What does CUSIP 23255M303 represent in this 13F holders report?

CUSIP 23255M303 is the security identifier for KRSA - Korsana Biosciences, Inc. - Common Stock, no par value used to aggregate holder disclosures.

How many institutions held KRSA - Korsana Biosciences, Inc. - Common Stock, no par value in Q3 2026?

1 institutional investor reported KRSA - Korsana Biosciences, Inc. - Common Stock, no par value for Q3 2026. Use the holders table for investor-level position and value details.

Korsana Biosciences, Inc. - Common Stock, no par value (KRSA)

CUSIP: 23255M303

Q3 2026 13F Holders as of 30 Sep 2026

Security type / class: Equity / Common Stock, no par value
Total 13F shares: 14
Total 13F value: $448
Share change: +14
SEC-reported price per share: $32.00
Number of holders: 1
Value change: +$448
Number of buys: 1
Shares outstanding: 45,576,768

Security key

23255M303

Report period

Q3 2026

Institutions

Top holders

KRSA full security history Ownership snapshot Full 13F holder table Korsana Biosciences, Inc. SEC filings Korsana Biosciences, Inc. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 23255M303

Recent filing periods:

Q3 2026

Ownership snapshot

Top reported holders of KRSA - Korsana Biosciences, Inc. - Common Stock, no par value (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

Fairmount Funds Managemen...

Disclosed value leader

FMR LLC

Comparable rows

11/15

Latest evidence

30 Sep 2026

3/4/5 13D/G 13F Lead comparable stake: 20% 4 rows are not safely comparable across share classes. 13D/G row: Fairmount Funds Management LLC Showing 1-6 of 15 holder rows.

Quick read

Fairmount Funds Management LLC leads the comparable SEC ownership view at 20%.

11 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Fairmount Funds Management LLC's linked filing trail.

Comparable ownership Top 5

Fairmount Funds Management LLC 20%

Peter M. Hecht 19%

Venrock Healthcare Capital Partne... 9.9%

BALYASNY ASSET MANAGEMENT L.P. 7.3%

ADAR1 Capital Management, LLC 7%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Fairmount Funds Management LLC	3/4/5 13D/G Director, 10%+ Owner · Tomas Kiselak 3/4/5 13D/G	20% Reported 13D/G · 08 Sep 2026	$30,861,640 9,152,174 shares mixed-class rows	—	09 Sep 2026
Peter M. Hecht	3/4/5 13D/G Director, 10%+ Owner 3/4/5 13D/G	19% Reported 13D/G · 16 Jul 2026	$3,086,022 910,336 shares mixed-class rows	—	16 Jul 2026
Venrock Healthcare Capital Partners III, L.P.	13D/G 13D/G	9.9% Reported 13D/G · 08 Sep 2026	— 4,552,277 shares	$0	08 Sep 2026
BALYASNY ASSET MANAGEMENT L.P.	13D/G 13F Company 13D/G 13F	7.3% Reported 13D/G · 30 Jun 2026	$1,247,818 317,511 shares	$0	30 Jun 2026
ADAR1 Capital Management, LLC	13D/G 13F Company 13D/G 13F	7% Reported 13D/G · 30 Jun 2026	$1,174,115 298,757 shares	$0	30 Jun 2026
FMR LLC	13D/G 13F Company 13D/G 13F	6.9% Reported 13D/G · 30 Sep 2026	$100,350,472 3,144,797 shares	$0	30 Sep 2026

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q3 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

Rows available

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q3 2026 vs Q2 2026 Across Filers

Q2 2026 holders

Q3 2026 holders

Holder diff

Investor	Q2 2026 Shares	Q3 2026 Shares	Share Diff	Share Chg %	Q2 2026 value	Q3 2026 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend