Filed pursuant to Rule 424(b)(3)

Registration No. 333-261399

PROSPECTUS SUPPLEMENT NO. 17

(to Prospectus dated March 16, 2022)

Rockley Photonics Holdings Limited

Up to 7,785,560 Ordinary Shares

This prospectus supplement supplements the prospectus dated March 16, 2022 (the “Prospectus”), which forms a part of our registration statement on Form S-1 (No. 333-261399). 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 December 15, 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 sale from time to time of up to 7,785,560 ordinary shares, nominal value $0.000004026575398 per share, of Rockley Photonics Holdings Limited, a Cayman Islands exempted company, by Lincoln Park Capital Fund, LLC, or Lincoln Park or the selling shareholder.

The ordinary shares being offered by the selling shareholder may be issued pursuant to the purchase agreement dated November 15, 2021 that we entered into with Lincoln Park. See “The Lincoln Park Transaction” in the Prospectus for a description of that agreement and “Selling Shareholder” in the Prospectus for additional information regarding Lincoln Park. The prices at which Lincoln Park may sell the shares will be determined by the prevailing market price for the shares or in negotiated transactions.

We are not selling any securities under the Prospectus or this prospectus supplement and will not receive any of the proceeds from the sale of shares by the selling shareholder.

The selling shareholder may sell the ordinary shares described in the Prospectus and this prospectus supplement in a number of different ways and at varying prices. See “Plan of Distribution” in the Prospectus for more information about how the selling shareholder may sell the ordinary shares being registered pursuant to the Prospectus or this prospectus supplement. The selling shareholder is an “underwriter” within the meaning of Section 2(a)(11) of the Securities Act of 1933, as amended (the “Securities Act”).

Our Ordinary Shares are listed on the New York Stock Exchange under the symbol “RKLY.” On December 14, 2022, the closing price of our Ordinary Shares was $0.24 per share. We are an “emerging growth company” and a “smaller reporting company” as those terms are defined under the federal securities laws and, as such, have elected to comply with certain reduced public company disclosure and reporting requirements.

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.

See the section entitled “Risk Factors” beginning on page 7 of the Prospectus and in the documents incorporated by reference in the Prospectus to read about factors you should consider before buying our securities.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus supplement or the Prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus supplement is December 15, 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): December 9, 2022

____________________________

Rockley Photonics Holdings Limited

(Exact name of registrant as specified in its charter)

____________________________

Cayman Islands	001-40735	98-1644526
(State or other jurisdiction of incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)
3rd Floor 1 Ashley Road Altrincham, Cheshire United Kingdom (Address of principal executive offices)		WA14 2DT (Zip Code)

+44 (0) 1865 292017

(Registrant’s telephone number, including area code)

Not Applicable

(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 Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Ordinary shares, $0.000004026575398 par value per share	RKLY	The New York Stock Exchange
Warrants, each whole warrant exercisable for one ordinary share at an exercise price of $11.50 per share	RKLY.WS	The New York Stock Exchange

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 December 9, 2022, Rockley Photonics Holdings Limited (the “Company”) received a letter from the New York Stock Exchange (“NYSE”) notifying it that the Company is not in compliance with the continued listing requirement in Section 802.01B of the NYSE’s Listed Company Manual because the Company’s market capitalization fell below $50 million over a 30 trading day period and its stockholders’ equity is less than $50 million. In accordance with Section 802.02 of the NYSE’s Listed Company Manual, the Company intends to submit a business plan to the NYSE within 45 days that shows how the Company plans to regain compliance with this continued listing standard within 18 months from the date of the notice.

This Current Report on Form 8-K contains forward-looking statements that are subject to various assumptions, risks, and uncertainties. These forward-looking statements include statements or assumptions regarding the Company’s intentions, expectations, and beliefs, including but not limited to the Company’s intention to regain compliance with the NYSE’s continued listing requirements. The Company believes that its expectations, as expressed in these statements, are based on reasonable assumptions regarding risks and uncertainties inherent in achieving those expectations; however, these statements are not guarantees of performance and actual results may differ materially. Risks and uncertainties which may cause actual results to differ from those expressed or implied in the Company’s forward-looking statements include, but are not limited to, the risk factors described under the heading “Risk Factors” in the Company’s Annual Report on Form 10-K and in other documents the Company files with the Securities and Exchange Commission. The Company expressly disclaims any current intention to update any forward-looking statement as a result of new information or future events or developments, except as required by law.

Item 7.01. Regulation FD Disclosure.

On December 15, 2022, the Company issued a press release entitled “Rockley PhotonicsAnnounces Receipt of Notice From NYSE of Non-Compliance With Continued Listing Standards” which is furnished as Exhibit 99.1 hereto.

The information in Item 7.01 of this Current Report on Form 8-K, including Exhibit 99.1, shall not be deemed to be filed for purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”), or otherwise subject to the liability of that section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933 or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

Exhibit No.	Description
99.1	Press release dated December 15, 2022
104	Cover Page Interactive Data File (embedded within the Inline XBRL document)

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.

		Rockley Photonics Holdings Limited
Date:	December 15, 2022	By:	/s/ Tom Adams
		Name:	Tom Adams
		Title:	General Counsel