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XBIT · XBiotech Inc. · Holdings

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$2.02 +0.02 (+1.00%) At close · Oct 20
Market Cap
$61.59M
Shares
30.49M
Volume · Oct 20 41.23K Avg daily vol (3M) 48.09K

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Institutional holdings are being reconciled with SEC filings. Holder totals and changes may be incomplete until reconciliation finishes.
Holders: 37
Total Value: $4,898,474
Total Shares: 2,129,780

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 37 13F filers · Δ vs Mar 31, 2026
Top Holder
15.1%
Sep 2023 → Jun 2026 · range 12.9% – 28.7%
+0.5 pts
Top 5
50.8%
Sep 2023 → Jun 2026 · range 50.8% – 73.8%
−3.3 pts
Top 10
71.0%
Sep 2023 → Jun 2026 · range 71.0% – 86.2%
−5.2 pts
HHI
691
Sep 2023 → Jun 2026 · range 691 – 1,606
Broadly held−60

Who Holds XBIT

Last 8 quarters through Jun 30, 2026

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026: 36 filers, like-for-like change -1.2%; actively managed books -0.8%; index-like books -1.5%.

Holder type Share Filers Change
Registered adviser 43.4% 13 +3.3%
Exempt adviser 1.7% 1 +79.6%
Bank 12.4% 10 -8.4%
Non-US 1.3% 2 -2.6%
Holding company 23.7% 2 +2.3%
Adviser 0.0% 0 —
Insurer 0.0% 0 —
Benefit plan 0.0% 0 —
Broker-dealer 0.0% 0 —
Unknown 17.5% 8 -13.7%
How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Excluded 1 holder with no observed 2026-03-31 13F and 2 holders with no observed 2026-06-30 13F.

Conviction and Crowding

36 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders
0
0.000% of filers hold it in their top 10
Mar 31, 2026: 0
Holders above 5%
0
median weight 0.000%
Mar 31, 2026: 0
Crowding
1.43%
of shares outstanding, 6th percentile
Mar 31, 2026: 1.41%
Private-fund advisers
1.35%
of shares outstanding
Institutional ownership
6.50%
6.57% of the estimated free float
Top 10 holders
75.3%
of 13F shares, Herfindahl 0.077
Active holders
-0.8%
like-for-like share change of active filers
5% stakes on record
3
0 13D, 3 13G (0 institutional, 0 passive, 3 exempt)
How long holders have held it value-weighted 13.4 quarters
Under 1 year 20.8% 1 to 3 years 33.1% 3 years or more 46.0% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).

Estimated Holder Cost Basis

Quarter ended Jun 30, 2026, on that quarter's share basis

Estimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.

Estimated avg cost
$3.50
estimated per share
Mar 31, 2026: $3.61
Quarter-end price
$2.30
implied by 13F values
Estimated gain or loss
-34.4%
price against the estimated cost
Estimated at a loss
100.0%
of costed 13F value

Estimated cost covers 35.4% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.

Shareholder Targets

13F filers that own its peers but not XBIT, quarter ended Jun 30, 2026

XBIT has no holder-overlap peers, so these filers hold the largest Healthcare stocks: LLY, JNJ, ABBV, UNH, MRK, TMO, AMGN, AZN, GILD, ABT, ISRG, VRTX, CVS, DHR, SYK, BMY, PFE, MDT, MCK, ELV. 6,254 filers in all.

# Filer In peers
1 VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser, Diversified active $116,012,260,024 20 held
2 LILLY ENDOWMENT INC Unknown, Unknown $108,400,867,760 1 held
3 FMR LLC Holding company, Diversified active $102,008,860,554 20 held
4 Capital World Investors Adviser, Diversified active $89,827,396,720 14 held
5 NORGES BANK Non-US, Index-like $70,478,623,091 20 held
6 PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser, Diversified active $69,817,479,779 20 held
7 PNC FINANCIAL SERVICES GROUP, INC. Bank, Concentrated $67,493,367,200 20 held
8 Capital Research Global Investors Adviser, Diversified active $66,678,636,531 16 held
9 WELLINGTON MANAGEMENT GROUP LLP Holding company, Diversified active $62,277,671,744 20 held
10 CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser, Diversified active $56,501,508,732 20 held

Fund Ownership of XBIT by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 1.54% of shares outstanding.

Fund type Of shares outstanding Shares
Index funds 0.62% 190,123
Index ETFs 0.91% 278,773
Active ETFs 0.20% 59,547
Active funds 0.17% 53,006
Unclassified 0.06% 18,381
All registered funds 1.97% 599,830
How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Quarterly Activity

vs Mar 31, 2026
New
3
Increased
7
Decreased
11
Sold Out
3
Unchanged
15

New and Sold Out count only filers that reported a 13F for both quarters: a first-time filer's book is not a buy, and a fund that has not filed, or withheld its positions under confidential treatment, has not sold.

Holder count: -1
Institutional value: +3.5%
Shares held: +5.8%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 39 of 39
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1626878 CUSIP 98400H102 13F (30d) 1 filings 1 filers Visit website Investor relations