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[S-8 POS] Turnstone Biologics Corp. SEC Filing

Filing Impact
(Low)
Filing Sentiment
(Neutral)
Form Type
S-8 POS
Rhea-AI Filing Summary

Turnstone Biologics Corp. has filed post-effective amendments to withdraw and deregister all unsold shares that remained registered under two Form S-8 registration statements. The company removed a total of 7,003,706 unsold shares from registration, representing shares reserved under its 2018 Equity Incentive Plan, 2023 Equity Incentive Plan and 2023 Employee Stock Purchase Plan.

The deregistration follows a merger agreement under which Turnstone became a wholly owned subsidiary of XOMA Royalty Corporation, with XRA 3 Corp. as merger sub. As a result, the Registrant terminated the offerings contemplated by the S-8 registration statements and removed the unsold shares from registration as required by its prior undertakings. The post-effective amendments were signed by Owen Hughes, President, Treasurer and Secretary.

Turnstone Biologics Corp. ha depositato emendamenti successivi all'efficacia per ritirare e cancellare dalla registrazione tutte le azioni invendute che risultavano ancora registrate in due dichiarazioni di registrazione sul Modulo S-8. La società ha rimosso complessivamente 7,003,706 azioni invendute dalla registrazione, corrispondenti a titoli riservati nei suoi piani 2018 Equity Incentive Plan, 2023 Equity Incentive Plan e 2023 Employee Stock Purchase Plan.

La cancellazione dalla registrazione segue un accordo di fusione in base al quale Turnstone è diventata una controllata interamente posseduta da XOMA Royalty Corporation, con XRA 3 Corp. come società di fusione sussidiaria. Di conseguenza, la registrante ha terminato le offerte previste dalle dichiarazioni di registrazione S-8 e ha rimosso le azioni invendute dalla registrazione in conformità ai suoi impegni precedenti. Gli emendamenti successivi all'efficacia sono stati firmati da Owen Hughes, Presidente, Tesoriere e Segretario.

Turnstone Biologics Corp. presentó enmiendas posteriores a la entrada en vigor para retirar y dar de baja de la inscripción todas las acciones no vendidas que permanecían registradas bajo dos declaraciones de registro del Formulario S-8. La compañía eliminó un total de 7,003,706 acciones no vendidas de la inscripción, correspondientes a acciones reservadas en su 2018 Equity Incentive Plan, 2023 Equity Incentive Plan y 2023 Employee Stock Purchase Plan.

La cancelación de la inscripción se produce tras un acuerdo de fusión por el cual Turnstone pasó a ser una subsidiaria totalmente propiedad de XOMA Royalty Corporation, con XRA 3 Corp. como filial de fusión. Como resultado, la registrante dio por terminadas las ofertas contempladas por las declaraciones de registro S-8 y retiró las acciones no vendidas de la inscripción, conforme a sus compromisos anteriores. Las enmiendas posteriores a la entrada en vigor fueron firmadas por Owen Hughes, Presidente, Tesorero y Secretario.

Turnstone Biologics Corp.는 두 건의 Form S-8 등록신고서에 여전히 등록되어 있던 모든 미판매 주식을 철회하고 등록을 말소하기 위한 효력 후 수정서(post-effective amendments)를 제출했습니다. 회사는 총 7,003,706주의 미판매 주식을 등록에서 말소했으며, 이는 2018 Equity Incentive Plan, 2023 Equity Incentive Plan2023 Employee Stock Purchase Plan에 예약된 주식에 해당합니다.

이 등록 말소는 Turnstone이 XRA 3 Corp.를 합병 자회사로 하여 XOMA Royalty Corporation의 완전 자회사가 되는 합병계약에 따른 것입니다. 따라서 등록회사는 S-8 등록신고서에 따른 공모를 종료하고 이전의 약정에 따라 미판매 주식을 등록에서 제거했습니다. 효력 후 수정서는 Owen Hughes 사장 겸 재무 및 서기가 서명했습니다.

Turnstone Biologics Corp. a déposé des amendements post-efficacité pour retirer et radier de l'inscription toutes les actions invendues qui restaient enregistrées sous deux déclarations d'enregistrement au Formulaire S-8. La société a retiré au total 7,003,706 actions invendues de l'inscription, correspondant à des actions réservées dans ses 2018 Equity Incentive Plan, 2023 Equity Incentive Plan et 2023 Employee Stock Purchase Plan.

La radiation intervient après un accord de fusion par lequel Turnstone est devenue une filiale entièrement détenue par XOMA Royalty Corporation, XRA 3 Corp. agissant comme filiale de fusion. En conséquence, la société inscrite a mis fin aux offres prévues par les déclarations d'enregistrement S-8 et a retiré les actions invendues de l'inscription conformément à ses engagements antérieurs. Les amendements post-efficacité ont été signés par Owen Hughes, Président, Trésorier et Secrétaire.

Turnstone Biologics Corp. hat Nachträge nach dem Wirksamwerden eingereicht, um alle unveräußerten Aktien, die noch unter zwei Registrierungsformularen auf Form S-8 geführt wurden, zurückzuziehen und zu deregistrieren. Das Unternehmen strich insgesamt 7,003,706 unveräußerte Aktien aus der Registrierung, die im Rahmen seines 2018 Equity Incentive Plan, 2023 Equity Incentive Plan und 2023 Employee Stock Purchase Plan reserviert waren.

Die Deregistrierung erfolgt im Anschluss an eine Fusionsvereinbarung, aufgrund derer Turnstone eine vollständig im Eigentum von XOMA Royalty Corporation stehende Tochtergesellschaft wurde, wobei XRA 3 Corp. als Fusionstochter fungierte. Infolgedessen hat die registrierte Gesellschaft die in den S-8-Registrierungsformularen vorgesehenen Angebote eingestellt und die unveräußerten Aktien gemäß ihren früheren Verpflichtungen aus der Registrierung entfernt. Die nach dem Wirksamwerden eingereichten Nachträge wurden von Owen Hughes, Präsident, Schatzmeister und Sekretär, unterzeichnet.

Positive
  • Merger completed: Turnstone became a wholly owned subsidiary of XOMA Royalty Corporation following the merger.
  • Comprehensive deregistration: The company removed 7,003,706 unsold shares from registration across its equity plans, fulfilling its registration undertakings.
Negative
  • Termination of offerings: The Registrant terminated all offerings of securities under the referenced Form S-8 registration statements.
  • Registered equity pool removed: Shares previously available for grant or sale under the 2018 Plan, 2023 Plan and 2023 ESPP are no longer registered under those S-8 statements.

Insights

TL;DR: The company completed a merger and then removed unsold S-8 shares, terminating equity-plan offerings tied to the standalone registrant.

The Merger Sub was merged into Turnstone with Turnstone surviving as a wholly owned subsidiary of XOMA Royalty Corporation. Following that corporate change, Turnstone filed post-effective amendments to withdraw and terminate the effectiveness of its two Form S-8 registration statements, removing 7,003,706 unsold shares previously registered for issuance under the 2018 Plan, the 2023 Plan and the 2023 ESPP. This is a standard post-close corporate housekeeping step after a change in control that ends the registrant's separate securities offerings; it clarifies the pool of registered but unissued shares is no longer available under those registration statements.

TL;DR: Governance actions reflect termination of the registrant's standalone equity issuance capability after the acquisition.

Turnstone's post-effective amendments implement an undertaking in its S-8 filings to remove from registration any unsold securities when offerings terminate. The filing identifies the specific registrants and plans affected and documents that the company has terminated those offerings as it now operates as a wholly owned subsidiary of the acquiring parent. For stakeholders, this filing legally ends the registration status of the listed shares under the referenced S-8 statements and records the corporate change formally in SEC filings.

Turnstone Biologics Corp. ha depositato emendamenti successivi all'efficacia per ritirare e cancellare dalla registrazione tutte le azioni invendute che risultavano ancora registrate in due dichiarazioni di registrazione sul Modulo S-8. La società ha rimosso complessivamente 7,003,706 azioni invendute dalla registrazione, corrispondenti a titoli riservati nei suoi piani 2018 Equity Incentive Plan, 2023 Equity Incentive Plan e 2023 Employee Stock Purchase Plan.

La cancellazione dalla registrazione segue un accordo di fusione in base al quale Turnstone è diventata una controllata interamente posseduta da XOMA Royalty Corporation, con XRA 3 Corp. come società di fusione sussidiaria. Di conseguenza, la registrante ha terminato le offerte previste dalle dichiarazioni di registrazione S-8 e ha rimosso le azioni invendute dalla registrazione in conformità ai suoi impegni precedenti. Gli emendamenti successivi all'efficacia sono stati firmati da Owen Hughes, Presidente, Tesoriere e Segretario.

Turnstone Biologics Corp. presentó enmiendas posteriores a la entrada en vigor para retirar y dar de baja de la inscripción todas las acciones no vendidas que permanecían registradas bajo dos declaraciones de registro del Formulario S-8. La compañía eliminó un total de 7,003,706 acciones no vendidas de la inscripción, correspondientes a acciones reservadas en su 2018 Equity Incentive Plan, 2023 Equity Incentive Plan y 2023 Employee Stock Purchase Plan.

La cancelación de la inscripción se produce tras un acuerdo de fusión por el cual Turnstone pasó a ser una subsidiaria totalmente propiedad de XOMA Royalty Corporation, con XRA 3 Corp. como filial de fusión. Como resultado, la registrante dio por terminadas las ofertas contempladas por las declaraciones de registro S-8 y retiró las acciones no vendidas de la inscripción, conforme a sus compromisos anteriores. Las enmiendas posteriores a la entrada en vigor fueron firmadas por Owen Hughes, Presidente, Tesorero y Secretario.

Turnstone Biologics Corp.는 두 건의 Form S-8 등록신고서에 여전히 등록되어 있던 모든 미판매 주식을 철회하고 등록을 말소하기 위한 효력 후 수정서(post-effective amendments)를 제출했습니다. 회사는 총 7,003,706주의 미판매 주식을 등록에서 말소했으며, 이는 2018 Equity Incentive Plan, 2023 Equity Incentive Plan2023 Employee Stock Purchase Plan에 예약된 주식에 해당합니다.

이 등록 말소는 Turnstone이 XRA 3 Corp.를 합병 자회사로 하여 XOMA Royalty Corporation의 완전 자회사가 되는 합병계약에 따른 것입니다. 따라서 등록회사는 S-8 등록신고서에 따른 공모를 종료하고 이전의 약정에 따라 미판매 주식을 등록에서 제거했습니다. 효력 후 수정서는 Owen Hughes 사장 겸 재무 및 서기가 서명했습니다.

Turnstone Biologics Corp. a déposé des amendements post-efficacité pour retirer et radier de l'inscription toutes les actions invendues qui restaient enregistrées sous deux déclarations d'enregistrement au Formulaire S-8. La société a retiré au total 7,003,706 actions invendues de l'inscription, correspondant à des actions réservées dans ses 2018 Equity Incentive Plan, 2023 Equity Incentive Plan et 2023 Employee Stock Purchase Plan.

La radiation intervient après un accord de fusion par lequel Turnstone est devenue une filiale entièrement détenue par XOMA Royalty Corporation, XRA 3 Corp. agissant comme filiale de fusion. En conséquence, la société inscrite a mis fin aux offres prévues par les déclarations d'enregistrement S-8 et a retiré les actions invendues de l'inscription conformément à ses engagements antérieurs. Les amendements post-efficacité ont été signés par Owen Hughes, Président, Trésorier et Secrétaire.

Turnstone Biologics Corp. hat Nachträge nach dem Wirksamwerden eingereicht, um alle unveräußerten Aktien, die noch unter zwei Registrierungsformularen auf Form S-8 geführt wurden, zurückzuziehen und zu deregistrieren. Das Unternehmen strich insgesamt 7,003,706 unveräußerte Aktien aus der Registrierung, die im Rahmen seines 2018 Equity Incentive Plan, 2023 Equity Incentive Plan und 2023 Employee Stock Purchase Plan reserviert waren.

Die Deregistrierung erfolgt im Anschluss an eine Fusionsvereinbarung, aufgrund derer Turnstone eine vollständig im Eigentum von XOMA Royalty Corporation stehende Tochtergesellschaft wurde, wobei XRA 3 Corp. als Fusionstochter fungierte. Infolgedessen hat die registrierte Gesellschaft die in den S-8-Registrierungsformularen vorgesehenen Angebote eingestellt und die unveräußerten Aktien gemäß ihren früheren Verpflichtungen aus der Registrierung entfernt. Die nach dem Wirksamwerden eingereichten Nachträge wurden von Owen Hughes, Präsident, Schatzmeister und Sekretär, unterzeichnet.

As filed with the Securities and Exchange Commission on August 11, 2025

Registration No. 333-273421

Registration No. 333-279378

 

 
 

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

 

 

POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT NO. 333-273421

POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT NO. 333-279378

FORM S-8

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

 

 

TURNSTONE BIOLOGICS CORP.

(Exact name of registrant as specified in its charter)

 

 

 

Delaware   83-2909368

(State or other jurisdiction of

incorporation or organization)

 

(IRS employer

identification number)

2200 Powell Street, Suite 310

Emeryville, California 94608

(Address of Principal Executive Offices, including Zip Code)

 

 

Turnstone Biologics Corp. 2018 Equity Incentive Plan

Turnstone Biologics Corp. 2023 Equity Incentive Plan

Turnstone Biologics Corp. 2023 Employee Stock Purchase Plan

(Full title of the Plans)

 

 

Owen Hughes

President, Treasurer and Secretary

Turnstone Biologics Corp.

2200 Powell Street, Suite 310

Emeryville, California 94608

Tel. (510) 204-7200

(Name, Address and Telephone Number, including Area Code, of Agent for Service)

Copies to:

Ryan A. Murr

Branden C. Berns

Melanie E. Neary

Gibson, Dunn & Crutcher LLP

One Embarcadero Center Suite 2600

San Francisco, California 94111

(415) 393-8200

Divakar Gupta

Rama Padmanabhan

Courtney Tygesson

Cooley LLP

55 Hudson Yards

New York, New York 10001

(212) 479-6000

 

 

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

 

Large accelerated filer      Accelerated filer  
Non-accelerated filer      Smaller reporting company  
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 7(a)(2)(B) of the Securities Act. ☐

 

 
 


EXPLANATORY NOTE

DEREGISTRATION OF UNSOLD SECURITIES

These Post-Effective Amendments (these “Post-Effective Amendments”) are being filed by Turnstone Biologics Corp., a Delaware corporation (the “Registrant”), to deregister all shares of the Registrant’s common stock, $0.001 par value per share (the “Shares”), remaining unissued under the following Registration Statements on Form S-8 (each, a “Registration Statement”, and collectively, the “Registration Statements”) filed by the Registrant with the U.S. Securities and Exchange Commission (the “SEC”).

 

   

Registration Statement (No. 333-273421) pertaining to the registration of (i) 2,672,573 Shares issuable pursuant to the Registrant’s 2018 Equity Incentive Plan, (ii) 2,722,887 Shares issuable pursuant to the Registrant’s 2023 Equity Incentive Plan (the “2023 Plan”) and (iii) 222,287 Shares issuable pursuant to the Registrant’s 2023 Employee Stock Purchase Plan (the “2023 ESPP”).

 

   

Registration Statement (No. 333-279378) pertaining to the further registration of (i) 1,154,966 additional Shares under the 2023 Plan and (ii) 230,993 additional Shares under the 2023 ESPP.

The Registrant is filing these Post-Effective Amendments to withdraw and remove any unissued and unsold securities issuable by the Registrant pursuant to the above-referenced Registration Statements.

On June 26, 2025, the Registrant entered into an Agreement and Plan of Merger (the “Merger Agreement”) with XOMA Royalty Corporation, a Nevada corporation (“Parent”), and XRA 3 Corp., a Delaware corporation and wholly owned subsidiary of Parent (“Merger Sub”). Pursuant to the Merger Agreement, on August 11, 2025, Merger Sub was merged with and into the Registrant with the Registrant surviving as a wholly owned subsidiary of Parent (the “Merger”).

As a result of the Merger, the Registrant has terminated all offerings of its securities pursuant to the Registration Statements. In accordance with an undertaking made by the Registrant in each of the Registration Statements to remove from registration, by means of a post-effective amendment, any of the securities that had been registered for issuance that remain unsold at the termination of the offerings, the Registrant hereby removes from registration all such securities registered under the Registration Statements that remain unsold as of the date hereof and terminates the effectiveness of the Registration Statements.


SIGNATURE

Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused these Post-Effective Amendments to the Registration Statements to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Emeryville, State of California, on August 11, 2025. No other person is required to sign these Post-Effective Amendments to the Registration Statements in reliance on Rule 478 of the Securities Act of 1933, as amended.

 

TURNSTONE BIOLOGICS CORP.

 

/s/ Owen Hughes

Name: Owen Hughes

Title: President, Treasurer and Secretary

FAQ

What did Turnstone Biologics (TSBX) file with the SEC?

Turnstone filed post-effective amendments to two Form S-8 registration statements to withdraw and deregister all unsold securities previously registered for issuance.

How many shares were removed from registration?

7,003,706 unsold shares were removed from registration in total across the two S-8 registration statements.

Which equity plans were affected by the deregistration?

The deregistration affected the 2018 Equity Incentive Plan, the 2023 Equity Incentive Plan, and the 2023 Employee Stock Purchase Plan.

Why were the securities deregistered?

The securities were removed from registration because Turnstone entered into a merger after which it became a wholly owned subsidiary of XOMA Royalty Corporation and terminated the offerings under those registration statements.

When did the merger making Turnstone a subsidiary occur?

The Merger, under which Turnstone became a wholly owned subsidiary of XOMA Royalty Corporation, was completed on August 11, 2025.

Who signed the post-effective amendments for Turnstone?

The post-effective amendments were signed on behalf of Turnstone by Owen Hughes, President, Treasurer and Secretary.
Turnstone Biologics Corp

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Biotechnology
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