$KRSA

$30.22 +$0.11 (0.37%) Close

$KRSA Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 4.7M shares outstanding

Who owns KRSA?

By type of holder

Institutions 70.5% Insiders 29.5% Everyone else 0.0%

Concentration Top 10 holders own 1314.5%

Tomas Kiselak 194.5% · Fairmount Funds Management LLC 194.5%

Institutional ownership

70.5%

+67.0 pts vs last qtr

Institutional holders

+4 vs last qtr

Net shares bought

+3.1M

by institutions in Q2 2026

New / sold out

9 / 5

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Kalehua Capital Management LLC NEW +1.7M
FMR LLC +644.8K

Biggest sellers in Q2 2026

Geode Capital Management, LLC −38.7K
Kovack Advisors, Inc. SOLD OUT −10.0K

Who is planning to sell?

Notices of proposed sale, last 12 months

$285K

4 notices from 2 people

Shares covered

8.2K

0.18% of the company

Arranged in advance

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Errol B De Souza Director $250K
Michael Higgins Director $35.4K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2021–FY2025

+46.3%

+9.97% a year

Each share's claim on the business

−31.6%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $18M

over 5 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years23% 3–5 years0% 1–3 years0% Under 1 year77%

Quarterly turnover

998.9%

of institutional shares changed hands

Top 10 managers, median time held

0 quarters

Super Investors

Investment managers reporting KRSA on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
KC Kalehua Capital Management LLC	1.7M	35.28%	NEW	Q2 '26	4.0%
Shares held by quarter Peak holding1.7M (Q2'26) Change over 8 quarters+1.7M Share of the company35.280% Kalehua Capital Management LLC's full portfolio →
F FMR LLC	649.5K	13.88%	+644.8K (+13603.5%)	≤2021	0.0%
Shares held by quarter Peak holding649.5K (Q2'26) Change over 8 quarters+491.9K Share of the company13.880% FMR LLC's full portfolio →

Kalehua Capital Management LLC

1.7M

% of company

35.28%

Change vs last qtr

NEW

Held since

Q2 '26

FMR LLC

649.5K

% of company

13.88%

Change vs last qtr

+644.8K (+13603.5%)

Held since

≤2021

24 more super investors behind a free account

See every manager holding Korsana Biosciences, Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting KRSA on Form N-PORT; together they hold 10.1% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
FG Fidelity Growth Company Fund Fidelity Mt. Vernon Street Trust	$802K	218.0K	4.66%	0.00%	August 31, 2026
FG Fidelity Growth Company K6 Fund Fidelity Mt. Vernon Street Trust	$223K	60.7K	1.30%	0.00%	August 31, 2026

Fidelity Growth Company Fund

Fidelity Mt. Vernon Street Trust

Position value

$802K

% of company

4.66%

% of the fund

0.00%

As of

August 31, 2026

Fidelity Growth Company K6 Fund

Fidelity Mt. Vernon Street Trust

Position value

$223K

% of company

1.30%

% of the fund

0.00%

As of

August 31, 2026

14 more funds behind a free account

See every fund holding Korsana Biosciences, Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
TK Tomas Kiselak 5%+ holder 13D · 20.0%	9.1M	194.53%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company194.530% Disclosed stake13D · 20.0% View the 13D/G filing →
FF Fairmount Funds Management LLC 5%+ holder 13D · 20.0%	9.1M	194.47%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company194.470% Disclosed stake13D · 20.0% View the 13D/G filing →

Tomas Kiselak

5%+ holder13D · 20.0%

9.1M

% of company

194.53%

Change vs last qtr

—

Held since

—

Fairmount Funds Management LLC

5%+ holder13D · 20.0%

9.1M

% of company

194.47%

Change vs last qtr

—

Held since

—

16 more holders behind a free account

See every insider and 5%+ holder of Korsana Biosciences, Inc..

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