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CastleKnight Management’s SiriusXM SIRI Stock Holding History

CastleKnight Management’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
Q1 		$9.55M Buy
413,700
+274,700
+198% +$5.9M 0.16% 83
2025
Q4 		$2.78M Buy
139,000
+87,400
+169% +$1.88M 0.06% 164
2025
Q3 		$1.2M Buy
+51,600
New +$1.19M 0.02% 298
2023
Q2 		– Sell
-8,940
Closed -$355K – 332
2023
Q1 		$355K Buy
+8,940
New +$428K 0.04% 211

Other funds holding SIRI

Berkshire Hathaway
Berkshire Hathaway Omaha, Nebraska $263B AUM 16.68% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
KCMH
Kontiki Capital Management (HK) Hong Kong $1.43B AUM 9.81% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
Canada Pension Plan Investment Board
Canada Pension Plan Investment Board Toronto Ontario, Ontario, Canada $155B AUM 29.93% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

CastleKnight Management's SIRI Position: Q1 2026 in Review

CastleKnight Management increased its SiriusXM (SIRI) stake by 198% in Q1 2026, buying an estimated $5.9M and bringing the position to 413,700 shares worth $9.55M. The position accounts for 0.16% of the portfolio, ranked #83.

CastleKnight Management first reported a position in SIRI in Q1 2023 and has held it in 4 quarters since. 559 funds tracked by Wall St. Rank hold SIRI as of Q1 2026.

  • CastleKnight Management held 413,700 shares of SiriusXM worth $9.55M as of Q1 2026.
  • CastleKnight Management bought 274,700 SiriusXM shares in Q1 2026, an estimated $5.9M.
  • SiriusXM made up 0.16% of CastleKnight Management's portfolio in Q1 2026, its #83 holding.
  • CastleKnight Management first reported a position in SiriusXM in Q1 2023 and has held it in 4 quarters since.
  • 559 funds tracked by Wall St. Rank held SiriusXM as of Q1 2026.

Based on CastleKnight Management's 13F filing for Q1 2026, filed 15 May 2026.