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Baker Bros. lifts Celcuity (NASDAQ: CELC) ownership cap to 19.99%

Filing Impact
(Moderate)
Filing Sentiment
(Neutral)
Form Type
SCHEDULE 13D/A

Rhea-AI Filing Summary

Baker Bros. Advisors and related entities filed an amended Schedule 13D for Celcuity Inc., reporting beneficial ownership of 9,582,874 shares of common stock, representing 19.99% of the class. This percentage is based on 46,271,259 shares outstanding as of November 6, 2025 plus 1,667,082 shares underlying $0.001 prefunded warrants exercisable within 60 days. On March 20, 2026, the funds notified Celcuity that they were increasing the beneficial ownership limitation on 481,437 and 5,666,350 $0.001 prefunded warrants held by 667 and Baker Brothers Life Sciences, respectively, from 4.99% to 19.99%, effective May 20, 2026. The reporting persons state they did not acquire additional securities in connection with this change and continue to hold their position for investment purposes, while reserving flexibility to buy or sell Celcuity securities in the future.

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15102K100

(CUSIP Number)
Alexandra A. Toohey, CFO
860 Washington Street, 3rd Floor,
New York, NY, 10014
212-339-5690

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)
03/20/2026

(Date of Event Which Requires Filing of This Statement)


If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).




schemaVersion:


SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D


Baker Bros. Advisors LP
Signature:/s/ Scott L. Lessing
Name/Title:Scott L. Lessing / President, By: Baker Bros. Advisors (GP) LLC, its general partner
Date:03/24/2026
Baker Bros. Advisors (GP) LLC
Signature:/s/ Scott L. Lessing
Name/Title:Scott L. Lessing / President
Date:03/24/2026
Julian C. Baker
Signature:/s/ Julian C. Baker
Name/Title:Julian C. Baker
Date:03/24/2026
Felix J. Baker
Signature:/s/ Felix J. Baker
Name/Title:Felix J. Baker
Date:03/24/2026

FAQ

What percentage of Celcuity (CELC) does Baker Bros. now report owning?

Baker Bros. and related entities report beneficial ownership of 9,582,874 Celcuity common shares, representing 19.99% of the outstanding class. This percentage uses Celcuity’s reported 46,271,259 shares outstanding plus 1,667,082 shares underlying exercisable prefunded warrants.

Did Baker Bros. acquire new Celcuity (CELC) shares in this Schedule 13D amendment?

The reporting persons state they did not acquire any additional Celcuity securities in connection with this amendment. The filing instead reflects updated beneficial ownership calculations and changes to the ownership limits on existing $0.001 prefunded warrants already held by their funds.

What change did Baker Bros. make to its Celcuity (CELC) prefunded warrant limits?

On March 20, 2026, Baker Bros.’ funds notified Celcuity they were raising the beneficial ownership limitation on certain $0.001 prefunded warrants from 4.99% to 19.99%. This higher cap, effective May 20, 2026, increases how many shares may be counted as beneficially owned.

How many Celcuity (CELC) prefunded warrants are affected by the new 19.99% limit?

The notice covers 481,437 $0.001 prefunded warrants held by 667, L.P. and 5,666,350 $0.001 prefunded warrants held by Baker Brothers Life Sciences, L.P. These warrants are exercisable for Celcuity common stock, subject to the updated 19.99% beneficial ownership cap.

How is Celcuity (CELC) share count determined for Baker Bros.’ 19.99% ownership?

The 19.99% figure is based on 46,271,259 Celcuity common shares outstanding as of November 6, 2025, plus 1,667,082 common shares underlying $0.001 prefunded warrants that are exercisable within 60 days, all as described in the company’s Form 10-Q.

What ownership limits apply to Baker Bros.’ 2.75% Celcuity (CELC) convertible notes?

The 2.75% convertible notes can only be converted if, after conversion, Baker Bros. and affiliates would beneficially own no more than 4.99% of Celcuity’s common stock, a limit that can be raised by written notice up to 19.99%, effective 61 days after notice.
Celcuity Inc

NASDAQ:CELC

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Biotechnology
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United States
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