This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/XOMA/capital-change-brief"
Use Arkolith's capital_change_brief for XOMA. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BVF INC/IL | $81.3M | 2.6M | —Held | Q1 2026 | |
| 2 | MORGAN STANLEY | $53.4M | 1.7M | ▼−0.7% Reduced · −13K sh | Q1 2026 | |
| 3 | FMR LLC | $40.9M | 1.3M | ▲+12% Added · +141K sh | Q1 2026 | |
| 4 | BlackRock, Inc. | $20.3M | 647K | ▲+5.8% Added · +35K sh | Q1 2026 | |
| 5 | Woodline Partners LP | $20.1M | 640K | ▲+143% Added · +377K sh | Q1 2026 | |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | $17.2M | 550K | ▲New +550K sh | Q1 2026 | |
| 7 | Opaleye Management Inc. | $9.4M | 300K | ▲+2.5% Added · +7K sh | Q1 2026 | |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $7.2M | 230K | ▲+3.7% Added · +8K sh | Q1 2026 | |
| 9 | MILLENNIUM MANAGEMENT LLC | $6.4M | 205K | ▲New +205K sh | Q1 2026 | |
| 10 | STATE STREET CORP | $6.1M | 193K | ▲+10% Added · +18K sh | Q1 2026 | |
| 11 | DIMENSIONAL FUND ADVISORS LP | $4.2M | 133K | ▲+208% Added · +90K sh | Q1 2026 | |
| 12 | CITADEL ADVISORS LLC | $3.1M | 99K | ▲New +99K sh | Q1 2026 | |
| 13 | NORTHERN TRUST CORP | $2.9M | 93K | ▲+3.4% Added · +3K sh | Q1 2026 | |
| 14 | VANGUARD PORTFOLIO MANAGEMENT LLC | $2.7M | 86K | ▲New +86K sh | Q1 2026 | |
| 15 | Bank of New York Mellon Corp | $2.4M | 75K | ▲+9.7% Added · +7K sh | Q1 2026 | |
| 16 | UBS Group AG | $2.3M | 73K | ▲+178% Added · +46K sh | Q1 2026 | |
| 17 | VANGUARD FIDUCIARY TRUST CO | $2.1M | 67K | ▲New +67K sh | Q1 2026 | |
| 18 | PANAGORA ASSET MANAGEMENT INC | $1.8M | 59K | ▲+176% Added · +37K sh | Q1 2026 | |
| 19 | HighVista Strategies LLC | $1.5M | 47K | ▼−59% Reduced · −66K sh | Q1 2026 | |
| 20 | Quadrature Capital Ltd | $894K | 28K | ▲New +28K sh | Q1 2026 | |
| 21 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $852K | 27K | ▼−7.6% Reduced · −2K sh | Q1 2026 | |
| 22 | TWO SIGMA INVESTMENTS, LP | $818K | 26K | ▲+168% Added · +16K sh | Q1 2026 | |
| 23 | GOLDMAN SACHS GROUP INC | $753K | 24K | ▲+49% Added · +8K sh | Q1 2026 | |
| 24 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $551K | 18K | —Held | Q1 2026 | |
| 25 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $546K | 17K | ▲+81% Added · +8K sh | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jul 14, 2026 | BVF PARTNERS L P/IL | 10% Owner | Tender (U) | 772K | — |
| Jul 14, 2026 | BVF PARTNERS L P/IL | 10% Owner | Tender (U) | 412K | — |
| Jul 14, 2026 | BVF PARTNERS L P/IL | 10% Owner | Tender (U) | 2.8M | — |
| Jul 14, 2026 | BVF PARTNERS L P/IL | 10% Owner | Tender (U) | 3.6M | — |
| Jul 14, 2026 | Franklin Heather L | Director | Disposed to issuer (D) | 10K | $0 |
| Jul 14, 2026 | Franklin Heather L | Director | Disposed to issuer (D) | 11K | $0 |
| Jul 14, 2026 | Franklin Heather L | Director | Disposed to issuer (D) | 9K | $0 |
| Jul 14, 2026 | Franklin Heather L | Director | Disposed to issuer (D) | 17K | $0 |
| Jul 14, 2026 | Franklin Heather L | Director | Other (J) | 6K | — |
| Jul 14, 2026 | Trigilio Jeffrey | Chief Financial Officer | Disposed to issuer (D) | 26K | $0 |
| Jul 14, 2026 | Trigilio Jeffrey | Chief Financial Officer | Disposed to issuer (D) | 127K | $0 |
| Jul 14, 2026 | Trigilio Jeffrey | Chief Financial Officer | Other (J) | 104K | — |
| Company | Co-held by | Combined value |
|---|---|---|
| APPLE INCAAPL | 24 funds | $12.8B |
| MICROSOFT CORPMSFT | 24 funds | $9.5B |
| AMAZON.COM INCAMZN | 24 funds | $7.1B |
| BROADCOM INCAVGO | 24 funds | $5.7B |
| ALPHABET INC-CL CGOOG | 24 funds | $4.4B |
| TESLA INCTSLA | 24 funds | $3.3B |
| ELI LILLY & COLLY | 24 funds | $2.6B |
| COSTCO WHOLESALE CORPCOST | 24 funds | $2.1B |
| VISA INC-CLASS A SHARESV | 24 funds | $1.6B |
| UNITEDHEALTH GROUP INCUNH | 24 funds | $1.2B |
| NETFLIX INCNFLX | 24 funds | $1.2B |
| ORACLE CORPORCL | 24 funds | $1.2B |
Ranked by how many of XOMA's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for XOMA. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes. Every panel above is one call to the Arkolith API & MCP server.