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OrbiMed Funds Acquire 6.3M Shares of STTK; Warrants Blocked at 9.99%

Filing Impact
(Low)
Filing Sentiment
(Neutral)
Form Type
SCHEDULE 13D

Rhea-AI Filing Summary

OrbiMed-affiliated entities disclosed acquiring an aggregate of 6,306,127 Shares of Shattuck Labs, representing 9.99% of the outstanding common stock on a post-PIPE basis. The holdings arise from the August 25, 2025 closing of a PIPE in which the issuer sold 15,225,158 Shares and pre-funded warrants and accompanying warrants aggregating potential issuance of 52,635,346 Shares. OrbiMed Private Investments IX, LP (OPI IX) purchased 5,255,106 Shares (≈9.99%) and OrbiMed Genesis Master Fund, L.P. (Genesis) purchased 1,051,021 Shares (≈1.67%).

The PIPE included pre-funded and common warrants but those warrants are subject to an exercise 9.99% blocker and are not presently exercisable. OrbiMed Advisors and its GP entities disclose shared voting and dispositive power over the shares held by the funds and note a board relationship via Director Mona Ashiya, who is obligated to transfer any director equity awards to OrbiMed-affiliated funds. A registration rights agreement was negotiated requiring the issuer to file a resale registration for the PIPE shares.

Positive

  • Aggregate 9.99% ownership reported by OrbiMed Advisors across affiliated funds, establishing a substantial investment position
  • Registration Rights Agreement secured in the PIPE obligates the issuer to file a resale registration, enabling liquidity for PIPE investors
  • PIPE closed on August 25, 2025, providing the reporting persons with immediate share positions and defined warrant exposure

Negative

  • Warrants subject to a 9.99% exercise blocker and are not presently exercisable, limiting immediate conversion upside
  • Affiliated board presence: OrbiMed-affiliated director Mona Ashiya may receive equity awards that are contractually transferred to OrbiMed funds, creating potential governance influence

Insights

TL;DR: OrbiMed funds secured a near-10% passive stake via a PIPE, with additional upside via warrants currently blocked from exercise.

The transaction establishes a substantial, non-control investment position: OPI IX holds 5,255,106 shares (≈9.99%) and Genesis holds 1,051,021 shares (≈1.67%), totaling 6,306,127 shares reported by OrbiMed Advisors. The PIPE pricing and structure created pre-funded warrants and common warrants that could materially increase share count but are subject to an anti-dilution/ownership 9.99% exercise blocker, limiting immediate dilution and exercise. Registration rights for resale were secured, improving liquidity for the PIPE investors once the registration statement is declared effective. For valuation impact, the disclosed percentages and the substantial warrant pool are material to potential future supply of shares; however, current economic ownership and voting power are limited to the shares held and the blocker prevents immediate warrant conversion.

TL;DR: Disclosure signals significant investor presence with governance access via a board member, but no intent to seek control is stated.

OrbiMed Advisors and its GP entities describe shared voting and dispositive authority over fund positions and disclose that Mona Ashiya, an OrbiMed Advisors member, sits on Shattuck's board and may receive director equity that will flow economically to OrbiMed funds. The filing expressly disclaims any plan to change board composition or seek control. Still, the combination of near-10% ownership by a single investor group and an affiliated director on the board is governance-relevant and could influence corporate decisions. The Registration Rights Agreement formalizes resale mechanics, reducing lock-up uncertainty for PIPE holders. Overall, this is a routine but material investor stake disclosure with potential governance implications should OrbiMed alter its intentions.






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).






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D


ORBIMED ADVISORS LLC
Signature:/s/ Carl L. Gordon
Name/Title:Carl L. Gordon/Member
Date:09/02/2025
OrbiMed Capital GP IX LLC
Signature:/s/ Carl L. Gordon
Name/Title:Carl L. Gordon/Member of OrbiMed Advisors LLC
Date:09/02/2025
OrbiMed Genesis GP LLC
Signature:/s/ Carl L. Gordon
Name/Title:Carl L. Gordon/Member of OrbiMed Advisors LLC
Date:09/02/2025

FAQ

How many Shattuck Labs (STTK) shares do OrbiMed entities own after the PIPE?

OrbiMed-affiliated entities report beneficial ownership of 6,306,127 shares in aggregate, representing 9.99% of outstanding shares on a post-PIPE basis.

What funds within OrbiMed participated in the PIPE for STTK?

OPI IX purchased 5,255,106 shares and Genesis purchased 1,051,021 shares, with each also receiving pre-funded warrants and common warrants.

Are the warrants received in the PIPE exercisable immediately?

No. The pre-funded warrants and common warrants contain an exercise limitation that prevents exercise to the extent it would result in beneficial ownership over 9.99%, and therefore the warrants are not presently exercisable.

Does OrbiMed intend to take control of Shattuck Labs (STTK)?

The filing states the shares were acquired for investment purposes and not with the intention of acquiring control; no plans to change board composition or effect other control-changing actions were disclosed.

Will PIPE investors be able to resell their shares?

Yes. The Issuer agreed to file a registration statement within 30 calendar days after the PIPE closing to register resale of the PIPE shares, per the Registration Rights Agreement.
Shattuck Labs, Inc.

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