JANX · Janux Therapeutics, Inc. · Shareholders & Ownership

$17.20 +0.46 (+2.75%)

Russell 2000 member Rebalance outlook locked

Market Cap

$1.02B

61.14M

Volume · Oct 20 862.06K Avg daily vol (3M) 845.82K

Every disclosed holder of JANX 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 JANX

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)	197	60,700,535	99.29%	Yes
Insiders (Forms 3, 4, 5)	17	1,113,429	1.82%	Yes
13D/G-only blocks	4	10,591,730	17.32%	Yes
Remaining	—	11,268,921	-18.43%	Negative
Registered funds (N-PORT, not summed)	195	15,901,182	26.01%	No

Shares outstanding: 61,136,773, 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 JANX

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	RA CAPITAL MANAGEMENT, L.P. 13F CIK 1346824 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	11,189,693	18.30%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
1.1	RA CAPITAL MANAGEMENT, L.P. Insider CIK 1346824 · Jun 11, 2026 Director, issuer-wide, not summed	1,048,406	1.71%	—	Jun 11, 2026	Director, issuer-wide, not summed
2	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	6,134,667	10.03%	+701,434	Jun 30, 2026	carried, not yet filed for the newest quarter
2.1	BlackRock, Inc. 13G CIK 2012383 · Holding company · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	4,098,457	6.70%	+752,793	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
2.2	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	1,127,776	1.84%	+75,237	Jun 30, 2026	iShares Trust, not summed
2.3	iShares Russell 2000 Value ETF Fund S000004342 · Registered fund · Jun 30, 2026 iShares Trust, not summed	405,417	0.66%	+159,279	Jun 30, 2026	iShares Trust, not summed
2.4	iShares Biotechnology ETF Fund S000004350 · Registered fund · Jun 30, 2026 iShares Trust, not summed	403,672	0.66%	+11,323	Jun 30, 2026	iShares Trust, not summed
2.5	BlackRock Advantage Small Cap Core Fund Fund S000039982 · Registered fund · May 29, 2026 BlackRock Funds, not summed	380,620	0.62%	+119,041	May 29, 2026	BlackRock Funds, not summed
3	Prosight Management, LP 13F CIK 1617201 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	3,804,481	6.22%	+254,481	Jun 30, 2026	carried, not yet filed for the newest quarter
4	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	3,004,899	4.92%	+540,882	Jun 30, 2026	carried, not yet filed for the newest quarter
4.1	State Street(R) SPDR(R) S&P(R) Biotech ETF Fund S000010018 · Registered fund · Jun 30, 2026 SPDR SERIES TRUST, not summed	1,928,491	3.15%	+503,951	Jun 30, 2026	SPDR SERIES TRUST, not summed
4.2	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	14,900	0.02%	-1,700	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
4.3	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	1,036	0.00%	+18	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
4.4	State Street(R) SPDR(R) Portfolio MSCI Global Stock Market ETF Fund S000036082 · Registered fund · Jun 30, 2026 SPDR INDEX SHARES FUNDS, not summed	812	0.00%	+102	Jun 30, 2026	SPDR INDEX SHARES FUNDS, not summed
4.5	State Street Balanced Index Fund Fund S000082802 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	191	0.00%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
5	Bregua Corporation 13G CIK 1863287 · Unknown · Sep 30, 2024 Rule 13d-1(c), passive investor	2,999,990	4.91%	-830,267	Sep 30, 2024	Rule 13d-1(c), passive investor
6	Paradigm Biocapital Advisors LP 13G CIK 1855655 · Registered investment adviser · Jun 30, 2025 Rule 13d-1(c), passive investor	2,920,258	4.78%	-595,728	Jun 30, 2025	Rule 13d-1(c), passive investor
7	Adage Capital Management, L.P. 13G CIK 1535978 · Investment adviser · Jun 30, 2025 Rule 13d-1(b), qualified institution	2,525,000	4.13%	-536,750	Jun 30, 2025	Rule 13d-1(b), qualified institution
8	FMR LLC 13F CIK 315066 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	2,412,825	3.95%	-122,899	Jun 30, 2026	carried, not yet filed for the newest quarter
8.1	Fidelity Small Cap Index Fund Fund S000033638 · Registered fund · Jul 31, 2026 Fidelity Salem Street Trust, not summed	471,460	0.77%	+47,584	Jul 31, 2026	Fidelity Salem Street Trust, not summed
8.2	Fidelity Series Small Cap Core Fund Fund S000077859 · Registered fund · Jul 31, 2026 Fidelity Concord Street Trust, not summed	328,500	0.54%	+44,700	Jul 31, 2026	Fidelity Concord Street Trust, not summed
8.3	Fidelity Advisor Biotechnology Fund Fund S000005321 · Registered fund · Jul 31, 2026 Fidelity Advisor Series VII, not summed	320,385	0.52%	0	Jul 31, 2026	Fidelity Advisor Series VII, not summed
8.4	Fidelity Extended Market Index Fund Fund S000006021 · Registered fund · May 31, 2026 Fidelity Concord Street Trust, not summed	251,491	0.41%	-43,175	May 31, 2026	Fidelity Concord Street Trust, not summed
8.5	Fidelity Blue Chip Growth Fund Fund S000007195 · Registered fund · Jul 31, 2026 Fidelity Securities Fund, not summed	230,774	0.38%	0	Jul 31, 2026	Fidelity Securities Fund, not summed
9	FEDERATED HERMES, INC. 13F CIK 1056288 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,352,927	3.85%	+2,298,727	Jun 30, 2026	carried, not yet filed for the newest quarter
10	Jay Lichter, Ph.D. (“Lichter”) 13D CIK 1652901 · Unknown · Nov 6, 2024	2,146,482	3.51%	-1,943,836	Nov 6, 2024
11	Point72 Asset Management, L.P. 13F CIK 1603466 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,993,837	3.26%	+837,697	Jun 30, 2026	carried, not yet filed for the newest quarter
11.1	Point72 Asset Management, L.P. 13G CIK 1603466 · Registered investment adviser · Jun 30, 2026 Rule 13d-1(c), passive investor, not summed	1,993,837	3.26%	-1,075,922	Jun 30, 2026	Rule 13d-1(c), passive investor, not summed
12	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,857,351	3.04%	+45,986	Jun 30, 2026	carried, not yet filed for the newest quarter
13	TCG Crossover Management, LLC 13F CIK 1839948 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,789,617	2.93%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
14	Alyeska Investment Group, L.P. 13F CIK 1453072 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,647,140	2.69%	+46,051	Jun 30, 2026	carried, not yet filed for the newest quarter
15	WELLINGTON MANAGEMENT GROUP LLP 13F CIK 902219 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,507,360	2.47%	-90,290	Jun 30, 2026	carried, not yet filed for the newest quarter
16	Federated Hermes MDT Small Cap Core Fund Fund S000012972 · Registered fund · Jul 31, 2026 Federated Hermes MDT Series, not summed	1,374,115	2.25%	+1,075,927	Jul 31, 2026	Federated Hermes MDT Series, not summed
17	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,330,710	2.18%	+40,454	Jun 30, 2026	carried, not yet filed for the newest quarter
18	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	1,263,837	2.07%	+38,000	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
19	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,207,250	1.97%	+1,091,151	Jun 30, 2026	carried, not yet filed for the newest quarter
20	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,204,150	1.97%	+57,426	Jun 30, 2026	carried, not yet filed for the newest quarter
21	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,200,737	1.96%	+848,560	Jun 30, 2026	carried, not yet filed for the newest quarter
22	ALGERT GLOBAL LLC 13F CIK 1275218 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,110,889	1.82%	+667,492	Jun 30, 2026	carried, not yet filed for the newest quarter
23	D. E. Shaw & Co., Inc. 13F CIK 1009207 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,096,509	1.79%	+998,114	Jun 30, 2026	carried, not yet filed for the newest quarter
24	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	952,675	1.56%	+350,662	Jun 30, 2026	carried, not yet filed for the newest quarter
24.1	Goldman Sachs Small Cap Value Insights Fund Fund S000014929 · Registered fund · Jul 31, 2026 Goldman Sachs Trust, not summed	13,090	0.02%	—	Jul 31, 2026	Goldman Sachs Trust, not summed
24.2	Multi-Manager U.S. Small Cap Equity Fund Fund S000051363 · Registered fund · Apr 30, 2026 Goldman Sachs Trust II, not summed	9,388	0.02%	—	Apr 30, 2026	Goldman Sachs Trust II, not summed
24.3	Goldman Sachs Absolute Return Tracker Fund Fund S000020314 · Registered fund · Jun 30, 2026 GOLDMAN SACHS TRUST, not summed	78	0.00%	+11	Jun 30, 2026	GOLDMAN SACHS TRUST, not summed
25	BANK OF AMERICA CORP /DE/ 13F CIK 70858 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	910,460	1.49%	+108,814	Jun 30, 2026	carried, not yet filed for the newest quarter
26	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	836,966	1.37%	+133,026	Jun 30, 2026	carried, not yet filed for the newest quarter
26.1	E*TRADE No Fee Total Market Index Fund Fund S000090722 · Registered fund · Jul 31, 2026 E Trade Trust, not summed	463	0.00%	+450	Jul 31, 2026	E Trade Trust, not summed
27	Nantahala Capital Management, LLC 13F CIK 1472322 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	809,914	1.32%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
28	Qube Research & Technologies Ltd 13F CIK 1729829 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	702,057	1.15%	+504,912	Jun 30, 2026	carried, not yet filed for the newest quarter
29	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	552,368	0.90%	+10,573	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
30	Squarepoint Ops LLC 13F CIK 1642575 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	532,321	0.87%	-71,679	Jun 30, 2026	carried, not yet filed for the newest quarter
31	ORBIMED ADVISORS LLC 13F CIK 1055951 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	524,700	0.86%	-458,900	Jun 30, 2026	carried, not yet filed for the newest quarter
32	MILLENNIUM MANAGEMENT LLC 13F CIK 1273087 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	504,544	0.83%	+117,734	Jun 30, 2026	carried, not yet filed for the newest quarter
33	HRT FINANCIAL LP 13F CIK 1475597 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	491,001	0.80%	+124,302	Jun 30, 2026	carried, not yet filed for the newest quarter
34	VANGUARD STRATEGIC EQUITY FUND Fund S000002593 · Registered fund · Jun 30, 2026 VANGUARD HORIZON FUNDS, not summed	423,646	0.69%	0	Jun 30, 2026	VANGUARD HORIZON FUNDS, not summed
35	ADAR1 Capital Management, LLC 13F CIK 1940272 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	420,881	0.69%	+122,335	Jun 30, 2026	carried, not yet filed for the newest quarter
36	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	398,366	0.65%	+36,186	Jun 30, 2026	carried, not yet filed for the newest quarter
36.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	22,340	0.04%	+3,349	Jun 30, 2026	Northern Funds, not summed
36.2	FlexShares Morningstar US Market Factor Tilt Index Fund Fund S000033312 · Registered fund · Jul 31, 2026 FlexShares Trust, not summed	5,688	0.01%	+5,534	Jul 31, 2026	FlexShares Trust, not summed
37	JANE STREET GROUP, LLC 13F CIK 1595888 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	391,991	0.64%	+140,251	Jun 30, 2026	carried, not yet filed for the newest quarter
38	Nationale-Nederlanden Powszechne Towarzystwo Emerytalne S.A. 13F CIK 2011081 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	376,496	0.62%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
39	Federated Hermes MDT Small Cap Growth Fund Fund S000012973 · Registered fund · Jul 31, 2026 Federated Hermes MDT Series, not summed	376,425	0.62%	+244,633	Jul 31, 2026	Federated Hermes MDT Series, not summed
40	Woodline Partners LP 13F CIK 1784547 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	370,032	0.61%	-368,000	Jun 30, 2026	carried, not yet filed for the newest quarter
41	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	369,191	0.60%	+14,863	Jun 30, 2026	carried, not yet filed for the newest quarter
41.1	Schwab U.S. Small-Cap ETF Fund S000026636 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	229,332	0.38%	-3,706	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
41.2	Schwab Small-Cap Index Fund Fund S000005912 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	105,130	0.17%	+12,454	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
41.3	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	33,586	0.05%	+16,092	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
41.4	Schwab U.S. Broad Market ETF Fund S000026631 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	27,817	0.05%	0	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
42	Rock Springs Capital Management LP 13F CIK 1595725 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	367,009	0.60%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
43	Jump Financial, LLC 13F CIK 1831577 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	361,665	0.59%	+139,865	Jun 30, 2026	carried, not yet filed for the newest quarter
44	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	359,725	0.59%	+263,095	Jun 30, 2026	carried, not yet filed for the newest quarter
44.1	Dimensional U.S. Small Cap ETF Fund S000070906 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	123,038	0.20%	+60,829	Jul 31, 2026	Dimensional ETF Trust, not summed
44.2	U.S. MICRO CAP PORTFOLIO Fund S000000948 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	119,035	0.19%	+83,263	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
44.3	U.S. SMALL CAP PORTFOLIO Fund S000000971 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	86,270	0.14%	+70,073	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
44.4	Dimensional US Vector Equity ETF Fund S000086501 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	1,318	0.00%	0	Jul 31, 2026	Dimensional ETF Trust, not summed
45	Bridge Builder Small/Mid Cap Growth Fund Fund S000048336 · Registered fund · Jun 30, 2026 Bridge Builder Trust, not summed	340,741	0.56%	+338,233	Jun 30, 2026	Bridge Builder Trust, not summed
46	VANGUARD EXPLORER FUND Fund S000002578 · Registered fund · Jul 31, 2026 VANGUARD EXPLORER FUND, not summed	326,362	0.53%	0	Jul 31, 2026	VANGUARD EXPLORER FUND, not summed
47	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	315,271	0.52%	+1,623	Jun 30, 2026	carried, not yet filed for the newest quarter
48	PANAGORA ASSET MANAGEMENT INC 13F CIK 883677 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	269,113	0.44%	+269,113	Jun 30, 2026	carried, not yet filed for the newest quarter
49	Campbell David Alan Insider CIK 1864158 · Jul 31, 2026 Director, President and CEO, issuer-wide	264,742	0.43%	-123,840	Jul 31, 2026	Director, President and CEO, issuer-wide
49.1	David Campbell, Ph.D. 13G CIK 1864158 · Unknown · Sep 30, 2024 Rule 13d-1(d), exempt investor, not summed	2,644,622	4.33%	+99,547	Sep 30, 2024	Rule 13d-1(d), exempt investor, not summed
50	Man Group plc 13F CIK 1637460 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	248,801	0.41%	-94,185	Jun 30, 2026	carried, not yet filed for the newest quarter

35 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 308 holders

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Key facts CIK 1817713 CUSIP 47103J105 13F (30d) 14 filings 14 filers Visit website Investor relations