Dynex Capital Inc
Ownership
Ownership Structure
Who owns Dynex Capital Inc (DX)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.5% of the shares are freely tradable; institutional investors hold 45.2%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 6.48 | 16,082,079 | +28.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 3.43 | 8,513,684 | +0.0 | 03/31/2026 |
| Millennium Management LLC | 2.83 | 7,016,976 | +154.8 | 06/30/2026 |
| Geode Capital Management, LLC | 1.91 | 4,741,442 | +35.9 | 03/31/2026 |
| State Street Corp | 1.83 | 4,534,721 | +49.5 | 03/31/2026 |
| Qube Research & Technologies | 1.49 | 3,708,393 | +201.1 | 03/31/2026 |
| Two Sigma Investments LLC | 1.19 | 2,965,239 | +52.1 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.61 | 6,481,512 | +0.0 | 07/31/2026 |
| iShares Russell 2000 ETF | 2.28 | 5,660,889 | -0.6 | 08/31/2026 |
| Vanguard Institutional Extnd Mkt Idx Tr | 1.00 | 2,475,060 | +0.6 | 07/31/2026 |
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 |
|---|---|---|---|---|---|
| Boston Byron L | Co-CEO & Chairman of the Board | 883,567 | 10,867,874 $ | Sep 8, 2026 | direct |
| Popenoe Smriti Laxman | Co-CEO and President | 531,098 | 6,532,505 $ | Sep 8, 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 |
|---|---|---|---|---|---|---|
| Sep 8, 2026 | Boston Byron L | Co-CEO & Chairman of the Board | Other | 15,667 | 12.89 | 201,948 |
| Sep 8, 2026 | Popenoe Smriti Laxman | Co-CEO and President | Other | 19,528 | 12.89 | 251,716 |
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: September 17, 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.