Phathom Pharmaceuticals, Inc.

PHAT

Exchange: Nasdaq
Industry: Pharmaceutical Preparations
SEC CIK: 0001783183

SEC filings (opens in a new tab)

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 2023 vs. Q3 2023

How the institutions holding Phathom Pharmaceuticals, Inc. changed between Q3 2023 and Q4 2023.

All holders in Q4 2023 All holders in Q3 2023

13F holders of PHAT: Q3 2023 compared with Q4 2023
Measure	Q3 2023	Of which not filed for Q4 2023	Q4 2023	Change
Holders	110	1	117	+8
Shares	43.8M	850.0K	54.1M	+11.2M (+26.1%)
Value	$452.7M	$8.81M	$503.3M	+$59.4M (+13.4%)

1 institution that held it in Q3 2023 haven't filed for Q4 2023 yet. Not filing isn't selling, so the changes leave them out.

New holders (25)

Institutions that held Phathom Pharmaceuticals, Inc. at the end of Q4 2023 but not at the end of Q3 2023.

Institutions new to PHAT in Q4 2023
Institution	Shares	Value	% of portfolio
Takeda Pharmaceutical Co Ltd	7,459,286	$77.4M	23.62%
Decheng Capital LLC	850,000	$7.76M	2.17%
Catalys Pacific, LLC	721,962	$6.59M	6.18%
Propel Bio Management, LLC	443,047	$4.05M	3.35%
Checkpoint Capital L.P.	359,446	$3.28M	2.29%
Saturn V Capital Management LLC	160,075	$1.46M	0.56%
Renaissance Technologies LLC	65,600	$599.0K	0.00%
Susquehanna International Group, LLP	52,313	$477.6K	0.00%
Octagon Capital Advisors LP	50,000	$456.5K	0.07%
Fulton Breakefield Broenniman LLC	23,579	$215.3K	0.02%
Two Sigma Advisers, LP	22,700	$207.3K	0.00%
Graham Capital Management, L.P.	20,619	$188.3K	0.01%
Tocqueville Asset Management L.P.	18,100	$165.3K	0.00%
Dynamic Technology Lab Private Ltd	15,000	$137.0K	0.01%
Landscape Capital Management, L.L.C.	14,940	$136.4K	0.01%
Entropy Technologies, LP	14,590	$133.2K	0.02%
UBS Asset Management Americas Inc	12,893	$117.7K	0.00%
Davenport & Co LLC	10,000	$91.3K	0.00%
Quest Partners LLC	2,205	$20.1K	0.00%
Group One Trading, L.P.	1,545	$14.1K	0.00%
ICA Group Wealth Management, LLC	1,300	$11.9K	0.00%
BFSG, LLC	300	$2.74K	0.00%
Bear Mountain Capital, Inc.	200	$1.50K	0.00%
Farther Finance Advisors, LLC	19	$173	0.00%
GAMMA Investing LLC	7	$47	0.00%

Sold out (17)

Institutions that held Phathom Pharmaceuticals, Inc. at the end of Q3 2023 and filed for Q4 2023 without it.

Institutions that sold out of PHAT in Q4 2023
Institution	Shares, Q3 2023	Value, Q3 2023
Altium Capital Management LP	220,000	$2.28M
AlphaCentric Advisors LLC	160,000	$1.66M
Gsa Capital Partners LLP	121,892	$1.26M
Federated Hermes, Inc.	82,148	$851.9K
Trexquant Investment LP	58,825	$610.0K
Hennion & Walsh Asset Management, Inc.	48,987	$508.0K
Squarepoint Ops LLC	18,815	$195.1K
ExodusPoint Capital Management, LP	17,008	$176.0K
XTX Topco Ltd	14,847	$154.0K
Engineers Gate Manager LP	12,888	$133.6K
Centiva Capital, LP	10,962	$113.7K
Simplex Trading, LLC	2,120	$21.0K
Headinvest, LLC	882	$8.95K
Lindbrook Capital, LLC	132	$1.37K
US Bancorp	113	$1.17K
Newbridge Financial Services Group, Inc.	35	$363
Cutler Group LP	50	$0

Not filed for Q4 2023 yet (1)

Institutions that held Phathom Pharmaceuticals, Inc. at the end of Q3 2023 and haven't filed a 13F for Q4 2023. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding PHAT in Q3 2023 that haven't filed for Q4 2023
Institution	Shares, Q3 2023	Value, Q3 2023
Decheng Capital Management III (Cayman), LLC	850,000	$8.81M