As filed with the Securities and Exchange Commission on April 2, 2019

Registration No. 333-          

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-8

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

JUNIPER NETWORKS, INC.

(Exact name of Registrant as specified in its charter)

1133 Innovation Way

Sunnyvale, California 94089

(Address of Principal Executive Offices) (Zip Code)

Mist Systems, Inc. 2014 Equity Incentive Plan

(Full title of the plan)

Brian M. Martin, Esq.

Senior Vice President, General Counsel and Secretary

Juniper Networks, Inc.

1133 Innovation Way

Sunnyvale, California 94089

(408) 745-2000

(Name, Address, Including Zip Code, and Telephone Number, Including Area Code, of Agent for Service)

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.  ☐

CALCULATION OF REGISTRATION FEE

PART I

INFORMATION REQUIRED IN THE SECTION 10(A) PROSPECTUS

The information specified in Item 1 and Item 2 of Part I of Form S-8 is omitted from this Registration Statement in accordance with the provisions of Rule 428 under the Securities Act of 1933, as amended (the “Securities Act”), and the introductory note to Part I of Form S-8. The documents containing the information specified in Part I of Form S-8 will be delivered to the Mist Plan participants as specified by Rule 428(b)(1) under the Securities Act.

PART II

INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3. Incorporation of Documents by Reference.

The Registrant hereby incorporates by reference into this Registration Statement the following documents previously filed with the Securities and Exchange Commission (the “Commission”):

All documents filed by the Registrant pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act on or after the date of this Registration Statement and prior to the filing of a post-effective amendment to this Registration Statement that indicates that all securities offered have been sold or that deregisters all securities then remaining unsold shall be deemed to be incorporated by reference in this Registration Statement and to be part hereof from the date of filing of such documents; provided, however, that documents or information deemed to have been furnished and not filed in accordance with the rules of the Commission shall not be deemed incorporated by reference into this Registration Statement. Any statement contained in a document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained herein or in any subsequently filed document which also is deemed to be incorporated by reference herein modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Registration Statement.

Item 4. Description of Securities.

Not applicable.

Item 5. Interests of Named Experts and Counsel.

Not applicable.

Item 6. Indemnification of Directors and Officers.

Delaware law provides that a corporation may eliminate or limit the personal liability of a director to the corporation or its stockholders for monetary damages for breach of fiduciary duty as a director, subject to certain exceptions. The effect of this provision is to eliminate the personal liability of directors to the corporation or its stockholders for monetary damages for actions involving a breach of their fiduciary duty of care, including any actions involving gross negligence. The Registrant’s restated certificate of incorporation contains such a provision that eliminates the personal liability of its directors to the Registrant or its stockholders for monetary damages for breach of fiduciary duty as a director to the fullest extent permitted by applicable law.

Delaware law also provides, in general, that a corporation has the power to indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation), because the person is or was a director or officer of the corporation. Such indemnity may be against expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by the person in connection with such action, suit or proceeding, if the person acted in good faith and in a manner the person reasonably believed to be in or not opposed to the best interests of the corporation and if, with respect to any criminal action or proceeding, the person did not have reasonable cause to believe the person’s conduct was unlawful. In addition, under Delaware law, in general, a corporation has the power to indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the corporation to procure a judgment in its favor because the person is or was a director or officer of the corporation, against any expenses (including attorneys’ fees) actually and reasonably incurred by the person in connection with the defense or settlement of such action or suit if the person acted in good faith and in a manner the person reasonably believed to be in or not opposed to the best interests of the corporation.

Additionally, under Delaware law, a corporation generally has the power to purchase and maintain insurance on behalf of any person who is or was a director or officer of the corporation against any liability asserted against the person in any such capacity, or arising out of the person’s status as such, whether or not the corporation would have the power to indemnify the person against such liability under the provisions of the law.

The Registrant’s amended and restated bylaws provide that the Registrant shall indemnify any person made or threatened to be made a party to an action or proceeding, whether criminal, civil, administrative or investigative (other than an action by or in the right of the Registrant), by reason of the fact that the person is or was a director, officer, employee or agent of the Registrant, or is or was serving at the request of the Registrant, any predecessor of the Registrant or any subsidiary of the Registrant as a director or officer at another entity, against expenses, including attorneys’ fees, judgments, fines and amounts paid in settlement actually and reasonably incurred in connection with such action, suit or proceeding. However, the aforementioned indemnification applies only if the indemnified person acted in good faith and in a manner he or she reasonably believed to be in or not opposed to the best interest of the Registrant, and with respect to any criminal action or proceeding, had no reasonable cause to believe his or her conduct was unlawful. The Registrant’s amended and restated bylaws also provide that the Registrant may, but is not required to provide the above indemnification (subject to the same qualifications) with respect to persons who are or were serving at the request of the Registrant or any predecessor or subsidiary of the Registrant as an employee or agent of another entity.

The Registrant’s amended and restated bylaws further provide that the Registrant shall indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the Registrant or any predecessor or subsidiary of the Registrant, to procure a judgment in the Registrant’s favor, by reason of the fact that he or she is or was a director or officer of the Registrant or any predecessor or subsidiary of the Registrant, or is or was serving at the request of the Registrant or predecessor or subsidiary of the Registrant, as a director, officer, employee or agent of another entity, against expenses, including attorneys’ fees, actually and reasonably incurred by him or her in connection with the defense or settlement of such action or suit. However, this indemnification applies only if the indemnified person acted in good faith and in a manner which the person reasonably believed to be in or not opposed to the best interests of the Registrant, any predecessor of the Registrant, or any subsidiary of the Registrant and no indemnification shall be made in respect of any claim, issue or matter as to which such person is adjudged to be liable to the Registrant, any predecessor of the Registrant, or any subsidiary of Registrant, unless and only to the extent that the Delaware Court of Chancery or the court in which such action or suit was brought determines that such person is entitled to such indemnity. The Registrant’s amended and restated bylaws also provide that the Registrant may, but is not required to provide the indemnification described in this paragraph (subject to the same qualifications) with respect to persons who are or were serving as employees and agents of the Registrant or any predecessor or subsidiary of the Registrant, or is or was serving at the request of the Registrant or any predecessor or subsidiary of the Registrant as a director, officer, employee or agent of another entity.

The Registrant’s amended and restated bylaws also provide that the Registrant shall advance to a director, officer, employee or agent of the Registrant the expenses incurred in defending a civil or criminal action, suit or proceeding in advance of the final disposition of such action, suit or proceeding upon receipt of an undertaking by or on behalf of the director, officer, employee or agent to repay such amount if it shall ultimately be determined that he or she is not entitled to be indemnified by the Registrant.

The Registrant’s amended and restated bylaws also provide that the Registrant shall have the power to purchase and maintain insurance on behalf of any person who is or was a director, officer, employee or agent of the Registrant or predecessor or subsidiary of the Registrant, or is or was serving at the request of the Registrant as a director, officer, employee or agent of

another entity, against any liability asserted against him or her and incurred by him or her in any such capacity, or arising out of his or her status as such, whether or not the Registrant would have the power to indemnify him or her against such liability under the indemnification provisions of the Registrant’s amended and restated bylaws.

Pursuant to the authority provided in the Registrant’s restated certificate of incorporation and amended and restated bylaws, the Registrant has entered into indemnification agreements with each of its executive officers and directors, indemnifying them against certain potential liabilities that may arise as a result of their service to the Registrant, and providing for certain other protections. The Registrant also maintains insurance policies which insure its officers and directors against certain liabilities.

The foregoing summaries are necessarily subject to the complete text of the statute, the Registrant’s restated certificate of incorporation and amended and restated bylaws and the agreements referred to above and are qualified in their entirety by reference thereto.

Item 7. Exemption from Registration Claimed.

Not applicable.

Item 8. Exhibits.

The following documents are filed as exhibits to this Registration Statement.

* Filed herewith.

Item 9. Undertakings.

Provided, however, that paragraphs (A)(1)(i) and (A)(1)(ii) do not apply if the registration statement is on Form S-8, and the information required to be included in a post-effective amendment by those paragraphs is contained in periodic reports filed with or furnished to the Commission by the Registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in this Registration Statement.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Sunnyvale, State of California, on April 2, 2019.

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below hereby constitutes and appoints, jointly and severally, Rami Rahim, Brian M. Martin and Kenneth B. Miller, each of them acting individually, as his or her true and lawful attorney-in-fact and agent, with full power of substitution and revocation, in his or her name and on his or her behalf, in any and all capacities, to sign the Registration Statement on Form S-8 of Juniper Networks, Inc., and any or all amendments (including post-effective amendments), and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully for all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or their substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration Statement on Form S-8 has been signed below by the following persons on behalf of the Registrant in the capacities and on the dates indicated.