D JEFFREY KEYSER
CIK 1393516 · Chief Operating Officer · last filed 2026-05-14
D JEFFREY KEYSER is a Chief Operating Officer who has filed 15 SEC Form 4 insider transactions across 3 companies since 2007. The most recent filing shows the insider bought $100.0K of LTRN on May 14, 2026. Across all open-market trades the lifetime net is +$250.0K, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $365.9K across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$365.9K
3
15
$250.0K
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| LTRN | Director | 94,303 | $3.88 | $365.9K | $250.0K | 8 | 2026-05-14 |
| ZS Pharma, Inc. (ZSPH) Delisted | Chief Operating Officer | 225,323 | — | — | $0 | 3 | 2015-12-11 |
| ENCYSIVE PHARMACEUTICALS INC (ENCY) Delisted | V.P., Regulatory Affairs | 0 | — | — | $0 | 3 | 2008-04-03 |
Recent Filings
15 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-14 | LTRN | Buy (P) | +48,544 | $100.0K | EDGAR |
| 2026-01-13 | LTRN | Grant (A) | — | $0 | EDGAR |
| 2025-09-23 | LTRN | Mixed | — | $0 | EDGAR |
| 2024-07-26 | LTRN | Exer (X) | +3,832 | $12.0K | EDGAR |
| 2024-07-17 | LTRN | Grant (A) | — | $0 | EDGAR |
| 2021-11-08 | LTRN | Grant (A) | — | $0 | EDGAR |
| 2020-06-15 | LTRN | Mixed | +31,927 | $0 | EDGAR |
| 2020-06-15 | LTRN | Buy (P) | +10,000 | $150.0K | EDGAR |
| 2015-12-21 | — | Mixed | −228,522 | -$20.57M | |
| 2015-12-11 | ZS Pharma, Inc. (ZSPH) Delisted | Exer (M) | +9,154 | $100.0K | EDGAR |