AVIR · Atea Pharmaceuticals, Inc. · Shareholders & Ownership

$4.04 -0.01 (-0.25%) At close · Oct 23

Russell 2000 member Rebalance outlook locked

Market Cap

$322.82M

80.20M

Volume · Oct 23 245.44K Avg daily vol (3M) 313.12K

Every disclosed holder of AVIR 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 AVIR

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)	126	59,446,666	74.12%	Yes
Insiders (Forms 3, 4, 5)	13	9,081,021	11.32%	Yes
13D/G-only blocks	3	14,531,753	18.12%	Yes
Remaining	—	2,854,741	-3.56%	Negative
Registered funds (N-PORT, not summed)	148	19,089,701	23.80%	No

Shares outstanding: 80,204,699, 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 AVIR

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	FMR LLC 13F CIK 315066 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	12,004,064	14.97%	+53,292	Jun 30, 2026	carried, not yet filed for the newest quarter
1.1	Fidelity Growth Company Fund Fund S000007119 · Registered fund · May 31, 2026 Fidelity Mt. Vernon Street Trust, not summed	3,102,958	3.87%	+539,563	May 31, 2026	Fidelity Mt. Vernon Street Trust, not summed
1.2	Fidelity Growth Company K6 Fund Fund S000065696 · Registered fund · May 31, 2026 Fidelity Mt. Vernon Street Trust, not summed	1,217,814	1.52%	-6,389	May 31, 2026	Fidelity Mt. Vernon Street Trust, not summed
1.3	Fidelity Small Cap Index Fund Fund S000033638 · Registered fund · Jul 31, 2026 Fidelity Salem Street Trust, not summed	771,325	0.96%	+80,575	Jul 31, 2026	Fidelity Salem Street Trust, not summed
1.4	Fidelity Series Growth Company Fund Fund S000042626 · Registered fund · May 31, 2026 Fidelity Mt. Vernon Street Trust, not summed	733,900	0.92%	+132,623	May 31, 2026	Fidelity Mt. Vernon Street Trust, not summed
1.5	Fidelity Extended Market Index Fund Fund S000006021 · Registered fund · May 31, 2026 Fidelity Concord Street Trust, not summed	313,724	0.39%	-43,602	May 31, 2026	Fidelity Concord Street Trust, not summed
2	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	8,720,077	10.87%	+284,640	Jun 30, 2026	carried, not yet filed for the newest quarter
2.1	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	1,835,401	2.29%	+110,975	Jun 30, 2026	iShares Trust, not summed
2.2	iShares Russell 2000 Value ETF Fund S000004342 · Registered fund · Jun 30, 2026 iShares Trust, not summed	669,481	0.83%	+79,618	Jun 30, 2026	iShares Trust, not summed
2.3	BlackRock Advantage Small Cap Core Fund Fund S000039982 · Registered fund · May 29, 2026 BlackRock Funds, not summed	613,370	0.76%	-7,602	May 29, 2026	BlackRock Funds, not summed
2.4	iShares Biotechnology ETF Fund S000004350 · Registered fund · Jun 30, 2026 iShares Trust, not summed	437,948	0.55%	-22,108	Jun 30, 2026	iShares Trust, not summed
2.5	iShares Micro-Cap ETF Fund S000004439 · Registered fund · Jun 30, 2026 iShares Trust, not summed	238,228	0.30%	+61,894	Jun 30, 2026	iShares Trust, not summed
3	BML Investment Partners, L.P. 13G CIK 1373604 · Unknown · Dec 31, 2025 Rule 13d-1(c), passive investor	7,810,000	9.74%	+1,001,688	Dec 31, 2025	Rule 13d-1(c), passive investor
4	BML Capital Management, LLC 13F CIK 1616824 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	6,952,330	8.67%	-106,327	Jun 30, 2026	carried, not yet filed for the newest quarter
5	Sommadossi Jean-Pierre Insider CIK 1296995 · Feb 3, 2026 Director, President, CEO, and Chairman, issuer-wide	6,633,855	8.27%	+466,890	Feb 3, 2026	Director, President, CEO, and Chairman, issuer-wide
5.1	Jean-Pierre Sommadossi 13G CIK 1296995 · Unknown · Mar 31, 2025 Rule 13d-1(d), exempt investor, not summed	8,876,453	11.07%	+713,539	Mar 31, 2025	Rule 13d-1(d), exempt investor, not summed
6	TANG CAPITAL MANAGEMENT LLC 13G CIK 1232621 · Unknown · Oct 6, 2026 Rule 13d-1(c), passive investor, not summed	4,814,700	6.00%	—	Oct 6, 2026	Rule 13d-1(c), passive investor, not summed
6.1	TANG CAPITAL MANAGEMENT LLC 13F CIK 1232621 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	4,814,700	6.00%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
7	Radoff Bradley Louis 13D CIK 1380585 · Unknown · Apr 16, 2025	3,380,100	4.21%	+275,000	Apr 16, 2025
8	EcoR1 Capital, LLC 13G CIK 1587114 · Registered investment adviser · Dec 31, 2024 Rule 13d-1(b), qualified institution	3,341,653	4.17%	-2,100,243	Dec 31, 2024	Rule 13d-1(b), qualified institution
9	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,964,862	3.70%	-281,262	Jun 30, 2026	carried, not yet filed for the newest quarter
10	Bain Capital Life Sciences Investors, LLC 13F CIK 1703031 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	2,075,639	2.59%	-284,999	Jun 30, 2026	carried, not yet filed for the newest quarter
11	ACADIAN ASSET MANAGEMENT LLC 13F CIK 916542 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	2,035,192	2.54%	+452,375	Jun 30, 2026	carried, not yet filed for the newest quarter
12	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	2,032,268	2.53%	-337,154	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
13	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,958,435	2.44%	+210,729	Jun 30, 2026	carried, not yet filed for the newest quarter
14	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	1,652,399	2.06%	-42,236	Jun 30, 2026	carried, not yet filed for the newest quarter
14.1	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	23,200	0.03%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
14.2	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	1,575	0.00%	0	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
14.3	State Street Balanced Index Fund Fund S000082802 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	674	0.00%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
15	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,506,697	1.88%	-357,467	Jun 30, 2026	carried, not yet filed for the newest quarter
16	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,299,515	1.62%	+44,031	Jun 30, 2026	carried, not yet filed for the newest quarter
16.1	U.S. SMALL CAP PORTFOLIO Fund S000000971 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	349,976	0.44%	0	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
16.2	Dimensional U.S. Small Cap ETF Fund S000070906 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	263,930	0.33%	0	Jul 31, 2026	Dimensional ETF Trust, not summed
16.3	U.S. MICRO CAP PORTFOLIO Fund S000000948 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	234,809	0.29%	0	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
16.4	U.S. CORE EQUITY 1 PORTFOLIO Fund S000000979 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	81,300	0.10%	0	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
16.5	Dimensional U.S. Core Equity 2 ETF Fund S000070903 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	58,155	0.07%	0	Jul 31, 2026	Dimensional ETF Trust, not summed
17	RENAISSANCE TECHNOLOGIES LLC 13F CIK 1037389 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,131,200	1.41%	-35,200	Jun 30, 2026	carried, not yet filed for the newest quarter
18	Rosalind Advisors, Inc. 13F CIK 1622627 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,070,550	1.33%	-101,305	Jun 30, 2026	carried, not yet filed for the newest quarter
19	JPMORGAN CHASE & CO 13F CIK 19617 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	945,918	1.18%	+5,761	Jun 30, 2026	carried, not yet filed for the newest quarter
20	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	865,318	1.08%	+56,964	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
21	Corcoran Andrea Insider CIK 1296996 · Mar 11, 2026 See Remarks, issuer-wide	823,576	1.03%	+60,000	Mar 11, 2026	See Remarks, issuer-wide
22	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	755,239	0.94%	+170,214	Jun 30, 2026	carried, not yet filed for the newest quarter
22.1	Small Cap Value Fund Fund S000001246 · Registered fund · Jun 30, 2026 Northern Funds, not summed	104,395	0.13%	—	Jun 30, 2026	Northern Funds, not summed
22.2	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	34,065	0.04%	0	Jun 30, 2026	Northern Funds, not summed
22.3	Small Cap Core Fund Fund S000001244 · Registered fund · Jun 30, 2026 Northern Funds, not summed	6,275	0.01%	-298	Jun 30, 2026	Northern Funds, not summed
23	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	719,514	0.90%	-11,506	Jun 30, 2026	carried, not yet filed for the newest quarter
23.1	E*TRADE No Fee Total Market Index Fund Fund S000090722 · Registered fund · Jul 31, 2026 E Trade Trust, not summed	557	0.00%	0	Jul 31, 2026	E Trade Trust, not summed
24	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	630,185	0.79%	+72,606	Jun 30, 2026	carried, not yet filed for the newest quarter
25	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	610,607	0.76%	+13,898	Jun 30, 2026	carried, not yet filed for the newest quarter
25.1	Schwab U.S. Small-Cap ETF Fund S000026636 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	345,893	0.43%	-5,450	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
25.2	Schwab Small-Cap Index Fund Fund S000005912 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	172,263	0.21%	+20,168	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
25.3	Schwab U.S. Broad Market ETF Fund S000026631 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	47,410	0.06%	+479	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
25.4	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	45,000	0.06%	0	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
26	BERGER FRANKLIN M Insider CIK 1273885 · Jun 18, 2026 Director, issuer-wide	536,097	0.67%	+29,600	Jun 18, 2026	Director, issuer-wide
27	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	530,856	0.66%	-57,607	Jun 30, 2026	carried, not yet filed for the newest quarter
27.1	Goldman Sachs Absolute Return Tracker Fund Fund S000020314 · Registered fund · Aug 31, 2026 GOLDMAN SACHS TRUST, not summed	64,507	0.08%	+21,656	Aug 31, 2026	GOLDMAN SACHS TRUST, not summed
28	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	469,801	0.59%	-14,904	Jun 30, 2026	carried, not yet filed for the newest quarter
29	VANGUARD RUSSELL 2000 INDEX FUND Fund S000030003 · Registered fund · May 31, 2026 VANGUARD SCOTTSDALE FUNDS, not summed	358,829	0.45%	+6,362	May 31, 2026	VANGUARD SCOTTSDALE FUNDS, not summed
30	CM Management, LLC 13F CIK 1841857 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	355,000	0.44%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
31	BARCLAYS PLC 13F CIK 312069 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	348,653	0.43%	+187,707	Jun 30, 2026	carried, not yet filed for the newest quarter
32	D. E. Shaw & Co., Inc. 13F CIK 1009207 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	345,186	0.43%	-34,128	Jun 30, 2026	carried, not yet filed for the newest quarter
33	BANQUE PICTET & CIE SA 13F CIK 1535602 · Unknown · Sep 30, 2026	345,077	0.43%	0	Sep 30, 2026
34	MILLENNIUM MANAGEMENT LLC 13F CIK 1273087 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	304,611	0.38%	-45,321	Jun 30, 2026	carried, not yet filed for the newest quarter
35	Nuveen, LLC 13F CIK 1871926 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	284,283	0.35%	+41,180	Jun 30, 2026	carried, not yet filed for the newest quarter
35.1	Nuveen Equity Index Fund Fund S000005360 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	148,672	0.19%	0	Jul 31, 2026	TIAA-CREF Funds, not summed
35.2	Nuveen Small Cap Blend Index Fund Fund S000005367 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	89,888	0.11%	0	Jul 31, 2026	TIAA-CREF Funds, not summed
35.3	College Retirement Equities Fund - Total Global Stock Account Fund S000005080 · Registered fund · Jun 30, 2026 College Retirement Equities Fund, not summed	41,180	0.05%	—	Jun 30, 2026	College Retirement Equities Fund, not summed
35.4	TIAA Separate Account VA-1 - Stock Index Account Fund S000005098 · Registered fund · Jun 30, 2026 TIAA Separate Account VA-1, not summed	1,878	0.00%	0	Jun 30, 2026	TIAA Separate Account VA-1, not summed
35.5	Nuveen Life Stock Index Fund Fund S000005094 · Registered fund · Jun 30, 2026 TIAA-CREF Life Funds, not summed	1,067	0.00%	0	Jun 30, 2026	TIAA-CREF Life Funds, not summed
36	Invesco Ltd. 13F CIK 914208 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	267,125	0.33%	+133,777	Jun 30, 2026	carried, not yet filed for the newest quarter
36.1	Invesco BuyBack AchieversTM ETF Fund S000013111 · Registered fund · Jul 31, 2026 Invesco Exchange-Traded Fund Trust, not summed	57,412	0.07%	+11,367	Jul 31, 2026	Invesco Exchange-Traded Fund Trust, not summed
36.2	Invesco RAFI US 1500 Small-Mid ETF Fund S000013120 · Registered fund · Jul 31, 2026 Invesco Exchange-Traded Fund Trust, not summed	54,498	0.07%	-6,028	Jul 31, 2026	Invesco Exchange-Traded Fund Trust, not summed
36.3	Invesco Russell 2000 Dynamic Multifactor ETF Fund S000064608 · Registered fund · May 31, 2026 Invesco Exchange-Traded Self-Indexed Fund Trust, not summed	9,805	0.01%	—	May 31, 2026	Invesco Exchange-Traded Self-Indexed Fund Trust, not summed
36.4	Invesco Nasdaq Biotechnology ETF Fund S000072469 · Registered fund · May 31, 2026 Invesco Exchange-Traded Fund Trust II, not summed	4,127	0.01%	-249	May 31, 2026	Invesco Exchange-Traded Fund Trust II, not summed
37	AQR CAPITAL MANAGEMENT LLC 13F CIK 1167557 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	247,710	0.31%	+201,601	Jun 30, 2026	carried, not yet filed for the newest quarter
38	JPMorgan U.S. Small Company Fund Fund S000002795 · Registered fund · Jun 30, 2026 JPMorgan Trust I, not summed	243,540	0.30%	-17,590	Jun 30, 2026	JPMorgan Trust I, not summed
39	Quantinno Capital Management LP 13F CIK 1759654 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	242,302	0.30%	+226,352	Jun 30, 2026	carried, not yet filed for the newest quarter
40	Opaleye Management Inc. 13F CIK 1595855 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	235,000	0.29%	-87,600	Jun 30, 2026	carried, not yet filed for the newest quarter
41	HSBC HOLDINGS PLC 13F CIK 873630 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	221,009	0.28%	-37,980	Jun 30, 2026	carried, not yet filed for the newest quarter
42	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 13F CIK 1164508 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	210,542	0.26%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
43	WELLINGTON MANAGEMENT GROUP LLP 13F CIK 902219 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	206,785	0.26%	+149,776	Jun 30, 2026	carried, not yet filed for the newest quarter
44	Bank of New York Mellon Corp 13F CIK 1390777 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	189,452	0.24%	+3,647	Jun 30, 2026	carried, not yet filed for the newest quarter
45	Auour Investments LLC 13F CIK 1789310 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	177,000	0.22%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
46	AMERICAN CENTURY COMPANIES INC 13F CIK 748054 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	170,657	0.21%	+3,427	Jun 30, 2026	carried, not yet filed for the newest quarter
47	Vavricka John Insider CIK 1829630 · Jan 31, 2026 Chief Commercial Officer, issuer-wide	165,102	0.21%	+30,513	Jan 31, 2026	Chief Commercial Officer, issuer-wide
48	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	157,224	0.20%	+108,823	Jun 30, 2026	carried, not yet filed for the newest quarter
49	VANGUARD HEALTH CARE INDEX FUND Fund S000004450 · Registered fund · May 31, 2026 VANGUARD WORLD FUND, not summed	153,768	0.19%	-1,288	May 31, 2026	VANGUARD WORLD FUND, not summed
50	Avantis U.S. Small Cap Equity ETF Fund S000074835 · Registered fund · May 31, 2026 American Century ETF Trust, not summed	151,732	0.19%	+3,654	May 31, 2026	American Century ETF Trust, not summed

30 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 210 holders

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Key facts CIK 1593899 CUSIP 04683R106 13F (30d) 16 filings 16 filers Visit website Investor relations