OWLT Sandbridge Aquisition Corp

Filed pursuant to Rule 424(b)(3)

Registration Statement No. 333-258506

Prospectus Supplement No. 1

(To Prospectus dated August 24, 2021)

OWLET, INC.

This prospectus supplement updates, amends and supplements the prospectus dated August 24, 2021 (the “Prospectus”), which forms a part of our Registration Statement on Form S-1 (Registration No. 333-258506). Capitalized terms used in this prospectus supplement and not otherwise defined herein have the meanings specified in the Prospectus.

This prospectus supplement is being filed to update, amend and supplement the information included in the Prospectus with the information contained in our Current Report on Form 8-K (the “Current Report”), filed with the SEC on October 4, 2021. Accordingly, we have attached the Current Report to this prospectus supplement.

This prospectus supplement is not complete without the Prospectus. This prospectus supplement should be read in conjunction with the Prospectus, which is to be delivered with this prospectus supplement, and is qualified by reference thereto, except to the extent that the information in this prospectus supplement updates or supersedes the information contained in the Prospectus. Please keep this prospectus supplement with your Prospectus for future reference.

Owlet, Inc.’s common stock and warrants are listed on the New York Stock Exchange under the symbols “OWLT” and “OWLT WS.” On October 1, 2021, the closing price of our common stock was $5.48 and the closing price of our warrants was $0.94.

We are an “emerging growth company” under federal securities laws and are subject to reduced public company reporting requirements. Investing in our securities involves certain risks. See “Risk Factors” beginning on page 6 of the Prospectus.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities 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 4, 2021.

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 1, 2021

(844) 334-5330

(Registrant’s telephone number, including area code)

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:

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 8.01. Other Events.

On October 1, 2021, Owlet, Inc. (the “Company”) received a Warning Letter, dated October 1, 2021 (the “Warning Letter”), from the United States Food and Drug Administration (“FDA”).

The Warning Letter asserts that the Company’s marketing of its Owlet Smart Sock product (the “Smart Sock”) in the United States renders the Smart Sock a medical device requiring premarket clearance or approval from FDA, and that the Company has not obtained such clearance or approval in violation of the Federal, Food, Drug, and Cosmetic Act. The Warning Letter requests that the Company take prompt action to address the alleged violations. Among other things, the Warning Letter requests the Company cease commercial distribution of the Smart Sock for uses in measuring blood oxygen saturation and pulse rate where such metrics are intended to identify or diagnose desaturation and bradycardia using an alarm functionality to notify users that measurements are outside of preset values. The Warning Letter also identifies certain marketing claims that FDA believes render the Smart Sock a medical device.

The Company intends to fully cooperate with FDA to resolve the Warning Letter, including through the pursuit of a marketing authorization application for uses of the Smart Sock identified as medical device uses. In addition, the Company plans to issue a timely response to FDA, and further engage with FDA, regarding modifications and marketing changes to the Smart Sock with the goal of enabling continued commercial distribution of a modified product prior to receipt of any such marketing authorization that may be granted. The Company cannot, however, give any assurances that FDA will be satisfied with the Company’s actions taken in response to the matters raised in the Warning Letter. The Company also cannot give any assurances as to the timing of the resolution of such matters.