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Phathom Pharmaceuticals, Inc.

PHAT
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0001783183

No open-market purchases or sales by Phathom Pharmaceuticals, Inc. insiders were filed in the last 90 days; 161 institutions reported holding it in 13F filings for Q2 2026, worth $782.1M in total; no superinvestor holds it.

Q4 2025 vs. Q3 2025

How the institutions holding Phathom Pharmaceuticals, Inc. changed between Q3 2025 and Q4 2025.

All holders in Q4 2025All holders in Q3 2025

13F holders of PHAT: Q3 2025 compared with Q4 2025
MeasureQ3 2025Q4 2025Change
Holders133173+40
Shares62.3M62.0M−370.1K (−0.6%)
Value$733.6M$1.03B+$291.9M (+39.8%)

New holders (50)

Institutions that held Phathom Pharmaceuticals, Inc. at the end of Q4 2025 but not at the end of Q3 2025.

Institutions new to PHAT in Q4 2025
InstitutionSharesValue% of portfolio
Divisadero Street Capital Management, LP662,312$11.0M0.63%
Next Century Growth Investors LLC393,774$6.53M0.45%
D. E. Shaw & Co., Inc.261,068$4.33M0.00%
Hussman Strategic Advisors, Inc.147,000$2.44M0.59%
Campbell & CO Investment Adviser LLC115,284$1.91M0.09%
Hennion & Walsh Asset Management, Inc.114,981$1.91M0.07%
VARCOV Co.86,759$1.44M0.57%
Swiss National Bank84,000$1.39M0.00%
Dark Forest Capital Management LP62,248$1.03M0.05%
Two Sigma Investments, LP57,783$958.6K0.00%
Stratos Wealth Partners, LTD.50,300$834.5K0.01%
Engineers Gate Manager LP44,258$734.2K0.01%
Southeast Asset Advisors Inc.42,874$711.3K0.07%
Schonfeld Strategic Advisors LLC30,944$513.4K0.00%
UBS Asset Management Americas Inc30,631$508.2K0.00%
Y-Intercept (Hong Kong) Ltd30,488$505.8K0.01%
Los Angeles Capital Management LLC33,425$444.9K0.00%
Acadian Asset Management LLC22,185$367.0K0.00%
Jain Global LLC21,737$360.6K0.00%
Janus Henderson Group PLC21,500$356.6K0.00%
Fox Run Management, L.L.C.20,487$339.9K0.05%
Zurcher Kantonalbank (Zurich Cantonalbank)19,890$330.0K0.00%
Jump Financial, LLC17,408$288.8K0.00%
Bridgefront Capital, LLC16,981$281.7K0.07%
SG Americas Securities, LLC16,497$274.0K0.00%
Virtu Financial LLC15,540$258.0K0.01%
State of Wisconsin Investment Board15,285$253.6K0.00%
Baader Bank INC15,000$248.8K0.02%
KLP Kapitalforvaltning AS14,000$232.3K0.00%
Rafferty Asset Management, LLC13,855$229.9K0.00%
Persistent Asset Partners Ltd12,916$214.3K0.10%
Scientech Research LLC12,879$213.7K0.13%
Graham Capital Management, L.P.12,867$213.5K0.01%
Arizona State Retirement System11,867$196.9K0.00%
Entropy Technologies, LP11,000$182.5K0.01%
9823 Capital, L.P.10,429$173.0K0.12%
ProShare Advisors LLC10,377$172.2K0.00%
Great West Life Assurance Co6,818$113.0K0.00%
RiverPark Advisors, LLC2,807$46.6K0.01%
Kestra Advisory Services, LLC2,275$37.7K0.00%
Strategic Wealth Advisors LLC1,000$16.0K0.01%
BNP PARIBAS ASSET MANAGEMENT Holding S.A.604$10.0K0.00%
Federated Hermes, Inc.549$9.11K0.00%
MCF Advisors LLC446$7.40K0.00%
Rockefeller Capital Management L.P.155$2.57K0.00%
Signaturefd, LLC40$6640.00%
Caitong International Asset Management Co., Ltd28$4650.00%
Rachor Investment Advisory Services, LLC25$4150.00%
Essential Partners LLC6$1000.00%
IFP Advisors, Inc1$170.00%

Sold out (10)

Institutions that held Phathom Pharmaceuticals, Inc. at the end of Q3 2025 and filed for Q4 2025 without it.

Institutions that sold out of PHAT in Q4 2025
InstitutionShares, Q3 2025Value, Q3 2025
AIGH Capital Management LLC429,000$5.05M
Walleye Capital LLC290,467$3.42M
PharVision Advisers, LLC30,968$364.5K
Quadrature Capital Ltd30,272$356.0K
Omers Administration Corp16,500$194.2K
Kestra Private Wealth Services, LLC15,500$182.4K
Quarry LP7,007$82.5K
Leonteq Securities AG4,800$56.5K
Bear Mountain Capital, Inc.1,000$14.0K
SBI Securities Co., Ltd.23$271