# XBIOTECH INC COM

XBIOTECH INC COM is a security (CUSIP 98400H102) tracked across SEC portfolio filings. 42 institutional managers reported $4.8M on Form 13F as of 2026-06-30; 2 registered fund positions totaling $472K via N-PORT as of 2026-05-29.

## Summary

- Issuer: XBIOTECH INC
- Class: COM
- CUSIP: 98400H102
- Asset category: EC
- 13F holders: 42
- 13F value: $4.8M
- 13F period: 2026-06-30
- N-PORT fund positions: 2
- N-PORT value: $472K
- N-PORT report: 2026-05-29

## Top institutional holders (Form 13F)

_Showing 15 of 42 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $716K | 299,556 |
| BlackRock, Inc. | New York, NY | $689K | 293,104 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $543K | 231,020 |
| RBF Capital, LLC | SAN FRANCISCO, CA | $466K | 198,501 |
| MORGAN STANLEY | NEW YORK, NY | $389K | 165,554 |
| MILLENNIUM MANAGEMENT LLC | NEW YORK, NY | $248K | 105,540 |
| [BRIDGEWAY CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/111441) | HOUSTON, TX | $231K | 98,447 |
| NORTHERN TRUST CORP | CHICAGO, IL | $179K | 76,087 |
| STATE STREET CORP | BOSTON, MA | $172K | 73,006 |
| JANE STREET GROUP, LLC | NEW YORK, NY | $141K | 60,100 |
| Empowered Funds, LLC | HAVERTOWN, PA | $140K | 59,547 |
| [Squarepoint Ops LLC](https://search.stillhousedata.com/firm/172116) | New York, NY | $97K | 41,214 |
| Bank of New York Mellon Corp | NEW YORK, NY | $91K | 39,355 |
| BANK OF AMERICA CORP /DE/ | CHARLOTTE, NC | $86K | 36,689 |
| DIMENSIONAL FUND ADVISORS LP | AUSTIN, TX | $85K | 36,053 |

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $472K | 0.06% |
| Guggenheim Active Allocation Fund | Guggenheim Active Allocation Fund | $218 | 0.00% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/98400H102.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.