Quick answer
2 insiders bought Retension Pharmaceuticals, Inc. (RTSN) stock on the open market on 2026-10-13, totalling $739,200; the largest buyer was Keller Eric L. (CHIEF EXECUTIVE OFFICER) with $499,200, per SEC Form 4 filings.
Insider buyers
| Buyer | Role | Total bought |
|---|---|---|
| Keller Eric L. | CHIEF EXECUTIVE OFFICER | $499,200 |
| BERGER FRANKLIN M | Director | $240,000 |
SEC sources
Updated 2026-10-13. Source: SEC EDGAR filings (linked above). Data only. Not investment advice, no buy/sell recommendation.