Stock Ownership/SNDX

SYNDAX PHARMACEUTICALS INC (SNDX): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in SNDX · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
18
13F filers
Aggregate Value
$249.4M
Across holders
Last Price
$19.57
2026-08-24
Sector
Health Care
GICS
Quarterly fund activity9 increased7 reduced5 exited
Full exits: FARALLON CAPITAL MANAGEMENT LLC, Point72 Asset Management, L.P., Hudson Bay Capital Management LP, MARSHALL WACE, LLP, TUDOR INVESTMENT CORP ET AL
Institutional Holders of SNDX
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18 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund2.05M$44.9M18.0%0.0%Added+$40.5MQ2 2026
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
Hedge Fund1.58M$34.5M13.8%0.0%Reduced$-32KQ2 2026
ORBIMED ADVISORS LLC
CIK 0001055951
Hedge Fund1.54M$33.7M13.5%0.6%Added+$12.7MQ2 2026
Woodline Partners LP
CIK 0001784547
Hedge Fund1.25M$27.3M11.0%0.1%Unchanged+$0Q2 2026
SHAW D E & CO INC
CIK 0001009207
Hedge Fund1.24M$27.1M10.9%0.0%Reduced$-25.5MQ2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund853K$18.7M7.5%0.0%Reduced+$17.5MQ2 2026
Qube Research & Technologies Ltd
CIK 0001729829
Hedge Fund477K$10.4M4.2%0.0%Added+$9.6MQ2 2026
Squarepoint Ops LLC
CIK 0001642575
Hedge Fund370K$8.1M3.2%0.0%Added+$4.1MQ2 2026
JUPITER ASSET MANAGEMENT LTD
CIK 0001215838
Hedge Fund367K$8.0M3.2%0.0%Added—Q2 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
Hedge Fund322K$7.0M2.8%0.0%Reduced$-3.9MQ2 2026
MILLENNIUM MANAGEMENT LLCAdded
Hedge Fund
$44.9M· 18.0% of total· 0.0% port· 2.05M sh· +$40.5M QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPReduced
Hedge Fund
$34.5M· 13.8% of total· 0.0% port· 1.58M sh· $-32K QoQ· Q2 2026
ORBIMED ADVISORS LLCAdded
Hedge Fund
$33.7M· 13.5% of total· 0.6% port· 1.54M sh· +$12.7M QoQ· Q2 2026
Woodline Partners LPUnchanged
Hedge Fund
$27.3M· 11.0% of total· 0.1% port· 1.25M sh· +$0 QoQ· Q2 2026
SHAW D E & CO INCReduced
Hedge Fund
$27.1M· 10.9% of total· 0.0% port· 1.24M sh· $-25.5M QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCReduced
Hedge Fund
$18.7M· 7.5% of total· 0.0% port· 853K sh· +$17.5M QoQ· Q2 2026
Qube Research & Technologies LtdAdded
Hedge Fund
$10.4M· 4.2% of total· 0.0% port· 477K sh· +$9.6M QoQ· Q2 2026
Squarepoint Ops LLCAdded
Hedge Fund
$8.1M· 3.2% of total· 0.0% port· 370K sh· +$4.1M QoQ· Q2 2026
JUPITER ASSET MANAGEMENT LTDAdded
Hedge Fund
$8.0M· 3.2% of total· 0.0% port· 367K sh· — QoQ· Q2 2026
RENAISSANCE TECHNOLOGIES LLCReduced
Hedge Fund
$7.0M· 2.8% of total· 0.0% port· 322K sh· $-3.9M QoQ· Q2 2026
Brevan Howard Capital Management LPAdded
Hedge Fund
$6.8M· 2.7% of total· 0.1% port· 309K sh· +$2.3M QoQ· Q2 2026
Verition Fund Management LLCAdded
Hedge Fund
$6.7M· 2.7% of total· 0.0% port· 305K sh· — QoQ· Q2 2026
CITADEL ADVISORS LLCReduced
Hedge Fund
$5.6M· 2.3% of total· 0.0% port· 258K sh· +$4.2M QoQ· Q2 2026
Schonfeld Strategic Advisors LLCReduced
Hedge Fund
$5.2M· 2.1% of total· 0.0% port· 237K sh· $-523K QoQ· Q2 2026
Man Group plcAdded
Hedge Fund
$4.7M· 1.9% of total· 0.0% port· 214K sh· +$693K QoQ· Q2 2026
Magnetar Financial LLCAdded
Hedge Fund
$544K· 0.2% of total· 0.0% port· 25K sh· +$356K QoQ· Q2 2026
Walleye Capital LLCReduced
Hedge Fund
$123K· 0.0% of total· 0.0% port· 6K sh· $-133K QoQ· Q2 2026
Rockefeller Capital Management L.P.Unchanged
Hedge Fund
$70K· 0.0% of total· 0.0% port· 3K sh· $-12K QoQ· Q2 2026
1–10 of 18
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