The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This stock page is the Follow view. The Build view lets your agent query MFIN owners, fund changes, insider filings, and source links through REST or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/MFIN"
Use Arkolith to show who owns MFIN, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | VANGUARD GROUP INC | $11.0M | 1.1M | ▼−1.1% Reduced · −11K sh | Q4 2025 | |
| 2 | BlackRock, Inc. | $9.5M | 1.1M | ▼−1.9% Reduced · −22K sh | Q1 2026 | |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | $7.3M | 849K | ▲New +849K sh | Q1 2026 | |
| 4 | SEI INVESTMENTS CO | $4.2M | 491K | ▲+124% Added · +272K sh | Q1 2026 | |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | $3.5M | 413K | ▲+1.6% Added · +6K sh | Q1 2026 | |
| 6 | STATE STREET CORP | $2.1M | 249K | ▲+2.0% Added · +5K sh | Q1 2026 | |
| 7 | AMERICAN CENTURY COMPANIES INC | $1.8M | 215K | ▼−0.7% Reduced · −2K sh | Q1 2026 | |
| 8 | Connor, Clark & Lunn Investment Management Ltd. | $1.8M | 213K | ▼−4.0% Reduced · −9K sh | Q1 2026 | |
| 9 | GOLDMAN SACHS GROUP INC | $1.6M | 187K | ▲+44% Added · +57K sh | Q1 2026 | |
| 10 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $1.4M | 168K | ▲+3.4% Added · +6K sh | Q1 2026 | |
| 11 | O'SHAUGHNESSY ASSET MANAGEMENT, LLC | $1.4M | 163K | ▼−8.9% Reduced · −16K sh | Q1 2026 | |
| 12 | GAMCO INVESTORS, INC. ET AL | $1.4M | 158K | —Held | Q1 2026 | |
| 13 | STIFEL FINANCIAL CORP | $1.3M | 156K | ▼−3.7% Reduced · −6K sh | Q1 2026 | |
| 14 | NORTHERN TRUST CORP | $1.1M | 123K | ▲+5.7% Added · +7K sh | Q1 2026 | |
| 15 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $1.0M | 118K | —Held | Q1 2026 | |
| 16 | Bank of New York Mellon Corp | $920K | 107K | ▼−15% Reduced · −19K sh | Q1 2026 | |
| 17 | VANGUARD FIDUCIARY TRUST CO | $895K | 105K | ▲New +105K sh | Q1 2026 | |
| 18 | TWO SIGMA INVESTMENTS, LP | $845K | 99K | ▲+154% Added · +60K sh | Q1 2026 | |
| 19 | RITHOLTZ WEALTH MANAGEMENT | $828K | 97K | ▲+4.4% Added · +4K sh | Q1 2026 | |
| 20 | VANGUARD PORTFOLIO MANAGEMENT LLC | $805K | 94K | ▲New +94K sh | Q1 2026 | |
| 21 | GABELLI FUNDS LLC | $668K | 78K | —Held | Q1 2026 | |
| 22 | Squarepoint Ops LLC | $587K | 69K | ▲+31% Added · +16K sh | Q1 2026 | |
| 23 | MORGAN STANLEY | $548K | 64K | ▼−2.2% Reduced · −1K sh | Q1 2026 | |
| 24 | Mariner, LLC | $509K | 59K | ▼−17% Reduced · −12K sh | Q1 2026 | |
| 25 | Empowered Funds, LLC | $485K | 57K | ▲New +57K 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 |
|---|---|---|---|---|---|
| Jun 9, 2026 | EVERETS JOHN | Director | Grant (A) | 13K | $0 |
| Mar 10, 2026 | MURSTEIN ANDREW | See Remarks, Director | Tax withholding (F) | 165K | $1.6M |
| Mar 10, 2026 | MURSTEIN ALVIN | See Remarks, Director | Grant (A) | 72K | $0 |
| Mar 10, 2026 | MURSTEIN ANDREW | See Remarks, Director | Grant (A) | 324K | $0 |
| Mar 10, 2026 | Poulton Donald S. | See Remarks | Grant (A) | 102K | $0 |
| Mar 10, 2026 | Poulton Donald S. | See Remarks | Tax withholding (F) | 45K | $428K |
| Mar 10, 2026 | Haley David Justin | See Remarks | Grant (A) | 39K | $0 |
| Mar 10, 2026 | MURSTEIN ALVIN | See Remarks, Director | Tax withholding (F) | 37K | $353K |
| Mar 10, 2026 | Haley David Justin | See Remarks | Tax withholding (F) | 17K | $165K |
| Mar 10, 2026 | Cutrone Anthony N. | Chief Financial Officer | Tax withholding (F) | 42K | $399K |
| Mar 10, 2026 | Cutrone Anthony N. | Chief Financial Officer | Grant (A) | 85K | $0 |
| Mar 1, 2026 | MURSTEIN ANDREW | See Remarks, Director | Tax withholding (F) | 52K | $523K |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 24 funds | $6.3B |
| AMAZON.COM INCAMZN | 24 funds | $4.5B |
| ALPHABET INC-CL AGOOGL | 24 funds | $4.2B |
| BROADCOM INCAVGO | 24 funds | $3.2B |
| META PLATFORMS INC-CLASS AMETA | 24 funds | $2.7B |
| TESLA INCTSLA | 24 funds | $2.0B |
| ELI LILLY & COLLY | 24 funds | $1.8B |
| BERKSHIRE HATHAWAY INC-CL BBRK/B | 24 funds | $1.7B |
| JOHNSON & JOHNSONJNJ | 24 funds | $1.5B |
| VISA INC-CLASS A SHARESV | 24 funds | $1.4B |
| MASTERCARD INC - AMA | 24 funds | $1.4B |
| COSTCO WHOLESALE CORPCOST | 24 funds | $1.4B |
Ranked by how many of MFIN'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 MFIN. 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.