Filed Pursuant to Rule (424)(b)(3)
Registration No. 333-267113

ASTRA SPACE, INC.

34,000,000 SHARES OF CLASS A COMMON STOCK

This prospectus supplement amends and supplements the prospectus dated September 13, 2022 (as supplemented or amended from time to time, the “Prospectus”), which forms a part of our Registration Statement on Form S-1 (No. 333-267113). This prospectus supplement is being filed to update and supplement the information in the Prospectus with the information contained in our Current Report on Form 8-K, filed with the Securities and Exchange Commission on October 7, 2022 (the “Current Report”). Accordingly, we have attached the Current Report to this prospectus supplement.

The Prospectus and this prospectus supplement relate to the offer and resale of up to 34,000,000 shares of Class A Common Stock, par value $0.0001 per share (the “Class A Common Stock”), of Astra Space, Inc. by B. Riley Principal Capital II, LLC (the “Selling Stockholder”). The shares included in the Prospectus and this Prospectus supplement consist of shares of Class A Common Stock that we may, in our discretion, elect to issue and sell to the Selling Stockholder pursuant to a common stock purchase agreement we entered into with the Selling Stockholder on August 2, 2022 (the “Purchase Agreement”). Such shares of Class A Common Stock include (i) up to 33,281,805 shares of our Class A Common Stock that we may, in our sole discretion, elect to sell to the Selling Stockholder from time to time after the date of this prospectus, pursuant to the Purchase Agreement and (ii) 718,195 shares of our Class A Common Stock we issued, or may issue if certain conditions are met, in each case, to the Selling Stockholder as consideration for its commitment to purchase shares of our Class A Common Stock in one or more purchases that we may, in our sole discretion, direct them to make, from time to time after the date of this prospectus, pursuant to the Purchase Agreement. See “The Committed Equity Financing” for a description of the Purchase Agreement and “Selling Stockholder” for additional information regarding the Selling Stockholder.

Our Class A common stock is listed on Nasdaq under the symbol “ASTR”. On October 6, 2022, the closing price of our Class A common stock was $0.6199 per share.

This prospectus supplement updates and supplements the information in the Prospectus and is not complete without, and may not be delivered or utilized except in combination with, the Prospectus, including any amendments or supplements thereto. This prospectus supplement should be read in conjunction with the Prospectus and if there is any inconsistency between the information in the Prospectus and this prospectus supplement, you should rely on the information in this prospectus supplement.

Investing in our securities involves risks that are described in the “Risk Factors” section beginning on page 17 of the Prospectus.

Neither the SEC nor any state securities commission has approved or disapproved of the securities to be issued under the Prospectus or determined if the Prospectus or this prospectus supplement is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus supplement is October 7, 2022.

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): October 6, 2022

Astra Space, Inc.

(Exact name of Registrant as Specified in Its Charter)

Registrant’s Telephone Number, Including Area Code: (866) 278-7217

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:

Securities registered pursuant to Section 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.  ☐

On October 6, 2022, Astra Space, Inc. (“Astra”) received a deficiency notice from NASDAQ that Astra is not in compliance with Rule 5450(a)(1) of the listing requirements because its per share closing bid price has been below $1.00 for the last thirty consecutive business days. This notice has no immediate effect on the listing of Astra’s Class A common stock. Pursuant to Rule 5810(c)(3)(A), Astra has 180 calendar days, or until April 4, 2023, to regain compliance with the minimum bid price requirement set forth in Rule 5450(a)(1) (the “Minimum Bid Price Requirement”).

NASDAQ’s notice stated that if, at any time before April 4, 2023, the per share closing bid price of Astra’s Class A common stock is at least $1.00 for a minimum of ten consecutive business days, NASDAQ’s staff will provide Astra written notice that it complies with the Minimum Bid Price Requirement.

Astra intends to monitor the per share closing bid price of its Class A common stock and consider available options if its Class A common stock does not trade at a level likely to result in the Company regaining compliance with Minimum Bid Price Requirement by April 4, 2023.

If Astra does not regain compliance with the Minimum Bid Price Requirement by April 4, 2023, Astra may be eligible for an additional 180 calendar day compliance period. To qualify, Astra would need to, among other things, meet the continued listing requirement for market value of publicly held shares and all other initial listing standards for NASDAQ, with the exception of the Minimum Bid Price Requirement, and provide written notice to NASDAQ that it intends to cure the deficiency during the second compliance period.

If NASDAQ concludes that Astra will not be able to cure the deficiency during the second compliance period, or Astra does not make the required representations, then NASDAQ will give notice that Astra’s Class A common stock is subject to delisting and Astra will be able to appeal that delisting before a NASDAQ hearings panel.

There can be no assurance that Astra will regain compliance with the Minimum Bid Price Requirement or that it will otherwise remain in compliance with the other listing requirements for NASDAQ.

(d) Exhibits

SIGNATURES

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 thereunto duly authorized.