Larimar Therapeutics, Inc.

LRMR

Exchange: Nasdaq
Industry: Pharmaceutical Preparations
SEC CIK: 0001374690

SEC filings (opens in a new tab)

In the last 90 days, Larimar Therapeutics, Inc. insiders filed 1 open-market purchase and 0 sales; 163 institutions reported holding it in 13F filings for Q2 2026, worth $291.4M in total; no superinvestor holds it.

Q4 2025 vs. Q3 2025

How the institutions holding Larimar Therapeutics, Inc. changed between Q3 2025 and Q4 2025.

All holders in Q4 2025 All holders in Q3 2025

13F holders of LRMR: Q3 2025 compared with Q4 2025
Measure	Q3 2025	Of which not filed for Q4 2025	Q4 2025	Change
Holders	136	3	136	+3
Shares	85.5M	435.1K	72.7M	−12.4M (−14.5%)
Value	$274.8M	$1.41M	$277.0M	+$3.61M (+1.3%)

3 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (22)

Institutions that held Larimar Therapeutics, Inc. at the end of Q4 2025 but not at the end of Q3 2025.

Institutions new to LRMR in Q4 2025
Institution	Shares	Value	% of portfolio
D. E. Shaw & Co., Inc.	437,399	$1.67M	0.00%
Gem Investment Advisors, LLC	280,860	$1.07M	1.01%
Jump Financial, LLC	96,074	$366.0K	0.00%
Canada Pension Plan Investment Board	94,000	$358.1K	0.00%
Acadian Asset Management LLC	64,670	$245.0K	0.00%
Schonfeld Strategic Advisors LLC	61,759	$235.3K	0.00%
EntryPoint Capital, LLC	53,321	$203.2K	0.08%
Graham Capital Management, L.P.	42,255	$161.0K	0.01%
Man Group plc	39,225	$149.4K	0.00%
Squarepoint Ops LLC	30,416	$115.9K	0.00%
Commonwealth Equity Services, LLC	22,848	$87.0K	0.00%
Connor, Clark & Lunn Investment Management Ltd.	21,070	$80.3K	0.00%
SG Americas Securities, LLC	15,757	$60.0K	0.00%
Keystone Financial Group	13,000	$49.5K	0.00%
Two Sigma Securities, LLC	12,392	$47.2K	0.01%
Quadrant Capital Group LLC	1,753	$6.68K	0.00%
GAMMA Investing LLC	1,215	$4.63K	0.00%
Caitong International Asset Management Co., Ltd	1,188	$4.53K	0.00%
Bell Investment Advisors, Inc	773	$2.95K	0.00%
Parallel Advisors, LLC	193	$735	0.00%
Rockefeller Capital Management L.P.	148	$564	0.00%
MAI Capital Management	1	$4	0.00%

Sold out (19)

Institutions that held Larimar Therapeutics, Inc. at the end of Q3 2025 and filed for Q4 2025 without it.

Institutions that sold out of LRMR in Q4 2025
Institution	Shares, Q3 2025	Value, Q3 2025
Ra Capital Management, L.P.	6,045,351	$19.5M
Opaleye Management Inc.	3,720,867	$10.6M
Adage Capital Partners GP, L.L.C.	1,900,000	$6.14M
Mangrove Partners	442,236	$1.43M
Hudson Bay Capital Management LP	403,449	$1.30M
Balyasny Asset Management LLC	286,533	$925.5K
Sphera Funds Management Ltd.	260,385	$841.0K
Group One Trading, L.P.	133,701	$431.9K
Cantor Fitzgerald, L. P.	127,500	$411.8K
Massar Capital Management, LP	117,000	$377.9K
Virtu Financial LLC	102,680	$332.0K
Walleye Capital LLC	54,400	$175.7K
Monimus Capital Management, LP	49,073	$158.5K
Prudential Financial Inc	38,091	$123.0K
Stonepine Capital Management, LLC	25,000	$80.8K
Ellevest, Inc.	18,828	$60.8K
Optiver Holding B.V.	560	$1.81K
Rise Advisors, LLC	381	$1.23K
Larson Financial Group LLC	4	$13

Not filed for Q4 2025 yet (3)

Institutions that held Larimar Therapeutics, Inc. at the end of Q3 2025 and haven't filed a 13F for Q4 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding LRMR in Q3 2025 that haven't filed for Q4 2025
Institution	Shares, Q3 2025	Value, Q3 2025
HAP Trading, LLC	262,776	$848.8K
Cubist Systematic Strategies, LLC	162,159	$523.8K
Point72 (DIFC) Ltd	10,157	$32.8K