UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934 (Amendment No.)

Filed by the Registrant ☒             Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐ Preliminary Proxy Statement

☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

☐ Definitive Proxy Statement

☒ Definitive Additional Materials

☐ Soliciting Material under §240.14a-12

Nikola Corporation

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

☒ No fee required.

☐ Fee paid previously with preliminary materials.

☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

[Social media post first used on May 20, 2024]

Vote FOR the reverse stock split to help maintain Nasdaq compliance and improve marketability of our common stock to a broader range of investors. Contact Alliance Advisors at (855) 935-2562 (toll-free) or 1-551-210-9929 (international) to vote your shares today. Learn more: [link to 2024 Annual Meeting landing page]

[Social media post to be first used on or about May 21, 2024]

#NKLA stockholders! Vote FOR all proposals. The deadline for voting is quickly approaching! Contact Alliance Advisors at (855) 935-2562 (toll-free) or 1-551-210-9929 (international) to vote your shares today. Learn more: [link to 2024 Annual Meeting landing page]

[Social media post to be first used on or about May 22, 2024]

Stockholders…EVERY vote matters. Contact Alliance Advisors at (855) 935-2562 (toll-free) or 1-551-210-9929 for international holders, to vote FOR all proposals TODAY.