112 tracked 13F filers disclose a position in MBI as of the latest SEC 13F filings, a combined $119.4M 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 | BlackRock, Inc. | $20.1M | 3.4M | ▼−0.3% Reduced · −9K sh | Q1 2026 | |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | $11.7M | 2.0M | →First observed position No prior filed position | Q1 2026 | |
| 3 | VALUEWORKS LLC | $11.4M | 1.9M | ▼−6.3% Reduced · −131K sh | Q1 2026 | |
| 4 | Hosking Partners LLP | $9.4M | 1.6M | ▲+2.5% Added · +38K sh | Q1 2026 | |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | $6.4M | 1.1M | ▲+1.6% Added · +17K sh | Q1 2026 | |
| 6 | STATE STREET CORP | $6.3M | 1.1M | ▲+2.2% Added · +23K sh | Q1 2026 | |
| 7 | TCW GROUP INC | $6.1M | 1.0M | —Held | Q1 2026 | |
| 8 | UBS Group AG | $3.9M | 667K | ▲+4.8% Added · +30K sh | Q1 2026 | |
| 9 | Cerity Partners LLC | $2.6M | 432K | ▲+327% Added · +331K sh | Q1 2026 | |
| 10 | Russell Investments Group, Ltd. | $2.5M | 430K | ▲+479% Added · +356K sh | Q1 2026 | |
| 11 | RENAISSANCE TECHNOLOGIES LLC | $2.4M | 410K | ▲+189% Added · +268K sh | Q1 2026 | |
| 12 | NORTHERN TRUST CORP | $2.4M | 404K | ▲+4.4% Added · +17K sh | Q1 2026 | |
| 13 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $2.2M | 367K | ▼−2.5% Reduced · −9K sh | Q1 2026 | |
| 14 | TUDOR INVESTMENT CORP ET AL | $2.1M | 349K | ▲+40% Added · +100K sh | Q1 2026 | |
| 15 | GOLDMAN SACHS GROUP INC | $1.9M | 324K | ▼−4.4% Reduced · −15K sh | Q1 2026 | |
| 16 | VANGUARD FIDUCIARY TRUST CO | $1.8M | 311K | →First observed position No prior filed position | Q1 2026 | |
| 17 | JANE STREET GROUP, LLC | $1.8M | 310K | ▼−6.8% Reduced · −23K sh | Q1 2026 | |
| 18 | WHITEBOX ADVISORS LLC | $1.8M | 304K | —Held | Q1 2026 | |
| 19 | VANGUARD PORTFOLIO MANAGEMENT LLC | $1.6M | 264K | →First observed position No prior filed position | Q1 2026 | |
| 20 | MORGAN STANLEY | $1.5M | 254K | ▼−27% Reduced · −92K sh | Q1 2026 | |
| 21 | TORONTO DOMINION BANK | $1.4M | 232K | ▲New +232K sh | Q1 2026 | |
| 22 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1.3M | 225K | ▼−51% Reduced · −237K sh | Q1 2026 | |
| 23 | Squarepoint Ops LLC | $1.1M | 178K | ▲+593% Added · +152K sh | Q1 2026 | |
| 24 | CITADEL ADVISORS LLC | $1.0M | 176K | ▼−2.9% Reduced · −5K sh | Q1 2026 | |
| 25 | BANK OF AMERICA CORP /DE/ | $1.0M | 170K | ▼−31% Reduced · −78K 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, 6 funds opened a new position in MBI and 19 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 |
|---|---|---|
| BROADCOM INCAVGO | 39 funds | $7.4B |
| VISA INC-CLASS A SHARESV | 39 funds | $2.8B |
| COSTCO WHOLESALE CORPCOST | 39 funds | $2.8B |
| MICROSOFT CORPMSFT | 38 funds | $12.1B |
| AMAZON.COM INCAMZN | 38 funds | $11.0B |
| ELI LILLY & COLLY | 38 funds | $3.6B |
| CHEVRON CORPCVX | 38 funds | $2.4B |
| RTX CORPRTX | 38 funds | $1.8B |
| UNITEDHEALTH GROUP INCUNH | 38 funds | $1.8B |
| CAPITAL ONE FINANCIAL CORPCOF | 38 funds | $1.1B |
| AMERICAN EXPRESS COAXP | 38 funds | $989.6M |
| GENERAL MOTORS COGM | 38 funds | $531.9M |
Ranked by how many of MBI's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Aug 27, 2025 | Shasta Theodore | Director | Sell (S) | 6K | $50K |
| Aug 21, 2025 | DEWBREY DIANE L | Director | Sell (S) | 5K | $36K |
| Aug 19, 2025 | Shasta Theodore | Director | Sell (S) | 8K | $56K |
| Aug 12, 2025 | Shasta Theodore | Director | Sell (S) | 20K | $123K |
| Aug 11, 2025 | VAUGHAN RICHARD C | Director | Sell (S) | 25K | $152K |
| Jan 2, 2025 | Shasta Theodore | Director | Sell (S) | 10K | $65K |
| Dec 30, 2024 | Shasta Theodore | Director | Sell (S) | 11K | $69K |
| Nov 20, 2024 | VAUGHAN RICHARD C | Director | Sell (S) | 4K | $25K |
| Nov 19, 2024 | VAUGHAN RICHARD C | Director | Sell (S) | 9K | $59K |
| Jun 13, 2024 | Shasta Theodore | Director | Sell (S) | 21K | $118K |
| Dec 28, 2023 | VAUGHAN RICHARD C | Director | Sell (S) | 3K | $18K |
| Dec 27, 2023 | VAUGHAN RICHARD C | Director | Sell (S) | 12K | $76K |
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/MBI/capital-change-brief"
Use Arkolith's capital_change_brief for MBI. 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 MBI. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.