LRMR Institutional Ownership & Shareholders
LARIMAR THERAPEUTICS INC (LRMR) is currently held by 164 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $297.20M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Deerfield Management Company, L.P. is currently the largest disclosed institutional shareholder of LRMR tracked by InsiderSet, reporting ownership valued at approximately $108.60M in its June 30, 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 $90.44M, representing an estimated loss of -16.72% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 71% 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
164
Total Reported Value
$297.20M
Largest Holder
Deerfield Management Company, L.P.
Largest Position
$108.60M
Insider Transactions (90d)
1
Latest Filing Quarter
Q2 2026
New Institutional Positions
68
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. | 1.13% | 35,606,974 | $108,601,271 | $90,441,714 | -$18,159,557 | -16.72% | |
| Blue Owl Capital Holdings Lp | 4.25% | 9,163,157 | $27,947,629 | $23,274,419 | -$4,673,210 | -16.72% | |
| Blackrock, Inc. | 0.00% | 5,678,035 | $17,318,006 | $14,422,209 | -$2,895,797 | -16.72% | |
| Defilade Capital Management, L.P. | 1.50% | 3,670,135 | $11,193,912 | $9,322,143 | -$1,871,769 | -16.72% | |
| Driehaus Capital Management Llc | 0.06% | 3,163,423 | $9,648,440 | $8,035,094 | -$1,613,346 | -16.72% | |
| Vanguard Capital Management Llc | 0.00% | 2,974,901 | $9,073,448 | $7,556,249 | -$1,517,199 | -16.72% | |
| Rtw Investments, Lp | 0.07% | 2,565,999 | $7,826,297 | $6,517,637 | -$1,308,660 | -16.72% | |
| Aqr Capital Management Llc | 0.00% | 2,371,414 | $7,232,813 | $6,023,392 | -$1,209,421 | -16.72% | |
| Marshall Wace, Llp | 0.01% | 2,012,458 | $6,137,996 | $5,111,643 | -$1,026,353 | -16.72% | |
| Dafna Capital Management Llc | 1.17% | 2,008,164 | $6,124,900 | $5,100,737 | -$1,024,163 | -16.72% | |
| Aigh Capital Management Llc | 0.67% | 1,850,000 | $5,910,750 | $4,699,000 | -$1,211,750 | -20.50% | |
| Goldman Sachs Group Inc | 0.00% | 1,752,910 | $5,346,375 | $4,452,391 | -$893,984 | -16.72% | |
| Geode Capital Management, Llc | 0.00% | 1,679,003 | $5,121,921 | $4,264,668 | -$857,253 | -16.74% | |
| Qube Research & Technologies Ltd | 0.01% | 1,641,042 | $5,005,178 | $4,168,247 | -$836,931 | -16.72% | |
| Citadel Advisors Llc | 0.00% | 1,456,825 | $4,443,316 | $3,700,336 | -$742,981 | -16.72% | |
| State Street Corp | 0.00% | 1,411,804 | $4,306,002 | $3,585,982 | -$720,020 | -16.72% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,403,172 | $4,279,675 | $3,564,057 | -$715,618 | -16.72% | |
| Woodline Partners Lp | 0.01% | 1,400,850 | $4,272,593 | $3,558,159 | -$714,434 | -16.72% | |
| Millennium Management Llc | 0.00% | 1,333,037 | $4,065,763 | $3,385,914 | -$679,849 | -16.72% | |
| Dimensional Fund Advisors Lp | 0.00% | 1,129,697 | $3,608,864 | $2,869,430 | -$739,434 | -20.49% | |
| Fmr Llc | 0.00% | 937,368 | $2,858,971 | $2,380,915 | -$478,056 | -16.72% | |
| Sphera Funds Management Ltd. | 0.40% | 926,004 | $2,824,312 | $2,352,050 | -$472,262 | -16.72% | |
| Nuveen, Llc | 0.00% | 895,304 | $2,730,677 | $2,274,072 | -$456,605 | -16.72% | |
| Alyeska Investment Group, L.P. | 0.00% | 617,211 | $1,882,494 | $1,567,716 | -$314,778 | -16.72% | |
| Hennion & Walsh Asset Management, Inc. | 0.05% | 570,361 | $1,822,303 | $1,448,717 | -$373,586 | -20.50% | |
| Northern Trust Corp | 0.00% | 550,266 | $1,678,311 | $1,397,676 | -$280,635 | -16.72% | |
| Vanguard Fiduciary Trust Co | 0.00% | 448,168 | $1,366,912 | $1,138,347 | -$228,565 | -16.72% | |
| Fi3 Financial Advisors, Llc | 0.30% | 2,915 | $1,263,896 | $7,404 | -$1,256,492 | -99.41% | |
| Los Angeles Capital Management Llc | 0.00% | 399,542 | $1,218,604 | $1,014,837 | -$203,767 | -16.72% | |
| Summittx Capital, L.P. | 0.03% | 352,284 | $1,074,466 | $894,801 | -$179,665 | -16.72% | |
| Jpmorgan Chase & Co | 0.00% | 328,015 | $1,049,648 | $833,158 | -$216,490 | -20.63% | |
| Gem Investment Advisors, Llc | 0.60% | 319,519 | $974,533 | $811,578 | -$162,955 | -16.72% | |
| Burkehill Global Management, Lp | 0.03% | 300,000 | $915,000 | $762,000 | -$153,000 | -16.72% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 297,443 | $907,201 | $755,505 | -$151,696 | -16.72% |
| Adar1 Capital Management, Llc | 0.04% | 272,745 | $831,872 | $692,772 | -$139,100 | -16.72% | |
| Cerity Partners Llc | 0.00% | 271,582 | $828,326 | $689,818 | -$138,508 | -16.72% | |
| Two Sigma Investments, Lp | 0.00% | 236,133 | $720,206 | $599,778 | -$120,428 | -16.72% | |
| Seven Fleet Capital Management Lp | 0.12% | 230,921 | $704,309 | $586,539 | -$117,770 | -16.72% | |
| Charles Schwab Investment Management Inc | 0.00% | 206,969 | $631,255 | $525,701 | -$105,554 | -16.72% | |
| Ieq Capital, Llc | 0.00% | 203,363 | $620,258 | $516,542 | -$103,716 | -16.72% | |
| Caption Management, Llc | 0.02% | 193,018 | $588,705 | $490,266 | -$98,439 | -16.72% | |
| Soleus Capital Management, L.P. | 0.02% | 188,102 | $573,711 | $477,779 | -$95,932 | -16.72% | |
| Creative Planning | 0.00% | 176,685 | $564,510 | $448,780 | -$115,730 | -20.50% | |
| Jacobs Levy Equity Management, Inc | 0.00% | 170,575 | $520,254 | $433,261 | -$86,994 | -16.72% | |
| Susquehanna Portfolio Strategies, Llc | 0.01% | 165,156 | $503,726 | $419,496 | -$84,230 | -16.72% | |
| Alliancebernstein L.P. | 0.00% | 108,220 | $486,990 | $274,879 | -$212,111 | -43.56% | |
| Diadema Partners Lp | 0.16% | 146,637 | $447,243 | $372,458 | -$74,785 | -16.72% | |
| Susquehanna International Group, Llp | 0.00% | 144,428 | $440,505 | $366,847 | -$73,658 | -16.72% | |
| Ubs Group Ag | 0.00% | 144,326 | $440,194 | $366,588 | -$73,606 | -16.72% | |
| Bank Of New York Mellon Corp | 0.00% | 138,831 | $423,435 | $352,631 | -$70,804 | -16.72% |
Frequently asked questions about LRMR
Who are the largest institutional holders of LRMR?
The largest institutional holders of LRMR reported in the latest SEC Form 13F filings include Deerfield Management Company, L.P., Blue Owl Capital Holdings Lp, Blackrock, Inc., Defilade Capital Management, L.P., and Driehaus Capital Management Llc. InsiderSet ranks institutional holders by their latest reported LRMR position.
What is LRMR institutional ownership?
This page tracks LRMR positions reported by institutional investment managers through SEC Form 13F. LARIMAR THERAPEUTICS INC (LRMR) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own LRMR?
InsiderSet currently tracks 164 institutional managers reporting LRMR holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of LRMR shareholders.
How much LRMR stock do institutions own?
Institutional investment managers disclosed approximately $297.20M in LRMR holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was LRMR institutional ownership last updated?
The latest LRMR institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional LRMR holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its LRMR position after the reporting date.
Are institutions buying or selling LRMR?
Institutional buying and selling can be analyzed by comparing LRMR positions across consecutive 13F reporting periods. InsiderSet's LRMR Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View LRMR ownership changes.
How has LRMR institutional ownership changed over time?
InsiderSet tracks LRMR institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.