Barbara Kosacz
CIK 1763316 · COO & General Counsel · last filed 2026-05-26
"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.
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Disclosed Exposure
$243.4K
Companies
8
Total Filings
25
Lifetime Open-Market Net
$87.1K
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| 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 · Page 3 of 3
25 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2020-12-11 | Kronos Bio, Inc. (KRON) Delisted | Grant (A) | +69,824 | $0 | EDGAR |
| 2020-10-16 | Kronos Bio, Inc. (KRON) Delisted | Buy (P) | +5,250 | $99.8K | EDGAR |
| 2020-05-27 | XOMA | Grant (A) | — | $0 | EDGAR |
| 2019-05-20 | XOMA | Grant (A) | — | $0 | EDGAR |
| 2019-01-03 | XOMA | Grant (A) | — | $0 | EDGAR |
Showing 21–25 of 25
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Page 3 of 3
Codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.