XBIT · XBiotech Inc. · Shareholders & Ownership

$2.02 +0.02 (+1.00%) At close · Oct 20

Market Cap

$61.59M

30.49M

Volume · Oct 20 41.23K Avg daily vol (3M) 48.09K

Every disclosed holder of XBIT 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 XBIT

13F quarter Jun 30, 2026

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	36	1,981,180	6.50%	Yes
Insiders (Forms 3, 4, 5)	2	316,748	1.04%	Yes
13D/G-only blocks	3	12,640,145	41.46%	Yes
Remaining	—	15,549,658	51.00%	Rest
Registered funds (N-PORT, not summed)	15	599,830	1.97%	No

Shares outstanding: 30,487,731, the issuer's latest cover-page count restated onto today's split basis.

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 XBIT

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	John Simard 13G CIK 1639078 · Unknown · Dec 31, 2025 Rule 13d-1(d), exempt investor	5,719,775	18.76%	-904,755	Dec 31, 2025	Rule 13d-1(d), exempt investor
2	Thomas Gut 13G CIK 1640283 · Unknown · Dec 31, 2023 Rule 13d-1(d), exempt investor	3,914,111	12.84%	—	Dec 31, 2023	Rule 13d-1(d), exempt investor
3	W. Thorpe McKenzie 13G CIK 1211462 · Unknown · Dec 31, 2025 Rule 13d-1(d), exempt investor	3,006,259	9.86%	+18,750	Dec 31, 2025	Rule 13d-1(d), exempt investor
4	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026	321,146	1.05%	+28,042	Jun 30, 2026
4.1	iShares Micro-Cap ETF Fund S000004439 · Registered fund · Jun 30, 2026 iShares Trust, not summed	78,591	0.26%	+26,274	Jun 30, 2026	iShares Trust, not summed
5	Kuendig Thomas Martin Insider CIK 2088590 · Aug 29, 2025 Director, issuer-wide	250,000	0.82%	—	Aug 29, 2025	Director, issuer-wide
6	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026	214,116	0.70%	-16,904	Jun 30, 2026
7	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026	200,182	0.66%	-789	Jun 30, 2026
8	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	200,182	0.66%	-789	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
9	RBF Capital, LLC 13F CIK 1134621 · Unknown · Jun 30, 2026	198,501	0.65%	0	Jun 30, 2026
10	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026	147,880	0.49%	-17,674	Jun 30, 2026
11	Fidelity Extended Market Index Fund Fund S000006021 · Registered fund · May 31, 2026 Fidelity Concord Street Trust, not summed	110,502	0.36%	+8,868	May 31, 2026	Fidelity Concord Street Trust, not summed
12	BRIDGEWAY CAPITAL MANAGEMENT, LLC 13F CIK 1107261 · Registered investment adviser · Jun 30, 2026	98,447	0.32%	0	Jun 30, 2026
12.1	Ultra-Small Company Fund Fund S000004423 · Registered fund · Jun 30, 2026 Bridgeway Funds, Inc., not summed	38,900	0.13%	0	Jun 30, 2026	Bridgeway Funds, Inc., not summed
13	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026	92,365	0.30%	+789	Jun 30, 2026
14	MILLENNIUM MANAGEMENT LLC 13F CIK 1273087 · Registered investment adviser · Jun 30, 2026	79,330	0.26%	-26,210	Jun 30, 2026
15	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026	73,006	0.24%	0	Jun 30, 2026
16	Rademaker Craig Evan Insider CIK 2086055 · Aug 29, 2025 Director, issuer-wide	66,748	0.22%	—	Aug 29, 2025	Director, issuer-wide
17	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026	66,258	0.22%	-9,829	Jun 30, 2026
18	Empowered Funds, LLC 13F CIK 1592828 · Registered investment adviser · Jun 30, 2026	59,547	0.20%	0	Jun 30, 2026
18.1	EA Bridgeway Omni Small-Cap Value ETF Fund S000078089 · Registered fund · Jun 30, 2026 EA Series Trust, not summed	59,547	0.20%	0	Jun 30, 2026	EA Series Trust, not summed
19	RENAISSANCE TECHNOLOGIES LLC 13F CIK 1037389 · Registered investment adviser · Jun 30, 2026	41,663	0.14%	+19,225	Jun 30, 2026
20	Bank of New York Mellon Corp 13F CIK 1390777 · Bank · Jun 30, 2026	39,355	0.13%	0	Jun 30, 2026
21	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026	36,053	0.12%	0	Jun 30, 2026
22	Fidelity Total Market Index Fund Fund S000006026 · Registered fund · May 31, 2026 Fidelity Concord Street Trust, not summed	35,154	0.12%	0	May 31, 2026	Fidelity Concord Street Trust, not summed
23	Squarepoint Ops LLC 13F CIK 1642575 · Registered investment adviser · Jun 30, 2026	34,757	0.11%	-6,457	Jun 30, 2026
24	Qube Research & Technologies Ltd 13F CIK 1729829 · Exempt reporting adviser · Jun 30, 2026	33,570	0.11%	+14,879	Jun 30, 2026
25	GSA CAPITAL PARTNERS LLP 13F CIK 1362033 · Registered investment adviser · Jun 30, 2026	30,654	0.10%	+30,654	Jun 30, 2026
26	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026	29,192	0.10%	+29,192	Jun 30, 2026
27	Connor, Clark & Lunn Investment Management Ltd. 13F CIK 1596800 · Registered investment adviser · Jun 30, 2026	27,943	0.09%	-720	Jun 30, 2026
28	Fidelity Series Total Market Index Fund Fund S000065248 · Registered fund · May 31, 2026 Fidelity Concord Street Trust, not summed	27,507	0.09%	0	May 31, 2026	Fidelity Concord Street Trust, not summed
29	BNP PARIBAS ARBITRAGE, SA 13F CIK 1166588 · Non-US institution · Jun 30, 2026	26,464	0.09%	-700	Jun 30, 2026
30	NATIONAL BANK OF CANADA /FI/ 13F CIK 926171 · Bank · Jun 30, 2026	25,000	0.08%	0	Jun 30, 2026
31	BANK OF AMERICA CORP /DE/ 13F CIK 70858 · Bank · Jun 30, 2026	23,789	0.08%	-12,900	Jun 30, 2026
32	AMERICAN CENTURY COMPANIES INC 13F CIK 748054 · Unknown · Jun 30, 2026	18,381	0.06%	-500	Jun 30, 2026
33	Fidelity Nasdaq Composite Index Fund Fund S000055366 · Registered fund · May 31, 2026 Fidelity Concord Street Trust, not summed	16,960	0.06%	0	May 31, 2026	Fidelity Concord Street Trust, not summed
34	Thomasville National Bank 13F CIK 1561790 · Unknown · Jun 30, 2026	13,350	0.04%	—	Jun 30, 2026
35	Avantis U.S. Small Cap Equity ETF Fund S000074835 · Registered fund · May 31, 2026 American Century ETF Trust, not summed	13,228	0.04%	0	May 31, 2026	American Century ETF Trust, not summed
36	XTX Topco Ltd 13F CIK 1828301 · Unknown · Jun 30, 2026	13,080	0.04%	-4,821	Jun 30, 2026
37	Pinnacle Financial Partners, Inc. 13F CIK 2082866 · Bank · Jun 30, 2026	11,796	0.04%	0	Jun 30, 2026
38	JANE STREET GROUP, LLC 13F CIK 1595888 · Unknown · Jun 30, 2026	11,476	0.04%	-48,624	Jun 30, 2026
39	Vanguard Global Advisers, LLC 13F CIK 1811242 · Registered investment adviser · Jun 30, 2026	7,009	0.02%	0	Jun 30, 2026
40	JNL/DFA U.S. Small Cap Fund Fund S000068110 · Registered fund · Jun 30, 2026 JNL Series Trust, not summed	6,066	0.02%	0	Jun 30, 2026	JNL Series Trust, not summed
41	1290 VT Micro Cap Portfolio Fund S000044688 · Registered fund · Jun 30, 2026 EQ Advisors Trust, not summed	5,290	0.02%	+1,424	Jun 30, 2026	EQ Advisors Trust, not summed
42	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026	5,035	0.02%	0	Jun 30, 2026
43	Avantis U.S. Small Cap Value ETF Fund S000066459 · Registered fund · May 31, 2026 American Century ETF Trust, not summed	4,871	0.02%	-500	May 31, 2026	American Century ETF Trust, not summed
44	AST Small-Cap Equity Portfolio Fund S000001978 · Registered fund · Jun 30, 2026 Advanced Series Trust, not summed	2,660	0.01%	0	Jun 30, 2026	Advanced Series Trust, not summed
45	ROYAL BANK OF CANADA 13F CIK 1000275 · Bank · Jun 30, 2026	1,206	0.00%	+17	Jun 30, 2026
46	JONES FINANCIAL COMPANIES LLLP 13F CIK 815917 · Unknown · Jun 30, 2026	370	0.00%	0	Jun 30, 2026
47	Avantis U.S. Small Cap Value Fund Fund S000066461 · Registered fund · May 31, 2026 American Century ETF Trust, not summed	282	0.00%	0	May 31, 2026	American Century ETF Trust, not summed
48	JPMORGAN CHASE & CO 13F CIK 19617 · Bank · Jun 30, 2026	96	0.00%	0	Jun 30, 2026
49	BARCLAYS PLC 13F CIK 312069 · Bank · Jun 30, 2026	94	0.00%	+94	Jun 30, 2026
50	Guggenheim Active Allocation Fund Fund · Registered fund · May 29, 2026 Guggenheim Active Allocation Fund, not summed	90	0.00%	—	May 29, 2026	Guggenheim Active Allocation Fund, not summed

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 53 holders

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Key facts CIK 1626878 CUSIP 98400H102 13F (30d) 1 filings 1 filers Visit website Investor relations