LARIMAR THERAPEUTICS INC (LRMR) Top Institutional Shareholders
LARIMAR THERAPEUTICS INC (LRMR) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $393.42M in LRMR holdings during the latest filing period.
Deerfield Management Company, L.P. is currently the largest disclosed institutional shareholder of LRMR tracked by InsiderSet, reporting ownership valued at approximately $160.23M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $126.05M, representing an estimated loss of -21.33% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 73% of the total disclosed LRMR value among the investors covered in this analysis. Major shareholders include Deerfield Management Company, L.P., Blue Owl Capital Holdings Lp, Blackrock, Inc., and several other long-term asset managers with concentrated positions in LARIMAR THERAPEUTICS INC (LRMR).
This page ranks the largest institutional LRMR shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
160
Total Reported Value
$393.42M
Largest Holder
Deerfield Management Company, L.P.
Largest Position
$160.23M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
177
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Deerfield Management Company, L.P. | 1.89% | 35,606,974 | $160,231,383 | $126,048,688 | -$34,182,695 | -21.33% | |
| Blue Owl Capital Holdings Lp | 8.61% | 7,120,007 | $32,040,032 | $25,204,825 | -$6,835,207 | -21.33% | |
| Blackrock, Inc. | 0.00% | 3,752,200 | $16,884,902 | $13,282,788 | -$3,602,114 | -21.33% | |
| Millennium Management Llc | 0.01% | 3,625,278 | $16,313,751 | $12,833,484 | -$3,480,267 | -21.33% | |
| Aigh Capital Management Llc | 2.76% | 3,000,000 | $13,500,001 | $10,620,000 | -$2,880,001 | -21.33% | |
| Driehaus Capital Management Llc | 0.10% | 2,934,399 | $13,204,796 | $10,387,772 | -$2,817,024 | -21.33% | |
| Vanguard Capital Management Llc | 0.00% | 2,866,349 | $12,898,571 | $10,146,875 | -$2,751,696 | -21.33% | |
| Dafna Capital Management Llc | 2.08% | 2,029,164 | $9,131,238 | $7,183,241 | -$1,947,997 | -21.33% | |
| Goldman Sachs Group Inc | 0.00% | 1,561,585 | $7,027,133 | $5,528,011 | -$1,499,122 | -21.33% | |
| Deep Track Capital, Lp | 0.14% | 1,500,000 | $6,750,000 | $5,310,000 | -$1,440,000 | -21.33% | |
| Rtw Investments, Lp | 0.07% | 1,500,000 | $6,750,000 | $5,310,000 | -$1,440,000 | -21.33% | |
| Woodline Partners Lp | 0.02% | 1,400,850 | $6,303,825 | $4,959,009 | -$1,344,816 | -21.33% | |
| Geode Capital Management, Llc | 0.00% | 1,108,761 | $4,990,753 | $3,925,014 | -$1,065,739 | -21.35% | |
| Gem Investment Advisors, Llc | 2.37% | 1,135,090 | $4,914,112 | $4,018,219 | -$895,893 | -18.23% | |
| Soleus Capital Management, L.P. | 0.19% | 1,066,960 | $4,801,320 | $3,777,038 | -$1,024,282 | -21.33% | |
| Point72 Asset Management, L.P. | 0.01% | 1,047,385 | $4,713,233 | $3,707,743 | -$1,005,490 | -21.33% | |
| Marshall Wace, Llp | 0.00% | 933,464 | $4,200,591 | $3,304,463 | -$896,128 | -21.33% | |
| State Street Corp | 0.00% | 911,326 | $4,100,967 | $3,226,094 | -$874,873 | -21.33% | |
| Qube Research & Technologies Ltd | 0.01% | 847,644 | $3,814,398 | $3,000,660 | -$813,738 | -21.33% | |
| Aqr Capital Management Llc | 0.00% | 817,517 | $3,678,828 | $2,894,010 | -$784,818 | -21.33% | |
| Dimensional Fund Advisors Lp | 0.00% | 798,462 | $3,591,819 | $2,826,555 | -$765,264 | -21.31% | |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 739,942 | $3,329,739 | $2,619,395 | -$710,344 | -21.33% |
| Nuveen, Llc | 0.00% | 674,915 | $3,037,119 | $2,389,199 | -$647,920 | -21.33% | |
| Caption Management, Llc | 0.14% | 635,024 | $2,857,608 | $2,247,985 | -$609,623 | -21.33% | |
| Alyeska Investment Group, L.P. | 0.01% | 617,211 | $2,777,450 | $2,184,927 | -$592,523 | -21.33% | |
| D. E. Shaw & Co., Inc. | 0.00% | 575,624 | $2,590,308 | $2,037,709 | -$552,599 | -21.33% | |
| Jane Street Group, Llc | 0.00% | 554,007 | $2,493,030 | $1,961,185 | -$531,845 | -21.33% | |
| Citadel Advisors Llc | 0.00% | 519,132 | $2,336,094 | $1,837,727 | -$498,367 | -21.33% | |
| Two Sigma Investments, Lp | 0.00% | 475,612 | $2,140,254 | $1,683,666 | -$456,588 | -21.33% | |
| Morgan Stanley | 0.00% | 420,813 | $1,893,660 | $1,489,678 | -$403,982 | -21.33% | |
| Vanguard Portfolio Management Llc | 0.00% | 406,558 | $1,829,511 | $1,439,215 | -$390,296 | -21.33% | |
| Summittx Capital, L.P. | 0.05% | 379,765 | $1,708,943 | $1,344,368 | -$364,575 | -21.33% | |
| Northern Trust Corp | 0.00% | 376,503 | $1,694,264 | $1,332,821 | -$361,443 | -21.33% | |
| Adage Capital Partners Gp, L.L.C. | 0.00% | 300,000 | $1,350,000 | $1,062,000 | -$288,000 | -21.33% | |
| Burkehill Global Management, Lp | 0.07% | 300,000 | $1,350,000 | $1,062,000 | -$288,000 | -21.33% | |
| Jump Financial, Llc | 0.02% | 299,700 | $1,348,650 | $1,060,938 | -$287,712 | -21.33% | |
| Hudson Bay Capital Management Lp | 0.01% | 292,250 | $1,315,125 | $1,034,565 | -$280,560 | -21.33% | |
| Vanguard Fiduciary Trust Co | 0.00% | 289,632 | $1,303,344 | $1,025,297 | -$278,047 | -21.33% | |
| Seven Fleet Capital Management Lp | 0.37% | 256,585 | $1,154,633 | $908,311 | -$246,322 | -21.33% | |
| Cerity Partners Llc | 0.00% | 247,912 | $1,115,604 | $877,608 | -$237,996 | -21.33% | |
| Jacobs Levy Equity Management, Inc | 0.00% | 169,144 | $761,148 | $598,770 | -$162,378 | -21.33% | |
| Diadema Partners Lp | 0.31% | 166,637 | $749,867 | $589,895 | -$159,972 | -21.33% | |
| Charles Schwab Investment Management Inc | 0.00% | 145,342 | $654,039 | $514,511 | -$139,528 | -21.33% | |
| Susquehanna International Group, Llp | 0.00% | 140,060 | $630,270 | $495,812 | -$134,458 | -21.33% | |
| Wellington Management Group Llp | 0.00% | 136,530 | $614,386 | $483,316 | -$131,070 | -21.33% | |
| Seven Grand Managers, Llc | 0.04% | 125,000 | $562,500 | $442,500 | -$120,000 | -21.33% | |
| Ieq Capital, Llc | 0.00% | 114,038 | $513,172 | $403,695 | -$109,477 | -21.33% | |
| Bank Of New York Mellon Corp | 0.00% | 107,331 | $482,989 | $379,952 | -$103,037 | -21.33% | |
| Deutsche Bank Ag\ | 0.00% | 93,132 | $419,095 | $329,687 | -$89,408 | -21.33% | |
| Marex Group Plc | 0.00% | 82,000 | $369,000 | $290,280 | -$78,720 | -21.33% |
Frequently asked questions about LRMR
Who owns the most LRMR stock?
The largest holders of LRMR are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for LARIMAR THERAPEUTICS INC (LRMR).
Is LRMR widely held by superinvestors?
Many widely followed stocks like LRMR appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly LRMR is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.