Latest Period
Q1 2026
Security Snapshot
Larimar Therapeutics, Inc. - Common Stock, par value $0.001 per share (LRMR) Institutional Ownership
CUSIP: 517125100
13F Institutional Holders and Ownership History from Q2 2020 to Q1 2026
Institutions Reporting
162
Shares (Excl. Options)
87,757,044
Price
$4.50
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- Security type / class
- Equity / Common Stock, par value $0.001 per share
- Symbol
- LRMR on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 87,757,044
- Total 13F value
- $394,797,184
- Portfolio coverage rank
- 0%
- Share change
- +14,485,590
- Value change
- +$65,817,605
- Number of holders
- 162
- Shares outstanding
- 107,502,422
- SEC-reported price per share
- $4.10
- Insider filing price
- $4.10
Latest holder snapshot
5 signals
Issuer context
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- LRMR - Larimar Therapeutics, Inc. - Common Stock, par value $0.001 per share is tracked under CUSIP 517125100.
- 162 institutions reported positions in Q1 2026.
- 6 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 137 to 162 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $277,008,552 to $394,797,184.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 162 institutions filings for Q1 2026.
Security key
517125100
Latest holder period
Q1 2026
13F holders
162
13D/G owners
6
CIK / CUSIP context first
Open Q1 2026 holders
LRMR full holder history
Larimar Therapeutics, Inc. SEC filings
Larimar Therapeutics, Inc. company facts
Larimar Therapeutics, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 517125100:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
6
Security
LRMR
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Flynn James E | 34% | -3.9% | $123,052,785 | +$17,250,000 | 35,667,474 | +16% | Deerfield Management Company, L.P. | 27 Feb 2026 |
| Blue Owl Capital Holdings LP | 10% | 0% | $54,234,435 | +$11,487,886 | 10,739,492 | +27% | Blue Owl Capital Holdings LP | 31 Mar 2026 |
| Opaleye Management Inc. | 4.8% | -23% | $15,412,500 | +$590,966 | 4,110,000 | +4% | Opaleye Management, Inc. | 29 Aug 2025 |
| MILLENNIUM MANAGEMENT LLC | 3.5% | -38% | $16,313,751 | -$6,036,988 | 3,625,278 | -27% | Millennium Management LLC | 31 Mar 2026 |
| BlackRock, Inc. | 4.8% | -6% | $7,175,619 | -$433,939 | 3,079,665 | -5.7% | BlackRock, Inc. | 31 Mar 2025 |
| GOLDMAN SACHS GROUP INC | 4.1% | $6,058,491 | 2,600,211 | THE GOLDMAN SACHS GROUP, INC. | 31 Mar 2025 |
As of 31 Mar 2026, 162 institutional investors reported holding 87,757,044 shares of Larimar Therapeutics, Inc. - Common Stock, par value $0.001 per share (LRMR). This represents 82% of the company’s total 107,502,422 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
73%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| DEERFIELD MANAGEMENT COMPANY, L.P. | 33% | 35,606,974 | +16% | 1.9% | $160,231,383 |
| Blue Owl Capital Holdings LP | 6.6% | 7,120,007 | +4.3% | 8.6% | $32,040,032 |
| BlackRock, Inc. | 3.5% | 3,752,200 | +1.9% | 0% | $16,884,902 |
| MILLENNIUM MANAGEMENT LLC | 3.4% | 3,625,278 | -30% | 0.01% | $16,313,751 |
| AIGH Capital Management LLC | 2.8% | 3,000,000 | +50% | 2.8% | $13,500,001 |
| Driehaus Capital Management LLC | 2.7% | 2,934,399 | +448% | 0.1% | $13,204,796 |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.7% | 2,866,349 | 0% | 0% | $12,898,571 |
| DAFNA Capital Management LLC | 1.9% | 2,029,164 | +116% | 2.1% | $9,131,238 |
| GOLDMAN SACHS GROUP INC | 1.5% | 1,561,585 | +16% | 0% | $7,027,133 |
| RTW INVESTMENTS, LP | 1.4% | 1,500,000 | -52% | 0.07% | $6,750,000 |
| Deep Track Capital, LP | 1.4% | 1,500,000 | 0.14% | $6,750,000 | |
| Woodline Partners LP | 1.3% | 1,400,850 | +75% | 0.02% | $6,303,825 |
| GEODE CAPITAL MANAGEMENT, LLC | 1% | 1,108,761 | +1.4% | 0% | $4,990,753 |
| Soleus Capital Management, L.P. | 0.99% | 1,066,960 | 0.19% | $4,801,320 | |
| Point72 Asset Management, L.P. | 0.97% | 1,047,385 | -28% | 0.01% | $4,713,233 |
| MARSHALL WACE, LLP | 0.87% | 933,464 | 0% | $4,200,591 | |
| STATE STREET CORP | 0.85% | 911,326 | -0.07% | 0% | $4,100,967 |
| Gem Investment Advisors, LLC | 0.79% | 854,230 | +204% | 3.8% | $3,844,035 |
| Qube Research & Technologies Ltd | 0.79% | 847,644 | 0.01% | $3,814,398 | |
| AQR CAPITAL MANAGEMENT LLC | 0.76% | 817,517 | +63% | 0% | $3,678,828 |
| DIMENSIONAL FUND ADVISORS LP | 0.74% | 798,462 | +144% | 0% | $3,591,819 |
| RENAISSANCE TECHNOLOGIES LLC | 0.69% | 739,942 | +149% | 0.01% | $3,329,739 |
| Nuveen, LLC | 0.63% | 674,915 | +542% | 0% | $3,037,119 |
| Caption Management, LLC | 0.59% | 635,024 | +53% | 0.14% | $2,857,608 |
| Alyeska Investment Group, L.P. | 0.57% | 617,211 | -33% | 0.01% | $2,777,450 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
24
Latest
Q1 2026
Rows shown
1-24 of 24
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 87,757,044 | $394,797,184 | +$65,817,605 | $4.50 | 162 |
| 2025 Q4 | 72,707,274 | $277,008,552 | -$38,772,086 | $3.81 | 137 |
| 2025 Q3 | 85,496,565 | $274,794,131 | +$75,244,593 | $3.23 | 135 |
| 2025 Q2 | 62,321,311 | $180,120,860 | +$7,437,034 | $2.89 | 116 |
| 2025 Q1 | 60,827,153 | $131,864,050 | -$12,271,759 | $2.15 | 101 |
| 2024 Q4 | 63,434,614 | $245,492,888 | -$5,894,960 | $3.87 | 115 |
| 2024 Q3 | 64,329,070 | $421,287,622 | -$5,929,383 | $6.55 | 122 |
| 2024 Q2 | 65,308,461 | $473,379,696 | +$12,179,883 | $7.25 | 105 |
| 2024 Q1 | 63,594,662 | $482,627,362 | +$182,781,336 | $7.59 | 102 |
| 2023 Q4 | 39,456,509 | $179,551,948 | +$15,220,703 | $4.55 | 69 |
| 2023 Q3 | 38,745,394 | $153,032,401 | -$3,458,223 | $3.95 | 63 |
| 2023 Q2 | 39,027,692 | $120,194,716 | -$3,770,373 | $3.13 | 65 |
| 2023 Q1 | 38,462,442 | $174,244,129 | +$1,086,191 | $4.53 | 68 |
| 2022 Q4 | 38,766,976 | $160,093,910 | +$976,279 | $4.13 | 47 |
| 2022 Q3 | 38,715,175 | $123,902,000 | +$77,822,908 | $3.20 | 52 |
| 2022 Q2 | 14,391,311 | $28,222,000 | -$2,241,518 | $1.96 | 34 |
| 2022 Q1 | 15,257,103 | $61,778,000 | -$2,584,495 | $4.05 | 40 |
| 2021 Q4 | 14,567,301 | $157,170,000 | -$456,088 | $10.79 | 47 |
| 2021 Q3 | 14,519,322 | $167,488,004 | +$199,976 | $11.53 | 50 |
| 2021 Q2 | 14,543,964 | $142,828,000 | -$4,477,645 | $9.82 | 42 |
| 2021 Q1 | 14,110,404 | $206,147,000 | -$8,290,625 | $14.61 | 53 |
| 2020 Q4 | 14,252,270 | $305,135,000 | +$10,378,818 | $21.41 | 42 |
| 2020 Q3 | 13,625,016 | $206,745,000 | +$10,359,632 | $15.17 | 37 |
| 2020 Q2 | 12,953,044 | $166,142,000 | +$166,142,000 | $12.85 | 34 |