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IDEAYA Biosciences
IDYA

282 hedge funds and large institutions have $3.8B invested in IDEAYA Biosciences in 2026 Q2 according to their latest regulatory filings, with 66 funds opening new positions, 91 increasing their positions, 88 reducing their positions, and 33 closing their positions.

New
Increased
Maintained
Reduced
Closed

100% more first-time investments, than exits

New positions opened: 66 | Existing positions closed: 33

67% more funds holding in top 10

Funds holding in top 10: 3 → 5 (+2)

43% more call options, than puts

Call options by funds: $15.8M | Put options by funds: $11.1M

20% more capital invested

Capital invested by funds: $3.16B → $3.8B (+$641M)

11% more funds holding

Funds holding: 253 → 282 (+29)

8.37% more ownership

Funds ownership: 107.83% → 116.2% (+8.4%)

3% more repeat investments, than reductions

Existing positions increased: 91 | Existing positions reduced: 88

Holders
282
Holders Change
+29
Holders Change %
+11.46%
% of All Funds
3.41%
Holding in Top 10
5
Holding in Top 10 Change
+2
Holding in Top 10 Change %
+66.67%
% of All Funds
0.06%
New
66
Increased
91
Reduced
88
Closed
33
Calls
$15.8M
Puts
$11.1M
Net Calls
+$4.74M
Net Calls Change
-$2.91M

Top Buyers

Rank Fund Capital Flow
1
AllianceBernstein
AllianceBernstein
Tennessee
+$46.7M
2
DM
Deerfield Management
New York
+$36.3M
3
BBA
Baker Bros. Advisors
New York
+$32.6M
4
Fidelity Investments
Fidelity Investments
Massachusetts
+$28.7M
5
Arrowstreet Capital
Arrowstreet Capital
Massachusetts
+$27.3M

Top Sellers

Rank Fund Capital Flow
1
Federated Hermes
Federated Hermes
Pennsylvania
-$47.6M
2
Fiera Capital (Canada)
Fiera Capital (Canada)
Quebec, Canada
-$33.1M
3
FTM
First Turn Management
California
-$29.1M
4
Ensign Peak Advisors
Ensign Peak Advisors
Utah
-$19.4M
5
LGM
Logos Global Management
California
-$13.8M
Name Holding Trade Value Shares
Change 		Change in
Stake
Vanguard Portfolio Management
26
Vanguard Portfolio Management
Pennsylvania
$30.6M +$2.33M +76,019 +10%
Northern Trust
27
Northern Trust
Illinois
$30M +$2.14M +69,997 +10%
Charles Schwab
28
Charles Schwab
California
$28.1M +$1.2M +39,361 +6%
Pictet Asset Management
29
Pictet Asset Management
Switzerland
$26.6M -$98.9K -3,232 -0.5%
UBS Group
30
UBS Group
Switzerland
$24.5M -$3.24M -105,827 -14%
Nuveen
31
Nuveen
North Carolina
$23.9M +$5.88M +191,984 +43%
RG
32
Redmile Group
California
$23.9M +$3.65M +119,085 +23%
Vanguard Fiduciary Trust
33
Vanguard Fiduciary Trust
Pennsylvania
$23.1M +$1.82M +59,462 +11%
Qube Research & Technologies (QRT)
34
Qube Research & Technologies (QRT)
United Kingdom
$22.1M +$258K +8,440 +1%
Aberdeen Group
35
Aberdeen Group
United Kingdom
$20.9M +$468K +15,303 +3%
New York State Common Retirement Fund
36
New York State Common Retirement Fund
New York
$18.7M -$412K -13,455 -3%
DCM
37
DAFNA Capital Management
California
$18.5M +$628K +20,500 +4%
SCM
38
Sio Capital Management
New York
$17.9M +$14.7M +480,383 New
TCM
39
Tang Capital Management
California
$16.8M – – –
AAA
40
Affinity Asset Advisors
New York
$14.9M +$12.2M +400,000 New
Walleye Capital
41
Walleye Capital
New York
$14.4M +$11.8M +386,183 New
RI
42
RTW Investments
New York
$13.8M +$11.3M +370,370 New
RPAM
43
Rhenman & Partners Asset Management
Sweden
$12.8M +$2.7M +88,300 +35%
BC
44
BIT Capital
Germany
$11.6M +$9.53M +311,333 New
GAI
45
General American Investors
New York
$11.5M +$856K +27,979 +10%
First Trust Advisors
46
First Trust Advisors
Illinois
$11.4M +$7.96M +260,042 +557%
Citadel Advisors
47
Citadel Advisors
Florida
$11.2M -$11.6M -378,962 -56%
Wells Fargo
48
Wells Fargo
California
$11.1M +$1.67M +54,520 +22%
Balyasny Asset Management
49
Balyasny Asset Management
Illinois
$11.1M +$2.73M +89,220 +43%
Ensign Peak Advisors
50
Ensign Peak Advisors
Utah
$9.96M -$19.4M -632,322 -70%
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IDYA Hedge Fund Activity: Q2 2026 in Review

282 of the 8,279 institutional investors tracked by Wall St. Rank reported a position in IDEAYA Biosciences (IDYA) for Q2 2026, worth a combined $3.8B — up 20% from $3.16B a quarter earlier.

Buyers outnumbered sellers: 66 funds opened new IDYA positions and 33 closed out — a net gain of 33 holders — while 91 added to existing stakes and 88 trimmed.

The largest buyer was AllianceBernstein, adding an estimated $46.7M. The largest seller was Federated Hermes, cutting an estimated $47.6M.

  • 282 institutional investors held IDEAYA Biosciences (IDYA) as of Q2 2026, up from 253 in Q1 2026.
  • Funds reported $3.8B of IDEAYA Biosciences stock for Q2 2026, up 20% quarter-over-quarter.
  • 66 funds opened new IDEAYA Biosciences positions in Q2 2026 and 33 closed out, a net change of +33 holders.
  • The largest IDEAYA Biosciences buyer in Q2 2026 was AllianceBernstein, an estimated $46.7M added.
  • The largest IDEAYA Biosciences seller in Q2 2026 was Federated Hermes, an estimated $47.6M sold.

Based on aggregated 13F filings for Q2 2026.