$PHAT

$5.94 +$0.20 (3.48%) Close

$PHAT Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 80.9M shares outstanding

Who owns PHAT?

By type of holder

Institutions 89.1% Insiders 10.9% Everyone else 0.0%

Concentration Top 10 holders own 80.7%

Frazier Life Sciences Management, L.P. 15.4% · Medicxi Ventures Management (Jersey) Ltd 9.2%

Institutional ownership

89.1%

+3.6 pts vs last qtr

Institutional holders

160

-14 vs last qtr

Net shares bought

+2.9M

by institutions in Q2 2026

New / sold out

21 / 35

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Goldman Sachs Group Inc +1.2M
Point72 Asset Management, L.P. NEW +1.0M

Biggest sellers in Q2 2026

Millennium Management LLC −647.1K
Ensign Peak Advisors, Inc −575.9K

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Phathom Pharmaceuticals, Inc. in the last 12 months.

Is your stake being diluted?

Diluted share count, FY2021–FY2025

+97.1%

+18.48% a year

Each share's claim on the business

−49.3%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $139M

over 5 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years39% 3–5 years33% 1–3 years12% Under 1 year17%

Quarterly turnover

9.8%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting PHAT on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
FL Frazier Life Sciences Management, L.P.	12.5M	15.41%	Unchanged	2022	3.0%
Shares held by quarter Peak holding12.5M (Q2'25) Change over 8 quarters+2.4M Share of the company15.410% Frazier Life Sciences Management, L.P.'s full portfolio →
MV Medicxi Ventures Management (Jersey) Ltd	7.5M	9.23%	Unchanged	≤2021	45.7%
Shares held by quarter Peak holding7.5M (Q3'24) Change over 8 quarters0 Share of the company9.230% Medicxi Ventures Management (Jersey) Ltd's full portfolio →

Frazier Life Sciences Management, L.P.

12.5M

% of company

15.41%

Change vs last qtr

Unchanged

Held since

2022

Medicxi Ventures Management (Jersey) Ltd

7.5M

% of company

9.23%

Change vs last qtr

Unchanged

Held since

≤2021

28 more super investors behind a free account

See every manager holding Phathom Pharmaceuticals, Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting PHAT on Form N-PORT; together they hold 24.0% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$21.8M	2.0M	2.48%	0.00%	June 30, 2026
IG Invesco Global Fund AIM International Mutual Funds (Invesco International Mutual Funds)	$20.5M	2.3M	2.90%	0.23%	July 31, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$21.8M

% of company

2.48%

% of the fund

0.00%

As of

June 30, 2026

Invesco Global Fund

AIM International Mutual Funds (Invesco International Mutual Funds)

Position value

$20.5M

% of company

2.90%

% of the fund

0.23%

As of

July 31, 2026

23 more funds behind a free account

See every fund holding Phathom Pharmaceuticals, Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
JN James N. Topper 5%+ holder 13D · 8.6%	6.0M	7.40%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company7.400% Disclosed stake13D · 8.6% View the 13D/G filing →
PJ Patrick J. Heron 5%+ holder 13D · 8.4%	5.9M	7.30%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company7.300% Disclosed stake13D · 8.4% View the 13D/G filing →

James N. Topper

5%+ holder13D · 8.6%

6.0M

% of company

7.40%

Change vs last qtr

—

Held since

—

Patrick J. Heron

5%+ holder13D · 8.4%

5.9M

% of company

7.30%

Change vs last qtr

—

Held since

—

28 more holders behind a free account

See every insider and 5%+ holder of Phathom Pharmaceuticals, Inc..

Comments