115 tracked 13F filers disclose a position in CATX as of the latest SEC 13F filings, a combined $299.8M in reported value. 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.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | TCG Crossover Management, LLC | $33.0M | 7.9M | ▲New +7.9M sh | Q1 2026 | |
| 2 | Commodore Capital LP | $26.4M | 6.3M | ▲New +6.3M sh | Q1 2026 | |
| 3 | Avidity Partners Management LP | $25.2M | 6.0M | ▲+88% Added · +2.8M sh | Q1 2026 | |
| 4 | BlackRock, Inc. | $22.3M | 5.3M | ▲+17% Added · +789K sh | Q1 2026 | |
| 5 | Opaleye Management Inc. | $19.5M | 4.7M | ▲+295% Added · +3.5M sh | Q1 2026 | |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | $18.3M | 4.4M | →First observed position No prior filed position | Q1 2026 | |
| 7 | MILLENNIUM MANAGEMENT LLC | $16.9M | 4.0M | ▲+188% Added · +2.6M sh | Q1 2026 | |
| 8 | CITADEL ADVISORS LLC | $14.9M | 3.6M | ▲13× Added · +3.3M sh | Q1 2026 | |
| 9 | Affinity Asset Advisors, LLC | $13.2M | 3.2M | ▲11× Added · +2.9M sh | Q1 2026 | |
| 10 | STATE STREET CORP | $13.1M | 3.1M | ▲+174% Added · +2.0M sh | Q1 2026 | |
| 11 | BALYASNY ASSET MANAGEMENT L.P. | $12.5M | 3.0M | ▲New +3.0M sh | Q1 2026 | |
| 12 | MORGAN STANLEY | $12.4M | 3.0M | ▼−33% Reduced · −1.5M sh | Q1 2026 | |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | $7.4M | 1.8M | ▲+25% Added · +352K sh | Q1 2026 | |
| 14 | Patient Square Capital LP | $6.8M | 1.6M | ▲+43% Added · +492K sh | Q1 2026 | |
| 15 | GOLDMAN SACHS GROUP INC | $5.2M | 1.2M | ▲+677% Added · +1.1M sh | Q1 2026 | |
| 16 | TWO SIGMA INVESTMENTS, LP | $4.2M | 1.0M | ▼−16% Reduced · −195K sh | Q1 2026 | |
| 17 | Ally Bridge Group (NY) LLC | $3.9M | 927K | ▲New +927K sh | Q1 2026 | |
| 18 | Nuveen, LLC | $3.8M | 910K | ▼−29% Reduced · −364K sh | Q1 2026 | |
| 19 | Hills Bank & Trust Co | $3.6M | 872K | ▼−7.0% Reduced · −66K sh | Q1 2026 | |
| 20 | Octagon Capital Advisors LP | $3.3M | 792K | ▲New +792K sh | Q1 2026 | |
| 21 | VANGUARD PORTFOLIO MANAGEMENT LLC | $3.1M | 752K | →First observed position No prior filed position | Q1 2026 | |
| 22 | ADAR1 Capital Management, LLC | $3.1M | 749K | ▲+687% Added · +654K sh | Q1 2026 | |
| 23 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $2.8M | 661K | ▲+24% Added · +126K sh | Q1 2026 | |
| 24 | VANGUARD FIDUCIARY TRUST CO | $2.4M | 567K | →First observed position No prior filed position | Q1 2026 | |
| 25 | NORTHERN TRUST CORP | $2.2M | 529K | ▲+20% Added · +90K 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.
Last quarter, 19 funds opened a new position in CATX and 14 added to an existing one, while 7 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 33 funds | $11.1B |
| AMAZON.COM INCAMZN | 33 funds | $9.8B |
| BROADCOM INCAVGO | 33 funds | $7.5B |
| ALPHABET INC-CL AGOOGL | 33 funds | $7.1B |
| META PLATFORMS INC-CLASS AMETA | 33 funds | $5.7B |
| ELI LILLY & COLLY | 33 funds | $2.7B |
| ADVANCED MICRO DEVICESAMD | 33 funds | $2.5B |
| COSTCO WHOLESALE CORPCOST | 33 funds | $2.5B |
| UNITEDHEALTH GROUP INCUNH | 33 funds | $1.6B |
| NVIDIA CORPNVDA | 32 funds | $18.5B |
| TESLA INCTSLA | 32 funds | $4.6B |
| APPLIED MATERIALS INCAMAT | 32 funds | $2.6B |
Ranked by how many of CATX's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Nov 13, 2025 | Hunt Jonathan Robert | Chief Accounting Officer | Buy (P) | 11K | $22K |
| Nov 12, 2025 | Williamson Robert F III | Director | Buy (P) | 9K | $20K |
| Mar 31, 2025 | Woods Lori A | Director | Buy (P) | 23K | $50K |
| Mar 31, 2025 | Williamson Robert F III | Director | Buy (P) | 38K | $82K |
| Mar 28, 2025 | Graham Juan | Chief Financial Officer | Buy (P) | 33K | $75K |
| Mar 28, 2025 | Williamson Robert F III | Director | Buy (P) | 22K | $50K |
| Mar 28, 2025 | Spoor Johan M. | Chief Executive Officer, Director | Buy (P) | 5K | $10K |
| Mar 28, 2025 | Spoor Johan M. | Chief Executive Officer, Director | Buy (P) | 22K | $49K |
| Dec 4, 2024 | Spoor Johan M. | CEO, Director | Buy (P) | 8K | $30K |
| Dec 4, 2024 | HENSON HEIDI | Director | Buy (P) | 26K | $100K |
| Nov 25, 2024 | Spoor Johan M. | CEO, Director | Buy (P) | 7K | $25K |
| Nov 25, 2024 | Spoor Johan M. | CEO, Director | Buy (P) | 15K | $55K |
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/CATX/capital-change-brief"
Use Arkolith's capital_change_brief for CATX. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for CATX. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.