XBiotech Inc.
DE ˙ DB ˙ CA98400H1029
1,91 € ↓ -0,13 (-6,24%)
2026-06-04
AKTIENPREIS
SecurityDE:4XB / XBiotech Inc.
InstitutionVanguard Group Inc
Latest Disclosed Ownership299,556 shares
Latest Disclosed Value $ 715,940
Vanguard Group Inc reports 63.43% decrease in ownership of 4XB / XBiotech Inc.

On January 29, 2026 - Vanguard Group Inc filed a 13F-HR form disclosing ownership of 299,556 shares of XBiotech Inc. (DE:4XB) valued at $566,161 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 7, 2025 disclosing 819,239 shares of XBiotech Inc.. This represents a change in shares of -63.43% during the quarter. The current value of the position is $571,553 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)
2026-01-29 2025-12-31 13F XBIOTECH COM 98400H102 299,556 -519,683 -63.43 716 -67.19 0.0000
2025-11-07 2025-09-30 13F XBIOTECH COM 98400H102 819,239 -126,166 -13.35 2,179 -22.37 0.0000
2025-08-11 2025-06-30 13F XBIOTECH COM 98400H102 945,405 -117,367 -11.04 2,808 -18.47 0.0000
2025-05-09 2025-03-31 13F XBIOTECH COM 98400H102 1,062,772 -1,832 -0.17 3,443 -18.12 0.0001
2025-02-11 2024-12-31 13F XBIOTECH COM 98400H102 1,064,604 2,625 0.25 4,205 -48.78 0.0001
2024-11-13 2024-09-30 13F XBIOTECH COM 98400H102 1,061,979 25,010 2.41 8,209 54.02 0.0001
2024-08-13 2024-06-30 13F XBIOTECH COM 98400H102 1,036,969 141,654 15.82 5,330 -26.77 0.0001
2024-05-10 2024-03-31 13F XBIOTECH COM 98400H102 895,315 13,804 1.57 7,279 106.41 0.0001
2024-03-11 2023-12-31 13F/A-1 XBIOTECH COM 98400H102 881,511 9,068 1.04 3,526 -1.89 0.0001
2024-02-14 2023-12-31 13F XBIOTECH COM 98400H102 881,511 9,068 3,526 0.0001
2023-12-18 2023-09-30 13F/A-1 XBIOTECH COM 98400H102 872,443 0 0.00 3,594 -30.64 0.0001
2023-11-14 2023-09-30 13F XBIOTECH COM 98400H102 872,443 0 3,594 0.0000
2023-08-14 2023-06-30 13F XBIOTECH COM 98400H102 872,443 17,974 2.10 5,182 75.84 0.0001
2023-07-14 2023-03-31 13F/A-1 XBIOTECH COM 98400H102 854,469 0 0.00 2,948 -1.73 0.0001
2023-05-15 2023-03-31 13F XBIOTECH COM 98400H102 854,469 0 2,948 0.0001
2023-02-10 2022-12-31 13F XBIOTECH COM 98400H102 854,469 352 0.04 2,999 -3.01 0.0001
2022-11-14 2022-09-30 13F XBIOTECH COM 98400H102 854,117 -176 -0.02 3,092 -35.72 0.0001
2022-08-12 2022-06-30 13F XBIOTECH COM 98400H102 854,293 -74,384 -8.01 4,810 -40.05 0.0001
2022-05-13 2022-03-31 13F XBIOTECH COM 98400H102 928,677 -12,130 -1.29 8,024 -23.37 0.0002
2022-02-14 2021-12-31 13F XBIOTECH COM 98400H102 940,807 55,825 6.31 10,471 -8.63 0.0002
2021-11-12 2021-09-30 13F XBIOTECH COM 98400H102 884,982 33,566 3.94 11,460 -18.72 0.0003
2021-08-13 2021-06-30 13F XBIOTECH COM 98400H102 851,416 107,826 14.50 14,100 10.44 0.0004
2021-05-14 2021-03-31 13F XBIOTECH COM 98400H102 743,590 11,411 1.56 12,767 11.40 0.0003
2021-02-12 2020-12-31 13F XBIOTECH COM 98400H102 732,179 -5,717 -0.77 11,460 -18.65 0.0003
2020-11-16 2020-09-30 13F XBIOTECH COM 98400H102 737,896 -154,651 -17.33 14,087 15.12 0.0005
2020-08-14 2020-06-30 13F XBIOTECH COM 98400H102 892,547 173,378 24.11 12,237 60.23 0.0004
2020-05-15 2020-03-31 13F XBIOTECH COM 98400H102 719,169 -270,133 -27.31 7,637 -58.64 0.0003
2020-02-14 2019-12-31 13F XBIOTECH COM 98400H102 989,302 -101,182 -9.28 18,465 61.87 0.0006
2019-11-14 2019-09-30 13F XBIOTECH COM 98400H102 1,090,484 108,064 11.00 11,407 53.18 0.0004
2019-08-14 2019-06-30 13F XBIOTECH COM 98400H102 982,420 259,660 35.93 7,447 -6.50 0.0003
2019-05-15 2019-03-31 13F XBIOTECH COM 98400H102 722,760 285,154 65.16 7,965 258.14 0.0003
2019-02-14 2018-12-31 13F XBIOTECH COM 98400H102 437,606 -396,917 -47.56 2,224 -16.20 0.0001
2018-12-13 2018-09-30 13F/A-2 XBIOTECH COM 98400H102 834,523 43,648 5.52 2,654 -25.09 0.0001
2018-11-23 2018-09-30 13F/A-1 XBIOTECH COM 98400H102 834,523 0 2,654 0.0001
2018-11-14 2018-09-30 13F XBIOTECH COM 98400H102 834,523 43,648 2,654
2018-08-14 2018-06-30 13F XBIOTECH COM 98400H102 790,875 -29,045 -3.54 3,543 -19.24 0.0001
2018-05-15 2018-03-31 13F XBIOTECH COM 98400H102 819,920 9,185 1.13 4,387 37.35 0.0002
2018-02-14 2017-12-31 13F XBIOTECH COM 98400H102 810,735 -239 -0.03 3,194 -9.88 0.0001
2017-11-14 2017-09-30 13F XBIOTECH COM 98400H102 810,974 25,340 3.23 3,544 -4.01 0.0002
2017-08-24 2017-06-30 13F/A-1 XBIOTECH COM 98400H102 785,634 41,458 5.57 3,692 -69.92 0.0002
2017-08-11 2017-06-30 13F XBIOTECH COM 98400H102 785,634 41,458 3,692
2017-05-12 2017-03-31 13F XBIOTECH COM 98400H102 744,176 33,899 4.77 12,272 70.73 0.0006
2017-02-14 2016-12-31 13F XBIOTECH COM 98400H102 710,277 22,394 3.26 7,188 -22.37 0.0004
2016-11-14 2016-09-30 13F XBIOTECH COM 98400H102 687,883 185,265 36.86 9,259 -11.94 0.0005
2016-08-10 2016-06-30 13F XBIOTECH COM 98400H102 502,618 105,511 26.57 10,515 180.18 0.0007
2016-05-13 2016-03-31 13F XBIOTECH COM 98400H102 397,107 32,495 8.91 3,753 -5.30 0.0002
2016-02-08 2015-12-31 13F XBIOTECH COM 98400H102 364,612 112,976 44.90 3,963 5.40 0.0003
2015-11-12 2015-09-30 13F/A-1 XBIOTECH COM 98400H102 251,636 48,883 24.11 3,760 2.56 0.0002
2015-11-12 2015-09-30 13F/A-1 XBIOTECH COM 98400H102 251,636 48,883 3,760 0.0002
2015-08-13 2015-06-30 13F XBIOTECH COM 98400H102 202,753 202,753 3,666 0.0002
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.