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BlackRock’s Quantum-Si Incorporated QSI Stock Holding History

BlackRock’s Portfolio QSI Stock Details QSI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$10.4M Buy
13,414,949
+360,892
+3% +$374K ﹤0.01% 3489
2025
Q4 		$14.4M Buy
13,054,057
+1,732,384
+15% +$2.82M ﹤0.01% 3278
2025
Q3 		$16M Buy
11,321,673
+473,531
+4% +$684K ﹤0.01% 3223
2025
Q2 		$21.3M Buy
10,848,142
+1,407,899
+15% +$2.08M ﹤0.01% 2987
2025
Q1 		$11.3M Buy
9,440,243
+1,002,596
+12% +$1.92M ﹤0.01% 3254
2024
Q4 		$22.8M Buy
8,437,647
+1,537,520
+22% +$1.8M ﹤0.01% 2964
2024
Q3 		$6.09M Sell
6,900,127
-100,757
-1% -$97.8K ﹤0.01% 3625
2024
Q2 		$7.35M Sell
7,000,884
-231,111
-3% -$371K ﹤0.01% 3539
2024
Q1 		$14.2M Sell
7,231,995
-151,576
-2% -$265K ﹤0.01% 3171
2023
Q4 		$14.8M Buy
7,383,571
+370,542
+5% +$565K ﹤0.01% 3182
2023
Q3 		$11.6M Sell
7,013,029
-88,949
-1% -$214K ﹤0.01% 3246
2023
Q2 		$12.7M Buy
7,101,978
+1,018,153
+17% +$1.6M ﹤0.01% 3299
2023
Q1 		$10.7M Sell
6,083,825
-377,684
-6% -$745K ﹤0.01% 3282
2022
Q4 		$11.8M Buy
6,461,509
+106,769
+2% +$275K ﹤0.01% 3317
2022
Q3 		$17.5M Buy
6,354,740
+134,546
+2% +$430K ﹤0.01% 3108
2022
Q2 		$14.4M Buy
6,220,194
+4,657,699
+298% +$17.8M ﹤0.01% 3286
2022
Q1 		$7.31M Buy
1,562,495
+29,793
+2% +$145K ﹤0.01% 3753
2021
Q4 		$12.1M Buy
1,532,702
+378,586
+33% +$2.85M ﹤0.01% 3559
2021
Q3 		$9.63M Buy
+1,154,116
New +$11.4M ﹤0.01% 3693

Other funds holding QSI

VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
AIM
ARK Investment Management St. Petersburg, Florida $12.9B AUM 64.92% 1-Year Est. Return
NAMA
Nikko Asset Management Americas New York $7.07B AUM 50.91% 1-Year Est. Return
Sumitomo Mitsui Trust Group
Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $175B AUM 40.63% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Susquehanna International Group
Susquehanna International Group Bala Cynwyd, Pennsylvania $893B AUM 36.07% 1-Year Est. Return

BlackRock's QSI Position: Q1 2026 in Review

BlackRock increased its Quantum-Si Incorporated (QSI) stake by 2.8% in Q1 2026, buying an estimated $374K and bringing the position to 13,414,949 shares worth $10.4M. The position accounts for ﹤0.01% of the portfolio, ranked #3489.

BlackRock first reported a position in QSI in Q3 2021 and has held it in 19 quarters since. The position peaked at $22.8M in Q4 2024. 156 funds tracked by Wall St. Rank hold QSI as of Q1 2026.

  • BlackRock held 13,414,949 shares of Quantum-Si Incorporated worth $10.4M as of Q1 2026.
  • BlackRock bought 360,892 Quantum-Si Incorporated shares in Q1 2026, an estimated $374K.
  • Quantum-Si Incorporated made up ﹤0.01% of BlackRock's portfolio in Q1 2026, its #3489 holding.
  • BlackRock first reported a position in Quantum-Si Incorporated in Q3 2021 and has held it in 19 quarters since.
  • BlackRock's Quantum-Si Incorporated position peaked at $22.8M in Q4 2024.
  • 156 funds tracked by Wall St. Rank held Quantum-Si Incorporated as of Q1 2026.

Based on BlackRock's 13F filing for Q1 2026, filed 13 May 2026.