Barbara Kosacz
CIK 1763316 · COO & General Counsel · last filed 2026-05-26
Barbara Kosacz is a COO & General Counsel who has filed 25 SEC Form 4 insider transactions across 8 companies since 2019. The most recent filing, for XOMAP, was dated May 26, 2026. Across all open-market trades the lifetime net is +$87.1K, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $243.4K 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.
$243.4K
8
25
$87.1K
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| XOMAP | Director | 9,557 | $25.46 | $243.4K | $0 | 7 | 2026-05-26 |
| LONA | Director | — | $8.35 | — | $0 | 1 | 2026-04-13 |
| LeonaBio, Inc. (ATHA) Delisted | Director | — | $6.92 | — | $0 | 5 | 2025-06-03 |
| CERO THERAPEUTICS HOLDINGS, INC. (PBAXW) Delisted | Director | 5,828 | $0.05 | $292 | $0 | 1 | 2024-02-16 |
| Kronos Bio, Inc. (KRON) Delisted | COO & General Counsel | 928,966 | $0.88 | $817.5K | $87.1K | 6 | 2024-01-05 |
| CERO THERAPEUTICS HOLDINGS, INC. (PBAXU) Delisted | Director | — | $10.37 | — | $0 | 1 | 2021-10-12 |
| LWACU | Director | — | $10.30 | — | $0 | 1 | 2021-01-14 |
| XOMA | Director | — | $41.79 | — | $0 | 3 | 2020-05-27 |
Recent Filings
25 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-26 | XOMAP | Grant (A) | +3,586 | $0 | EDGAR |
| 2026-04-13 | LONA | Grant (A) | — | $0 | EDGAR |
| 2025-06-03 | LeonaBio, Inc. (ATHA) Delisted | Grant (A) | — | $0 | EDGAR |
| 2025-05-23 | XOMAP | Grant (A) | +5,971 | $0 | EDGAR |
| 2025-05-23 | XOMAP | Grant (A) | +5,971 | $0 | EDGAR |
| 2024-05-24 | LeonaBio, Inc. (ATHA) Delisted | Grant (A) | — | $0 | EDGAR |
| 2024-05-17 | XOMAP | Grant (A) | — | $0 | EDGAR |
| 2024-02-16 | CERO THERAPEUTICS HOLDINGS, INC. (PBAXW) Delisted | Other (J) | +5,828 | $0 | EDGAR |
| 2024-01-05 | Kronos Bio, Inc. (KRON) Delisted | Sell (S) | −10,676 | -$12.6K | EDGAR |
| 2023-05-22 | LeonaBio, Inc. (ATHA) Delisted | Grant (A) | — | $0 | EDGAR |