Quantum-Si Ownership | Who Owns Quantum-Si?

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Quantum-Si Ownership Summary

Quantum-Si is owned by 35.03% institutional investors, 12.49% insiders, and 52.48% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 5.91% of QSI shares. ARK Genomic Revolution is the top mutual fund, with 3.84% of its assets in Quantum-Si shares.

QSI Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Quantum-Si	35.03%	12.49%	52.48%
Sector	Healthcare Stocks	488.17%	11.08%	-399.26%
Industry	Biotech Stocks	306.59%	11.10%	-217.69%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	10.85M	5.91%	$21.26M
Blackrock	7.00M	4.94%	$7.35M
Ark investment management	7.96M	4.34%	$15.60M
Sumitomo mitsui trust	5.97M	4.19%	$16.11B
Vanguard group	5.49M	3.86%	$14.83M
Nikko asset management americas	5.62M	3.06%	$11.02M
Millennium management	3.93M	2.75%	$4.72M
State street	2.37M	1.67%	$2.49M
Geode capital management	2.37M	1.66%	$6.40M
Susquehanna group, llp	1.00M	0.70%	$2.71M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Green alpha advisors	228.35K	0.43%	$447.56K
Fosun	743.93K	0.41%	$1.46M
Ark investment management	7.96M	0.11%	$15.60M
Nikko asset management americas	5.62M	0.11%	$11.02M
Gsa capital partners llp	374.28K	0.07%	$1.01M
Knollwood investment advisory	300.00K	0.06%	$588.00K
Ewa	68.20K	0.04%	$133.67K
Red wave investments	37.00K	0.03%	$99.90K
Shay capital	129.63K	0.03%	$254.08K
Dlk investment management	19.00K	0.02%	$51.30K

Top Buyers

Holder	Shares	% Assets	Change
Millennium management	3.93M	0.00%	3.93M
Blackrock funding, inc. /de	10.85M	0.00%	1.41M
Susquehanna group, llp	1.00M	0.00%	958.84K
Goldman sachs group	1.00M	0.00%	759.99K
Ubs group	592.11K	0.00%	542.95K

Top Sellers

Holder	Shares	% Assets	Change
Sumitomo mitsui trust	5.97M	0.01%	-1.58M
Ark investment management	7.96M	0.11%	-752.76K
Xtx topco	46.47K	0.00%	-322.49K
General american investors	-	-	-294.35K
Nuveen asset management	319.10K	0.00%	-245.98K

New Positions

Holder	Shares	% Assets	Change	Value
Manufacturers life insurance company, the	34.85K	0.00%	34.85K	$94.09K
Bnp paribas arbitrage, snc	19.02K	-	19.02K	$51.37K
Cerity partners	14.88K	0.00%	14.88K	$29.17K
Jtc employer solutions trustee	13.34K	0.00%	13.34K	$26.00K
American century companies	12.04K	-	12.04K	$23.59K

Sold Out

Holder	Change
True wealth design	-2.00
Rothschild investment	-75.00
American capital advisory	-100.00
Founders capital management	-100.00
Parkside financial bank & trust	-150.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2025	142	-1.39%	64,328,730	11.47%	35	3.50%	72	-5.26%	31	-13.89%
Mar 31, 2025	4	-96.95%	3,968,868	-92.60%	2	0.20%	2	-97.40%	1	-95.45%
Dec 31, 2024	63	-42.73%	40,587,687	-21.92%	28	2.14%	37	-13.95%	8	-75.00%
Sep 30, 2024	110	8.91%	51,983,353	-2.83%	36	2.56%	43	-2.27%	32	6.67%
Jun 30, 2024	101	3.06%	53,496,649	1.12%	37	2.70%	44	29.41%	30	-16.67%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
ARK Genomic Revolution	7.78M	3.84%	-794.51K
ARK Genomic Revolution ETF	7.70M	3.82%	-46.19K
Vanguard Total Stock Mkt Idx Inv	4.60M	2.27%	-101.41K
Nikko AM ARK Pstv Chg Innovt P JPY Acc	4.52M	2.24%	-60.89K
Amova ARK Pstv Chg Innovt P JPY Acc	4.52M	2.23%	-
iShares Russell 2000 ETF	3.32M	1.64%	-63.10K
Nikko Gbl All Biological Genome Eq MF	2.02M	1.42%	-343.46K
Vanguard Institutional Extnd Mkt Idx Tr	1.51M	0.74%	-673.51K
Fidelity Small Cap Index	1.42M	0.70%	190.63K
iShares Russell 2000 Value ETF	1.22M	0.60%	902.00

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jun 23, 2025	Hawkins Jeffrey Alan	President & CEO	Sell	$38.26K
Jun 23, 2025	Vieceli John S.	Chief Product Officer	Sell	$35.38K
Jun 23, 2025	LaPointe Christian	GC & Corp. Secretary	Sell	$19.28K
Jun 23, 2025	Keyes Jeffry R.	Chief Financial Officer	Sell	$13.92K
Mar 21, 2025	Hawkins Jeffrey Alan	President & CEO	Sell	$32.85K

Insider Transactions Trends

Date	Buy	Sell
2025 Q2	-	4
2025 Q1	-	4
2024 Q4	-	3
2024 Q3	5	2
2024 Q2	-	2

QSI Ownership FAQ

Who Owns Quantum-Si?

Quantum-Si shareholders are primarily institutional investors at 35.03%, followed by 12.49% insiders and 52.48% retail investors. The average institutional ownership in Quantum-Si's industry, Biotech Stocks , is 306.59%, which Quantum-Si falls below.

Who owns the most shares of Quantum-Si?

Quantum-Si’s largest shareholders are Blackrock funding, inc. /de (10.85M shares, 5.91%), Blackrock (7M shares, 4.94%), and Ark investment management (7.96M shares, 4.34%). Together, they hold 15.18% of Quantum-Si’s total shares outstanding.

Does Blackrock own Quantum-Si?

Yes, BlackRock owns 4.94% of Quantum-Si, totaling 7M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 7.35M$. In the last quarter, BlackRock decreased its holdings by -231K shares, a -3.20% change.

Who is Quantum-Si’s biggest shareholder by percentage of total assets invested?

Green alpha advisors is Quantum-Si’s biggest shareholder by percentage of total assets invested, with 0.43% of its assets in 228.35K Quantum-Si shares, valued at 447.56K$.

Who is the top mutual fund holder of Quantum-Si shares?

ARK Genomic Revolution is the top mutual fund holder of Quantum-Si shares, with 3.84% of its total shares outstanding invested in 7.78M Quantum-Si shares.

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