UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 18, 2021

Plug Power Inc.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (518) 782-7700

N/A

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934(§240.12b-2 of this chapter).

Emerging growth company ¨

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 13(a) of the Exchange Act. ¨

Item 3.01 Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing.

On May 18, 2021, Plug Power Inc. (the “Company”) received a notice (the “Notice”) from the Listing Qualifications Department of The Nasdaq Stock Market LLC (“Nasdaq”) indicating that, as a result of not having timely filed with the Securities and Exchange Commission (the “SEC”) its Quarterly Report on Form 10-Q for the quarter ended March 31, 2021 (the “Form 10-Q”), the Company in not in compliance with Nasdaq Listing Rule 5250(c)(1). Nasdaq Listing Rule 5250(c)(1) requires listed companies to timely file all required periodic financial reports with the SEC.

The Company filed its Annual Report on Form 10-K for the year ended December 31, 2020 (the “Form 10-K”) on May 14, 2021. As previously disclosed in the Company’s Form 12b-25 filed with the SEC on May 10, 2021, given the time and focus dedicated to completing the restatement and filing of the Form 10-K, the Company is delayed in its reporting and review process for the quarter ended March 31, 2021. The Company is working diligently to file the Form 10-Q as soon as practicable.

If the Company is unable to file the Form 10-Q with the SEC by June 14, 2021, the Company intends to submit a plan to regain compliance with the Nasdaq Listing Rules on or prior to that date. If Nasdaq accepts the Company’s plan, then Nasdaq may grant an exception of up to 180 calendar days from the due date of the Form 10-K, or until September 13, 2021, to regain compliance. If Nasdaq does not accept the Company’s plan, then the Company will have the opportunity to appeal that decision to a Nasdaq hearings panel.

The Notice has no immediate impact on the listing or trading of the Company’s common stock on the Nasdaq Capital Market.

Item 8.01. Other Events.

On May 19, 2021, the Company issued a press release announcing its receipt of the Notice from Nasdaq. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. 

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.