Phathom Pharmaceuticals, Inc. (PHAT) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

73,396,435Shares Outstanding

58,433,614Shares held by institutions

$736,847,873Value of institutional holdings

79.61%Institutional ownership %

0.29%Shares Changed QoQ

168No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Phathom Pharmaceuticals, Inc. (NASDAQ:PHAT) appears in 168 institutional 13F filings for the quarter ending December 2025.

These investors held 79.1% of outstanding shares in December 2025, down from 85.4% in September 2025.
Their total shares held in PHAT decreased -0.07% from the prior quarter, while the number of investors in Phathom Pharmaceuticals increased 17.48% year over year.
Activity in PHAT broke down as 96 buyers, 50 sellers, and 22 unchanged among 168 total holders.
Institutional investors collectively held 58.04Mn shares in Phathom Pharmaceuticals as of December 2025, down by 37.92K shares quarter on quarter, and down 10.65Mn shares year over year.
Frazier Life Sciences Management, L.P. is the top holder of Phathom Pharmaceuticals as of December 31, 2025, with 12.47Mn shares representing 16.99% of outstanding stock.
Top purchasers of PHAT stock for the quarter ending December 2025 included Divisadero Street Capital Management, LP (662.31K), Goldman Sachs Group Inc (632.06K), SUSQUEHANNA INTERNATIONAL GROUP, LLP (394.89K), NEXT CENTURY GROWTH INVESTORS LLC (393.77K), JANE STREET GROUP, LLC (277.51K).
The largest sales of PHAT for the quarter ending December 2025 came from MILLENNIUM MANAGEMENT LLC (3.0Mn), Catalio Capital Management, LP (429.52K), Ameriprise Financial Inc (368.85K), Bank Of America Corp /De/ (239.19K), Barclays Plc (229.66K).
Per Business Quant data, the top 10 holders of Phathom Pharmaceuticals for the quarter ending December 2025 are Frazier Life Sciences Management, L.P. (12.47Mn), Medicxi Ventures Management (Jersey) Ltd (7.46Mn), Invesco Ltd. (3.92Mn), BlackRock, Inc. (3.56Mn), Carlyle Group Inc. (3.5Mn), VANGUARD GROUP INC (3.18Mn), MILLENNIUM MANAGEMENT LLC (2.08Mn), NEA Management Company, LLC (1.96Mn), 683 Capital Management, LLC (1.78Mn), WASATCH ADVISORS LP (1.33Mn).

168 Institutional Holders

58,433,614 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
Frazier Life Sciences Management, L.P.	31 Dec, 2025	12,466,489	0	0.00%	$206,819,053.00
Medicxi Ventures Management (Jersey) Ltd	31 Dec, 2025	7,464,572	0	0.00%	$123,837,249.00
Invesco Ltd.	31 Dec, 2025	3,920,446	55,475	1.44%	$65,040,200.00
BlackRock, Inc.	31 Dec, 2025	3,555,548	153,224	4.50%	$58,986,540.00
Carlyle Group Inc.	31 Dec, 2025	3,496,808	0	0.00%	$57,977,077.00
VANGUARD GROUP INC	31 Dec, 2025	3,177,211	-38,361	-1.19%	$52,709,931.00
MILLENNIUM MANAGEMENT LLC	31 Dec, 2025	2,082,180	-2,999,271	-59.02%	$34,543,366.00
NEA Management Company, LLC	31 Dec, 2025	1,960,169	0	0.00%	$32,519,204.00
683 Capital Management, LLC	31 Dec, 2025	1,785,000	-35,380	-1.94%	$29,613,150.00
WASATCH ADVISORS LP	31 Dec, 2025	1,331,669	-205,549	-13.37%	$22,092,389.00
GW&K Investment Management, LLC	31 Dec, 2025	1,306,678	162,348	14.19%	$21,678.00
State Street Corp	31 Dec, 2025	1,149,536	95,945	9.11%	$19,070,802.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	1,073,434	-15,476	-1.42%	$17,811,321.00
Goldman Sachs Group Inc	31 Dec, 2025	784,090	632,058	415.74%	$13,008,052.00
Propel Bio Management, LLC	31 Dec, 2025	740,918	187,991	34.00%	$12,291,830.00
Catalio Capital Management, LP	31 Dec, 2025	698,996	-429,525	-38.06%	$11,596,344.00
Divisadero Street Capital Management, LP	31 Dec, 2025	662,312	662,312	0.00%	$10,987,756.00
MOORE CAPITAL MANAGEMENT, LP	31 Dec, 2025	600,000	0	0.00%	$9,954,000.00
SUSQUEHANNA INTERNATIONAL GROUP, LLP	31 Dec, 2025	549,171	394,894	255.96%	$9,110,747.00
SummitTX Capital, L.P.	31 Dec, 2025	517,820	131,852	34.16%	$8,590,634.00

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