QTTB Institutional Ownership & Shareholders
Q32 BIO INC (QTTB) is currently held by 69 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $282.33M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Orbimed Advisors Llc is currently the largest disclosed institutional shareholder of QTTB tracked by InsiderSet, reporting ownership valued at approximately $52.59M 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 $36.78M, representing an estimated loss of -30.06% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 85% of the total disclosed QTTB value among the investors covered in this analysis. Major shareholders include Orbimed Advisors Llc, Boxer Capital Management, Llc, Atlas Venture Life Science Advisors, Llc, and several other long-term asset managers with concentrated positions in Q32 BIO INC (QTTB).
This page ranks the largest institutional QTTB 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
69
Total Reported Value
$282.33M
Largest Holder
Orbimed Advisors Llc
Largest Position
$52.59M
Insider Transactions (90d)
6
Latest Filing Quarter
Q2 2026
New Institutional Positions
88
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Orbimed Advisors Llc | 1.00% | 4,127,987 | $52,590,554 | $36,780,364 | -$15,810,190 | -30.06% | |
| Boxer Capital Management, Llc | 3.02% | 3,149,310 | $40,122,209 | $28,060,352 | -$12,061,857 | -30.06% | |
| Atlas Venture Life Science Advisors, Llc | 3.93% | 2,717,106 | $34,615,930 | $24,209,414 | -$10,406,516 | -30.06% | |
| Bvf Inc/Il | 0.77% | 2,350,000 | $29,939,000 | $20,938,500 | -$9,000,500 | -30.06% | |
| Ra Capital Management, L.P. | 0.26% | 2,332,457 | $29,715,502 | $20,782,192 | -$8,933,310 | -30.06% | |
| Point72 Asset Management, L.P. | 0.02% | 1,173,396 | $14,949,065 | $10,454,958 | -$4,494,107 | -30.06% | |
| Opaleye Management Inc. | 1.07% | 931,000 | $11,860,940 | $8,295,210 | -$3,565,730 | -30.06% | |
| Logos Global Management Lp | 0.44% | 800,000 | $10,192,000 | $7,128,000 | -$3,064,000 | -30.06% | |
| Summittx Capital, L.P. | 0.25% | 733,774 | $9,348,281 | $6,537,926 | -$2,810,355 | -30.06% | |
| Vanguard Capital Management Llc | 0.00% | 518,803 | $6,609,550 | $4,622,535 | -$1,987,015 | -30.06% | |
| Ikarian Capital, Llc | 0.90% | 430,000 | $5,478,200 | $3,831,300 | -$1,646,900 | -30.06% | |
| Woodline Partners Lp | 0.01% | 286,212 | $3,646,341 | $2,550,149 | -$1,096,192 | -30.06% | |
| American Century Companies Inc | 0.00% | 272,752 | $3,474,860 | $2,430,220 | -$1,044,640 | -30.06% | |
| Sanofi | 0.58% | 244,083 | $3,109,617 | $2,174,780 | -$934,837 | -30.06% | |
| Acadian Asset Management Llc | 0.00% | 218,234 | $2,779,000 | $1,944,465 | -$834,535 | -30.03% | |
| Acorn Capital Advisors, Llc | 0.75% | 216,171 | $2,754,019 | $1,926,084 | -$827,935 | -30.06% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 179,600 | $2,288,104 | $1,600,236 | -$687,868 | -30.06% |
| Jane Street Group, Llc | 0.00% | 162,747 | $2,073,396 | $1,450,076 | -$623,320 | -30.06% | |
| Monimus Capital Management, Lp | 0.43% | 132,036 | $1,682,139 | $1,176,441 | -$505,698 | -30.06% | |
| Boothbay Fund Management, Llc | 0.03% | 130,427 | $1,661,640 | $1,162,105 | -$499,535 | -30.06% | |
| Geode Capital Management, Llc | 0.00% | 122,690 | $1,563,506 | $1,093,168 | -$470,338 | -30.08% | |
| Citadel Advisors Llc | 0.00% | 120,663 | $1,537,247 | $1,075,107 | -$462,140 | -30.06% | |
| Blackrock, Inc. | 0.00% | 118,507 | $1,509,780 | $1,055,897 | -$453,883 | -30.06% | |
| Marshall Wace, Llp | 0.00% | 67,045 | $854,153 | $597,371 | -$256,782 | -30.06% | |
| Vanguard Fiduciary Trust Co | 0.00% | 66,217 | $843,605 | $589,993 | -$253,612 | -30.06% | |
| Carlyle Group Inc. | 0.01% | 60,363 | $769,020 | $537,834 | -$231,186 | -30.06% | |
| State Street Corp | 0.00% | 52,214 | $665,206 | $465,227 | -$199,979 | -30.06% | |
| Two Sigma Investments, Lp | 0.00% | 49,582 | $631,675 | $441,776 | -$189,899 | -30.06% | |
| Quadrature Capital Ltd | 0.00% | 36,396 | $463,685 | $324,288 | -$139,397 | -30.06% | |
| Bridgeway Capital Management, Llc | 0.01% | 34,613 | $440,970 | $308,402 | -$132,568 | -30.06% | |
| Dafna Capital Management Llc | 0.08% | 32,896 | $419,095 | $293,103 | -$125,992 | -30.06% | |
| Knott David M Jr | 0.20% | 30,412 | $387,449 | $270,971 | -$116,478 | -30.06% | |
| Affinity Asset Advisors, Llc | 0.02% | 27,777 | $353,879 | $247,493 | -$106,386 | -30.06% | |
| Squarepoint Ops Llc | 0.00% | 23,790 | $303,085 | $211,969 | -$91,116 | -30.06% | |
| Northern Trust Corp | 0.00% | 23,631 | $301,059 | $210,552 | -$90,507 | -30.06% | |
| Dimensional Fund Advisors Lp | 0.00% | 23,588 | $300,511 | $210,169 | -$90,342 | -30.06% | |
| Susquehanna International Group, Llp | 0.00% | 23,342 | $297,377 | $207,977 | -$89,400 | -30.06% | |
| Mangrove Partners Im, Llc | 0.02% | 22,150 | $282,191 | $197,357 | -$84,835 | -30.06% | |
| Lpl Financial Llc | 0.00% | 18,170 | $231,486 | $161,895 | -$69,591 | -30.06% | |
| Hrt Financial Lp | 0.00% | 15,949 | $203,000 | $142,106 | -$60,894 | -30.00% | |
| Ubs Group Ag | 0.00% | 15,008 | $191,202 | $133,721 | -$57,481 | -30.06% | |
| Balyasny Asset Management L.P. | 0.00% | 12,342 | $157,237 | $109,967 | -$47,270 | -30.06% | |
| Exoduspoint Capital Management, Lp | 0.00% | 11,336 | $144,421 | $101,004 | -$43,417 | -30.06% | |
| Millennium Management Llc | 0.00% | 10,928 | $139,223 | $97,368 | -$41,855 | -30.06% | |
| Xtx Topco Ltd | 0.00% | 10,874 | $138,535 | $96,887 | -$41,648 | -30.06% | |
| Morgan Stanley | 0.00% | 6,456 | $82,259 | $57,523 | -$24,736 | -30.07% | |
| Vanguard Global Advisers, Llc | 0.00% | 4,824 | $61,458 | $42,982 | -$18,476 | -30.06% | |
| Fmr Llc | 0.00% | 3,388 | $43,163 | $30,187 | -$12,976 | -30.06% | |
| Citigroup Inc | 0.00% | 2,888 | $36,793 | $25,732 | -$11,061 | -30.06% | |
| Private Wealth Asset Management, Llc | 0.00% | 1,700 | $21,658 | $15,147 | -$6,511 | -30.06% |
Frequently asked questions about QTTB
Who are the largest institutional holders of QTTB?
The largest institutional holders of QTTB reported in the latest SEC Form 13F filings include Orbimed Advisors Llc, Boxer Capital Management, Llc, Atlas Venture Life Science Advisors, Llc, Bvf Inc/Il, and Ra Capital Management, L.P.. InsiderSet ranks institutional holders by their latest reported QTTB position.
What is QTTB institutional ownership?
This page tracks QTTB positions reported by institutional investment managers through SEC Form 13F. Q32 BIO INC (QTTB) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own QTTB?
InsiderSet currently tracks 69 institutional managers reporting QTTB 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 QTTB shareholders.
How much QTTB stock do institutions own?
Institutional investment managers disclosed approximately $282.33M in QTTB holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was QTTB institutional ownership last updated?
The latest QTTB 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 QTTB 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 QTTB position after the reporting date.
Are institutions buying or selling QTTB?
Institutional buying and selling can be analyzed by comparing QTTB positions across consecutive 13F reporting periods. InsiderSet's QTTB Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View QTTB ownership changes.
How has QTTB institutional ownership changed over time?
InsiderSet tracks QTTB institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.