Larimar Therapeutics LRMR Institutional Ownership

NASDAQ LRMR

$3.20 +0.06 (+1.91%)

As of: Sep 30, 2026 · 3:56 PM EDT

Institutions by Trading Activity

163 Institutions

Increased 101 62.0%

Unchanged 21 12.9%

Reduced 41 25.2%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

92.08%

▼-28.22 pp QoQ

Shares Held by Institutions

95.66Mn

of 103.88Mn outstanding

▲+17.53% QoQ

Shares Outstanding

103.88Mn

8.23Mn held outside 13F filers

Institutional Investors

163

filed 13F for Jun 2026

▲+1 vs prior quarter

Net Shares Added (QoQ)

+14.26Mn

accumulated since last quarter

Value of Holdings

$300.36Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Larimar Therapeutics, Inc. (NASDAQ:LRMR) has 163 institutional investors that have filed 13F reports for the period ending June 2026.

They owned 92.1% of outstanding stock in June 2026, down from 120.3% the prior quarter.
Their total shares held in LRMR increased 17.53% from the prior quarter, while the number of investors in Larimar Therapeutics increased 41.74% year over year.
Of these 163 holders, 101 added to their stakes in Larimar Therapeutics, 41 trimmed positions, and 21 made no changes.
Combined, these investors held 95.66Mn shares in LRMR for June 2026, up by 14.26Mn shares quarter on quarter, and up 34.84Mn shares year over year.
As of June 30, 2026, DEERFIELD MANAGEMENT COMPANY, L.P. held the largest stake in Larimar Therapeutics with 35.61Mn shares, accounting for 34.28% of total shares outstanding.
The most significant purchases of LRMR for the quarter ending June 2026 came from Defilade Capital Management, L.P. (3.67Mn), Blue Owl Capital Holdings LP (2.04Mn), BlackRock, Inc. (1.93Mn), AQR CAPITAL MANAGEMENT LLC (1.55Mn), MARSHALL WACE, LLP (1.08Mn).
Leading sellers of Larimar Therapeutics shares for the quarter ending June 2026 were MILLENNIUM MANAGEMENT LLC (2.29Mn), Point72 Asset Management, L.P. (912.58K), Soleus Capital Management, L.P. (878.86K), Gem Investment Advisors, LLC (534.71K), JANE STREET GROUP, LLC (480.27K).
Business Quant data shows the 10 biggest positions in Larimar Therapeutics as of June 2026 are held by DEERFIELD MANAGEMENT COMPANY, L.P. (35.61Mn), Blue Owl Capital Holdings LP (9.16Mn), BlackRock, Inc. (5.68Mn), Defilade Capital Management, L.P. (3.67Mn), DRIEHAUS CAPITAL MANAGEMENT LLC (3.16Mn), VANGUARD CAPITAL MANAGEMENT LLC (2.97Mn), RTW INVESTMENTS, LP (2.57Mn), AQR CAPITAL MANAGEMENT LLC (2.37Mn), MARSHALL WACE, LLP (2.01Mn), DAFNA Capital Management LLC (2.01Mn).

Form 13F Holdings

162 Institutional Holders

Report period 30 Jun, 2026

Total shares held 95.66Mn

Of outstanding 92.08%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	DEERFIELD MANAGEMENT COMPANY, L.P.	0001009258	35,606,974	34.28%	0	0.00%	$108.60Mn
2	Blue Owl Capital Holdings LP	0001858703	9,163,157	8.82%	▲2,043,150	+28.70%	$27.95Mn
3	BlackRock, Inc.	0002012383	5,678,035	5.47%	▲1,925,835	+51.33%	$17.32Mn
4	Defilade Capital Management, L.P.	0002088557	3,670,135	3.53%	▲3,670,135	0.00%	$11.19Mn
5	DRIEHAUS CAPITAL MANAGEMENT LLC	0000938206	3,163,423	3.05%	▲229,024	+7.80%	$9.65Mn
6	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	2,974,901	2.86%	▲108,552	+3.79%	$9.07Mn
7	RTW INVESTMENTS, LP	0001493215	2,565,999	2.47%	▲1,065,999	+71.07%	$7.83Mn
8	AQR CAPITAL MANAGEMENT LLC	0001167557	2,371,414	2.28%	▲1,553,897	+190.08%	$7.23Mn
9	MARSHALL WACE, LLP	0001318757	2,012,458	1.94%	▲1,078,994	+115.59%	$6.14Mn
10	DAFNA Capital Management LLC	0001389933	2,008,164	1.93%	▼21,000	-1.03%	$6.12Mn
11	Goldman Sachs Group Inc	0000886982	1,752,910	1.69%	▲191,325	+12.25%	$5.35Mn
12	GEODE CAPITAL MANAGEMENT, LLC	0001214717	1,679,003	1.62%	▲570,242	+51.43%	$5.12Mn
13	Qube Research & Technologies Ltd	0001729829	1,641,042	1.58%	▲793,398	+93.60%	$5.01Mn
14	CITADEL ADVISORS LLC	0001423053	1,456,825	1.40%	▲937,693	+180.63%	$4.44Mn
15	State Street Corp	0000093751	1,411,804	1.36%	▲500,478	+54.92%	$4.31Mn
16	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	1,403,172	1.35%	▲996,614	+245.13%	$4.28Mn
17	Woodline Partners LP	0001784547	1,400,850	1.35%	0	0.00%	$4.27Mn
18	MILLENNIUM MANAGEMENT LLC	0001273087	1,333,037	1.28%	▼2,292,241	-63.23%	$4.07Mn
19	DIMENSIONAL FUND ADVISORS LP	0000354204	961,083	0.93%	▲162,621	+20.37%	$2.93Mn
20	FMR LLC	0000315066	937,368	0.90%	▲873,798	+1,374.54%	$2.86Mn

Showing 1 to 20 of 162 holders