$QUBT

$6.89 +$0.48 (7.41%) Live

$QUBT Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 226.3M shares outstanding

Who owns QUBT?

By type of holder

Institutions 44.9% Insiders 11.7% Everyone else 43.4%

Concentration Top 10 holders own 38.1%

Yuping Huang 10.3% · BlackRock, Inc. 7.8%

Institutional ownership

44.9%

+3.9 pts vs last qtr

Institutional holders

311

+17 vs last qtr

Net shares bought

+8.7M

by institutions in Q2 2026

New / sold out

67 / 50

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Penserra Capital Management LLC +3.6M
Defiance ETFs, LLC +2.5M

Biggest sellers in Q2 2026

Marex Group Ltd −2.2M
HRT Financial LP SOLD OUT −1.3M

Who is planning to sell?

Notices of proposed sale, last 12 months

$614K

2 notices from 1 person

Shares covered

78.3K

0.03% of the company

Arranged in advance

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Christopher Roberts Officer $614K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2021–FY2025

−99.4%

−72.59% a year

Each share's claim on the business

+17625.4%

grew without buying or selling a share

Spent on buybacks vs paid in stock

— vs $38.2M

over 5 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years0% 3–5 years52% 1–3 years31% Under 1 year17%

Quarterly turnover

17.1%

of institutional shares changed hands

Top 10 managers, median time held

4.8 years

Super Investors

Investment managers reporting QUBT on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	17.7M	7.83%	+1.6M (+9.9%)	2021	0.0%
Shares held by quarter Peak holding17.7M (Q2'26) Change over 8 quarters+17.4M Share of the company7.830% BlackRock, Inc.'s full portfolio →
VC Vanguard Capital Management LLC	8.8M	3.91%	+86.6K (+1.0%)	2021	0.0%
Shares held by quarter Peak holding8.8M (Q2'26) Change over 8 quarters+8.8M Share of the company3.910% Vanguard Capital Management LLC's full portfolio →

BlackRock, Inc.

17.7M

% of company

7.83%

Change vs last qtr

+1.6M (+9.9%)

Held since

2021

Vanguard Capital Management LLC

8.8M

% of company

3.91%

Change vs last qtr

+86.6K (+1.0%)

Held since

2021

28 more super investors behind a free account

See every manager holding Quantum Computing Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting QUBT on Form N-PORT; together they hold 20.0% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
DQ Defiance Quantum ETF ETF Series Solutions	$67.7M	7.0M	3.08%	1.08%	June 30, 2026
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$62.5M	6.4M	2.85%	0.00%	June 30, 2026

Defiance Quantum ETF

ETF Series Solutions

Position value

$67.7M

% of company

3.08%

% of the fund

1.08%

As of

June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$62.5M

% of company

2.85%

% of the fund

0.00%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Quantum Computing Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
YH Yuping Huang 5%+ holder 13D · 10.3%	23.3M	10.29%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company10.290% Disclosed stake13D · 10.3% View the 13D/G filing →
MW McGann William J Insider	1.2M	0.55%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.550% McGann William J's insider activity →

Yuping Huang

5%+ holder13D · 10.3%

23.3M

% of company

10.29%

Change vs last qtr

—

Held since

—

McGann William J

Insider

1.2M

% of company

0.55%

Change vs last qtr

—

Held since

—

10 more holders behind a free account

See every insider and 5%+ holder of Quantum Computing Inc..

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