PHAT · Phathom Pharmaceuticals, Inc. · Shareholders & Ownership

$5.74 -1.27 (-18.12%) At close · Oct 23

Russell 2000 member Rebalance outlook locked

Market Cap

$464.37M

80.90M

Volume · Oct 23 4.87M Avg daily vol (3M) 1.45M

Every disclosed holder of PHAT in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns PHAT

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

No chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	161	73,737,334	91.15%	Yes
Insiders (Forms 3, 4, 5)	14	8,742,403	10.81%	Yes
13D/G-only blocks	3	10,257,682	12.68%	Yes
Remaining	—	11,836,485	-14.63%	Negative
Registered funds (N-PORT, not summed)	160	18,786,948	23.22%	No

Shares outstanding: 80,900,934, the issuer's latest cover-page count restated onto today's split basis.

Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of PHAT

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	Frazier Life Sciences Management, L.P. 13F CIK 1892134 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	12,466,489	15.41%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
2	Medicxi Growth I LP 13G CIK 1690310 · Unknown · Jan 24, 2024 Rule 13d-1(c), passive investor	7,464,572	9.23%	—	Jan 24, 2024	Rule 13d-1(c), passive investor
3	Medicxi Ventures Management (Jersey) Ltd 13F CIK 1715579 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	7,464,572	9.23%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
4	Topper James N Insider CIK 1341382 · May 19, 2026 Director, 10% Owner, issuer-wide	5,957,449	7.36%	+24,122	May 19, 2026	Director, 10% Owner, issuer-wide
5	James N. Topper 13D CIK 1863769 · Unknown · Nov 1, 2025 not summed	5,323,356	6.58%	+1,088,365	Nov 1, 2025	not summed
6	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	4,525,129	5.59%	+463,133	Jun 30, 2026	carried, not yet filed for the newest quarter
6.1	BlackRock, Inc. 13G CIK 2012383 · Holding company · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	4,378,647	5.41%	+1,152,361	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
6.2	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	1,279,319	1.58%	+159,572	Jun 30, 2026	iShares Trust, not summed
6.3	iShares Biotechnology ETF Fund S000004350 · Registered fund · Jun 30, 2026 iShares Trust, not summed	401,413	0.50%	+44,468	Jun 30, 2026	iShares Trust, not summed
6.4	iShares Russell 2000 Value ETF Fund S000004342 · Registered fund · Jun 30, 2026 iShares Trust, not summed	332,716	0.41%	+43,381	Jun 30, 2026	iShares Trust, not summed
6.5	iShares Micro-Cap ETF Fund S000004439 · Registered fund · Jun 30, 2026 iShares Trust, not summed	165,278	0.20%	+48,419	Jun 30, 2026	iShares Trust, not summed
7	Invesco Ltd. 13F CIK 914208 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	4,029,731	4.98%	-292,329	Jun 30, 2026	carried, not yet filed for the newest quarter
7.1	Invesco Global Fund Fund S000064624 · Registered fund · Jul 31, 2026 AIM International Mutual Funds (Invesco International Mutual Funds), not summed	2,342,451	2.90%	0	Jul 31, 2026	AIM International Mutual Funds (Invesco International Mutual Funds), not summed
7.2	Invesco V.I. Global Fund Fund S000064660 · Registered fund · Jun 30, 2026 AIM Variable Insurance Funds (Invesco Variable Insurance Funds), not summed	356,195	0.44%	+10,545	Jun 30, 2026	AIM Variable Insurance Funds (Invesco Variable Insurance Funds), not summed
7.3	Invesco Health Care Fund Fund S000000235 · Registered fund · Jul 31, 2026 AIM Investment Funds (Invesco Investment Funds), not summed	184,910	0.23%	0	Jul 31, 2026	AIM Investment Funds (Invesco Investment Funds), not summed
7.4	Invesco V.I. Health Care Fund Fund S000000193 · Registered fund · Jun 30, 2026 AIM Variable Insurance Funds (Invesco Variable Insurance Funds), not summed	24,059	0.03%	0	Jun 30, 2026	AIM Variable Insurance Funds (Invesco Variable Insurance Funds), not summed
7.5	Invesco Nasdaq Biotechnology ETF Fund S000072469 · Registered fund · May 31, 2026 Invesco Exchange-Traded Fund Trust II, not summed	4,246	0.01%	+279	May 31, 2026	Invesco Exchange-Traded Fund Trust II, not summed
8	Carlyle Group Inc. 13F CIK 1527166 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,496,808	4.32%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
9	MILLENNIUM MANAGEMENT LLC 13F CIK 1273087 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,375,834	4.17%	-647,075	Jun 30, 2026	carried, not yet filed for the newest quarter
9.1	MILLENNIUM MANAGEMENT LLC 13G CIK 1273087 · Registered investment adviser · Jun 30, 2026 Rule 13d-1(c), passive investor, not summed	3,375,834	4.17%	-802,577	Jun 30, 2026	Rule 13d-1(c), passive investor, not summed
10	WASATCH ADVISORS LP 13F CIK 814133 · Registered investment adviser · Sep 30, 2026	2,942,432	3.64%	+1,635,185	Sep 30, 2026
10.1	Wasatch Micro Cap Fund Fund S000000885 · Registered fund · Jun 30, 2026 WASATCH FUNDS TRUST, not summed	806,558	1.00%	0	Jun 30, 2026	WASATCH FUNDS TRUST, not summed
10.2	Wasatch Ultra Growth Fund Fund S000000879 · Registered fund · Jun 30, 2026 WASATCH FUNDS TRUST, not summed	461,876	0.57%	-32,843	Jun 30, 2026	WASATCH FUNDS TRUST, not summed
10.3	Wasatch Long/Short Alpha Fund Fund S000073482 · Registered fund · Jun 30, 2026 WASATCH FUNDS TRUST, not summed	19,882	0.02%	0	Jun 30, 2026	WASATCH FUNDS TRUST, not summed
11	TAKEDA PHARMACEUTICAL CO LTD 13D CIK 1395064 · Unknown · Apr 9, 2024	2,790,480	3.45%	-362,737	Apr 9, 2024
12	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,656,944	3.28%	+73,308	Jun 30, 2026	carried, not yet filed for the newest quarter
13	GW&K Investment Management, LLC 13F CIK 1082917 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,166,838	2.68%	+745,729	Jun 30, 2026	carried, not yet filed for the newest quarter
14	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	2,007,668	2.48%	+46,070	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
15	FRANKLIN RESOURCES INC 13F CIK 38777 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,970,828	2.44%	+976,324	Jun 30, 2026	carried, not yet filed for the newest quarter
15.1	Franklin Small Cap Growth Fund Fund S000006889 · Registered fund · Jul 31, 2026 Franklin Strategic Series, not summed	827,068	1.02%	+261,170	Jul 31, 2026	Franklin Strategic Series, not summed
15.2	Franklin Biotechnology Discovery Fund Fund S000006882 · Registered fund · Jul 31, 2026 Franklin Strategic Series, not summed	507,425	0.63%	+20,413	Jul 31, 2026	Franklin Strategic Series, not summed
16	NEA Management Company, LLC 13F CIK 1512848 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,960,169	2.42%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
17	683 Capital Management, LLC 13F CIK 1404574 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,850,000	2.29%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
18	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,778,032	2.20%	+1,151,836	Jun 30, 2026	carried, not yet filed for the newest quarter
18.1	Goldman Sachs Small Cap Value Insights Fund Fund S000014929 · Registered fund · Jul 31, 2026 Goldman Sachs Trust, not summed	51,303	0.06%	0	Jul 31, 2026	Goldman Sachs Trust, not summed
18.2	Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF Fund S000048296 · Registered fund · May 31, 2026 Goldman Sachs ETF Trust, not summed	49,552	0.06%	+28,693	May 31, 2026	Goldman Sachs ETF Trust, not summed
18.3	Goldman Sachs Absolute Return Tracker Fund Fund S000020314 · Registered fund · Aug 31, 2026 GOLDMAN SACHS TRUST, not summed	40,178	0.05%	+10,438	Aug 31, 2026	GOLDMAN SACHS TRUST, not summed
18.4	Goldman Sachs Small Cap Equity Insights Fund Fund S000009329 · Registered fund · Jul 31, 2026 Goldman Sachs Trust, not summed	23,152	0.03%	0	Jul 31, 2026	Goldman Sachs Trust, not summed
18.5	Goldman Sachs Variable Insurance Trust Small Cap Equity Insights Fund Fund S000009355 · Registered fund · Jun 30, 2026 Goldman Sachs Variable Insurance Trust, not summed	9,806	0.01%	—	Jun 30, 2026	Goldman Sachs Variable Insurance Trust, not summed
19	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	1,586,323	1.96%	+199,433	Jun 30, 2026	carried, not yet filed for the newest quarter
19.1	State Street(R) SPDR(R) S&P(R) Pharmaceuticals ETF Fund S000012321 · Registered fund · Jun 30, 2026 SPDR SERIES TRUST, not summed	419,786	0.52%	+20,885	Jun 30, 2026	SPDR SERIES TRUST, not summed
19.2	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	15,778	0.02%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
19.3	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	1,241	0.00%	+352	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
19.4	State Street Balanced Index Fund Fund S000082802 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	320	0.00%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
20	Catalys Pacific, LLC 13F CIK 2011385 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,493,854	1.85%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
21	NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 13F CIK 921739 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,462,738	1.81%	+257,369	Jun 30, 2026	carried, not yet filed for the newest quarter
21.1	Nomura Small Cap Growth Fund Fund S000006286 · Registered fund · Jun 30, 2026 IVY FUNDS, not summed	988,514	1.22%	+169,190	Jun 30, 2026	IVY FUNDS, not summed
21.2	Nomura VIP Small Cap Growth Series Fund S000006233 · Registered fund · Jun 30, 2026 Ivy Variable Insurance Portfolios, not summed	192,366	0.24%	+36,843	Jun 30, 2026	Ivy Variable Insurance Portfolios, not summed
22	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,315,687	1.63%	-12,358	Jun 30, 2026	carried, not yet filed for the newest quarter
23	Nabulsi Azmi Insider CIK 1791412 · Feb 27, 2025 Chief Operating Officer, issuer-wide	1,101,868	1.36%	+79,200	Feb 27, 2025	Chief Operating Officer, issuer-wide
24	Ensign Peak Advisors, Inc 13F CIK 1454984 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,051,913	1.30%	-575,893	Jun 30, 2026	carried, not yet filed for the newest quarter
25	Propel Bio Management, LLC 13F CIK 1969764 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,050,358	1.30%	+209,086	Jun 30, 2026	carried, not yet filed for the newest quarter
26	Point72 Asset Management, L.P. 13F CIK 1603466 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,022,193	1.26%	+1,022,193	Jun 30, 2026	carried, not yet filed for the newest quarter
27	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	796,631	0.98%	+130,602	Jun 30, 2026	carried, not yet filed for the newest quarter
28	SummitTX Capital, L.P. 13F CIK 2052310 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	789,550	0.98%	-206,335	Jun 30, 2026	carried, not yet filed for the newest quarter
29	HSBC HOLDINGS PLC 13F CIK 873630 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	709,695	0.88%	+709,695	Jun 30, 2026	carried, not yet filed for the newest quarter
30	MARSHALL WACE, LLP 13F CIK 1318757 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	666,090	0.82%	-194,602	Jun 30, 2026	carried, not yet filed for the newest quarter
31	EcoR1 Capital, LLC 13F CIK 1587114 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	625,000	0.77%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
32	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	586,632	0.73%	+27,760	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
33	PERCEPTIVE ADVISORS LLC 13F CIK 1224962 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	532,000	0.66%	-393,000	Jun 30, 2026	carried, not yet filed for the newest quarter
34	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	519,076	0.64%	+36,940	Jun 30, 2026	carried, not yet filed for the newest quarter
35	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	458,301	0.57%	+43,345	Jun 30, 2026	carried, not yet filed for the newest quarter
35.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	24,543	0.03%	+2,652	Jun 30, 2026	Northern Funds, not summed
35.2	Small Cap Core Fund Fund S000001244 · Registered fund · Jun 30, 2026 Northern Funds, not summed	6,048	0.01%	-292	Jun 30, 2026	Northern Funds, not summed
36	StepStone Group LP 13F CIK 1502287 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	422,085	0.52%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
37	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	419,094	0.52%	+10,079	Jun 30, 2026	carried, not yet filed for the newest quarter
37.1	Schwab U.S. Small-Cap ETF Fund S000026636 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	236,650	0.29%	+15,738	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
37.2	Schwab Small-Cap Index Fund Fund S000005912 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	119,413	0.15%	+17,517	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
37.3	Schwab U.S. Broad Market ETF Fund S000026631 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	33,490	0.04%	+479	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
37.4	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	32,962	0.04%	0	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
38	Hennion & Walsh Asset Management, Inc. 13F CIK 1861642 · Investment adviser · Sep 30, 2026	392,392	0.49%	+65,114	Sep 30, 2026
39	Basta Steven L Insider CIK 1417397 · Feb 10, 2026 Director, issuer-wide	373,315	0.46%	+8,495	Feb 10, 2026	Director, issuer-wide
40	Woodline Partners LP 13F CIK 1784547 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	369,052	0.46%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
41	Curran Terrie Insider CIK 1690298 · Jan 21, 2025 Director, President and Chief Executive, issuer-wide	364,305	0.45%	-17,269	Jan 21, 2025	Director, President and Chief Executive, issuer-wide
42	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	354,573	0.44%	+15,860	Jun 30, 2026	carried, not yet filed for the newest quarter
43	JNL/Invesco Global Growth Fund Fund S000001734 · Registered fund · Mar 31, 2026 JNL Series Trust, not summed	337,376	0.42%	—	Mar 31, 2026	JNL Series Trust, not summed
44	AMERIPRISE FINANCIAL INC 13F CIK 820027 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	293,979	0.36%	+39,760	Jun 30, 2026	carried, not yet filed for the newest quarter
45	Invesco Global Equity Portfolio Fund S000021940 · Registered fund · Jun 30, 2026 Brighthouse Funds Trust I, not summed	276,416	0.34%	-6,768	Jun 30, 2026	Brighthouse Funds Trust I, not summed
46	JPMORGAN CHASE & CO 13F CIK 19617 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	275,251	0.34%	-12,179	Jun 30, 2026	carried, not yet filed for the newest quarter
47	AMG GW&K Small Cap Growth Fund Fund S000001114 · Registered fund · Jul 31, 2026 AMG Funds IV, not summed	260,177	0.32%	+44,420	Jul 31, 2026	AMG Funds IV, not summed
48	Simplify Asset Management Inc. 13F CIK 1846368 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	249,267	0.31%	-13,119	Jun 30, 2026	carried, not yet filed for the newest quarter
48.1	Simplify Propel Opportunities ETF Fund S000078061 · Registered fund · Jun 30, 2026 Simplify Exchange Traded Funds, not summed	249,267	0.31%	-13,119	Jun 30, 2026	Simplify Exchange Traded Funds, not summed
49	VANGUARD RUSSELL 2000 INDEX FUND Fund S000030003 · Registered fund · May 31, 2026 VANGUARD SCOTTSDALE FUNDS, not summed	238,476	0.29%	+41,612	May 31, 2026	VANGUARD SCOTTSDALE FUNDS, not summed
50	RENAISSANCE TECHNOLOGIES LLC 13F CIK 1037389 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	226,400	0.28%	-79,400	Jun 30, 2026	carried, not yet filed for the newest quarter

12 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 260 holders

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Key facts CIK 1783183 CUSIP 71722W107 13F (30d) 16 filings 16 filers Visit website Investor relations