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Quantum-Si Ownership | Who Owns Quantum-Si?

OverviewRevenueFinancialsChartTranscripts

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

TypeName% Inst% Insiders% Retail
StockQuantum-Si35.03%12.49%52.48%
SectorHealthcare Stocks 487.91%11.08%-398.99%
IndustryBiotech Stocks 307.10%11.11%-218.21%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Blackrock funding, inc. /de10.85M5.91%$21.26M
Blackrock7.00M4.94%$7.35M
Ark investment management7.96M4.34%$15.60M
Vanguard group5.49M3.86%$14.83M
Nikko asset management americas5.62M3.06%$11.02M
Sumitomo mitsui trust5.22M2.84%$7.36M
Millennium management3.93M2.75%$4.72M
State street2.37M1.67%$2.49M
Geode capital management2.37M1.66%$6.40M
Susquehanna group, llp1.00M0.70%$2.71M

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Fosun743.93K0.41%$1.46M
Green alpha advisors216.03K0.29%$304.61K
Ark investment management7.96M0.11%$15.60M
Elite life management20.61K0.11%$54.21K
Nikko asset management americas5.62M0.11%$11.02M
Gsa capital partners llp374.28K0.07%$1.01M
Knollwood investment advisory300.00K0.06%$588.00K
Ewa68.20K0.04%$133.67K
Shay capital129.63K0.03%$254.08K
Iq eq fund management (ireland)116.83K0.02%$228.98K

Top Buyers

HolderShares% AssetsChange
Millennium management3.93M0.00%3.93M
Blackrock funding, inc. /de10.85M0.00%1.41M
Susquehanna group, llp1.00M0.00%958.84K
Goldman sachs group1.00M0.00%759.99K
Ubs group592.11K0.00%542.95K

Top Sellers

HolderShares% AssetsChange
Ark investment management7.96M0.11%-752.76K
Sumitomo mitsui trust5.22M0.00%-403.80K
Xtx topco46.47K0.00%-322.49K
General american investors---294.35K
Nuveen asset management319.10K0.00%-245.98K

New Positions

HolderShares% AssetsChangeValue
Manufacturers life insurance company, the34.85K0.00%34.85K$94.09K
Hbk sorce advisory21.43K0.00%21.43K$37.93K
Elite life management20.61K0.11%20.61K$54.21K
Bnp paribas arbitrage, snc19.02K-19.02K$51.37K
American century companies12.04K-12.04K$23.59K

Sold Out

HolderChange
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

DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Jun 30, 2025142-1.39%64,328,73011.47%353.50%72-5.26%31-13.89%
Mar 31, 20254-96.95%3,968,868-92.60%20.20%2-97.40%1-95.45%
Dec 31, 202463-42.73%40,587,687-21.92%282.14%37-13.95%8-75.00%
Sep 30, 20241108.91%51,983,353-2.83%362.56%43-2.27%326.67%
Jun 30, 20241013.06%53,496,6491.12%372.70%4429.41%30-16.67%

Top Mutual Funds Shareholders

HolderShares% HoldingChange
ARK Genomic Revolution7.78M3.84%-794.51K
ARK Genomic Revolution ETF7.77M3.84%-27.71K
Vanguard Total Stock Mkt Idx Inv4.60M2.27%-101.41K
Nikko AM ARK Pstv Chg Innovt P JPY Acc4.52M2.24%-60.89K
Amova ARK Pstv Chg Innovt P JPY Acc4.52M2.23%-
iShares Russell 2000 ETF3.40M1.68%-
Nikko Gbl All Biological Genome Eq MF2.02M1.42%-343.46K
Vanguard Institutional Extnd Mkt Idx Tr1.51M0.74%-673.51K
Fidelity Small Cap Index1.42M0.70%190.63K
iShares Russell 2000 Value ETF1.22M0.60%-

Recent Insider Transactions

DateNameRoleActivityValue
Oct 16, 2025ROTHBERG JONATHAN M Sell$80.11K
Sep 22, 2025LaPointe Christian GC & Corp. SecretarySell$9.03K
Sep 23, 2025LaPointe Christian GC & Corp. SecretarySell$8.77K
Sep 22, 2025Hawkins Jeffrey Alan President & CEOSell$17.91K
Sep 23, 2025Hawkins Jeffrey Alan President & CEOSell$17.40K

Insider Transactions Trends

DateBuySell
2025 Q4-1
2025 Q3-10
2025 Q2-4
2025 Q1-4
2024 Q4-3

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 307.10%, 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?

Fosun is Quantum-Si’s biggest shareholder by percentage of total assets invested, with 0.41% of its assets in 743.94K Quantum-Si shares, valued at 1.46M$.

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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