Mark James Litton
CIK 1604834 · PRESIDENT and CEO · last filed 2026-04-13
Mark James Litton is a PRESIDENT and CEO who has filed 42 SEC Form 4 insider transactions across 4 companies since 2014. The most recent filing, for LONA, was dated Apr 13, 2026. Across all open-market trades the lifetime net is −$5.7M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $489.2K 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.
$489.2K
4
42
-$5.65M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| LONA | PRESIDENT and CEO | 58,582 | $8.35 | $489.2K | -$27.7K | 2 | 2026-04-13 |
| LeonaBio, Inc. (ATHA) Delisted | President and CEO | 44,070 | $6.92 | $305.0K | -$91.6K | 17 | 2026-01-05 |
| ALPINE IMMUNE SCIENCES, INC. (ALPN) Delisted | See Remarks | — | $64.97 | — | $0 | 2 | 2019-02-08 |
| ALDER BIOPHARMACEUTICALS INC (ALDR) Delisted | Chief Business Officer | 132,663 | — | — | -$5.53M | 21 | 2018-06-05 |
Recent Filings
42 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-04-13 | LONA | Grant (A) | — | $0 | EDGAR |
| 2026-03-05 | LONA | Mixed | +17,098 | -$27.7K | EDGAR |
| 2026-01-05 | LeonaBio, Inc. (ATHA) Delisted | Mixed | +8,248 | -$17.8K | EDGAR |
| 2025-12-29 | LeonaBio, Inc. (ATHA) Delisted | Grant (A) | — | $0 | EDGAR |
| 2025-07-02 | LeonaBio, Inc. (ATHA) Delisted | Mixed | +83,211 | -$7.4K | EDGAR |
| 2025-03-04 | LeonaBio, Inc. (ATHA) Delisted | Grant (A) | — | $0 | EDGAR |
| 2025-01-03 | LeonaBio, Inc. (ATHA) Delisted | Mixed | +83,226 | -$14.1K | EDGAR |
| 2024-10-03 | LeonaBio, Inc. (ATHA) Delisted | Grant (A) | — | $0 | EDGAR |
| 2024-10-03 | LeonaBio, Inc. (ATHA) Delisted | Grant (A) | — | $0 | EDGAR |
| 2024-09-05 | LeonaBio, Inc. (ATHA) Delisted | Mixed | +14,968 | -$2.8K | EDGAR |