XBiotech Inc.
DE ˙ DB ˙ CA98400H1029
1,91 € ↓ -0,13 (-6,24%)
2026-06-04
DEL PRIS
SecurityDE:4XB / XBiotech Inc.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership36,053 shares
Latest Disclosed Value $ 84,545
Dimensional Fund Advisors Lp reports 28.88% decrease in ownership of 4XB / XBiotech Inc.

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 36,053 shares of XBiotech Inc. (DE:4XB) valued at $66,698 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 50,695 shares of XBiotech Inc.. This represents a change in shares of -28.88% during the quarter. The current value of the position is $68,789 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-07 2026-03-31 13F XBIOTECH COM 98400H102 36,053 -14,642 -28.88 85 -30.58 0.0000
2026-02-12 2025-12-31 13F XBIOTECH COM 98400H102 50,695 -13,621 -21.18 121 -29.24 0.0000
2025-11-12 2025-09-30 13F XBIOTECH COM 98400H102 64,316 -6,649 -9.37 171 -18.57 0.0000
2025-08-12 2025-06-30 13F XBIOTECH COM 98400H102 70,965 -2,561 -3.48 210 -11.39 0.0000
2025-05-13 2025-03-31 13F XBIOTECH COM 98400H102 73,526 -1,609 -2.14 238 -20.20 0.0001
2025-02-13 2024-12-31 13F XBIOTECH COM 98400H102 75,135 2,660 3.67 297 -46.87 0.0001
2024-11-07 2024-09-30 13F XBIOTECH COM 98400H102 72,475 0 0.00 559 50.67 0.0001
2024-08-09 2024-06-30 13F XBIOTECH COM 98400H102 72,475 0 0.00 371 -37.01 0.0001
2024-05-10 2024-03-31 13F XBIOTECH COM 98400H102 72,475 0 0.00 589 103.81 0.0002
2024-02-07 2023-12-31 13F XBIOTECH COM 98400H102 72,475 0 0.00 290 -3.02 0.0001
2023-11-09 2023-09-30 13F XBIOTECH COM 98400H102 72,475 -1,839 -2.47 298 -32.43 0.0001
2023-08-09 2023-06-30 13F XBIOTECH COM 98400H102 74,314 -812 -1.08 442 70.27 0.0001
2023-05-12 2023-03-31 13F XBIOTECH COM 98400H102 75,126 -7,272 -8.83 259 0.0001
2023-02-09 2022-12-31 13F XBIOTECH COM 98400H102 82,398 -3,875 -4.49 0 -100.00 0.0001
2022-11-10 2022-09-30 13F XBIOTECH COM 98400H102 86,273 -80,822 -48.37 312 -66.84 0.0001
2022-08-12 2022-06-30 13F XBIOTECH COM 98400H102 167,095 13,177 8.56 941 -29.25 0.0003
2022-05-13 2022-03-31 13F XBIOTECH COM 98400H102 153,918 51,872 50.83 1,330 17.08 0.0004
2022-02-09 2021-12-31 13F XBIOTECH COM 98400H102 102,046 66,713 188.81 1,136 148.03 0.0003
2021-11-12 2021-09-30 13F XBIOTECH COM 98400H102 35,333 9,554 37.06 458 7.26 0.0001
2021-08-12 2021-06-30 13F XBIOTECH COM 98400H102 25,779 -1,637 -5.97 427 -9.34 0.0001
2021-05-14 2021-03-31 13F XBIOTECH COM 98400H102 27,416 0 0.00 471 9.79 0.0002
2021-03-08 2020-12-31 13F/A-2 XBIOTECH COM 98400H102 27,416 0 0.00 429 -17.97 0.0002
2021-02-11 2020-12-31 13F XBIOTECH COM 98400H102 27,416 0 429 154.9320
2020-11-12 2020-09-30 13F XBIOTECH COM 98400H102 27,416 0 0.00 523 39.10 0.0002
2020-08-13 2020-06-30 13F XBIOTECH COM 98400H102 27,416 -9,572 -25.88 376 -4.33 0.0002
2020-05-14 2020-03-31 13F XBIOTECH COM 98400H102 36,988 -8,671 -18.99 393 -53.87 0.0002
2020-02-14 2019-12-31 13F XBIOTECH COM 98400H102 45,659 0 0.00 852 78.24 0.0003
2019-11-12 2019-09-30 13F XBIOTECH COM 98400H102 45,659 0 0.00 478 38.15 0.0002
2019-08-13 2019-06-30 13F XBIOTECH COM 98400H102 45,659 0 0.00 346 -31.21 0.0001
2019-08-12 2019-03-31 13F/A-2 XBIOTECH COM 98400H102 45,659 0 0.00 503 116.81 0.0002
2019-05-10 2019-03-31 13F XBIOTECH COM 98400H102 45,659 0 503
2019-02-26 2018-12-31 13F/A-1 XBIOTECH COM 98400H102 45,659 0 0.00 232 60.00 0.0001
2019-02-13 2018-12-31 13F XBIOTECH COM 98400H102 45,659 0 232
2018-11-13 2018-09-30 13F XBIOTECH COM 98400H102 45,659 8,049 21.40 145 -13.69 0.0001
2018-08-10 2018-06-30 13F XBIOTECH COM 98400H102 37,610 0 0.00 168 -16.42 0.0001
2018-05-11 2018-03-31 13F XBIOTECH COM 98400H102 37,610 12,099 47.43 201 99.01 0.0001
2018-02-12 2017-12-31 13F XBIOTECH COM 98400H102 25,511 0 0.00 101 -9.01 0.0000
2017-11-13 2017-09-30 13F XBIOTECH COM 98400H102 25,511 0 0.00 111 -7.50 0.0000
2017-08-11 2017-06-30 13F XBIOTECH COM 98400H102 25,511 25,511 120 0.0001
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.