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/ONTO/capital-change-brief"
Use Arkolith's capital_change_brief for ONTO. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $1.1B | 5.5M | ▲+12% Added · +602K sh | Q1 2026 | |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC | $562.5M | 2.7M | ▲New +2.7M sh | Q1 2026 | |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | $455.8M | 2.2M | ▲New +2.2M sh | Q1 2026 | |
| 4 | STATE STREET CORP | $307.6M | 1.5M | ▲+2.8% Added · +40K sh | Q1 2026 | |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | $248.4M | 1.2M | ▲+7.4% Added · +83K sh | Q1 2026 | |
| 6 | Point72 Asset Management, L.P. | $246.8M | 1.2M | ▲+213% Added · +819K sh | Q1 2026 | |
| 7 | PARADIGM CAPITAL MANAGEMENT INC/NY | $226.1M | 1.1M | ▼−2.1% Reduced · −23K sh | Q1 2026 | |
| 8 | WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | $197.7M | 964K | ▼−44% Reduced · −762K sh | Q1 2026 | |
| 9 | VOYA INVESTMENT MANAGEMENT LLC | $187.8M | 917K | ▼−5.6% Reduced · −54K sh | Q1 2026 | |
| 10 | FMR LLC | $170.0M | 829K | ▲+84% Added · +378K sh | Q1 2026 | |
| 11 | D. E. Shaw & Co., Inc. | $148.2M | 723K | ▲+40% Added · +205K sh | Q1 2026 | |
| 12 | GENEVA CAPITAL MANAGEMENT LLC | $144.8M | 706K | ▼−15% Reduced · −125K sh | Q1 2026 | |
| 13 | DIMENSIONAL FUND ADVISORS LP | $138.9M | 678K | ▲+4.3% Added · +28K sh | Q1 2026 | |
| 14 | NORGES BANK | $104.9M | 665K | ▼−6.8% Reduced · −48K sh | Q4 2025 | |
| 15 | Fisher Asset Management, LLC | $133.3M | 650K | ▼−7.4% Reduced · −52K sh | Q1 2026 | |
| 16 | PRICE T ROWE ASSOCIATES INC /MD/ | $124.2M | 606K | ▼−11% Reduced · −74K sh | Q1 2026 | |
| 17 | JANE STREET GROUP, LLC | $124.0M | 605K | ▲300× Added · +603K sh | Q1 2026 | |
| 18 | AQR CAPITAL MANAGEMENT LLC | $121.2M | 591K | ▼−4.0% Reduced · −25K sh | Q1 2026 | |
| 19 | FRANKLIN RESOURCES INC | $118.8M | 579K | ▼−57% Reduced · −774K sh | Q1 2026 | |
| 20 | Bank of New York Mellon Corp | $116.4M | 568K | ▼−5.5% Reduced · −33K sh | Q1 2026 | |
| 21 | JENNISON ASSOCIATES LLC | $115.7M | 564K | ▼−17% Reduced · −117K sh | Q1 2026 | |
| 22 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $108.6M | 530K | ▲+5.0% Added · +25K sh | Q1 2026 | |
| 23 | MARSHALL WACE, LLP | $99.1M | 483K | ▲+12% Added · +53K sh | Q1 2026 | |
| 24 | GOLDMAN SACHS GROUP INC | $98.9M | 482K | ▲+5.9% Added · +27K sh | Q1 2026 | |
| 25 | NORTHERN TRUST CORP | $93.5M | 456K | ▲+2.4% Added · +11K 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 |
|---|---|---|---|---|---|
| May 20, 2026 | SCHWARTZ STEPHEN S | Director | Grant (A) | 761 | $0 |
| May 20, 2026 | MILLER DAVID BRIAN | Director | Grant (A) | 761 | $0 |
| May 20, 2026 | Kelley Stephen Douglas | Director | Grant (A) | 761 | $0 |
| May 20, 2026 | Lynch Susan D | Director | Grant (A) | 761 | $0 |
| May 20, 2026 | Su May | Director | Grant (A) | 761 | $0 |
| May 20, 2026 | SEAMS CHRISTOPHER A | Director | Grant (A) | 761 | $0 |
| May 15, 2026 | OH Yoon Ah | SVP, Gen Counsel & Corp Sec | Tax withholding (F) | 530 | $144K |
| May 15, 2026 | YALDAEI RAMIL | Chief Operating Officer | Tax withholding (F) | 625 | $170K |
| May 15, 2026 | YALDAEI RAMIL | Chief Operating Officer | Tax withholding (F) | 218 | $59K |
| Mar 3, 2026 | Plisinski Michael P | Chief Executive Officer, Director | Tax withholding (F) | 4K | $776K |
| Mar 3, 2026 | OH Yoon Ah | SVP, Gen Counsel & Corp Sec | Tax withholding (F) | 417 | $87K |
| Mar 3, 2026 | YALDAEI RAMIL | Chief Operating Officer | Tax withholding (F) | 615 | $128K |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 199 funds | $233.8B |
| META PLATFORMS INC-CLASS AMETA | 198 funds | $108.4B |
| AMAZON.COM INCAMZN | 196 funds | $185.6B |
| NVIDIA CORPNVDA | 195 funds | $344.9B |
| ALPHABET INC-CL AGOOGL | 195 funds | $153.3B |
| BROADCOM INCAVGO | 195 funds | $135.0B |
| APPLE INCAAPL | 190 funds | $256.6B |
| VISA INC-CLASS A SHARESV | 190 funds | $55.7B |
| ELI LILLY & COLLY | 188 funds | $70.5B |
| JPMORGAN CHASE & COJPM | 187 funds | $57.8B |
| COSTCO WHOLESALE CORPCOST | 186 funds | $40.0B |
| MICRON TECHNOLOGY INCMU | 185 funds | $31.3B |
Ranked by how many of ONTO'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 ONTO. 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.