XBiotech Ownership | Who Owns XBiotech?

XBiotech Ownership Summary

XBiotech is owned by 6.38% institutional investors, 36.61% insiders, and 57.00% 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	6.38%	36.61%	57.00%
Sector	Healthcare Stocks	42.54%	10.83%	46.63%
Industry	Biotech Stocks	45.22%	10.75%	44.04%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock	1.13M	3.73%	$5.83M
Vanguard group	819.24K	2.69%	$2.18M
Blackrock funding, inc. /de	302.39K	0.99%	$804.35K
Millennium management	263.52K	0.86%	$1.04M
Geode capital management	221.86K	0.73%	$590.47K
Rbf capital	200.00K	0.66%	$532.00K
Morgan stanley	121.45K	0.40%	$323.06K
Northern trust	81.62K	0.27%	$217.12K
State street	67.31K	0.22%	$179.03K
Dimensional fund advisors lp	64.32K	0.21%	$171.15K

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
Thomasville national bank	13.35K	0.00%	$35.51K
Xtx topco	15.06K	0.00%	$40.05K
Empowered funds	59.55K	0.00%	$158.40K
Millennium management	263.52K	0.00%	$1.04M
Synovus financial	11.80K	0.00%	$31.38M
Connor, clark & lunn investment management	36.03K	0.00%	$95.84M
Hrt financial lp	26.16K	0.00%	$69.00K

Top Buyers

Holder	Shares	% Assets	Change
Blackrock	1.13M	0.00%	827.52K
Morgan stanley	121.45K	-	35.65K
Jane street group	55.77K	-	30.45K
Hrt financial lp	26.16K	0.00%	26.16K
Squarepoint ops	62.16K	0.00%	22.38K

Top Sellers

Holder	Shares	% Assets	Change
Vanguard group	819.24K	-	-126.17K
Goldman sachs group	25.00K	-	-87.08K
Blackrock funding, inc. /de	302.39K	-	-71.22K
Charles schwab investment management	-	-	-67.36K
Y-intercept (hong kong)	-	-	-47.88K

New Positions

Holder	Shares	% Assets	Change	Value
Hrt financial lp	26.16K	0.00%	26.16K	$69.00K
Susquehanna group, llp	12.77K	-	12.77K	$50.43K
Group one trading	7.50K	0.00%	7.50K	$29.63M
Srs capital advisors	22.00	-	22.00	$58.00
Optiver b.v.	8.00	-	8.00	$21.00

Sold Out

Holder	Change
Capital performance advisors llp	-1.00
Ifp advisors	-2.00
Clearstead advisors	-17.00
Smartleaf asset management	-84.00
Us bancorp \de\	-100.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
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	-
Sep 30, 2024	49	4.26%	4,851,469	7.42%	15	7.23%	32	-	6	-25.00%

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%	-91.58K
iShares Russell 2000 Value ETF	196.42K	0.64%	-
Fidelity Small Cap Index	195.37K	0.64%	-
Fidelity Extended Market Index	106.48K	0.35%	-877.00
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%	-
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 6.38%, followed by 36.61% insiders and 57.01% retail investors. The average institutional ownership in XBiotech's industry, Biotech Stocks , is 45.22%, which XBiotech falls below.

Who owns the most shares of XBiotech?

XBiotech’s largest shareholders are Blackrock (1.13M shares, 3.73%), Vanguard group (819.24K shares, 2.69%), and Blackrock funding, inc. /de (302.39K shares, 0.99%). Together, they hold 7.40% 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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