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Jeff Yass’s IDEAYA Biosciences IDYA Stock Holding History

Jeff Yass’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
2026
Q2 		$6.37M Buy
170,800
+55,600
+48% +$1.7M ﹤0.01% 4170
2026
Q1 		$3.84M Buy
115,200
+46,200
+67% +$1.55M ﹤0.01% 4756
2025
Q4 		$2.39M Buy
69,000
+36,200
+110% +$1.15M ﹤0.01% 5278
2025
Q3 		$892K Sell
32,800
-3,100
-9% -$75K ﹤0.01% 7610
2025
Q2 		$755K Buy
+35,900
New +$689K ﹤0.01% 8165
2024
Q4 		– Sell
-13,300
Closed -$421K – 12651
2024
Q3 		$421K Buy
13,300
+1,500
+13% +$56.9K ﹤0.01% 8876
2024
Q2 		$414K Buy
11,800
+5,800
+97% +$230K ﹤0.01% 8724
2024
Q1 		$263K Sell
6,000
-4,800
-44% -$206K ﹤0.01% 10008
2023
Q4 		$384K Sell
10,800
-2,300
-18% -$68.7K ﹤0.01% 9283
2023
Q3 		$353K Sell
13,100
-49,200
-79% -$1.25M ﹤0.01% 9004
2023
Q2 		$1.46M Buy
+62,300
New +$1.28M ﹤0.01% 5824
2021
Q1 		– Sell
-11,100
Closed -$155K – 12493
2020
Q4 		$155K Buy
+11,100
New +$150K ﹤0.01% 10230

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
JT
Jupiter Topco New York $245B AUM
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $717B AUM 35.42% 1-Year Est. Return
BBA
Baker Bros. Advisors New York $20B AUM 154.41% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
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
DM
Deerfield Management New York $9.59B AUM 113.36% 1-Year Est. Return

Jeff Yass's IDYA Position: Q2 2026 in Review

Jeff Yass reduced its IDEAYA Biosciences (IDYA) stake by 35% in Q2 2026, selling an estimated $507K and leaving 30,148 shares worth $1.12M. The position accounts for ﹤0.01% of the portfolio, ranked #7898.

Jeff Yass first reported a position in IDYA in Q4 2019 and has held it in 25 quarters since. The position peaked at $3.03M in Q2 2025. 283 funds tracked by Wall St. Rank hold IDYA as of Q2 2026.

  • Jeff Yass held 30,148 shares of IDEAYA Biosciences worth $1.12M as of Q2 2026.
  • Jeff Yass sold 16,561 IDEAYA Biosciences shares in Q2 2026, an estimated $507K.
  • IDEAYA Biosciences made up ﹤0.01% of Jeff Yass's portfolio in Q2 2026, its #7898 holding.
  • Jeff Yass first reported a position in IDEAYA Biosciences in Q4 2019 and has held it in 25 quarters since.
  • Jeff Yass's IDEAYA Biosciences position peaked at $3.03M in Q2 2025.
  • 283 funds tracked by Wall St. Rank held IDEAYA Biosciences as of Q2 2026.

Based on Susquehanna International Group's 13F filing for Q2 2026, filed 14 Aug 2026.