Adage Capital Partners Cuts Aura Biosciences Stake to 9.9%

TL;DR

**Adage Capital Partners just trimmed its stake in Aura Biosciences to 9.9%, watch for potential stock price reaction.**

AI Summary

Adage Capital Partners, L.P. filed an amended SC 13G/A on February 7, 2024, disclosing its ownership in Aura Biosciences, Inc. As of December 31, 2023, Adage Capital Partners, L.P. beneficially owned 4,225,000 shares of Aura Biosciences' common stock, representing 9.9% of the company. This is a decrease from their previous filing, indicating they've reduced their stake, which could signal a shift in their investment strategy or outlook on Aura Biosciences' future performance.

Why It Matters

This filing shows a significant institutional investor, Adage Capital Partners, has reduced its ownership in Aura Biosciences, which could be interpreted negatively by the market and potentially impact the stock price.

Risk Assessment

Risk Level: medium — A large institutional investor reducing its stake can sometimes signal a lack of confidence, potentially leading to downward pressure on the stock price.

Analyst Insight

Investors should monitor Aura Biosciences' stock performance closely and research any potential reasons for Adage Capital Partners' reduced stake before making investment decisions.

Key Numbers

• 4,225,000 — Shares Beneficially Owned (This is the total number of Aura Biosciences shares Adage Capital Partners, L.P. reported owning as of December 31, 2023.)
• 9.9% — Percentage of Class (This represents the percentage of Aura Biosciences' common stock that Adage Capital Partners, L.P. beneficially owns, indicating a significant but reduced stake.)
• 05153U107 — CUSIP Number (This unique identifier confirms the specific class of securities (Common Stock, par value $0.00001 per share) of Aura Biosciences, Inc. being reported.)
• February 7, 2024 — Filing Date (This is the date the amended SC 13G/A was filed, providing the most recent public disclosure of Adage Capital Partners' holdings.)
• December 31, 2023 — Event Date (This is the specific date on which the reported ownership percentage was calculated, providing a clear snapshot of their holdings.)

Key Players & Entities

• Adage Capital Partners, L.P. (company) — the reporting person who filed the SC 13G/A
• Aura Biosciences, Inc. (company) — the subject company whose shares are being reported
• 4,225,000 (dollar_amount) — number of shares beneficially owned by Adage Capital Partners, L.P.
• 9.9% (dollar_amount) — percentage of Aura Biosciences' common stock owned by Adage Capital Partners, L.P.
• December 31, 2023 (date) — the date of the event requiring the filing

Forward-Looking Statements

• Aura Biosciences' stock price may experience downward pressure in the short term. (Aura Biosciences, Inc.) — medium confidence, target: 3 months
• Other institutional investors might re-evaluate their positions in Aura Biosciences. (Institutional Investors) — low confidence, target: 6 months

FAQ

Key Financial Figures

• $0.00001 — me of Issuer) Common Stock, par value $0.00001 per share (Title of Class of Securitie

Filing Documents

• p24-0385sc13ga.htm (SC 13G/A) — 92KB
• 0000902664-24-001181.txt ( ) — 93KB

(a)

Item 1(a). NAME OF ISSUER: The name of the issuer is Aura Biosciences, Inc. (the “ Company ”).

(b)

Item 1(b). ADDRESS OF ISSUER’S PRINCIPAL EXECUTIVE OFFICES: The Company’s principal executive offices are located at 80 Guest Street, Boston, MA 02135.

(a)

Item 2(a). NAME OF PERSON FILING: This statement is filed by: (i) Adage Capital Partners, L.P., a Delaware limited partnership (“ ACP ”) with respect to the Common Stock directly owned by it; (ii) Adage Capital Partners GP, L.L.C., a limited liability company organized under the laws of the State of Delaware (“ ACPGP ”), as general partner of ACP with respect to the Common Stock directly owned by ACP; (iii) Adage Capital Management, L.P., a Delaware limited partnership (“ ACM ”), as the investment manager of ACP, with respect to the Common Stock directly owned by ACP; (iv) Robert Atchinson (“ Mr. Atchinson ”), as (1) managing member of Adage Capital Advisors, L.L.C., a limited liability company organized under the laws of the State of Delaware (“ ACA ”), managing member of ACPGP and (2) managing member of Adage Capital Partners LLC, a Delaware limited liability company (“ ACPLLC ”), general partner of ACM, with respect to the Common Stock directly owned by ACP; and (v) Phillip Gross (“ Mr. Gross ”), as (1) managing member of ACA, managing member of ACPGP and (2) managing member of ACPLLC, general partner of ACM, with respect to the Common Stock directly owned by ACP. The foregoing persons are hereinafter sometimes collectively referred to as the “ Reporting Persons .” Any disclosures herein with respect to persons other than the Reporting Persons are made on information and belief after making inquiry to the appropriate party. The filing of this statement should not be construed in and of itself as an admission by any Reporting Person as to beneficial ownership of the securities reported herein.

(b)

Item 2(b). ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE: The address of the business office of each of the Reporting Persons is 200 Clarendon Street, 52nd Floor, Boston, Massachusetts 02116.

(c)

Item 2(c). CITIZENSHIP: ACP and ACM are limited partnerships organized under the laws of the State of Delaware. ACPGP is a limited liability company organized under the laws of the State of Delaware. Messrs. Gross and Atchinson are citizens of the United States. CUSIP No. 05153U107 13G/A Page 8 of 10 Pages

(d)

Item 2(d). TITLE OF CLASS OF SECURITIES: Common Stock, par value $0.00001 per share (the “ Common Stock ”).

(e)

Item 2(e). CUSIP NUMBER: 05153U107 Item 3. IF THIS STATEMENT IS FILED PURSUANT TO Rules 13d-1(b), OR 13d-2(b) OR (c), CHECK WHETHER THE PERSON FILING IS A: (a) Broker or dealer registered under Section 15 of the Act; (b) Bank as defined in Section 3(a)(6) of the Act; (c) Insurance company as defined in Section 3(a)(19) of the Act; (d) Investment company registered under Section 8 of the Investment Company Act of 1940; (e) An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E); (f) An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F); (g) A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G); (h) A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act; (i) A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act; (j) A non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J); (k) Group, in accordance with Rule 13d-1(b)(1)(ii)(K). If filing as a non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J), please specify the type of institution: Not applicable Item 4. OWNERSHIP: The information required by Items 4(a) – (c) is set forth in Rows (5) – (11) of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person. The percentage set forth in this Schedule 13G/A is calculated based upon 49,086,606 shares of Common Stock reported to be outstanding d in the Company's Prospectus Supplement filed pursuant to Rule 424(b)(5) filed with the Securities and Exchange Commission on November 7, 2023, after giving effect to the completion of the offering, as described therein. Item 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS: Not applicable. CUSIP No. 05153U107 13G/A Page 9 of 10 Pages Item 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON:

SIGNATURES

SIGNATURES After reasonable inquiry and to the best of his or its knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct. DATE: February 7, 2024 ADAGE CAPITAL PARTNERS, L.P. By: Adage Capital Partners GP, L.L.C., its general partner By: Adage Capital Advisors, L.L.C., its managing member /s/ Robert Atchinson Name: Robert Atchinson Title: Managing Member ADAGE CAPITAL PARTNERS GP, L.L.C. By: Adage Capital Advisors, L.L.C., its managing member /s/ Robert Atchinson Name: Robert Atchinson Title: Managing Member ADAGE CAPITAL MANAGEMENT, L.P. By: Adage Capital Partners LLC, its general partner /s/ Robert Atchinson Name: Robert Atchinson Title: Managing Member /s/ Robert Atchinson ROBERT ATCHINSON, individually /s/ Phillip Gross PHILLIP GROSS, individually