EX-10.10




 Exhibit 10.10 

HORTONWORKS, INC. 

2014 EMPLOYEE STOCK PURCHASE PLAN 

(As Amended and Restated on March 3, 2015) 

The purpose of the Hortonworks, Inc. 2014 Employee Stock Purchase Plan (“the Plan”) is to provide eligible employees
of Hortonworks, Inc. (the “Company”) and each Designated Company (as defined in Section 13) with opportunities to purchase shares of the Company’s common stock, par value $0.0001 per share (the “Common Stock”).
2,500,000 shares of Common Stock in the aggregate have been approved and reserved for this purpose, plus on January 1, 2015 and each January 1 thereafter, the number of shares of Stock reserved and available for issuance under the Plan
shall be cumulatively increased by the lesser of (i) 1,000,000 shares of Stock; (ii) 1 percent (1%) of the number of shares of Stock issued and outstanding on the immediately preceding December 31 or (iii) such lesser number
of shares as determined by the Administrator (the “Annual Increase”). 
 The Plan contains two components: a Code
Section 423 Component (the “423 Component”) and a non-Code Section 423 Component (the “Non-423 Component”). It is intended for the 423 Component to constitute an “employee stock purchase plan” within the
meaning of Section 423(b) of the Internal Revenue Code of 1986, as amended (the “Code”), and the 423 Component shall be interpreted in accordance with that intent. In addition, the Plan authorizes the grant of options under the
Non-423 Component that do not qualify as an “employee stock purchase plan” under Section 423 of the Code because of deviations necessary to permit participation in the Plan by non-U.S. employees, while complying with applicable
non-US. Law. Except as otherwise provided herein, the Non-423 Component will operate and be administered in the same manner as the 423 Component. 








 1. Administration. The Plan will be administered by the Compensation
Committee of the Board of Directors and/or such other person or persons (the “Administrator”) appointed by the Company’s Board of Directors (the “Board”) for such purpose. The Administrator has authority at any time to:
(i) adopt, alter and repeal such rules, guidelines and practices for the administration of the Plan and for its own acts and proceedings as it shall deem advisable including to accommodate the specific requirements of local laws for
jurisdictions outside the United States; (ii) interpret the terms and provisions of the Plan; (iii) make all determinations it deems advisable for the administration of the Plan; (iv) decide all disputes arising in connection with the
Plan; and (v) otherwise supervise the administration of the Plan. All interpretations and decisions of the Administrator shall be binding on all persons, including the Company and the Participants. No member of the Board or individual
exercising administrative authority with respect to the Plan shall be liable for any action or determination made in good faith with respect to the Plan or any option granted hereunder. 

2. “Offering” means an offer under the Plan of an option that may be exercised on an Exercise Date (as
defined in Section 10) as further described in this Plan. For purposes of the Plan, the Administrator may designate separate Offerings under the Plan (the terms of which need not be identical) in which Employees of the Company and/or any
Designated Company will participate, even if the dates of the applicable Offering Periods of each such Offering are identical, and the provisions of the Plan will separately apply to each Offering. To the extent permitted by U.S. Treasury Regulation
Section 1.423-2(a)(1), the terms of each Offering need not be identical provided that the terms of the Plan and an Offering under the 423 Component together satisfy U.S. Treasury Regulation Section 1.423-2(a)(2) and (a)(3). 

  
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 3. “Offering Periods” means the period of no more than
approximately twelve (12) months commencing on the first business day on or after March 11th and September 11th of each year and terminating on the last business day on or before March 10th and September 10th ,
approximately twelve (12) months later. The duration and timing of Offering Periods may be changed as designated by the Administrator provided that no Offering may exceed 27 months in duration. Unless the Administrator determines otherwise,
each Offering Period will be divided into two equal six month Purchase Periods. 
 4. Automatic Transfer to Low Price
Offering Period. To the extent permitted by applicable laws, if the Fair Market Value of the Common Stock on any Exercise Date in an Offering Period is lower than the Fair Market Value of the Common Stock on the Offering Date of such
Offering Period, then all Participants in such Offering Period automatically will be withdrawn from such Offering Period immediately after the exercise of their option on such Exercise Date and will be automatically re-enrolled in the immediately
following Offering Period as of the first day thereof. 
 5. Eligibility. All individuals classified as employees on
the payroll records of the Company and each Designated Company are eligible to participate in any one or more of the Offerings under the Plan, provided that as of the first day of the applicable Offering Period (the “Offering Date”) they
are customarily employed by the Company or a Designated Company for more than 20 hours a week and have completed at least three months of employment. Notwithstanding any other provision herein, individuals who are not contemporaneously classified as
employees of the Company or a Designated Company for purposes of the Company’s or applicable Designated Company’s payroll system are not considered to be eligible employees of the Company or any Designated Company and shall not be eligible
to participate in 

  
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the Plan. In the event any such individuals are reclassified as employees of the Company or a Designated Company for any purpose, including, without limitation, common law or statutory employees,
by any action of any third party, including, without limitation, any government agency, or as a result of any private lawsuit, action or administrative proceeding, such individuals shall, notwithstanding such reclassification, remain ineligible for
participation. Notwithstanding the foregoing, the exclusive means for individuals who are not contemporaneously classified as employees of the Company or a Designated Company on the Company’s or Designated Company’s payroll system to
become eligible to participate in this Plan is through an amendment to this Plan, duly executed by the Company, which specifically renders such individuals eligible to participate herein. 

6. Participation. 

(a) An eligible employee who is not a Participant on any Offering Date may participate in such Offering Period by submitting
an enrollment form to his or her appropriate payroll location (or such other procedure as determined by the Administrator) at least 15 business days before the Offering Date (or by such other deadline as shall be established by the Administrator for
the Offering). 
 (b) Enrollment. The enrollment form will (a) state a whole percentage (unless the
Administrator determines in advance of an Offering to require a fixed amount be specified in lieu of a percentage) to be contributed from an eligible employee’s Compensation (as defined in Section 13) per pay period, (b) authorize the
purchase of Common Stock in each Offering Period in accordance with the terms of the Plan and (c) specify the exact name or names in which shares of Common Stock purchased for such individual are to be issued pursuant to Section 12. An
employee who does not enroll in accordance with these procedures will be deemed to have 

  
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waived the right to participate. Unless a Participant files a new enrollment form or withdraws from the Plan, such Participant’s contributions and purchases will continue at the same
percentage of Compensation for future Offerings, provided he or she remains eligible. 
 (c) Notwithstanding the foregoing,
participation in the Plan will neither be permitted nor be denied contrary to the requirements of the Code and any other applicable law. 

7. Employee Contributions. Each eligible employee may authorize payroll deductions at a minimum of 1 percent up to
a maximum of 15 percent of such employee’s Compensation for each pay period. The Company will maintain book accounts showing the amount of payroll deductions made by each Participant for each Purchase Period. No interest will accrue or be
paid on payroll deductions. Notwithstanding the foregoing, to the extent necessary to comply with Section 423(b)(8) of the Code and Section 3(d), a Participant’s payroll deductions may be decreased to zero percent (0%) at any time
during a Purchase Period. Subject to Section 423(b)(8) of the Code and Section 8 hereof, a Participant’s payroll deductions will recommence at the rate originally elected by the Participant effective as of the beginning of the first
Purchase Period scheduled to end in the following calendar year, unless terminated by the Participant as provided in Section 9. 

8. Deduction Changes. Except as may be determined by the Administrator in advance of an Offering Period, a Participant
may not increase or decrease his or her payroll contribution during any Offering Period, but may increase or decrease his or her payroll contribution with respect to the next Offering Period (subject to the limitations of Section 7) by filing a
new enrollment form at least 15 business days before the next Offering Date (or by such other deadline as shall be established by the Administrator for the Offering Period). The Administrator may, in advance of any Offering Period, establish rules
permitting a Participant to increase, decrease or terminate his or her payroll contribution during an Offering Period. 

  
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 9. Withdrawal. A Participant may withdraw from participation in the Plan
by delivering a written notice of withdrawal to his or her appropriate payroll location (or such other manner as determined by the Administrator). The Participant’s withdrawal will be effective as of the next business day. Following a
Participant’s withdrawal, the Company will promptly refund such individual’s entire account balance under the Plan to him or her (after payment for any Common Stock purchased before the effective date of withdrawal). Partial withdrawals
are not permitted. Such an employee may not begin participation again during the remainder of the Offering Period, but may enroll in a subsequent Offering Period in accordance with Section 6. 

10. Grant of Options. On each Offering Date, the Company will grant to each eligible employee who is then a Participant
in the Plan an option (“Option”) to purchase on the last day of each Purchase Period within the Offering Period (an “Exercise Date”), at the Option Price hereinafter provided for, the lowest of (a) a number of shares of
Common Stock determined by dividing such Participant’s accumulated payroll deductions on such Exercise Date by the lower of (i) 85 percent of the Fair Market Value of the Common Stock on the Offering Date, or (ii) 85 percent of the
Fair Market Value of the Common Stock on the Exercise Date, (b) 1,500 shares; or (c) such other lesser maximum number of shares as shall have been established by the Administrator in advance of the Offering Period; provided, however, that
such Option shall be subject to the limitations set forth in the Plan. Each Participant’s Option shall be exercisable only to the extent of such Participant’s accumulated payroll contributions on the applicable Exercise Date. The purchase
price for each share purchased under each Option (the “Option Price”) will be 85 percent of the Fair Market Value of the Common Stock on the Offering Date or the Exercise Date, whichever is less. 

  
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 Notwithstanding the foregoing, no Participant may be granted an option hereunder
if such Participant, immediately after the option was granted, would be treated as owning stock possessing 5 percent or more of the total combined voting power or value of all classes of stock of the Company or any Parent or Subsidiary (as
defined in Section 13). For purposes of the preceding sentence, the attribution rules of Section 424(d) of the Code shall apply in determining the stock ownership of a Participant, and all stock which the Participant has a contractual
right to purchase shall be treated as stock owned by the Participant. In addition, no Participant may be granted an Option which permits his or her rights to purchase stock under the Plan, and any other employee stock purchase plan of the Company
and its Parents and Subsidiaries, to accrue at a rate which exceeds $25,000 of the fair market value of such stock (determined on the option grant date or dates) for each calendar year in which the Option is outstanding at any time. The purpose of
the limitation in the preceding sentence is to comply with Section 423(b)(8) of the Code and shall be applied taking Options into account in the order in which they were granted. 

11. Exercise of Option and Purchase of Shares. Each employee who continues to be a Participant in the Plan on an
Exercise Date shall be deemed to have exercised his or her Option on such date and shall acquire from the Company such number of whole shares of Common Stock reserved for the purpose of the Plan as his or her accumulated payroll contributions on
such date will purchase at the Option Price, subject to any other limitations contained in the Plan. Any amount remaining in a Participant’s account after the purchase of shares on an Exercise Date of an Offering Period solely by reason of the
inability to purchase a fractional share will be carried forward to the next Purchase Period, and, if such Exercise Date is the final Exercise Date 

  
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of an Offering Period, will be carried forward to the next Offering Period; any other balance remaining in a Participant’s account at the end of an Offering Period will be refunded to the
Participant at the earliest convenience of the Administrator. If a Participant has more than one Option outstanding under the Plan, unless he or she otherwise indicates in agreements or notices delivered hereunder: (i) each agreement or notice
delivered by that Participant shall be deemed to apply to all of his or her Options under the Plan, and (ii) an Option with a lower Option Price (or an earlier granted Option, if different Options have identical Option Prices) shall be
exercised to the fullest possible extent before an Option with a higher Option Price (or a later granted Option if different Options have identical Option Prices) shall be exercised. 

12. Issuance of Certificates. Certificates or book entries representing shares of Common Stock purchased under the Plan
may be issued only in the name of the employee, in the name of the employee and another person of legal age as joint tenants with rights of survivorship, or in the name of a broker authorized by the employee to be his, her or their, nominee for such
purpose. 
 13. Definitions. 

The term “Affiliate” means any entity that is directly or indirectly controlled by the Company which does not meet
the definition of a Subsidiary below, as determined by the Administrator, whether now or hereafter existing. 
 The term
“Compensation” means the amount of total cash compensation, prior to salary reduction pursuant to Sections 125, 132(f) or 401(k) of the Code, including base pay, overtime, commissions, and incentive or bonus awards, but excluding
allowances and reimbursements for expenses such as relocation allowances or travel expenses, income or gains on the exercise of Company stock options, and similar items. 

  
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 The term “Designated Company” means any present or future Affiliate or
Subsidiary (as defined below) that has been designated by the Board to participate in the Plan. The Board may so designate any Affiliate or Subsidiary, or revoke any such designation, at any time and from time to time, either before or after the
Plan is approved by the stockholders or may further designate such companies or participants in the 423 Component or the Non-423 Component. For purposes of the 423 Component, only Subsidiaries may be Designated Companies. The current list of
Designated Companies is attached hereto as Appendix A. 
 The term “Fair Market Value of the Common Stock”
on any given date means the fair market value of the Common Stock determined in good faith by the Administrator; provided, however, that if the Common Stock is admitted to quotation on the National Association of Securities Dealers Automated
Quotation System (“NASDAQ”), NASDAQ Global Market or another national securities exchange, the determination shall be made by reference to the closing price on such date. If there is no closing price for such date, the determination shall
be made by reference to the last date preceding such date for which there is a closing price. 
 The term “Parent”
means a “parent corporation” with respect to the Company, as defined in Section 424(e) of the Code. 
 The
term “Participant” means an individual who is eligible as determined in Section 5 and who has complied with the provisions of Section 6. 

The term “Purchase Period” means a six month period of time (or such other period as specified by the Administrator)
beginning on an Offering Date or on the next day following an Exercise Date within an Offering and ending on an Exercise Date. An Offering Period may consist of one or more Purchase Periods. 

  
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 The term “Subsidiary” means a “subsidiary corporation” with
respect to the Company, as defined in Section 424(f) of the Code. 
 14. Rights on Termination of Employment. If
a Participant’s employment terminates for any reason before the Exercise Date for any Offering Period, no payroll deduction will be taken from any pay due and owing to the Participant and the balance in the Participant’s account will be
paid to such Participant or, in the case of such Participant’s death, to his or her designated beneficiary as if such Participant had withdrawn from the Plan under Section 9. An employee will be deemed to have terminated employment, for
this purpose, if the corporation that employs him or her, having been a Designated Company, ceases to be an Affiliate or Subsidiary, or if the employee is transferred to any corporation other than the Company or a Designated Company. An employee
will not be deemed to have terminated employment for this purpose, if the employee is on an approved leave of absence for military service or sickness or for any other purpose approved by the Company, if the employee’s right to reemployment is
guaranteed either by a statute or by contract or under the policy pursuant to which the leave of absence was granted or if the Administrator otherwise provides in writing. 

15. Special Rules. Notwithstanding anything herein to the contrary, the Administrator may adopt special rules
applicable to the employees of a particular Designated Company, whenever the Administrator determines that such rules are necessary or appropriate for the implementation of the Plan in a jurisdiction where such Designated Company has employees. 

16. Optionees Not Stockholders. Neither the granting of an Option to a Participant nor the deductions from his or her
pay shall constitute such Participant a holder of the shares of Common Stock covered by an Option under the Plan until such shares have been purchased by and issued to him or her. 

  
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 17. Rights Not Transferable. Rights under the Plan are not transferable by
a Participant other than by will or the laws of descent and distribution, and are exercisable during the Participant’s lifetime only by the Participant. 

18. Application of Funds. All funds received or held by the Company under the Plan may be combined with other corporate
funds and may be used for any corporate purpose. 
 19. Adjustment in Case of Changes Affecting Common Stock. In the
event of a subdivision of outstanding shares of Common Stock, the payment of a dividend in Common Stock or any other change affecting the Common Stock, the number of shares approved for the Plan and the share limitation set forth in Section 10
shall be equitably or proportionately adjusted to give proper effect to such event. 
 20. Amendment of the Plan. The
Board may at any time and from time to time amend the Plan in any respect, except that without the approval within 12 months of such Board action by the stockholders, no amendment shall be made increasing the number of shares approved for the Plan
or making any other change that would require stockholder approval in order for the 423 Component of the Plan, as amended, to qualify as an “employee stock purchase plan” under Section 423(b) of the Code. 

21. Insufficient Shares. If the total number of shares of Common Stock that would otherwise be purchased on any
Exercise Date plus the number of shares purchased under previous Offerings under the Plan exceeds the maximum number of shares issuable under the Plan, the shares then available shall be apportioned among Participants in proportion to the amount of
payroll deductions accumulated on behalf of each Participant that would otherwise be used to purchase Common Stock on such Exercise Date. 

  
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 22. Termination of the Plan. The Plan may be terminated at any time by the
Board. Upon termination of the Plan, all amounts in the accounts of Participants shall be promptly refunded. The Plan shall automatically terminate on the ten year anniversary of the Company’s initial public offering. 

23. Governmental Regulations. The Company’s obligation to sell and deliver Common Stock under the Plan is subject
to obtaining all governmental approvals required in connection with the authorization, issuance, or sale of such stock. 

24. Governing Law. This Plan and all Options and actions taken thereunder shall be governed by, and construed in
accordance with, the laws of the State of Delaware, applied without regard to conflict of law principles. 
 25. Issuance
of Shares. Shares may be issued upon exercise of an Option from authorized but unissued Common Stock, from shares held in the treasury of the Company, or from any other proper source. 

26. Tax Withholding. Participation in the Plan is subject to any minimum required tax withholding on income of the
Participant in connection with the Plan. Each Participant agrees, by entering the Plan, that the Company and its Affiliates and Subsidiaries shall have the right to deduct any such taxes from any payment of any kind otherwise due to the Participant,
including shares issuable under the Plan. 
 27. Notification Upon Sale of Shares. Each Participant agrees, by
entering the Plan, to give the Company prompt notice of any disposition of shares purchased under the Plan where such disposition occurs within two years after the date of grant of the Option pursuant to which such shares were purchased. 

  
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 28. Effective Date and Approval of Shareholders. The Plan shall take
effect on the date of the Company’s Initial Public Offering, subject to prior approval by the holders of a majority of the votes cast at a meeting of stockholders at which a quorum is present or by written consent of the stockholders. 

  
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 APPENDIX A 

DESIGNATED COMPANIES 

Hortonworks Canada (HWCA) 

  
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