XBiotech Ownership | Who Owns XBiotech?

XBiotech Ownership Summary

XBiotech is owned by 4.70% institutional investors, 36.61% insiders, and 58.68% retail investors. Blackrock is the largest institutional shareholder, holding 3.73% of XBIT shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 2.04% of its assets in XBiotech shares.

XBIT Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	XBiotech	4.70%	36.61%	58.68%
Sector	Healthcare Stocks	232.01%	10.74%	-142.75%
Industry	Biotech Stocks	381.47%	10.55%	-292.02%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock	1.13M	3.73%	$5.83M
Vanguard group	299.56K	0.98%	$715.94K
Blackrock funding, inc. /de	288.63K	0.95%	$689.83K
Millennium management	263.52K	0.86%	$1.04M
Geode capital management	221.12K	0.73%	$528.75K
Rbf capital	200.00K	0.66%	$532.00K
Morgan stanley	163.42K	0.54%	$390.57K
Northern trust	81.62K	0.27%	$217.12K
Jane street group	69.74K	0.23%	$166.67K
State street	67.31K	0.22%	$179.03K

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Rbf capital	200.00K	0.02%	$532.00K
Bridgeway capital management	59.55K	0.00%	$158.40K
Point72 asia (singapore) pte.	6.82K	0.00%	$18.13K
Xtx topco	15.06K	0.00%	$40.05K
Thomasville national bank	13.35K	0.00%	$31.91K
Empowered funds	59.55K	0.00%	$142.32K
Millennium management	263.52K	0.00%	$1.04M
Synovus financial	11.80K	0.00%	$31.38M
Mcilrath & eck	753.00	0.00%	$1.80K
Connor, clark & lunn investment management	30.23K	0.00%	$72.25K

Top Buyers

Holder	Shares	% Assets	Change
Blackrock	1.13M	0.00%	827.52K
Morgan stanley	163.42K	-	41.97K
Squarepoint ops	62.16K	0.00%	22.38K
Jane street group	69.74K	-	13.97K
Susquehanna group, llp	12.77K	-	12.77K

Top Sellers

Holder	Shares	% Assets	Change
Vanguard group	299.56K	-	-519.68K
Charles schwab investment management	-	-	-67.36K
Y-intercept (hong kong)	-	-	-47.88K
Deutsche bank ag\	-	-	-30.34K
Hrt financial lp	-	-	-26.16K

New Positions

Holder	Shares	% Assets	Change	Value
Susquehanna group, llp	12.77K	-	12.77K	$50.43K
Group one trading	7.50K	0.00%	7.50K	$29.63M
Optiver b.v.	8.00	-	8.00	$21.00

Sold Out

Holder	Change
Capital performance advisors llp	-1.00
Ifp advisors	-2.00
True wealth design	-3.00
Citigroup	-12.00
Eversource wealth advisors	-17.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	22	-51.11%	1,433,403	-51.16%	4	5.07%	6	-62.50%	9	-50.00%
Sep 30, 2025	30	-37.50%	1,945,494	-38.93%	6	5.84%	9	-64.00%	13	-23.53%
Jun 30, 2025	51	-5.56%	3,415,938	-23.72%	11	5.19%	27	58.82%	18	-18.18%
Mar 31, 2025	54	-	4,494,575	-4.70%	14	6.15%	18	-37.93%	21	110.00%
Dec 31, 2024	34	-30.61%	3,565,665	-26.50%	11	4.62%	18	-43.75%	6	-

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard US Total Market Shares ETF	623.36K	2.04%	-
Vanguard Total Stock Mkt Idx Inv	610.02K	2.00%	-13.33K
Vanguard Institutional Extnd Mkt Idx Tr	200.97K	0.66%	-
iShares Russell 2000 Value ETF	196.42K	0.64%	-
Fidelity Small Cap Index	195.37K	0.64%	-
Fidelity Extended Market Index	102.43K	0.34%	-2.37K
Vanguard Russell 2000 ETF	99.83K	0.33%	901.00
State St Russell Sm Cap® Indx SL Cl I	90.50K	0.30%	-
EA Bridgeway Omni Small-Cap Value ETF	59.55K	0.20%	59.55K
Schwab Small Cap Index	56.88K	0.19%	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jan 03, 2024	SIMARD JOHN	Chief Executive Officer	Buy	$10.00M
Oct 18, 2021	SIMARD JOHN	Chief Executive Officer	Sell	$431.25K
Oct 15, 2021	SIMARD JOHN	Chief Executive Officer	Sell	$226.47K
Oct 13, 2021	SIMARD JOHN	Chief Executive Officer	Sell	$139.53K
Oct 12, 2021	SIMARD JOHN	Chief Executive Officer	Sell	$229.94K

Insider Transactions Trends

Date	Buy	Sell
2025 Q1	-	-
2024 Q2	-	-
2024 Q1	1	-
2023 Q3	-	-
2023 Q2	-	-

XBIT Ownership FAQ

Who Owns XBiotech?

XBiotech shareholders are primarily institutional investors at 4.70%, followed by 36.61% insiders and 58.69% retail investors. The average institutional ownership in XBiotech's industry, Biotech Stocks , is 381.47%, which XBiotech falls below.

Who owns the most shares of XBiotech?

XBiotech’s largest shareholders are Blackrock (1.13M shares, 3.73%), Vanguard group (299.56K shares, 0.98%), and Blackrock funding, inc. /de (288.63K shares, 0.95%). Together, they hold 5.65% of XBiotech’s total shares outstanding.

Does Blackrock own XBiotech?

Yes, BlackRock owns 3.73% of XBiotech, totaling 1.13M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 5.83M$. In the last quarter, BlackRock increased its holdings by 827.52K shares, a 269.88% change.

Who is XBiotech’s biggest shareholder by percentage of total assets invested?

Rbf capital is XBiotech’s biggest shareholder by percentage of total assets invested, with 0.02% of its assets in 200K XBiotech shares, valued at 532K$.

Who is the top mutual fund holder of XBiotech shares?

Vanguard US Total Market Shares ETF is the top mutual fund holder of XBiotech shares, with 2.04% of its total shares outstanding invested in 623.36K XBiotech shares.

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