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Mark Sheptoff Financial Planning’s Quantum-Si Incorporated QSI Stock Holding History

Mark Sheptoff Financial Planning’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
2025
Q4 		– Sell
-10,500
Closed -$14.8K – 522
2025
Q3 		$14.8K Sell
10,500
-4,000
-28% -$5.78K 0.01% 305
2025
Q2 		$28.4K Hold
14,500
– – 0.02% 233
2025
Q1 		$17.4K Buy
14,500
+7,500
+107% +$14.4K 0.01% 258
2024
Q4 		$18.9K Buy
+7,000
New +$8.2K 0.01% 262

Other funds holding QSI

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
ARK Investment Management
ARK Investment Management St. Petersburg, Florida $15.4B AUM 50.29% 1-Year Est. Return
Sumitomo Mitsui Trust Group
Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $175B AUM 40.63% 1-Year Est. Return
Nikko Asset Management Americas
Nikko Asset Management Americas New York $7.75B AUM 33.73% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $875B AUM 40.89% 1-Year Est. Return
Susquehanna International Group
Susquehanna International Group Bala Cynwyd, Pennsylvania $1.28T AUM 58.89% 1-Year Est. Return
Northern Trust
Northern Trust Chicago, Illinois $860B AUM 41.15% 1-Year Est. Return

Mark Sheptoff Financial Planning's QSI Position: Q4 2025 in Review

Mark Sheptoff Financial Planning sold out of Quantum-Si Incorporated (QSI) in Q4 2025, closing a stake of 10,500 shares — an estimated $14.8K sold.

Mark Sheptoff Financial Planning first reported a position in QSI in Q4 2024 and held it in 4 quarters. The position peaked at $28.4K in Q2 2025. 135 funds tracked by Wall St. Rank hold QSI as of Q4 2025.

  • Mark Sheptoff Financial Planning reported no remaining Quantum-Si Incorporated position as of Q4 2025 after selling out during the quarter.
  • Mark Sheptoff Financial Planning sold 10,500 Quantum-Si Incorporated shares in Q4 2025, an estimated $14.8K.
  • Mark Sheptoff Financial Planning first reported a position in Quantum-Si Incorporated in Q4 2024 and held it in 4 quarters.
  • Mark Sheptoff Financial Planning's Quantum-Si Incorporated position peaked at $28.4K in Q2 2025.
  • 135 funds tracked by Wall St. Rank held Quantum-Si Incorporated as of Q4 2025.

Based on Mark Sheptoff Financial Planning's 13F filing for Q4 2025, filed 12 Feb 2026.