unreasonably withhold his or her consent to any proposed settlement. 

18. Notices. All notices, requests, demands and other communications hereunder shall be in writing and shall be deemed to have been duly
given if (i) delivered by hand and receipted for by the party to whom said notice or other communication shall have been directed, (ii) delivered by facsimile with facsimile, email, or other written confirmation of receipt, (iii) sent
by email with facsimile, email or other written confirmation of receipt, or (iv) mailed by certified or registered mail with postage prepaid, on the third business day after the date on which it is so mailed: 

(a) If to Indemnitee, to the address, facsimile number, or email address set forth on the signature page hereto; 

(b) If to the Corporation, to the address, facsimile number, or email address set forth on the signature page hereto; 

or to such other address, facsimile number, or email address as may have been furnished to Indemnitee by the Corporation or to the Corporation by Indemnitee,
as the case may be. 
 19. Nonexclusivity. The rights of Indemnitee hereunder shall not be deemed exclusive of any other rights to
which Indemnitee may be entitled under applicable law, the Corporation’s Articles of Incorporation or bylaws, or any agreements, vote of shareholders, resolution of the Board of Directors or otherwise, and to the extent that during the
Indemnification Period the rights of the then existing directors and officers are more favorable to such directors or officers than the rights currently provided to Indemnitee thereunder or under this Agreement, Indemnitee shall be entitled to the
full benefits of such more favorable rights. 

  
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 20. Certain Definitions. 

(a) “Agent” shall mean any person who is or was a director, officer, employee or other agent of the Corporation, or is or was
serving at the request of the Corporation as a director, officer, employee or agent of another foreign or domestic corporation, partnership, joint venture, trust or other enterprise, or was a director, officer, employee or agent of a foreign or
domestic corporation which was a predecessor corporation of the Corporation or of another enterprise at the request of such predecessor corporation; 

(b) “Change in Control” shall mean the occurrence of any of the following: 

(i) Both (A) any “person” (as defined below) is or becomes the “beneficial owner” (as defined in Rule 13d-3 under the Exchange Act), directly or indirectly, of securities of the Corporation representing at least twenty percent (20%) of the total voting power represented by the Corporation’s then
outstanding voting securities; and (B) the beneficial ownership by such person of securities representing such percentage has not been approved by a majority of the “continuing directors” (as defined below); 

(ii) Any “person” is or becomes the “beneficial owner” (as defined in
Rule 13d-3 under the Exchange Act), directly or indirectly, of securities of the Corporation representing at least fifty percent (50%) of the total voting power represented by the Corporation’s
then outstanding voting securities; 
 (iii) A change in the composition of the Board of Directors occurs, as a result of
which fewer than two-thirds (2/3) of the incumbent directors are directors who either
(A) had been directors of the Corporation on the “look-back date” (as defined below) (the “Original Directors”) or (B) were elected, or nominated for election, to the Board of Directors with the affirmative votes of at
least a majority in the aggregate of the Original Directors who were still in office at the time of the election or nomination and directors whose election or nomination was previously so approved (the “continuing directors”); 

(iv) The shareholders of the Corporation approve a merger or consolidation of the Corporation with any other corporation, if
such merger or consolidation would result in the voting securities of the Corporation outstanding immediately prior thereto representing (either by remaining outstanding or by being converted into voting securities of the surviving entity) fifty
percent (50%) or less of the total voting power represented by the voting securities of the Corporation or such surviving entity outstanding immediately after such merger or consolidation; or 

(v) The shareholders of the Corporation approve (A) a plan of complete liquidation of the Corporation or (B) an
agreement for the sale or disposition by the Corporation of all or substantially all of the Corporation’s assets. 
 For purposes of
Subsection (i) above, the term “person” shall have the same meaning as when used in Sections 13(d) and 14(d) of the Exchange Act, but shall exclude (x) a trustee or other fiduciary holding securities under an employee
benefit plan of the Corporation or of a parent or subsidiary of the Corporation or (y) a corporation owned directly or indirectly by the shareholders of the Corporation in substantially the same proportions as their ownership of the common
stock of the Corporation. 

  
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 For purposes of Subsection (iii) above, the term “look-back date” shall mean the
later of (x) the Effective Date and (y) the date 24 months prior to the date of the event that may constitute a “Change in Control.” 

Any other provision of this Section 20(b) notwithstanding, the term “Change in Control” shall not include a transaction, if
undertaken at the election of the Corporation, the result of which is to sell all or substantially all of the assets of the Corporation to another corporation (the “surviving corporation”); provided that the surviving corporation is owned
directly or indirectly by the shareholders of the Corporation immediately following such transaction in substantially the same proportions as their ownership of the Corporation’s common stock immediately preceding such transaction; and
provided, further, that the surviving corporation expressly assumes this Agreement. 
 (c) “Code” shall mean the California
Corporations Code, as amended. 
 (d) “Disinterested Director” shall mean a director of the Corporation who is not or was
not a party to or otherwise involved in the Proceeding in respect of which indemnification is being sought by Indemnitee. 
 (e)
“Expenses” shall include all direct and indirect costs (including, without limitation, attorneys’ fees, retainers, court costs, transcripts, fees of experts, witness fees, travel expenses, duplicating costs, printing and
binding costs, telephone charges, postage, delivery service fees, all other disbursements or out-of-pocket expenses and reasonable compensation for time spent by Indemnitee for which Indemnitee is otherwise not compensated by the Corporation or any
third party) actually and reasonably incurred in connection with either the investigation, defense, settlement or appeal of a Proceeding or establishing or enforcing a right to indemnification under this Agreement, applicable law or otherwise;
provided, however, that “Expenses” shall not include any Liabilities. 
 (f) “Final Adverse Determination” shall
mean that a determination that Indemnitee is not entitled to indemnification shall have been made pursuant to Section 8 hereof and either (1) a final adjudication in the courts of the State of California or decision of an arbitrator
pursuant to Section 11(a) hereof shall have denied Indemnitee’s right to indemnification hereunder, or (2) Indemnitee shall have failed to file a complaint in a California court or seek an arbitrator’s award pursuant to
Section 11(a) for a period of one hundred twenty (120) days after the determination made pursuant to Section 5 hereof. 
 (g)
“Independent Legal Counsel” shall mean a law firm or a member of a firm selected by the Corporation and approved by Indemnitee (which approval shall not be unreasonably withheld) or, if there has been a Change in Control, selected
by Indemnitee and approved by the Corporation (which approval shall not be unreasonably withheld), that neither is presently nor in the past five (5) years has been retained to represent: (i) the Corporation or any of its subsidiaries or
affiliates, or Indemnitee or any corporation of which Indemnitee was or is a director, officer, employee or agent, or any subsidiary or affiliate of such a corporation, in any 

  
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material matter, or (ii) any other party to the Proceeding giving rise to a claim for indemnification hereunder. Notwithstanding the foregoing, the term “Independent Legal Counsel”
shall not include any person who, under the applicable standards of professional conduct then prevailing, would have a conflict of interest in representing either the Corporation or Indemnitee in an action to determine Indemnitee’s right to
indemnification under this Agreement. 
 (h) “Liabilities” shall mean liabilities of any type whatsoever including, but not
limited to, any judgments, fines, ERISA excise taxes and penalties, penalties and amounts paid in settlement (including all interest assessments and other charges paid or payable in connection with or in respect of such judgments, fines, penalties
or amounts paid in settlement) of any Proceeding. 
 (i) “Proceeding” shall mean any threatened, pending or completed
action, claim, suit, arbitration, alternate dispute resolution mechanism, investigation, administrative hearing or any other proceeding whether civil, criminal, administrative or investigative, that is associated with Indemnitee’s being an
Agent of the Corporation. 
 21. Binding Effect; Duration and Scope of Agreement. This Agreement shall be binding upon and inure to
the benefit of and be enforceable by the parties hereto and their respective successors and assigns (including any direct or indirect successor by purchase, merger, consolidation or otherwise to all or substantially all of the business or assets of
the Corporation), spouses, heirs and personal and legal representatives. This Agreement shall continue in effect during the Indemnification Period, regardless of whether Indemnitee continues to serve as an Agent. 

22. Severability. If any provision or provisions of this Agreement (or any portion thereof) shall be held to be invalid, illegal or
unenforceable for any reason whatsoever: 
 (a) the validity, legality and enforceability of the remaining provisions of this Agreement shall
not in any way be affected or impaired thereby; and 
 (b) to the fullest extent legally possible, the provisions of this Agreement shall be
construed so as to give effect to the intent of any provision held invalid, illegal or unenforceable. 
 23. Governing Law. This
Agreement shall be governed by and construed and enforced in accordance with the laws of the State of California, as applied to contracts between California residents entered into and to be performed entirely within the State of California, without
regard to conflict of laws rules. 
 24. Consent to Jurisdiction. The Corporation and Indemnitee each irrevocably consent to the
jurisdiction of the courts of the State of California for all purposes in connection with any action or proceeding that arises out of or relates to this Agreement and agree that any action instituted under this Agreement shall be brought only in the
state courts of the State of California. 
 25. Entire Agreement. This Agreement represents the entire agreement between the parties
hereto, and there are no other agreements, contracts or understandings between the parties hereto with respect to the subject matter of this Agreement, except as specifically referred to herein or as provided in Section 19 hereof. 

  
 -12- 

 26. Counterparts; Facsimile Signatures. This Agreement may be executed in one or more
counterparts, any of which may be returned by facsimile, and each of which shall for all purposes be deemed to be an original, but all of which together shall constitute one and the same Agreement. Indemnitee shall deliver to the Corporation the
original signature copy by express overnight delivery. However, the failure to deliver the original signature copy and/or the nonreceipt of the original signature copy shall have no effect upon the binding and enforceable nature of this Agreement.

 [Remainder of Page Left Intentionally Blank] 

  
 -13- 

 Authorized Signatures 

In order to bind themselves to this Agreement, the Corporation has caused this Agreement to be executed by a duly authorized officer and
Indemnitee has executed this Agreement on the dates indicated below to be effective as of the Effective Date. 
  

	
	Supertex, Inc.,
	a California corporation
	
	By:                                     
                                         
                  
	
	Print
Name:                                        
                                       
	
	Title:                                     
                                         
              
	
	Address: 1235 Bordeaux Drive
	                Sunnyvale, California 94089
	
	Telephone
Number:                                        
                        
	
	Facsimile
Number:                                        
                          
	
	Email
Address:                                       
                                  
	
	Date Executed:                  , 20    
	
	INDEMNITEE
	
	By:                                     
                                         
                  
	
	Print
Name:                                        
                                       
	
	Address:                                     
                                         
        
	                                      
                                         
                     
	
	Telephone:                                    
                                         
    
	
	Facsimile:                                    
                                         
      
	
	E-mail:                              
                                         
                 
	
	Date Executed:                  , 20    

  
 -14-EX-10.11

 Exhibit 10.11 

AMENDMENT TO THE 
 2009
EQUITY INCENTIVE PLAN 
 OF SUPERTEX, INC. 

This amendment amends the 2009 Equity Incentive Plan (the “Plan”) of Supertex, Inc., a California corporation (the
“Company”), as amended to date. Unless otherwise specifically defined herein, each capitalized term used herein shall have the meaning afforded such term under the Plan. 

W I T N E S S E T H: 

WHEREAS, pursuant to Section 19(b) of the Plan, the Board of Directors of the Company (the “Board of
Directors”) may amend the Plan; and 
 WHEREAS, pursuant to resolutions duly adopted by the Board of Directors effective as
of February 7, 2014, the Board of Directors determined it to be in the best interests of the Company to confirm, approve and adopt an amendment to the Plan that provides for full acceleration upon a “Change of Control” of the non-statutory
stock options automatically granted to each “Outside Director” upon the first business day following his or her initial election or appointment to the Board and thereafter upon the first business day following the conclusion of each
regular annual meeting of the Company’s shareholders (with the terms in quotation marks as defined in the Plan) . 
 NOW,
THEREFORE, BE IT RESOLVED that the Plan is hereby amended as follows: 
  

	 	1.	The last sentence of Section 4(b)(iii) shall be amended and replaced in its entirety with the following: 

“Notwithstanding the foregoing, each such Option shall become vested in full if a Change in Control occurs with respect to
the Company during the Optionee’s Service.” 
  

	 	2.	To record the adoption of this Amendment to the Plan by the Board of Directors as of the date set forth in the recitals above, the Company has caused its authorized officer to execute the same. 

 

	
	 SUPERTEX, INC.,
  

a California corporation

	
	/s/ Henry C. Pao
	Henry C. Pao, Chief Executive Officer

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