4D Molecular Therapeutics Inc
Ownership
Ownership Structure
Who owns 4D Molecular Therapeutics Inc (FDMT)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 77.0% of the shares are freely tradable; institutional investors hold 98.4%.
Largest Shareholders
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.88 | 1,588,533 | +0.0 | 09/30/2026 |
| State Street® SPDR® S&P® Biotech ETF | 2.22 | 1,227,748 | -0.8 | 10/29/2026 |
| iShares Russell 2000 ETF | 2.09 | 1,154,568 | -0.4 | 10/29/2026 |
| Janus Henderson Hrzn Biotec E2 USD | 1.64 | 904,514 | -8.1 | 06/30/2026 |
| Janus Henderson Global Life Sciences D | 1.57 | 865,417 | +9.8 | 08/31/2026 |
| Janus Henderson Glb Life Scn I2 USD | 1.52 | 837,859 | +6.0 | 08/31/2026 |
| Janus Global Life Science AUSD | 1.44 | 793,169 | +1.3 | 06/30/2026 |
| T. Rowe Price Small-Cap Stock | 0.99 | 545,407 | -40.5 | 09/30/2026 |
| Fidelity Small Cap Index | 0.91 | 501,536 | +1.1 | 07/31/2026 |
| T. Rowe Price Small-Cap Value | 0.78 | 431,350 | +0.0 | 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 |
|---|---|---|---|---|---|
| Kirn David | See Remarks | 709,153 | 8,438,921 $ | Oct 5, 2026 | direct |
| Bizily Scott | Chief Legal Officer | 8,617 | 102,542 $ | Oct 16, 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 16, 2026 | Bizily Scott | Chief Legal Officer | Sell | 1,635 | 12.84 | 20,993 |
| Oct 16, 2026 | Bizily Scott | Chief Legal Officer | Other | 1,635 | 4.14 | 6,769 |
| Oct 5, 2026 | Kirn David | See Remarks | Sell | 272 | 13.61 | 3,702 |
| Oct 5, 2026 | Kirn David | See Remarks | Sell | 58,061 | 12.92 | 750,235 |
| Sep 16, 2026 | Bizily Scott | Chief Legal Officer | Sell | 1,635 | 13.65 | 22,318 |
| Sep 16, 2026 | Bizily Scott | Chief Legal Officer | Other | 1,635 | 4.14 | 6,769 |
| Sep 14, 2026 | Kirn David | See Remarks | Sell | 58,333 | 13.90 | 811,004 |
| Sep 1, 2026 | Bizily Scott | Chief Legal Officer | Sell | 584 | 14.00 | 8,176 |
| Sep 1, 2026 | Bizily Scott | Chief Legal Officer | Other | 584 | 6.49 | 3,790 |
| Aug 19, 2026 | Kirn David | See Remarks | Sell | 25,927 | 16.42 | 425,651 |
| Aug 19, 2026 | Kirn David | See Remarks | Sell | 43,149 | 15.36 | 662,622 |
| Aug 19, 2026 | Kirn David | See Remarks | Other | 50,000 | 4.14 | 207,000 |
| Aug 17, 2026 | Bizily Scott | Chief Legal Officer | Sell | 1,635 | 12.20 | 19,947 |
| Aug 17, 2026 | Bizily Scott | Chief Legal Officer | Other | 1,635 | 4.14 | 6,769 |
| Aug 13, 2026 | Bizily Scott | Chief Legal Officer | Sell | 1,635 | 12.00 | 19,620 |
| Aug 13, 2026 | Bizily Scott | Chief Legal Officer | Other | 1,635 | 4.14 | 6,769 |
| Aug 4, 2026 | Kirn David | See Remarks | Sell | 26,842 | 10.23 | 274,596 |
| Aug 3, 2026 | Kirn David | See Remarks | Sell | 12,415 | 10.05 | 124,722 |
| Jul 10, 2026 | Kirn David | See Remarks | Sell | 442 | 12.84 | 5,673 |
| Jul 10, 2026 | Kirn David | See Remarks | Sell | 15,283 | 12.01 | 183,560 |
| Jul 9, 2026 | Kirn David | See Remarks | Sell | 42,608 | 12.87 | 548,177 |
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.