WhaleCreepWhat the best hedge funds own, from their SEC 13F filings
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Which hedge funds own QSI? QUANTUM SI INC, Q2 2026 13F holders

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4 of the hedge funds tracked by WhaleCreep disclosed a position in QSI (QUANTUM SI INC) in their Q2 2026 13F filings, worth $3.3m in total. The largest holder by portfolio weight is Millennium Management at 0.0% of its book. 2 managers opened a new position this quarter: Millennium Management, Point72 Asset Management LP.

4tracked managers holding
2opened this quarter
0exited this quarter

Which hedge funds hold QSI? Current holders by portfolio weight

ManagerAs ofWeight of bookValueSharesΔ sharesAction
Millennium ManagementQ2 2026 0.0%$2.8m3,131,726 new
Renaissance Technologies LLCQ2 2026 0.0%$490.2k553,871 370% added
Point72 Asset Management LPQ2 2026 0.0%$34.6k39,133 new
Citadel AdvisorsQ2 2026 0.0%$39.2k44,335 185% added

How has hedge fund ownership of QSI changed?

QuarterManagers holdingCombined value
Q2 20264$3.3m
Q1 20262$103.3k
Q2 20251$174.8k
Q1 20251$1.0m
Q4 20241$1.5m
Q3 20241$36.7k
Q3 20231$996
Q2 20233$4.7m
Q1 20234$7.7m
Q4 20224$9.1m
Q3 20223$15.9m
Q2 20223$13.7m
Q1 20223$30.2m
Q4 20213$52.5m
Q3 20213$64.0m
Q2 20213$115.6m

Counts every tracked manager that disclosed QSI in that quarter's filing, including managers that have since stopped filing.