CM
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Castleark Management’s InterDigital IDCC Stock Holding History

Castleark Management’s Portfolio IDCC Stock Details IDCC Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		– Sell
-19,876
Closed -$6M – 328
2026
Q1 		$6M Sell
19,876
-9,060
-31% -$3.08M 0.2% 128
2025
Q4 		$9.21M Buy
28,936
+870
+3% +$308K 0.27% 71
2025
Q3 		$9.69M Sell
28,066
-4,394
-14% -$1.19M 0.27% 70
2025
Q2 		$7.28M Sell
32,460
-960
-3% -$203K 0.22% 83
2025
Q1 		$6.91M Buy
+33,420
New +$6.73M 0.24% 74

Other funds holding IDCC

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Boston Partners
Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Ameriprise
Ameriprise Minneapolis, Minnesota $495B AUM 43.24% 1-Year Est. Return

Castleark Management's IDCC Position: Q2 2026 in Review

Castleark Management sold out of InterDigital (IDCC) in Q2 2026, closing a stake of 19,876 shares — an estimated $6M sold.

Castleark Management first reported a position in IDCC in Q1 2025 and held it in 5 quarters. The position peaked at $9.69M in Q3 2025. 510 funds tracked by Wall St. Rank hold IDCC as of Q2 2026.

  • Castleark Management reported no remaining InterDigital position as of Q2 2026 after selling out during the quarter.
  • Castleark Management sold 19,876 InterDigital shares in Q2 2026, an estimated $6M.
  • Castleark Management first reported a position in InterDigital in Q1 2025 and held it in 5 quarters.
  • Castleark Management's InterDigital position peaked at $9.69M in Q3 2025.
  • 510 funds tracked by Wall St. Rank held InterDigital as of Q2 2026.

Based on Castleark Management's 13F filing for Q2 2026, filed 14 Aug 2026.