PDT Partners’s SiriusXM SIRI Stock Holding History

PDT Partners’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	$12M	Sell	404,711 -70,475	-15%	-$1.89M	0.63%	39
2026 Q1	$11M	Buy	+475,186	New	+$10.2M	0.65%	30
2022 Q2	–	Sell	-28,612	Closed	-$1.89M	–	1137
2022 Q1	$1.89M	Sell	28,612 -16,340	-36%	-$1.03M	0.16%	190
2021 Q4	$2.85M	Sell	44,952 -8,452	-16%	-$529K	0.22%	163
2021 Q3	$3.26M	Buy	53,404 +2,954	+6%	+$186K	0.23%	193
2021 Q2	$3.3M	Buy	+50,450	New	+$3.16M	0.22%	207
2021 Q1	–	Sell	-80,960	Closed	-$5.16M	–	875
2020 Q4	$5.16M	Sell	80,960 -31,380	-28%	-$1.93M	0.35%	117
2020 Q3	$6.02M	Sell	112,340 -1,360	-1%	-$78K	0.4%	96
2020 Q2	$6.67M	Sell	113,700 -7,170	-6%	-$402K	0.45%	84
2020 Q1	$5.97M	Buy	120,870 +5,189	+4%	+$339K	0.47%	74
2019 Q4	$8.27M	Sell	115,681 -5,189	-4%	-$350K	0.51%	79
2019 Q3	$7.56M	Buy	120,870 +96,260	+391%	+$5.92M	0.45%	88
2019 Q2	$1.37M	Buy	+24,610	New	+$1.4M	0.08%	224

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

PDT Partners's SIRI Position: Q2 2026 in Review

PDT Partners reduced its SiriusXM (SIRI) stake by 15% in Q2 2026, selling an estimated $1.89M and leaving 404,711 shares worth $12M. The position accounts for 0.63% of the portfolio, ranked #39.

PDT Partners first reported a position in SIRI in Q2 2019 and has held it in 13 quarters since. 601 funds tracked by Wall St. Rank hold SIRI as of Q2 2026.

PDT Partners held 404,711 shares of SiriusXM worth $12M as of Q2 2026.
PDT Partners sold 70,475 SiriusXM shares in Q2 2026, an estimated $1.89M.
SiriusXM made up 0.63% of PDT Partners's portfolio in Q2 2026, its #39 holding.
PDT Partners first reported a position in SiriusXM in Q2 2019 and has held it in 13 quarters since.
601 funds tracked by Wall St. Rank held SiriusXM as of Q2 2026.

Based on PDT Partners's 13F filing for Q2 2026, filed 14 Aug 2026.