Richard Peter Marshall is Director at Serina Therapeutics, Inc. (SER). They have made 1 open-market trade across 1 company since 2026, most recently 2026-05-19.
CIK 0002016188
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
1 open-market purchase totalling $20K since 2026, never a sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| SER | 12,183 | $24K |
Shares reported on the most recent Form 4, priced at the 2026-05-22 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| SER | BUY | 2026-05-19 | 2026-05-22 | $1.65 | $20K | +0.0% | +2.6% | +38.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.