Company · Ownership research

Q32 Bio Inc. QTTB

CIK 0001661998 · CUSIP 746964105

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 746964105 (QTTB), not CUSIP 746964955 (QTTB), CUSIP 746964905 (QTTB), and does not merge CUSIPs.

This page lists the top 20 of 93 rows by value; the complete set is available through the API.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	ORBIMED ADVISORS LLC CIK 1055951 · View history	$7.75M 2,252,987 shares	0.16%	0(0.00%)Unchanged	SEC filing ↗ Feb 14, 2025	▾
02	Atlas Venture Life Science Advisors, LLC CIK 1917529 · View history	$7.20M 2,092,106 shares	0.88%	0(0.00%)Unchanged	SEC filing ↗ Feb 6, 2025	▾
03	Carlyle Group Inc. CIK 1527166 · View history	$3.78M 1,102,741 shares	0.09%	0(0.00%)Unchanged	SEC filing ↗ Feb 13, 2025	▾
04	ACORN CAPITAL ADVISORS, LLC CIK 2054410 · Amended · View history	$2.76M 803,425 shares	1.49%	—	SEC filing ↗ May 19, 2025	▾
05	Sio Capital Management, LLC CIK 1482416 · View history	$2.40M 697,413 shares	0.68%	+697.41KNew	SEC filing ↗ Feb 14, 2025	▾
06	Monaco Asset Management SAM CIK 1803593 · View history	$1.98M 574,816 shares	0.88%	+574.82KNew	SEC filing ↗ Feb 10, 2025	▾
07	BlackRock, Inc. CIK 2012383 · View history	$1.61M 467,442 shares	0.00%	+58.78K(+14.40%)Added	SEC filing ↗ Feb 7, 2025	▾
08	ARCH Venture Management, LLC CIK 1274403 · View history	$1.10M 320,482 shares	0.48%	0(0.00%)Unchanged	SEC filing ↗ Feb 14, 2025	▾
09	VANGUARD GROUP INC CIK 102909 · View history	$1.09M 316,572 shares	0.00%	+31.16K(+10.90%)Added	SEC filing ↗ Feb 11, 2025	▾
10	Temasek Holdings (Private) Ltd CIK 1021944 · View history	$1.08M 313,943 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ Feb 14, 2025	▾
11	Pfizer Inc CIK 78003 · View history	$955.55K 277,777 shares	0.04%	—	SEC filing ↗ Feb 14, 2025	▾
12	Sanofi CIK 1121404 · View history	$839.65K 244,083 shares	0.48%	—	SEC filing ↗ Feb 14, 2025	▾
13	Trustees of Columbia University in the City of New York CIK 1420995 · View history	$460.63K 133,903 shares	0.07%	+133.90KNew	SEC filing ↗ Feb 14, 2025	▾
14	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$458.55K 133,263 shares	0.00%	+1.50K(+1.10%)Added	SEC filing ↗ Feb 12, 2025	▾
15	Mariner, LLC CIK 1373442 · View history	$417.71K 121,427 shares	0.00%	+121.43KNew	SEC filing ↗ Feb 13, 2025	▾
16	STATE STREET CORP CIK 93751 · View history	$397.43K 115,533 shares	0.00%	+5.37K(+4.90%)Added	SEC filing ↗ Feb 14, 2025	▾
17	RHUMBLINE ADVISERS CIK 1115418 · Amended · View history	$363.06K 105,544 shares	0.00%	+97.20K(+1,164.30%)Added	SEC filing ↗ Jan 30, 2025	▾
18	ArrowMark Colorado Holdings LLC CIK 1483859 · View history	$280.30K 81,482 shares	0.00%	+81.48KNew	SEC filing ↗ Feb 14, 2025	▾
19	MORGAN STANLEY CIK 895421 · Amended · View history	$250.65K 72,862 shares	0.00%	+56.35K(+341.20%)Added	SEC filing ↗ May 15, 2025	▾
20	NORTHERN TRUST CORP CIK 73124 · View history	$207.04K 60,187 shares	0.00%	-1.07K(-1.70%)Reduced	SEC filing ↗ Feb 14, 2025	▾

Showing 20 / 93 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

10,995,395

Not deduplicated across managers

Disclosed value

$37.81M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Q32 Bio Inc. · Q4 2024

Explore all 93 reporting institutions.

This page includes 20 of 93 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.