91 tracked 13F filers disclose a position in ARX as of the latest SEC 13F filings, a combined $620.1M 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 | SECURITY BENEFIT LIFE INSURANCE CO /KS/ | $68.8M | 5.9M | —Held | Q2 2026 | |
| 2 | Keenan Capital, LLC | $53.3M | 4.0M | ▲+27% Added · +853K sh | Q1 2026 | |
| 3 | GILDER GAGNON HOWE & CO LLC | $50.0M | 3.7M | ▲+1.1% Added · +40K sh | Q1 2026 | |
| 4 | AMERICAN CENTURY COMPANIES INC | $42.6M | 3.2M | ▲+109% Added · +1.7M sh | Q1 2026 | |
| 5 | BARINGS LLC | $46.1M | 3.1M | —Held | Q1 2026 | |
| 6 | ALLIANCEBERNSTEIN L.P. | $45.8M | 2.8M | ▼−1.6% Reduced · −46K sh | Q1 2026 | |
| 7 | MARSHALL WACE, LLP | $30.4M | 2.3M | ▲+553% Added · +1.9M sh | Q1 2026 | |
| 8 | VANGUARD PORTFOLIO MANAGEMENT LLC | $28.2M | 2.1M | →First observed position No prior filed position | Q1 2026 | |
| 9 | JPMORGAN CHASE & CO | $26.9M | 2.0M | ▲+3.4% Added · +67K sh | Q1 2026 | |
| 10 | VANGUARD CAPITAL MANAGEMENT LLC | $25.9M | 1.9M | →First observed position No prior filed position | Q1 2026 | |
| 11 | Cresset Asset Management, LLC | $24.6M | 1.8M | ▲New +1.8M sh | Q1 2026 | |
| 12 | FMR LLC | $24.2M | 1.8M | ▲+1.3% Added · +24K sh | Q1 2026 | |
| 13 | ArrowMark Colorado Holdings LLC | $20.7M | 1.5M | ▼−5.8% Reduced · −96K sh | Q1 2026 | |
| 14 | CITADEL ADVISORS LLC | $15.3M | 1.1M | ▲+60% Added · +429K sh | Q1 2026 | |
| 15 | T. Rowe Price Investment Management, Inc. | Withheld | 976K | ▼~0% Reduced · −150 sh | Q1 2026 | |
| 16 | Qube Research & Technologies Ltd | $12.4M | 931K | ▲New +931K sh | Q1 2026 | |
| 17 | JANE STREET GROUP, LLC | $11.5M | 861K | ▲New +861K sh | Q1 2026 | |
| 18 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $9.5M | 708K | ▲New +708K sh | Q1 2026 | |
| 19 | UBS Group AG | $9.2M | 686K | ▲+28% Added · +150K sh | Q1 2026 | |
| 20 | NORGES BANK | $10.9M | 665K | ▲New +665K sh | Q4 2025 | |
| 21 | G2 Investment Partners Management LLC | $5.0M | 373K | ▲+299% Added · +279K sh | Q1 2026 | |
| 22 | Woodline Partners LP | $4.9M | 367K | ▲+86% Added · +170K sh | Q1 2026 | |
| 23 | BNP PARIBAS FINANCIAL MARKETS | $4.1M | 305K | ▲+753% Added · +269K sh | Q1 2026 | |
| 24 | MORGAN STANLEY | $3.8M | 287K | ▲+165% Added · +179K sh | Q1 2026 | |
| 25 | RENAISSANCE TECHNOLOGIES LLC | $3.7M | 277K | ▲+280% Added · +204K 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, 14 funds opened a new position in ARX and 20 added to an existing one, while 11 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 | 34 funds | $10.4B |
| NVIDIA CORPNVDA | 33 funds | $19.5B |
| AMAZON.COM INCAMZN | 33 funds | $11.7B |
| COSTCO WHOLESALE CORPCOST | 33 funds | $2.3B |
| CITIGROUP INCC | 32 funds | $1.6B |
| SERVICENOW INCNOW | 32 funds | $1.1B |
| SCHWAB (CHARLES) CORPSCHW | 32 funds | $830.2M |
| TARGET CORPTGT | 32 funds | $755.2M |
| ALPHABET INC-CL AGOOGL | 31 funds | $9.8B |
| META PLATFORMS INC-CLASS AMETA | 31 funds | $7.5B |
| BROADCOM INCAVGO | 31 funds | $7.3B |
| TESLA INCTSLA | 31 funds | $4.5B |
Ranked by how many of ARX's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jul 28, 2026 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell (S) | 105K | $1.5M |
| Jul 27, 2026 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell (S) | 110K | $1.6M |
| Jul 27, 2026 | Sternberg Matthew David | COO, Risk Exchange | Sell (S) | 18K | $257K |
| Jul 27, 2026 | RADKE JEFFREY L | Co-Founder, CEO, Director, 10% Owner | Sell (S) | 80K | $1.2M |
| Jul 27, 2026 | RADKE JEFFREY L | Co-Founder, CEO, Director, 10% Owner | Sell (S) | 15K | $220K |
| Jul 20, 2026 | RADKE JEFFREY L | Co-Founder, CEO, Director, 10% Owner | Sell (S) | 80K | $1.1M |
| Jul 17, 2026 | RADKE JEFFREY L | Co-Founder, CEO, Director, 10% Owner | Sell (S) | 15K | $211K |
| Jul 15, 2026 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell (S) | 83K | $1.1M |
| Jul 14, 2026 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell (S) | 83K | $1.1M |
| Jul 13, 2026 | RADKE JEFFREY L | Co-Founder, CEO, Director, 10% Owner | Sell (S) | 80K | $1.1M |
| Jul 6, 2026 | RADKE JEFFREY L | Co-Founder, CEO, Director, 10% Owner | Sell (S) | 80K | $1.1M |
| Jun 29, 2026 | RADKE JEFFREY L | Co-Founder, CEO, Director, 10% Owner | Sell (S) | 80K | $1.0M |
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/ARX/capital-change-brief"
Use Arkolith's capital_change_brief for ARX. 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 ARX. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.