Jane Street’s Quantum Biopharma Class B Subordinate Voting Shares QNTM Stock Holding History

Jane Street’s Portfolio QNTM Stock Details QNTM Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$175K	Buy	48,355 +16,854	+54%	+$79.6K	﹤0.01%	10235
2026 Q1	$152K	Buy	31,501 +20,609	+189%	+$92.9K	﹤0.01%	10377
2025 Q4	$79.5K	Buy	+10,892	New	+$119K	﹤0.01%	10308
2024 Q3	–	Sell	-1,602	Closed	-$17.5K	–	10590
2024 Q2	$17.5K	Buy	+1,602	New	+$39.1K	﹤0.01%	9052
2023 Q4	–	Sell	-263	Closed	-$20.7K	–	9929
2023 Q3	$20.7K	Buy	+263	New	+$21.5K	﹤0.01%	8300
2023 Q1	–	Sell	-385	Closed	-$19.2K	–	10094
2022 Q4	$19.2K	Buy	385 +112	+41%	+$6.2K	﹤0.01%	8619
2022 Q3	$14K	Buy	+273	New	+$16K	﹤0.01%	9278
2022 Q2	–	Sell	-365	Closed	-$21K	–	11123
2022 Q1	$21K	Buy	365 +209	+134%	+$12.7K	﹤0.01%	9927
2021 Q4	$11K	Buy	+156	New	+$13.5K	﹤0.01%	9899
2021 Q2	–	Sell	-251	Closed	-$31K	–	10536
2021 Q1	$31K	Buy	+251	New	+$35.1K	﹤0.01%	8926

Other funds holding QNTM

AdvisorShares Investments Bethesda, Maryland $828M AUM 37.72% 1-Year Est. Return

PTP

Platform Technology Partners New York $611M AUM 25.5% 1-Year Est. Return

UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return

SPIA

Steward Partners Investment Advisory New York $19.6B AUM 29.84% 1-Year Est. Return

Citadel Advisors Miami, Florida $875B AUM 40.89% 1-Year Est. Return

Marex Group London $23.6B AUM 57.16% 1-Year Est. Return

Mariner Overland Park, Kansas $95.2B AUM 32.92% 1-Year Est. Return

NBC Securities Birmingham, Alabama $1.48B AUM 31.07% 1-Year Est. Return

Osaic Holdings Scottsdale, Arizona $85.1B AUM 27.35% 1-Year Est. Return

GRP

Global Retirement Partners San Rafael, California $6.54B AUM

Jane Street's QNTM Position: Q2 2026 in Review

Jane Street increased its Quantum Biopharma Class B Subordinate Voting Shares (QNTM) stake by 54% in Q2 2026, buying an estimated $79.6K and bringing the position to 48,355 shares worth $175K. The position accounts for ﹤0.01% of the portfolio, ranked #10235.

Jane Street first reported a position in QNTM in Q1 2021 and has held it in 10 quarters since. 26 funds tracked by Wall St. Rank hold QNTM as of Q2 2026.

Jane Street held 48,355 shares of Quantum Biopharma Class B Subordinate Voting Shares worth $175K as of Q2 2026.
Jane Street bought 16,854 Quantum Biopharma Class B Subordinate Voting Shares shares in Q2 2026, an estimated $79.6K.
Quantum Biopharma Class B Subordinate Voting Shares made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #10235 holding.
Jane Street first reported a position in Quantum Biopharma Class B Subordinate Voting Shares in Q1 2021 and has held it in 10 quarters since.
26 funds tracked by Wall St. Rank held Quantum Biopharma Class B Subordinate Voting Shares as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.