Which hedge funds own QSI? QUANTUM SI INC, Q2 2026 13F holders

12 tracked hedge funds disclosed a position in QSI (QUANTUM SI INC) in their Q2 2026 13F filings, worth $5.6m in total. The largest holder by portfolio weight is Atom Investors LP at 0.0% of its book. 8 opened a new position this quarter: Atom Investors LP, Gsa Capital Partners LLP, Millennium Management LLC, Y-Intercept (Hong Kong) Ltd. 7 exited: Ground Swell Capital, LLC, NINE MASTS CAPITAL Ltd, Quantbot Technologies LP.

12

Holders

Tracked managers whose filing for the quarter reports a long equity position in the security.

8

New this quarter

Holders whose previous filing (at most two quarters earlier) did not report the security.

7

Exited this quarter

Tracked managers whose previous filing reported the security and whose filing for the quarter does not.

$3.0m

Inflow, new holders

Combined value of the positions the new holders reported for the quarter.

$140k

Outflow, exits

Combined value the exiting managers reported for the security in their previous filing.

$5.6m

Combined value

Sum of the holders' reported positions in the security.

1.0%

Share of managers holding

Holders as a share of tracked managers filing for that quarter. Comparable across the 2024 coverage expansion, where the raw holder count is not.