QTTB · Q32 Bio Inc. · Holdings

$8.41 -0.24 (-2.77%)

Market Cap

$257.51M

29.77M

Volume · Oct 26 447.48K Avg daily vol (3M) 711.36K

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP → See every holder of QTTB: 13F, 13D and 13G, insiders and funds →

The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.

Quarter:

Holders: 72

Total Value: $285,890,020

Total Shares: 22,441,077

Institutional Ownership Trend

27 quarters

Holder Concentration

Across 72 13F filers

Top Holder

18.4%

of institutional value

Top 5

65.4%

of institutional value

Top 10

84.4%

of institutional value

HHI

991

Broadly held

Who Holds QTTB

Last 8 quarters through Sep 30, 2026 (filing window open)

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026, the newest closed quarter: 72 filers, like-for-like change +135.2%; actively managed books +141.9%; index-like books +42.7%.

Holder type	Share	Filers	Change	New	Exited
Registered adviser	69.8%	36	+167.6%	17	3
Exempt adviser	0.3%	1	-82.0%	0	1
Adviser	0.0%	1	-53.8%	0	0
Bank	0.4%	6	+34.7%	1	1
Broker-dealer	0.1%	2	+53441.2%	1	0
Non-US	0.0%	2	-2.5%	0	0
Holding company	0.6%	4	+29.5%	0	0
Insurer	0.0%	0	—	0	0
Benefit plan	0.0%	0	—	0	0
Unknown	28.8%	20	+106.1%	8	3

Style	Share	Filers	Change	New	Exited
Index-like	4.1%	8	+42.7%	0	0
Systematic-like	8.1%	9	+3001.3%	6	0
Concentrated	54.3%	13	+121.5%	5	3
Diversified active	33.6%	42	+125.4%	16	5
Not measured	0.0%	0	—	0	0
Unknown	0.0%	0	—	0	0

Turnover	Share	Filers	Change	New	Exited
Low turnover	51.8%	33	+153.9%	9	5
Medium turnover	27.1%	15	+37.4%	3	2
High turnover	18.5%	20	+2205.0%	15	1
Unknown	2.7%	4	+64.5%	0	0
Not measured	0.0%	0	—	0	0

Holding horizon	Share	Filers	Change	New	Exited
Short horizon	6.9%	11	+211.6%	6	0
Medium horizon	22.9%	12	+127.4%	5	3
Long horizon	39.5%	39	+183.0%	11	5
Unknown	30.6%	10	+88.5%	5	0
Not measured	0.0%	0	—	0	0

13F book size	Share	Filers	Change	New	Exited
Under $1B	17.2%	11	+31.8%	6	1
$1B to $10B	55.5%	16	+214.9%	7	3
$10B to $100B	19.7%	21	+147.2%	9	1
$100B or more	7.6%	24	+95.5%	5	3
Not measured	0.0%	0	—	0	0

Client base	Share	Filers	Change	New	Exited
Individuals and high net worth	0.0%	8	-84.4%	2	1
Pooled investment vehicles	66.7%	23	+177.8%	14	2
Registered funds and BDCs	3.2%	4	+60.1%	1	0
Pension and profit sharing plans	0.0%	1	0.0%	0	0
Insurance companies	0.0%	0	—	0	0
Governments and sovereign funds	0.0%	0	—	0	0
Diversified	0.0%	0	—	0	0
Other investment advisers	0.0%	0	—	0	0
Unknown	30.2%	36	+83.7%	10	5

Private funds	Share	Filers	Change	New	Exited
Hedge funds	33.9%	20	+324.9%	12	1
Private equity funds	0.3%	2	-94.5%	1	0
Venture capital funds	14.1%	2	+877.4%	2	1
Real estate funds	0.0%	2	-76.7%	0	0
Other private funds	18.9%	4	+66.6%	1	1
Mixed private funds	0.0%	0	—	0	0
No private funds	2.9%	7	+44.9%	1	1
Private funds, type not stated	0.0%	0	—	0	0
Securitized asset funds	0.0%	0	—	0	0
Unknown	29.9%	35	+102.6%	10	4

Location	Share	Filers	Change	New	Exited
United States	98.3%	62	+145.5%	24	7
Outside the US	1.7%	10	-31.6%	3	1

The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Excluded 1 holder with no observed 2026-06-30 13F.

Conviction and Crowding

71 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders

4.23% of filers hold it in their top 10

Mar 31, 2026: 4

Holders above 5%

median weight 0.000%

Mar 31, 2026: 0

Crowding

—

holders exceed shares outstanding: 13F filers report more shares than the cover-page count, which predates an issuance, is misstated, or misses shares lent and reported twice

Mar 31, 2026: 39.5%

Private-fund advisers

—

of shares outstanding

Institutional ownership

—

holders exceed shares outstanding: 13F filers report more shares than the cover-page count, which predates an issuance, is misstated, or misses shares lent and reported twice

Top 10 holders

84.9%

of 13F shares, Herfindahl 0.101

Active holders

+141.9%

like-for-like share change of active filers

5% stakes on record

2 13D, 4 13G (1 institutional, 3 passive, 0 exempt)

How long holders have held it value-weighted 4.3 quarters

Under 1 year 62.5% 1 to 3 years 37.5% 3 years or more 0.000% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $31,536,186 (2 buying, 0 selling).

Estimated Holder Cost Basis

Quarter ended Jun 30, 2026, on that quarter's share basis

Estimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.

Estimated avg cost

$7.91

estimated per share

Mar 31, 2026: $4.61

Quarter-end price

$12.74

implied by 13F values

Estimated gain or loss

+61.1%

price against the estimated cost

Estimated at a loss

0.173%

of costed 13F value

Estimated cost covers 62.6% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.

Shared Holders

Companies QTTB's active holders also own, quarter ended Jun 30, 2026

#	Company	Shared holders	Similarity
1	PTN Palatin Technologies Inc	3	0.375
2	HELP Helus Pharma Inc.	7	0.373
3	ACET Adicet Bio, Inc.	4	0.354
4	SPRB Spruce Biosciences, Inc.	5	0.334
5	RZLT Rezolute, Inc.	5	0.323
6	OKUR OnKure Therapeutics, Inc.	6	0.320
7	JBIO Jade Biosciences, Inc.	6	0.313
8	LXEO Lexeo Therapeutics, Inc.	5	0.313
9	ODTX Odyssey Therapeutics, Inc.	5	0.280
10	FTH Faeth Therapeutics, Inc.	5	0.273

Shareholder Targets

13F filers that own its peers but not QTTB, quarter ended Jun 30, 2026

Found through its holder-overlap peers: PTN, HELP, ACET, SPRB, RZLT, OKUR, JBIO, LXEO, ODTX, FTH, FBRX, AMAN, NMRA, PEPG, KPTI, IRON, RLMD, ANNX, IVVD, EDIT. 539 filers in all.

#	Filer	In peers	Of book	Largest peers
1	Jupiter Topco LLC Unknown, Diversified active	$298,459,280 9 held	0.120%	JBIO, RLMD, IVVD
2	JPMORGAN CHASE & CO Bank, Diversified active	$187,364,635 19 held	0.010%	IRON, JBIO, EDIT
3	ADAGE CAPITAL PARTNERS GP, L.L.C. Registered adviser, Diversified active	$169,991,344 10 held	0.240%	JBIO, RLMD, HELP
4	TCG Crossover Management, LLC Unknown, Diversified active	$153,693,785 3 held	3.69%	IRON, EDIT, FBRX
5	PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser, Diversified active	$149,846,921 13 held	0.020%	IRON, ODTX, ANNX
6	Venrock Adviser, LLC Registered adviser, Concentrated	$144,378,510 3 held	4.38%	JBIO, RLMD, HELP
7	Vestal Point Capital, LP Registered adviser, Diversified active	$143,793,381 4 held	3.36%	IRON, LXEO, OKUR
8	WELLINGTON MANAGEMENT GROUP LLP Holding company, Diversified active	$135,810,884 9 held	0.020%	IRON, ANNX, JBIO
9	Bellevue Group AG Non-US, Diversified active	$132,318,162 3 held	2.86%	JBIO, IRON, ANNX
10	Siren, L.L.C. Unknown, Diversified active	$130,291,906 6 held	2.65%	IRON, ANNX, RZLT

Fund Ownership of QTTB by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 2.08% of shares outstanding.

Fund type	Of shares outstanding	Change	Shares	Funds
Index funds	0.27%	-0.04 pp	81,237	8
Index ETFs	1.81%	+0.78 pp	537,849	3
Active ETFs	0.05%	+0.05 pp	15,142	2
Active funds	0.15%	+0.11 pp	45,585	9
Unclassified	0.44%	+0.44 pp	130,800	3
All registered funds	2.72%	+1.34 pp	810,613	25

How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Holder type: Registered adviser 36 Exempt adviser 1 Adviser 1 Bank 6 Broker-dealer 2 Non-US 2 Holding company 4 Unknown 20

Showing 74 of 74

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

ORBIMED ADVISORS LLC

$52,590,554

18.40%

4,127,987

Boxer Capital Management, LLC

$40,122,209

14.03%

3,149,310

Atlas Venture Life Science Advisors, LLC

$34,615,930

12.11%

2,717,106

BVF INC/IL

$29,939,000

10.47%

2,350,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BVF PARTNERS L P/IL	2,350,000	$29,939,000	100.0%	Defined

RA CAPITAL MANAGEMENT, L.P.

$29,715,502

10.39%

2,332,457

Point72 Asset Management, L.P.

$14,949,065

5.23%

1,173,396

Opaleye Management Inc.

$11,860,940

4.15%

931,000

Logos Global Management LP

$10,192,000

3.57%

800,000

SummitTX Capital, L.P.

$9,348,280

3.27%

733,774

VANGUARD CAPITAL MANAGEMENT LLC

$6,609,550

2.31%

518,803

Ikarian Capital, LLC

$5,478,200

1.92%

430,000

Woodline Partners LP

$3,646,340

1.28%

286,212

AMERICAN CENTURY COMPANIES INC

$3,474,860

1.22%

272,752

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
AMERICAN CENTURY INVESTMENT MANAGEMENT INC	272,752	$3,474,860	100.0%	Defined

Sanofi

$3,109,617

1.09%

244,083

ACADIAN ASSET MANAGEMENT LLC

$2,780,301

0.97%

218,234

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Acadian Inc	218,234	$2,780,301	100.0%	Defined

ACORN CAPITAL ADVISORS, LLC

$2,754,018

0.96%

216,171

Ikarian Capital, LLC

$2,548,000

0.89%

200,000

RENAISSANCE TECHNOLOGIES LLC

$2,288,104

0.80%

179,600

JANE STREET GROUP, LLC

$2,073,396

0.73%

162,747

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	132,352	$1,686,164	81.3%	Defined
Jane Street Global Trading, LLC	30,395	$387,232	18.7%	Defined

MONIMUS CAPITAL MANAGEMENT, LP

$1,682,138

0.59%

132,036

BOOTHBAY FUND MANAGEMENT, LLC

$1,661,639

0.58%

130,427

GEODE CAPITAL MANAGEMENT, LLC

$1,563,070

0.55%

122,690

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	22,767	$290,051	18.6%	Defined
Held directly	99,923	$1,273,019	81.4%	Defined

CITADEL ADVISORS LLC

$1,537,246

0.54%

120,663

BlackRock, Inc.

$1,509,777

0.53%

118,507

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BlackRock Investment Management, LLC	1,966	$25,046	1.7%	Sole
BlackRock Fund Advisors	29,465	$375,384	24.9%	Sole
BlackRock Institutional Trust Company, N.A.	85,882	$1,094,136	72.5%	Sole
Aperio Group, LLC	1,194	$15,211	1.0%	Sole

MARSHALL WACE, LLP

$854,153

0.30%

67,045

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Marshall Wace North America L.P. joint	67,045	$854,153	100.0%	Other

VANGUARD FIDUCIARY TRUST CO

$843,604

0.30%

66,217

BOOTHBAY FUND MANAGEMENT, LLC

$780,962

0.27%

61,300

Carlyle Group Inc.

$769,024

0.27%

60,363

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Abingworth LLP	60,363	$769,024	100.0%	Defined

STATE STREET CORP

$665,206

0.23%

52,214

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS TRUST COMPANY	52,214	$665,206	100.0%	Defined

TWO SIGMA INVESTMENTS, LP

$631,674

0.22%

49,582

Quadrature Capital Ltd

$463,685

0.16%

36,396

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Quadrature US Inc.	36,396	$463,685	100.0%	Other

BRIDGEWAY CAPITAL MANAGEMENT, LLC

$440,969

0.15%

34,613

DAFNA Capital Management LLC

$419,095

0.15%

32,896

Knott David M Jr

$387,448

0.14%

30,412

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dorset Partners LLC	30,412	$387,448	100.0%	Defined

Affinity Asset Advisors, LLC

$353,878

0.12%

27,777

Squarepoint Ops LLC

$303,084

0.11%

23,790

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Squarepoint Capital LLP	23,790	$303,084	100.0%	Defined

NORTHERN TRUST CORP

$301,058

0.11%

23,631

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	23,631	$301,058	100.0%	Defined

DIMENSIONAL FUND ADVISORS LP

$300,510

0.11%

23,588

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Ireland Ltd	3,505	$44,653	14.9%	Defined
Held directly	20,083	$255,857	85.1%	Sole

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$297,377

0.10%

23,342

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	23,342	$297,377	100.0%	Other

MANGROVE PARTNERS IM, LLC

$282,191

0.10%

22,150

LPL Financial LLC

$231,485

0.08%

18,170

Cambridge Investment Research Advisors, Inc.

$230,351

0.08%

18,081

HRT FINANCIAL LP

$203,190

0.07%

15,949

UBS Group AG

$191,201

0.07%

15,008

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS AG	14,419	$183,698	96.1%	Defined
UBS Switzerland AG	489	$6,229	3.3%	Defined
UBS Securities LLC	100	$1,274	0.7%	Defined

Balyasny Asset Management L.P.

$157,237

0.05%

12,342

ExodusPoint Capital Management, LP

$144,420

0.05%

11,336

MILLENNIUM MANAGEMENT LLC

$139,222

0.05%

10,928

XTX Topco Ltd

$138,534

0.05%

10,874

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	10,874	$138,534	100.0%	Defined

MORGAN STANLEY

$82,246

0.03%

6,456

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY & CO INTERNATIONAL PLC	1	$12	0.0%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	516	$6,573	8.0%	Defined
MORGAN STANLEY SMITH BARNEY LLC	1,593	$20,294	24.7%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	4,346	$55,367	67.3%	Defined

Vanguard Global Advisers, LLC

$61,457

0.02%

4,824

FMR LLC

$43,163

0.02%

3,388

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fidelity Management & Research Co LLC	3,388	$43,163	100.0%	Defined

CITIGROUP INC

$36,793

0.01%

2,888

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citigroup Financial Products Inc. joint	2,888	$36,793	100.0%	Defined

Private Wealth Asset Management, LLC

$21,658

0.01%

1,700

Arax Advisory Partners

$14,154

0.00%

1,111

FEDERATED HERMES, INC.

$13,377

0.00%

1,050

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
FEDERATED MDTA LLC	1,050	$13,377	100.0%	Defined

Rockefeller Capital Management L.P.

$7,350

0.00%

577

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
ROCKEFELLER FINANCIAL LLC	577	$7,350	100.0%	Defined

JONES FINANCIAL COMPANIES LLLP

$6,370

0.00%

500

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Edward D. Jones & Co., L.P.	500	$6,370	100.0%	Sole

Russell Investments Group, Ltd.

$5,783

0.00%

454

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Russell Investment Management, LLC	454	$5,783	100.0%	Defined

BNP PARIBAS ARBITRAGE, SA

$3,860

0.00%

303

EverSource Wealth Advisors, LLC

$3,057

0.00%

240

Truvestments Capital LLC

$2,063

0.00%

162

OSAIC HOLDINGS, INC.

$1,579

0.00%

124

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	124	$1,579	100.0%	Defined

Allworth Financial LP

$1,375

0.00%

108

NISA INVESTMENT ADVISORS, LLC

$1,372

0.00%

166

SBI Securities Co., Ltd.

$1,273

0.00%

154

Federation des caisses Desjardins du Quebec

$891

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Desjardins Securities inc.	38	$484	54.3%	Defined
Held directly	32	$407	45.7%	Defined

Clearstead Advisors, LLC

$853

0.00%

Caitong International Asset Management Co., Ltd

$573

0.00%

ROYAL BANK OF CANADA

$547

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC Capital Markets, LLC	28	$356	65.1%	Defined
Held directly	15	$191	34.9%	Sole

GROUP ONE TRADING LLC

$433

0.00%

Physician Wealth Advisors, Inc.

$347

0.00%

HARBOUR INVESTMENTS, INC.

$140

0.00%

DANSKE BANK A/S

$12

0.00%

KERR FINANCIAL PLANNING Corp FIXX

—

600

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