Stock Ownership/PHAT

PHATHOM PHARMACEUTICALS INC (PHAT): Ownership & Insider Activity

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

Reported Holders
15
13F filers
Aggregate Value
$73.5M
Across holders
Last Price
$8.66
2026-08-24
Sector
Health Care
GICS
Quarterly fund activity6 increased8 reduced3 exited
Full exits: BALYASNY ASSET MANAGEMENT LLC, Schonfeld Strategic Advisors LLC, TUDOR INVESTMENT CORP ET AL
Institutional Holders of PHAT
↗
15 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund3.38M$36.6M49.8%0.0%Reduced$-7.0MQ2 2026
Point72 Asset Management, L.P.
CIK 0001603466
Hedge Fund1.02M$11.1M15.1%0.0%Added—Q2 2026
MARSHALL WACE, LLP
CIK 0001318757
Hedge Fund666K$7.2M9.8%0.0%Reduced$-8.7MQ2 2026
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
Hedge Fund519K$5.6M7.7%0.0%Added+$401KQ2 2026
Woodline Partners LP
CIK 0001784547
Hedge Fund369K$4.0M5.4%0.0%Unchanged+$0Q2 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
Hedge Fund226K$2.5M3.3%0.0%Reduced$-861KQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund185K$2.0M2.7%0.0%Reduced+$1.8MQ2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund135K$1.5M2.0%0.0%Added+$1.5MQ2 2026
SHAW D E & CO INC
CIK 0001009207
Hedge Fund96K$1.0M1.4%0.0%Reduced$-272KQ2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
Hedge Fund77K$839K1.1%0.0%Added—Q2 2026
MILLENNIUM MANAGEMENT LLCReduced
Hedge Fund
$36.6M· 49.8% of total· 0.0% port· 3.38M sh· $-7.0M QoQ· Q2 2026
Point72 Asset Management, L.P.Added
Hedge Fund
$11.1M· 15.1% of total· 0.0% port· 1.02M sh· — QoQ· Q2 2026
MARSHALL WACE, LLPReduced
Hedge Fund
$7.2M· 9.8% of total· 0.0% port· 666K sh· $-8.7M QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPAdded
Hedge Fund
$5.6M· 7.7% of total· 0.0% port· 519K sh· +$401K QoQ· Q2 2026
Woodline Partners LPUnchanged
Hedge Fund
$4.0M· 5.4% of total· 0.0% port· 369K sh· +$0 QoQ· Q2 2026
RENAISSANCE TECHNOLOGIES LLCReduced
Hedge Fund
$2.5M· 3.3% of total· 0.0% port· 226K sh· $-861K QoQ· Q2 2026
CITADEL ADVISORS LLCReduced
Hedge Fund
$2.0M· 2.7% of total· 0.0% port· 185K sh· +$1.8M QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCAdded
Hedge Fund
$1.5M· 2.0% of total· 0.0% port· 135K sh· +$1.5M QoQ· Q2 2026
SHAW D E & CO INCReduced
Hedge Fund
$1.0M· 1.4% of total· 0.0% port· 96K sh· $-272K QoQ· Q2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPAdded
Hedge Fund
$839K· 1.1% of total· 0.0% port· 77K sh· — QoQ· Q2 2026
Man Group plcAdded
Hedge Fund
$528K· 0.7% of total· 0.0% port· 49K sh· +$199K QoQ· Q2 2026
Squarepoint Ops LLCReduced
Hedge Fund
$343K· 0.5% of total· 0.0% port· 32K sh· $-2.6M QoQ· Q2 2026
Brevan Howard Capital Management LPReduced
Hedge Fund
$158K· 0.2% of total· 0.0% port· 15K sh· $-508K QoQ· Q2 2026
Fulcrum Asset Management LLPAdded
Hedge Fund
$48K· 0.1% of total· 0.0% port· 4K sh· — QoQ· Q2 2026
Rockefeller Capital Management L.P.Reduced
Hedge Fund
$29K· 0.0% of total· 0.0% port· 3K sh· $-80K QoQ· Q2 2026
1–10 of 15
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