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Weiss Asset Management’s IDEAYA Biosciences IDYA Stock Holding History

Weiss Asset Management’s Portfolio IDYA Stock Details IDYA Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-23,321
Closed -$635K – 710
2025
Q3 		$635K Buy
+23,321
New +$564K 0.01% 415

Other funds holding IDYA

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London $209B AUM 37.72% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $717B AUM 35.42% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
BBA
Baker Bros. Advisors New York $20B AUM 154.41% 1-Year Est. Return
Federated Hermes
Federated Hermes Pittsburgh, Pennsylvania $69.6B AUM 42.52% 1-Year Est. Return
LGM
Logos Global Management San Francisco, California $2.32B AUM 536.01% 1-Year Est. Return
Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $71.3B AUM 56.8% 1-Year Est. Return

Weiss Asset Management's IDYA Position: Q4 2025 in Review

Weiss Asset Management sold out of IDEAYA Biosciences (IDYA) in Q4 2025, closing a stake of 23,321 shares — an estimated $635K sold.

Weiss Asset Management first reported a position in IDYA in Q3 2025 and held it in 1 quarter. The position peaked at $635K in Q3 2025. 246 funds tracked by Wall St. Rank hold IDYA as of Q4 2025.

  • Weiss Asset Management reported no remaining IDEAYA Biosciences position as of Q4 2025 after selling out during the quarter.
  • Weiss Asset Management sold 23,321 IDEAYA Biosciences shares in Q4 2025, an estimated $635K.
  • Weiss Asset Management first reported a position in IDEAYA Biosciences in Q3 2025 and held it in 1 quarter.
  • Weiss Asset Management's IDEAYA Biosciences position peaked at $635K in Q3 2025.
  • 246 funds tracked by Wall St. Rank held IDEAYA Biosciences as of Q4 2025.

Based on Weiss Asset Management's 13F filing for Q4 2025, filed 17 Feb 2026.