PEAK6’s SiriusXM SIRI Stock Holding History

PEAK6’s Portfolio SIRI Stock Details SIRI Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$9.38M	Buy	+317,500	New	+$8.53M	0.02%	606
2026 Q1	–	Sell	-20,500	Closed	-$410K	–	3260
2025 Q4	$410K	Buy	+20,500	New	+$441K	﹤0.01%	2178

Other funds holding SIRI

Berkshire Hathaway Omaha, Nebraska $299B AUM 27.55% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

KCMH

Kontiki Capital Management (HK) Hong Kong $1.52B AUM 10.48% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

CCM

Check Capital Management Costa Mesa, California $7.52B AUM 15.3% 1-Year Est. Return

Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return

GCM

Gates Capital Management New York $4.16B AUM 21% 1-Year Est. Return

PEAK6's SIRI Position: Q2 2026 in Review

PEAK6 sold out of SiriusXM (SIRI) in Q2 2026, closing a stake of 6,111 shares — an estimated $164K sold.

PEAK6 first reported a position in SIRI in Q1 2025 and held it in 4 quarters. The position peaked at $374K in Q4 2025. 600 funds tracked by Wall St. Rank hold SIRI as of Q2 2026.

PEAK6 reported no remaining SiriusXM position as of Q2 2026 after selling out during the quarter.
PEAK6 sold 6,111 SiriusXM shares in Q2 2026, an estimated $164K.
PEAK6 first reported a position in SiriusXM in Q1 2025 and held it in 4 quarters.
PEAK6's SiriusXM position peaked at $374K in Q4 2025.
600 funds tracked by Wall St. Rank held SiriusXM as of Q2 2026.

Based on PEAK6's 13F filing for Q2 2026, filed 13 Aug 2026.