Skip to main content
LRMR logo

LRMR · Larimar Therapeutics, Inc. · Shareholders & Ownership

Track LRMR — free
$2.25 -0.03 (-1.10%)
Market Cap
$235.81M
Shares
103.88M
Volume · Oct 23 280.79K Avg daily vol (3M) 1.33M

Every disclosed holder of LRMR in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

Who Owns LRMR

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions
Holder group Shares % Out
Institutional (13F) 95,603,919 92.03%
Insiders (Forms 3, 4, 5) 1,823,956 1.76%
13D/G-only blocks 4,704,067 4.53%
Remaining 1,750,995 1.69%
Registered funds (N-PORT, not summed) 13,245,331 12.75%

Shares outstanding: 103,882,937, the issuer's latest cover-page count restated onto today's split basis.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of LRMR

# Holder Shares
1
Deerfield Management Company, L.P.
13D CIK 1352546 · Unknown · Feb 27, 2026
not summed
35,667,474
1.1
Flynn James E
Insider CIK 1352546 · Feb 27, 2026
10% Owner, issuer-wide, not summed
35,606,974
2
DEERFIELD MANAGEMENT COMPANY, L.P.
13F CIK 1009258 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
35,606,974
3
Blue Owl Capital Holdings LP
13F CIK 1858703 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
9,163,157
4
BlackRock, Inc.
13F CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
5,678,035
4.1
iShares Russell 2000 ETF
Fund S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
1,724,694
4.2
iShares Russell 2000 Growth ETF
Fund S000004343 · Registered fund · Jun 30, 2026
iShares Trust, not summed
625,151
4.3
iShares Biotechnology ETF
Fund S000004350 · Registered fund · Jun 30, 2026
iShares Trust, not summed
370,517
4.4
iShares Micro-Cap ETF
Fund S000004439 · Registered fund · Jun 30, 2026
iShares Trust, not summed
223,612
4.5
Master Small Cap Index Series
Fund S000002716 · Registered fund · Jun 30, 2026
Quantitative Master Series LLC, not summed
124,437
5
Opaleye Management Inc.
13G CIK 1595855 · Registered investment adviser · Aug 29, 2025
Rule 13d-1(c), passive investor
4,110,000
6
Defilade Capital Management, L.P.
13F CIK 2088557 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
3,670,135
7
Driehaus Capital Management LLC
13F CIK 938206 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
3,163,423
7.1
Driehaus Micro Cap Growth Fund
Fund S000042829 · Registered fund · Jun 30, 2026
Driehaus Mutual Funds, not summed
338,986
8
VANGUARD CAPITAL MANAGEMENT LLC
13F CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,974,901
9
RTW INVESTMENTS, LP
13F CIK 1493215 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,565,999
10
AQR CAPITAL MANAGEMENT LLC
13F CIK 1167557 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,371,414
10.1
AQR Small Cap Multi-Style Fund
Fund S000040064 · Registered fund · Jun 30, 2026
AQR Funds, not summed
76,263
11
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
2,206,446
12
MARSHALL WACE, LLP
13F CIK 1318757 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,012,458
13
DAFNA Capital Management LLC
13F CIK 1389933 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,008,164
14
GOLDMAN SACHS GROUP INC
13F CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
1,752,910
14.1
Goldman Sachs Small Cap Growth Insights Fund
Fund S000014930 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
23,226
14.2
Goldman Sachs Small Cap Equity Insights Fund
Fund S000009329 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
22,859
14.3
Goldman Sachs Absolute Return Tracker Fund
Fund S000020314 · Registered fund · Jun 30, 2026
GOLDMAN SACHS TRUST, not summed
6,643
15
GEODE CAPITAL MANAGEMENT, LLC
13F CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,679,003
16
Qube Research & Technologies Ltd
13F CIK 1729829 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,641,042
17
CITADEL ADVISORS LLC
13F CIK 1423053 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,456,825
18
STATE STREET CORP
13F CIK 93751 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
1,411,804
18.1
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
19,500
18.2
State Street Total Return V.I.S. Fund
Fund S000001637 · Registered fund · Jun 30, 2026
STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
1,894
19
VANGUARD PORTFOLIO MANAGEMENT LLC
13F CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,403,172
20
Woodline Partners LP
13F CIK 1784547 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,400,850
21
MILLENNIUM MANAGEMENT LLC
13F CIK 1273087 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,333,037
22
DIMENSIONAL FUND ADVISORS LP
13F CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
961,083
22.1
Dimensional U.S. Small Cap ETF
Fund S000070906 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
340,789
22.2
U.S. MICRO CAP PORTFOLIO
Fund S000000948 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
134,273
22.3
Dimensional U.S. Core Equity 2 ETF
Fund S000070903 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
105,245
22.4
U.S. SMALL CAP PORTFOLIO
Fund S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
101,888
22.5
U.S. VECTOR EQUITY PORTFOLIO
Fund S000000982 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
33,404
23
FMR LLC
13F CIK 315066 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
937,368
23.1
Fidelity Enhanced Small Cap Core ETF
Fund S000081807 · Registered fund · Jun 30, 2026
Fidelity Covington Trust, not summed
814,618
23.2
Fidelity Small Cap Index Fund
Fund S000033638 · Registered fund · Jul 31, 2026
Fidelity Salem Street Trust, not summed
726,517
23.3
Fidelity Extended Market Index Fund
Fund S000006021 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
218,451
23.4
VIP Disciplined Small Cap Portfolio
Fund S000007725 · Registered fund · Jun 30, 2026
Variable Insurance Products Fund II, not summed
99,391
23.5
Fidelity Total Market Index Fund
Fund S000006026 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
73,253
24
SPHERA FUNDS MANAGEMENT LTD.
13F CIK 1496201 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
926,004
25
Nuveen, LLC
13F CIK 1871926 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
895,304
25.1
College Retirement Equities Fund - Total Global Stock Account
Fund S000005080 · Registered fund · Jun 30, 2026
College Retirement Equities Fund, not summed
757,603
25.2
Nuveen Small Cap Blend Index Fund
Fund S000005367 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
88,924
25.3
Nuveen Equity Index Fund
Fund S000005360 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
37,235
25.4
Nuveen Life Stock Index Fund
Fund S000005094 · Registered fund · Jun 30, 2026
TIAA-CREF Life Funds, not summed
969
26
Hamilton Thomas Edward
Insider CIK 1769848 · Jul 6, 2026
Director, issuer-wide
874,231
27
VANGUARD EXTENDED MARKET INDEX FUND
Fund S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
699,471
28
VANGUARD EXPLORER FUND
Fund S000002578 · Registered fund · Jul 31, 2026
VANGUARD EXPLORER FUND, not summed
659,133
29
Alyeska Investment Group, L.P.
13F CIK 1453072 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
617,211
30
Verition Fund Management LLC
13G CIK 1454027 · Registered investment adviser · Sep 30, 2024
Rule 13d-1(b), qualified institution
594,067
31
Hennion & Walsh Asset Management, Inc.
13F CIK 1861642 · Investment adviser · Sep 30, 2026
570,361
32
NORTHERN TRUST CORP
13F CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
550,266
32.1
Small Cap Index Fund
Fund S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
34,598
32.2
Small Cap Core Fund
Fund S000001244 · Registered fund · Jun 30, 2026
Northern Funds, not summed
375
33
BEN-MAIMON CAROLE
Insider CIK 1529611 · Jan 26, 2026
Director, President and CEO, issuer-wide
524,054
34
VANGUARD FIDUCIARY TRUST CO
13F CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
448,168
35
LOS ANGELES CAPITAL MANAGEMENT LLC
13F CIK 1177206 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
399,542
36
SummitTX Capital, L.P.
13F CIK 2052310 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
352,284
37
JPMORGAN CHASE & CO
13F CIK 19617 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
328,015
38
Gem Investment Advisors, LLC
13F CIK 1580018 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
319,519
39
Burkehill Global Management, LP
13F CIK 1904549 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
300,000
40
RENAISSANCE TECHNOLOGIES LLC
13F CIK 1037389 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
297,443
41
ADAR1 Capital Management, LLC
13F CIK 1940272 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
272,745
42
Cerity Partners LLC
13F CIK 1566475 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
271,582
43
VANGUARD RUSSELL 2000 INDEX FUND
Fund S000030003 · Registered fund · May 31, 2026
VANGUARD SCOTTSDALE FUNDS, not summed
243,097
44
TWO SIGMA INVESTMENTS, LP
13F CIK 1179392 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
236,133
45
Seven Fleet Capital Management LP
13F CIK 2092021 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
230,921
46
Celano Michael
Insider CIK 1377582 · Jan 26, 2026
Director, issuer-wide
215,785
47
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
206,969
47.1
Schwab Small-Cap Index Fund
Fund S000005912 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
162,130
47.2
Schwab Total Stock Market Index Fund
Fund S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
44,839
48
IEQ CAPITAL, LLC
13F CIK 1779789 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
203,363
49
Caption Management, LLC
13F CIK 1706766 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
193,018
50
Soleus Capital Management, L.P.
13F CIK 1802630 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
188,102

24 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 237 holders

Create a free account to page through every holder, filter by source and group by ultimate parent.

Key facts CIK 1374690 CUSIP 517125100 13F (30d) 15 filings 15 filers Visit website Investor relations