$LRMR

$2.39 +$0.15 (6.7%) Close

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

Ownership

13F as of Q2 2026 · 103.9M shares outstanding

Who owns LRMR?

By type of holder

Institutions 91.6% Insiders 8.4% Everyone else 0.0%

Concentration Top 10 holders own 140.0%

James E. Flynn 34.3% · Deerfield Management Company, L.P. 34.3%

Institutional ownership

91.6%

+7.1 pts vs last qtr

Institutional holders

161

-1 vs last qtr

Net shares bought

+7.4M

by institutions in Q2 2026

New / sold out

31 / 32

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Defilade Capital Management, L.P. NEW +3.7M
Blue Owl Capital Holdings LP +2.0M

Biggest sellers in Q2 2026

AIGH Capital Management LLC SOLD OUT −3.0M
Millennium Management LLC −2.3M

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Larimar Therapeutics, Inc. in the last 12 months.

Is your stake being diluted?

Diluted share count, FY2020–FY2024

+415.5%

+50.68% a year

Each share's claim on the business

−80.6%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $30.7M

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+ years56% 3–5 years6% 1–3 years22% Under 1 year16%

Quarterly turnover

20.0%

of institutional shares changed hands

Top 10 managers, median time held

2.5 years

Super Investors

Investment managers reporting LRMR on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
DM Deerfield Management Company, L.P. 13D · 34.4%	35.6M	34.28%	Unchanged	≤2021	1.1%
Shares held by quarter Peak holding35.6M (Q1'26) Change over 8 quarters+14.4M Share of the company34.280% Disclosed stake13D · 34.4% Deerfield Management Company, L.P.'s full portfolio →
BO Blue Owl Capital Holdings LP	9.2M	8.82%	+2.0M (+28.7%)	2023	4.2%
Shares held by quarter Peak holding9.2M (Q2'26) Change over 8 quarters+5.0M Share of the company8.820% Blue Owl Capital Holdings LP's full portfolio →

Deerfield Management Company, L.P.

13D · 34.4%

35.6M

% of company

34.28%

Change vs last qtr

Unchanged

Held since

≤2021

Blue Owl Capital Holdings LP

9.2M

% of company

8.82%

Change vs last qtr

+2.0M (+28.7%)

Held since

2023

28 more super investors behind a free account

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

Institutional Funds

Mutual funds and ETFs reporting LRMR on Form N-PORT; together they hold 13.8% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$6.73M	2.2M	2.12%	0.00%	June 30, 2026
IR iShares Russell 2000 ETF iShares Trust	$5.26M	1.7M	1.66%	0.01%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$6.73M

% of company

2.12%

% of the fund

0.00%

As of

June 30, 2026

iShares Russell 2000 ETF

iShares Trust

Position value

$5.26M

% of company

1.66%

% of the fund

0.01%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Larimar Therapeutics, 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
JE James E. Flynn 5%+ holder 13D · 34.4%	35.7M	34.33%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company34.330% Disclosed stake13D · 34.4% View the 13D/G filing →
DP Deerfield Private Design Fund IV, L.P. 5%+ holder 13D · 10.3%	10.6M	10.23%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company10.230% Disclosed stake13D · 10.3% View the 13D/G filing →

James E. Flynn

5%+ holder13D · 34.4%

35.7M

% of company

34.33%

Change vs last qtr

—

Held since

—

Deerfield Private Design Fund IV, L.P.

5%+ holder13D · 10.3%

10.6M

% of company

10.23%

Change vs last qtr

—

Held since

—

15 more holders behind a free account

See every insider and 5%+ holder of Larimar Therapeutics, Inc..

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