SES · Insider Trading
SES AI Corporation
Every open-market purchase and sale reported by SES officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-10-07 | Paul Diemer | Director | A | +320,000 | — |
| 2026-09-03 | Kang Xu | CHIEF TECHNOLOGY OFFICER | F | −35,198 | −$18.41K |
| 2019-10-21 | PAULSON & CO. INC. | 10%+ Owner | Buy | +1,000,000 deriv. | — |
| 2019-10-21 | PAULSON & CO. INC. | 10%+ Owner | MIXED | +9,398 | +$12 |
| 2018-03-13 | Robert Ford Anderson | Director | A | +34,064 deriv. | — |
| 2018-03-09 | Harry M Rubin | Director | A | +45,727 deriv. | — |
| 2018-03-09 | Charles M Brown | Director | A | +41,570 deriv. | — |
| 2018-03-09 | Lorenzo Cesar Lamadrid | Director | A | +45,727 deriv. | — |
| 2018-03-09 | Denis Slavich | Director | A | +45,727 deriv. | — |
| 2018-03-09 | Ziwang Xu | Director | A | +41,570 deriv. | — |
| 2018-03-09 | Robert Wayne Rigdon | Director | A | +41,570 deriv. | — |
| 2018-01-03 | DeLome Fair | Chief Executive Officer | A | +29,458 deriv. | — |
| 2018-01-03 | David Hiscocks | Controller | A | +7,070 deriv. | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Kang Xu | CHIEF TECHNOLOGY OFFICER | 766,437 | $492.67K |
| Paul Diemer | Director | 320,000 | $205.70K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the SES quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.