STOCK TITAN

D. E. Shaw (GOSS) discloses 9.5% stake after major exchange offer

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

Rhea-AI Filing Summary

D. E. Shaw and related entities report a large stake in Gossamer Bio, Inc. following a debt-for-equity exchange. They report beneficial ownership of 46,485,295 common shares, equal to 9.5% of Gossamer’s outstanding stock as of June 5, 2026, held through Valence, Cogence and funds managed by DESIM.

On June 4, 2026, the reporting group acquired 48,107,644 new shares plus new 7.50% Convertible Senior Secured First Lien Notes due 2030 and purchase warrants in an exchange of existing 5.00% convertible notes. In total, the issuer issued $65,174,000 of new convertible notes, 254,150,441 new shares, 33,402,727 prefunded warrants and 135,789,000 purchase warrants in the early settlement.

The new notes pay 7.50% interest, mature in 2030 with a springing 2027 maturity if more than $4.0 million of old notes remain, and include conversion features subject to stockholder approval and a 4.99%–9.99% beneficial ownership cap. The purchase warrants are exercisable from December 3, 2026 to June 4, 2031 with similar ownership limits. D. E. Shaw’s entities also hold short positions referencing 3,732,304 shares.

Positive

  • None.

Negative

  • None.

Insights

Large debt-for-equity swap and 9.5% stake reshape Gossamer’s capital structure.

The disclosure shows D. E. Shaw–affiliated entities now beneficially own 46,485,295 Gossamer Bio shares (9.5% of outstanding), obtained mainly via an exchange of 5.00% 2027 convertible notes into new 7.50% secured 2030 notes, equity and warrants.

The issuer issued $65,174,000 in new convertible notes, 254,150,441 new shares, 33,402,727 prefunded warrants and 135,789,000 purchase warrants in early settlement, substantially altering leverage and potential dilution. Conversion and exercise are constrained by 4.99%–9.99% beneficial ownership limits, which may moderate any single holder’s voting power.

The reporting group participated via a Transaction Support Agreement and Voting Agreements that commit their new shares to support specific stockholder proposals at the July 14, 2026 special meeting, including share authorization increases and a potential reverse split. Future company disclosures around final exchange participation and stockholder approvals will clarify the long-term impact of this recapitalization.

Beneficial ownership 46,485,295 shares (9.5%) Common shares beneficially owned as of June 5, 2026
New shares acquired 48,107,644 shares New Shares acquired by reporting persons in exchange offer on June 4, 2026
Existing notes tendered $30,290,000 principal Existing 5.00% Convertible Senior Notes tendered by Valence and Cogence
New convertible notes issued $65,174,000 principal Aggregate principal amount of new 7.50% notes issued at early settlement
New shares issued 254,150,441 shares New Shares issued by Gossamer in early settlement of exchange offer
Prefunded warrants issued 33,402,727 warrants Prefunded warrants issued in early settlement
Purchase warrants issued 135,789,000 warrants Purchase Warrants issued in early settlement
Coupon on new notes 7.50% per annum Interest rate on new Convertible Senior Secured First Lien Notes due 2030
Exchange Offer financial
"the Issuer commenced an exchange offer (the "Exchange Offer") to exchange any and all of its 5.00% Convertible Senior Notes due 2027"
An exchange offer is a proposal where a company asks investors to swap existing securities, like bonds or shares, for new ones, often with different terms or maturity dates. It matters to investors because it can affect the value of their holdings and the company's financial strategy, potentially providing benefits like better interest rates or reduced debt.
New Convertible Notes financial
"new 7.50% Convertible Senior Secured First Lien Notes due 2030 (the "New Convertible Notes")"
Prefunded Warrants financial
"in lieu of issuing Common Shares to the extent any investor would beneficially own greater than 9.99% ... prefunded warrants to purchase Common Shares (the "Prefunded Warrants")"
Prefunded warrants are a security that gives the holder the right to convert the warrant into a share after paying a very small remaining amount because almost the full purchase price was paid upfront. They matter to investors because exercising them increases the company’s outstanding shares (dilution) and can provide immediate cash to the issuer while allowing holders to bypass ownership limits or simplify timing, similar to buying a nearly-complete gift card that only needs a tiny top-up to use.
Purchase Warrants financial
"up to 150,000,000 warrants to purchase Common Shares (the "Purchase Warrants")"
Purchase warrants are tradable certificates that give the holder the right, but not the obligation, to buy a company's shares at a fixed price for a limited time. They matter to investors because they offer leveraged exposure—like a coupon that lets you buy a stock later at today’s price if it goes up—while carrying the risk of expiring worthless and potentially reducing each existing shareholder’s ownership if they are used.
Transaction Support Agreement financial
"entered into a transaction support agreement with the Issuer (the "Transaction Support Agreement") to support the Exchange Offer"
A transaction support agreement is a contract among the parties involved in a pending deal that spells out who must do what, who bears which risks, and how any problems discovered before or after closing will be handled. Think of it as a moving checklist and shared rulebook that helps the deal finish smoothly. Investors care because its terms affect the likelihood and timing of closing, potential costs or liabilities after the deal, and the value or dilution of their holdings.
beneficial ownership limitation regulatory
"The Indenture contains a non-waivable beneficial ownership limitation provision providing that no New Convertible Note will be optionally convertible"
A beneficial ownership limitation is a rule that caps the percentage of a company’s shares an investor can be treated as owning or controlling for voting, regulatory or tax purposes. It matters to investors because it can restrict how many shares a person or group can buy or vote, affect takeover chances, and influence share liquidity and value — like a speed limit that prevents any single driver from taking over the whole road.
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38341P102

(CUSIP Number)
D. E. Shaw & Co., L.P.
Legal & Compliance, Two Manhattan West, 375 Ninth Ave., 52nd Floor
New York, NY, 10001
212-478-0000

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)
06/04/2026

(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).




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SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D


D. E. Shaw Valence Portfolios, L.L.C.
Signature:/s/ Daniel R. Marcus
Name/Title:Daniel R. Marcus / Authorized Signatory
Date:06/11/2026
D. E. Shaw & Co., L.L.C.
Signature:/s/ Daniel R. Marcus
Name/Title:Daniel R. Marcus / Authorized Signatory
Date:06/11/2026
D. E. Shaw & Co., L.P.
Signature:/s/ Daniel R. Marcus
Name/Title:Daniel R. Marcus / Chief Compliance Officer
Date:06/11/2026
David E. Shaw
Signature:/s/ Daniel R. Marcus
Name/Title:Daniel R. Marcus / Attorney-in-Fact for David E. Shaw
Date:06/11/2026