$XBIT

$1.85 -$0.08 (4.15%) Close

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

Ownership

13F as of Q2 2026 · 30.5M shares outstanding

Who owns XBIT?

By type of holder

Institutions 6.5% Insiders 1.5% Everyone else 92.0%

Concentration Top 10 holders own 6.0%

BlackRock, Inc. 1.1% · Kuendig Thomas Martin 1.0%

Institutional ownership

6.5%

-0.0 pts vs last qtr

Institutional holders

-1 vs last qtr

Net shares bought

−11.6K

by institutions in Q2 2026

New / sold out

4 / 5

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Gsa Capital Partners LLP NEW +30.7K
Citadel Advisors LLC NEW +29.2K

Biggest sellers in Q2 2026

Jane Street Group, LLC −48.6K
Millennium Management LLC −26.2K

Who is planning to sell?

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

Is your stake being diluted?

Diluted share count, FY2017–FY2025

−12.6%

−1.67% a year

Each share's claim on the business

+14.4%

grew without buying or selling a share

Spent on buybacks vs paid in stock

$14K vs $37.5M

over 9 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+ years63% 3–5 years13% 1–3 years17% Under 1 year6%

Quarterly turnover

7.1%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting XBIT on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	321.1K	1.05%	+28.0K (+9.6%)	≤2021	0.0%
Shares held by quarter Peak holding1.3M (Q4'24) Change over 8 quarters−928.9K Share of the company1.050% BlackRock, Inc.'s full portfolio →
GC Geode Capital Management, LLC	214.1K	0.70%	−16.9K (−7.3%)	≤2021	0.0%
Shares held by quarter Peak holding461.2K (Q1'25) Change over 8 quarters−238.1K Share of the company0.700% Geode Capital Management, LLC's full portfolio →

BlackRock, Inc.

321.1K

% of company

1.05%

Change vs last qtr

+28.0K (+9.6%)

Held since

≤2021

Geode Capital Management, LLC

214.1K

% of company

0.70%

Change vs last qtr

−16.9K (−7.3%)

Held since

≤2021

28 more super investors behind a free account

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

Institutional Funds

Mutual funds and ETFs reporting XBIT on Form N-PORT; together they hold 1.9% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VE Vanguard Extended Market Index Fund Vanguard Index Funds	$460K	200.2K	0.66%	0.00%	June 30, 2026
FE Fidelity Extended Market Index Fund Fidelity Concord Street Trust	$215K	94.2K	0.31%	0.00%	August 31, 2026

Vanguard Extended Market Index Fund

Vanguard Index Funds

Position value

$460K

% of company

0.66%

% of the fund

0.00%

As of

June 30, 2026

Fidelity Extended Market Index Fund

Fidelity Concord Street Trust

Position value

$215K

% of company

0.31%

% of the fund

0.00%

As of

August 31, 2026

13 more funds behind a free account

See every fund holding XBiotech 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
KT Kuendig Thomas Martin Insider	300.0K	0.98%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.980% Kuendig Thomas Martin's insider activity →
RC Rademaker Craig Evan Insider	171.0K	0.56%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.560% Rademaker Craig Evan's insider activity →

Kuendig Thomas Martin

Insider

300.0K

% of company

0.98%

Change vs last qtr

—

Held since

—

Rademaker Craig Evan

Insider

171.0K

% of company

0.56%

Change vs last qtr

—

Held since

—

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