MSCI Inc
Ownership
Ownership Structure
Who owns MSCI Inc (MSCI)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 93.3% of the shares are freely tradable; institutional investors hold 93.9%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 7.52 | 5,468,585 | -4.7 | 06/30/2026 |
| Vanguard Capital Management, LLC | 6.39 | 4,644,770 | -0.2 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 5.73 | 4,163,745 | +3.5 | 06/30/2026 |
| BAMCO Inc | 4.42 | 3,211,753 | +19.0 | 06/30/2026 |
| State Street Corp | 4.39 | 3,194,918 | +2.6 | 06/30/2026 |
| Morgan Stanley - Brokerage Accounts | 2.93 | 2,128,743 | -5.2 | 06/30/2026 |
| T. Rowe Price Investment Management,Inc. | 2.82 | 2,049,428 | +36.0 | 06/30/2026 |
| Geode Capital Management, LLC | 2.68 | 1,950,086 | -2.5 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.86 | 2,075,742 | -6.0 | 09/30/2026 |
| Vanguard 500 Index Investor | 2.63 | 1,910,535 | -1.2 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Wiechmann Andrew C. | Chief Financial Officer | 21,644 | 13,497,198 $ | Oct 12, 2026 | direct |
| Riefler Linda H | Director | 20,998 | 13,094,353 $ | Aug 28, 2026 | direct |
| Gutowski Robert J. | General Counsel | 14,104 | 8,795,254 $ | Oct 22, 2026 | direct |
| Taneja Rajat | Director | 5,404 | 3,369,934 $ | Sep 2, 2026 | direct |
| Matlock Robin | Director | 2,037 | 1,270,273 $ | Aug 28, 2026 | direct |
| Yang June | Director | 906 | 564,982 $ | Aug 28, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 22, 2026 | Gutowski Robert J. | General Counsel | Sell | 2,381 | 623.66 | 1,484,934 |
| Oct 12, 2026 | Wiechmann Andrew C. | Chief Financial Officer | Sell | 450 | 570.00 | 256,500 |
| Sep 2, 2026 | Taneja Rajat | Director | Buy | 1,786 | 560.00 | 1,000,160 |
| Aug 28, 2026 | Yang June | Director | Other | 2 | 0.00 | – |
| Aug 28, 2026 | Matlock Robin | Director | Other | 6 | 0.00 | – |
| Aug 28, 2026 | Riefler Linda H | Director | Other | 8 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: October 30, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.