WALSH MATTHEW M (CIK 1269428) reported 23 SEC Form 4 insider transactions across 2 companies over the past 18 months (most recent 2026-05-15). Recent activity: Buy CERT (15,757 shares), Buy OGN (12,047 shares), Sell OGN (4,127 shares), Buy OGN (21,546 shares), Sell OGN (7,380 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-15 | Certara, Inc. (CERT) | Director | Buy | 15,757 | $0 |
| 2026-04-02 | Organon & Co. (OGN) | Chief Financial Officer | Buy | 12,047 | $0 |
| 2026-04-02 | Organon & Co. (OGN) | Chief Financial Officer | Sell | 4,127 | $23,524 |
| 2026-04-02 | Organon & Co. (OGN) | Chief Financial Officer | Buy | 21,546 | $0 |
| 2026-04-02 | Organon & Co. (OGN) | Chief Financial Officer | Sell | 7,380 | $42,066 |
| 2026-03-31 | Organon & Co. (OGN) | Chief Financial Officer | Buy | 15,071 | $0 |
| 2026-03-31 | Organon & Co. (OGN) | Chief Financial Officer | Sell | 5,162 | $30,146 |
| 2026-03-03 | Organon & Co. (OGN) | Chief Financial Officer | Buy | 42,599 | $0 |
| 2026-03-03 | Organon & Co. (OGN) | Chief Financial Officer | Sell | 14,887 | $106,740 |
| 2026-03-03 | Organon & Co. (OGN) | Chief Financial Officer | Buy | 12,020 | $0 |
| 2026-03-03 | Organon & Co. (OGN) | Chief Financial Officer | Sell | 4,117 | $29,766 |
| 2025-05-22 | Certara, Inc. (CERT) | Director | Buy | 11,928 | $0 |
| 2025-05-06 | Organon & Co. (OGN) | Chief Financial Officer | Buy | 11,400 | $100,548 |
| 2025-04-02 | Organon & Co. (OGN) | Chief Financial Officer | Buy | 15,070 | $0 |
| 2025-04-02 | Organon & Co. (OGN) | Chief Financial Officer | Sell | 7,422 | $107,693 |
| 2025-04-02 | Organon & Co. (OGN) | Chief Financial Officer | Buy | 12,046 | $0 |
| 2025-04-02 | Organon & Co. (OGN) | Chief Financial Officer | Sell | 5,933 | $86,088 |
| 2025-04-02 | Organon & Co. (OGN) | Chief Financial Officer | Buy | 7,754 | $0 |
| 2025-04-02 | Organon & Co. (OGN) | Chief Financial Officer | Sell | 3,819 | $55,414 |
| 2025-02-24 | Organon & Co. (OGN) | Chief Financial Officer | Buy | 30,414 | $0 |
| 2025-02-24 | Organon & Co. (OGN) | Chief Financial Officer | Sell | 10,662 | $159,077 |
| 2025-02-24 | Organon & Co. (OGN) | Chief Financial Officer | Buy | 5,570 | $0 |
| 2025-02-24 | Organon & Co. (OGN) | Chief Financial Officer | Sell | 1,908 | $29,173 |
Source: SEC Form 4 filings · as of 2026-05-15