Janus Henderson Group
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Janus Henderson Group’s IDEAYA Biosciences IDYA Stock Holding History

Janus Henderson Group’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
Q1 		$242M Buy
7,265,253
+78,797
+1% +$2.64M 0.12% 175
2025
Q4 		$248M Buy
7,186,456
+758,117
+12% +$24.2M 0.11% 169
2025
Q3 		$175M Buy
6,428,339
+222,101
+4% +$5.37M 0.08% 204
2025
Q2 		$130M Sell
6,206,238
-195,543
-3% -$3.75M 0.06% 231
2025
Q1 		$109M Buy
6,401,781
+544,142
+9% +$11.6M 0.06% 254
2024
Q4 		$151M Buy
5,857,639
+695,263
+13% +$19.7M 0.08% 223
2024
Q3 		$164M Buy
5,162,376
+1,086,356
+27% +$41.2M 0.08% 213
2024
Q2 		$143M Buy
4,076,020
+267,570
+7% +$10.6M 0.08% 217
2024
Q1 		$167M Buy
3,808,450
+256,559
+7% +$11M 0.09% 200
2023
Q4 		$126M Buy
3,551,891
+1,828,731
+106% +$54.6M 0.08% 226
2023
Q3 		$46.5M Buy
1,723,160
+55,637
+3% +$1.41M 0.03% 372
2023
Q2 		$39.2M Buy
1,667,523
+1,009,626
+153% +$20.8M 0.02% 436
2023
Q1 		$9.05M Sell
657,897
-26,080
-4% -$434K 0.01% 723
2022
Q4 		$12.4M Sell
683,977
-678,377
-50% -$11.4M 0.01% 673
2022
Q3 		$20.3M Buy
1,362,354
+1,066,187
+360% +$13.8M 0.01% 672
2022
Q2 		$4.09M Sell
296,167
-150,460
-34% -$1.67M ﹤0.01% 877
2022
Q1 		$5M Buy
446,627
+172,305
+63% +$2.54M ﹤0.01% 1012
2021
Q4 		$6.5M Buy
274,322
+6,332
+2% +$147K ﹤0.01% 1007
2021
Q3 		$6.83M Buy
+267,990
New +$6.26M ﹤0.01% 981

Other funds holding IDYA

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return
BBA
Baker Bros. Advisors New York $17.4B AUM 131.5% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
LGM
Logos Global Management San Francisco, California $2B AUM 444.09% 1-Year Est. Return
Federated Hermes
Federated Hermes Pittsburgh, Pennsylvania $61.5B AUM 30.7% 1-Year Est. Return
Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $64.8B AUM 42.7% 1-Year Est. Return
Fiera Capital (Canada)
Fiera Capital (Canada) Montreal, Quebec, Canada $29.2B AUM 20.16% 1-Year Est. Return

Janus Henderson Group's IDYA Position: Q1 2026 in Review

Janus Henderson Group increased its IDEAYA Biosciences (IDYA) stake by 1.1% in Q1 2026, buying an estimated $2.64M and bringing the position to 7,265,253 shares worth $242M. The position accounts for 0.12% of the portfolio, ranked #175.

Janus Henderson Group first reported a position in IDYA in Q3 2021 and has held it in 19 quarters since. The position peaked at $248M in Q4 2025. 253 funds tracked by Wall St. Rank hold IDYA as of Q1 2026.

  • Janus Henderson Group held 7,265,253 shares of IDEAYA Biosciences worth $242M as of Q1 2026.
  • Janus Henderson Group bought 78,797 IDEAYA Biosciences shares in Q1 2026, an estimated $2.64M.
  • IDEAYA Biosciences made up 0.12% of Janus Henderson Group's portfolio in Q1 2026, its #175 holding.
  • Janus Henderson Group first reported a position in IDEAYA Biosciences in Q3 2021 and has held it in 19 quarters since.
  • Janus Henderson Group's IDEAYA Biosciences position peaked at $248M in Q4 2025.
  • 253 funds tracked by Wall St. Rank held IDEAYA Biosciences as of Q1 2026.

Based on Janus Henderson Group's 13F filing for Q1 2026, filed 15 May 2026.