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Korsana Biosciences: General Atlantic holds 6.8%

General Atlantic-affiliated funds report a 6.8% beneficial stake in Korsana Biosciences, largely via shares and a sizable pre-funded warrant position.

(Neutral)
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Form Type
SCHEDULE 13G

Rhea-AI Filing Summary

Korsana Biosciences, Inc. (CYCN) has a new large shareholder group led by General Atlantic investment entities, which together report beneficial ownership of 3,201,131 shares of common stock, representing 6.8% of the company. The position is held through General Atlantic (KB), L.P., which owns 1,366,242 shares of common stock and a Pre-Funded Warrant to purchase an additional 1,834,889 shares.

The 6.8% ownership is calculated against an aggregate base of 47,376,314 shares, including shares issuable upon warrant exercise. Multiple General Atlantic partnerships and co-investment vehicles may be deemed to share voting and dispositive power, and warrant exercises are limited by a 9.99% beneficial-ownership blocker.

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Beneficially owned shares 3,201,131 shares Shares of Korsana Biosciences common stock beneficially owned by General Atlantic reporting group
Common shares held 1,366,242 shares Common stock of Korsana Biosciences owned of record by General Atlantic (KB), L.P.
Pre-Funded Warrant underlying shares 1,834,889 shares Shares of common stock issuable upon exercise of the Pre-Funded Warrant held by General Atlantic (KB), L.P.
Percent of class 6.8% Ownership percentage of Korsana Biosciences common stock attributed to the reporting persons
Aggregate shares for ownership base 47,376,314 shares Total shares used for percentage calculation, including shares issuable upon warrant exercise
Shares outstanding (excluding warrant) 45,541,425 shares Common shares reported issued and outstanding as of September 8, 2026
Beneficial ownership blocker 9.99% Maximum beneficial ownership allowed before pre-funded warrant exercises are blocked
Pre-Funded Warrant financial
"and a pre-funded warrant (the "Pre-Funded Warrant") to purchase 1,834,889"
A pre-funded warrant is a financial instrument that gives the holder the right to buy shares of a company's stock at a set price, with most of the purchase cost already paid upfront. It functions like a nearly fully paid option, allowing investors to secure shares quickly while minimizing the amount of additional money they need to invest later. This helps investors gain ownership rights efficiently, often used to avoid certain regulatory restrictions or to prepare for future stock purchases.
beneficially own financial
"each of the Reporting Persons may be deemed to beneficially own the shares"
Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.
blocker provision financial
"subject to a blocker provision that will prohibit the Reporting Persons from exercising"
Schedule 13G regulatory
"This Statement is being filed on behalf of each of the following persons"
A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.
percent of class financial
"(b) | Percent of class: The percentages used herein are calculated based upon"
Percent of class is the portion of a specific category of securities—such as a company’s common shares, preferred shares, or a bond series—that takes part in or approves a corporate action (vote, consent, tender, etc.). Investors watch this number because it reveals how much support or opposition exists within that particular shareholder group; like counting how many members of a club back a proposal, it can determine whether a plan passes or how influence is distributed.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stake do General Atlantic entities report in Korsana Biosciences (CYCN)?

General Atlantic-affiliated funds report beneficial ownership of 3,201,131 shares of Korsana Biosciences common stock, representing 6.8% of the company’s common shares, including shares issuable upon exercise of a pre-funded warrant.

How many Korsana Biosciences (CYCN) shares does General Atlantic (KB), L.P. hold?

General Atlantic (KB), L.P. holds 1,366,242 shares of Korsana Biosciences common stock and a Pre-Funded Warrant to purchase 1,834,889 additional shares of common stock.

What percentage of Korsana Biosciences (CYCN) does the reported 3,201,131 shares represent?

The 3,201,131 shares beneficially owned by the General Atlantic group represent 6.8% of Korsana Biosciences’ common stock, based on an aggregate of 47,376,314 shares including shares underlying the pre-funded warrant.

What is the blocker provision on the pre-funded warrant held in Korsana Biosciences (CYCN)?

The pre-funded warrant held by General Atlantic (KB), L.P. includes a 9.99% beneficial ownership blocker that prohibits exercise if it would cause any reporting person to beneficially own more than 9.99% of Korsana’s outstanding common stock.

How many Korsana Biosciences (CYCN) shares were outstanding for the 6.8% calculation?

The 6.8% ownership is based on 47,376,314 shares of Korsana Biosciences common stock, consisting of 45,541,425 shares reported outstanding plus 1,834,889 shares issuable upon exercise of the pre-funded warrant.

Which entities are part of the General Atlantic group holding CYCN shares?

The reporting group includes General Atlantic, L.P., multiple General Atlantic Partners and GAP Coinvestment entities, Bermuda and Luxembourg partnerships and LLCs, with General Atlantic (KB), L.P. holding the shares and pre-funded warrant of Korsana Biosciences.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Learn about SEC filing dates





23255M303

(CUSIP Number)
09/08/2026

(Date of Event Which Requires Filing of this Statement)


Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)




schemaVersion:


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SCHEDULE 13G



GENERAL ATLANTIC, L.P.
Signature:/s/ Michael Gosk
Name/Title:Michael Gosk, Managing Director
Date:09/18/2026
General Atlantic Partners 100, L.P.
Signature:/s/ Michael Gosk
Name/Title:Michael Gosk, Managing Director of General Atlantic, L.P., the general partner of General Atlantic GenPar, L.P., its general partner
Date:09/18/2026
GAP Coinvestments III, LLC
Signature:/s/ Michael Gosk
Name/Title:Michael Gosk, Managing Director of General Atlantic, L.P., its managing member
Date:09/18/2026
GAP Coinvestments IV, LLC
Signature:/s/ Michael Gosk
Name/Title:Michael Gosk, Managing Director of General Atlantic, L.P., its managing member
Date:09/18/2026
GAP Coinvestments V, LLC
Signature:/s/ Michael Gosk
Name/Title:Michael Gosk, Managing Director of General Atlantic, L.P., its managing member
Date:09/18/2026
GAP Coinvestments CDA, L.P.
Signature:/s/ Michael Gosk
Name/Title:Michael Gosk, Managing Director of General Atlantic, L.P., its general partner
Date:09/18/2026
GAP Coinvestments PE Holdco, L.P.
Signature:/s/ Michael Gosk
Name/Title:Michael Gosk, Managing Director of GAP Holdings GP, LLC, the general partner of GAP Coinvestments PE Holdco GP, L.P., its general partner
Date:09/18/2026
GAP Coinvestments PE Holdco GP, L.P.
Signature:/s/ Michael Gosk
Name/Title:Michael Gosk, Managing Director of GAP Holdings GP, LLC, its general partner
Date:09/18/2026
GAP Holdings GP, LLC
Signature:/s/ Michael Gosk
Name/Title:Michael Gosk, Managing Director
Date:09/18/2026
General Atlantic (SPV) GP, LLC
Signature:/s/ Michael Gosk
Name/Title:Michael Gosk, Managing Director of General Atlantic, L.P., its sole member
Date:09/18/2026
General Atlantic GenPar (Bermuda), L.P.
Signature:/s/ Michael Gosk
Name/Title:Michael Gosk, Managing Director of GAP (Bermuda) GP Limited, the general partner of GAP (Bermuda) L.P., its general partner
Date:09/18/2026
General Atlantic GenPar, L.P.
Signature:/s/ Michael Gosk
Name/Title:Michael Gosk, Managing Director of General Atlantic, L.P., its general partner
Date:09/18/2026
General Atlantic (KB), L.P.
Signature:/s/ Michael Gosk
Name/Title:Michael Gosk, Managing Director of General Atlantic, L.P., the sole member of General Atlantic (SPV) GP, LLC, its general partner
Date:09/18/2026
GAP (Bermuda) L.P.
Signature:/s/ Michael Gosk
Name/Title:Michael Gosk, Managing Director of GAP (Bermuda) GP Limited, its general partner
Date:09/18/2026
General Atlantic (Lux) S.a r.l.
Signature:/s/ Ingrid van der Hoorn
Name/Title:Ingrid van der Hoorn, Manager A
Date:09/18/2026
Signature:/s/ William Blackwell
Name/Title:William Blackwell, Manager B
Date:09/18/2026
General Atlantic GenPar (Lux) SCSp
Signature:/s/ Ingrid van der Hoorn
Name/Title:Ingrid van der Hoorn, Manager A of General Atlantic (Lux) S.a r.l., its general partner
Date:09/18/2026
Signature:/s/ William Blackwell
Name/Title:William Blackwell, Manager B of General Atlantic (Lux) S.a r.l., its general partner
Date:09/18/2026
General Atlantic Partners (Lux) SCSp
Signature:/s/ Ingrid van der Hoorn
Name/Title:Ingrid van der Hoorn, Manager A of General Atlantic (Lux) S.a r.l., the general partner of General Atlantic GenPar (Lux) SCSp, its general partner
Date:09/18/2026
Signature:/s/ William Blackwell
Name/Title:William Blackwell, Manager B of General Atlantic (Lux) S.a r.l., the general partner of General Atlantic GenPar (Lux) SCSp, its general partner
Date:09/18/2026
Exhibit Information

Exhibit 1 - Joint Filing Agreement as required by Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended.

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