Q32 BIO INC (QTTB) Top Institutional Shareholders
Q32 BIO INC (QTTB) 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 $59.31M in QTTB holdings during the latest filing period.
Orbimed Advisors Llc is currently the largest disclosed institutional shareholder of QTTB tracked by InsiderSet, reporting ownership valued at approximately $14.46M 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 $29.09M, representing an estimated gain of +101.09% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 90% of the total disclosed QTTB value among the investors covered in this analysis. Major shareholders include Orbimed Advisors Llc, Atlas Venture Life Science Advisors, Llc, Opaleye Management Inc., 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
53
Total Reported Value
$59.31M
Largest Holder
Orbimed Advisors Llc
Largest Position
$14.46M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
62
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Orbimed Advisors Llc | 0.32% | 2,252,987 | $14,464,177 | $29,086,062 | +$14,621,885 | +101.09% | |
| Atlas Venture Life Science Advisors, Llc | 1.70% | 2,092,106 | $13,431,321 | $27,009,088 | +$13,577,767 | +101.09% | |
| Opaleye Management Inc. | 1.06% | 1,256,228 | $8,064,984 | $16,217,903 | +$8,152,919 | +101.09% | |
| Carlyle Group Inc. | 0.07% | 1,102,741 | $7,079,597 | $14,236,386 | +$7,156,789 | +101.09% | |
| Arch Venture Management, Llc | 0.30% | 320,482 | $2,057,494 | $4,137,423 | +$2,079,929 | +101.09% | |
| Acorn Capital Advisors, Llc | 0.57% | 315,052 | $2,022,634 | $4,067,321 | +$2,044,687 | +101.09% | |
| Vanguard Capital Management Llc | 0.00% | 306,401 | $1,967,094 | $3,955,637 | +$1,988,543 | +101.09% | |
| Mackenzie Financial Corp | 0.00% | 246,304 | $1,581,272 | $3,179,785 | +$1,598,513 | +101.09% | |
| Sanofi | 0.47% | 244,083 | $1,567,013 | $3,151,112 | +$1,584,099 | +101.09% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 206,915 | $1,328,394 | $2,671,273 | +$1,342,879 | +101.09% |
| Monimus Capital Management, Lp | 0.24% | 134,310 | $862,270 | $1,733,942 | +$871,672 | +101.09% | |
| Geode Capital Management, Llc | 0.00% | 118,152 | $758,740 | $1,525,342 | +$766,602 | +101.04% | |
| Pfizer Inc | 0.31% | 101,618 | $736,731 | $1,311,888 | +$575,157 | +78.07% | |
| Blackrock, Inc. | 0.00% | 86,147 | $553,063 | $1,112,158 | +$559,095 | +101.09% | |
| Jane Street Group, Llc | 0.00% | 65,599 | $421,145 | $846,883 | +$425,738 | +101.09% | |
| Marshall Wace, Llp | 0.00% | 52,440 | $336,664 | $677,000 | +$340,336 | +101.09% | |
| Vanguard Fiduciary Trust Co | 0.00% | 49,995 | $320,968 | $645,435 | +$324,467 | +101.09% | |
| Two Sigma Investments, Lp | 0.00% | 42,346 | $271,861 | $546,687 | +$274,826 | +101.09% | |
| State Street Corp | 0.00% | 41,514 | $266,520 | $535,946 | +$269,426 | +101.09% | |
| Adar1 Capital Management, Llc | 0.01% | 35,000 | $224,700 | $451,850 | +$227,150 | +101.09% | |
| Affinity Asset Advisors, Llc | 0.01% | 27,777 | $178,328 | $358,601 | +$180,273 | +101.09% | |
| Northern Trust Corp | 0.00% | 25,033 | $160,712 | $323,176 | +$162,464 | +101.09% | |
| Cetera Investment Advisers | 0.00% | 20,695 | $132,862 | $267,172 | +$134,310 | +101.09% | |
| American Century Companies Inc | 0.00% | 18,770 | $120,503 | $242,321 | +$121,818 | +101.09% | |
| Citadel Advisors Llc | 0.00% | 15,481 | $99,388 | $199,860 | +$100,472 | +101.09% | |
| Bridgeway Capital Management, Llc | 0.00% | 12,613 | $80,975 | $162,834 | +$81,859 | +101.09% | |
| Morgan Stanley | 0.00% | 9,560 | $61,375 | $123,420 | +$62,045 | +101.09% | |
| Eversource Wealth Advisors, Llc | 0.00% | 1,110 | $48,484 | $14,330 | -$34,154 | -70.44% | |
| Fmr Llc | 0.00% | 3,400 | $21,828 | $43,894 | +$22,066 | +101.09% | |
| Royal Bank Of Canada | 0.00% | 2,744 | $18,000 | $35,425 | +$17,425 | +96.81% | |
| Federated Hermes, Inc. | 0.00% | 2,273 | $14,593 | $29,344 | +$14,751 | +101.09% | |
| Vanguard Global Advisers, Llc | 0.00% | 1,915 | $12,294 | $24,723 | +$12,429 | +101.10% | |
| Tower Research Capital Llc (Trc) | 0.00% | 1,871 | $12,012 | $24,155 | +$12,143 | +101.09% | |
| Arax Advisory Partners | 0.00% | 1,148 | $7,370 | $14,821 | +$7,451 | +101.09% | |
| Rockefeller Capital Management L.P. | 0.00% | 577 | $3,704 | $7,449 | +$3,745 | +101.11% | |
| Jones Financial Companies Lllp | 0.00% | 500 | $3,625 | $6,455 | +$2,830 | +78.07% | |
| Russell Investments Group, Ltd. | 0.00% | 454 | $2,915 | $5,861 | +$2,946 | +101.07% | |
| Bnp Paribas Financial Markets | 0.00% | 303 | $1,945 | $3,912 | +$1,967 | +101.12% | |
| Ubs Group Ag | 0.00% | 270 | $1,733 | $3,486 | +$1,753 | +101.14% | |
| Acadian Asset Management Llc | 0.00% | 172,586 | $1,106 | $2,228,085 | +$2,226,979 | +201354.36% | |
| Nisa Investment Advisors, Llc | 0.00% | 166 | $1,066 | $2,143 | +$1,077 | +101.04% | |
| Osaic Holdings, Inc. | 0.00% | 124 | $796 | $1,601 | +$805 | +101.11% | |
| Northwestern Mutual Wealth Management Co | 0.00% | 111 | $713 | $1,433 | +$720 | +100.98% | |
| Sbi Securities Co., Ltd. | 0.00% | 104 | $668 | $1,343 | +$675 | +100.99% | |
| Allworth Financial Lp | 0.00% | 98 | $630 | $1,265 | +$635 | +100.82% | |
| Wells Fargo & Company/Mn | 0.00% | 84 | $539 | $1,084 | +$545 | +101.19% | |
| Federation Des Caisses Desjardins Du Quebec | 0.00% | 70 | $446 | $904 | +$458 | +102.62% | |
| Cwm, Llc | 0.00% | 39 | $250 | $503 | +$253 | +101.40% | |
| Cambridge Investment Research Advisors, Inc. | 0.00% | 35,025 | $225 | $452,173 | +$451,948 | +200865.67% | |
| Group One Trading Llc | 0.00% | 34 | $218 | $439 | +$221 | +101.35% |
Frequently asked questions about QTTB
Who owns the most QTTB stock?
The largest holders of QTTB 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 Q32 BIO INC (QTTB).
Is QTTB widely held by superinvestors?
Many widely followed stocks like QTTB appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly QTTB 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.