Darin G Billerbeck
CIK 1388177 · Executive Chairman · last filed 2026-05-22
"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
$110.57M
Companies
3
Total Filings
102
Lifetime Open-Market Net
-$2.43M
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.
Recent Filings · Page 3 of 11
102 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2022-03-16 | MRAM | Grant (A) | −62,000 | $0 | EDGAR |
| 2021-12-20 | MRAM | Sell (S) | −19,497 | -$203.7K | EDGAR |
| 2021-12-03 | MRAM | Sell (S) | −1,547 | -$17.7K | EDGAR |
| 2021-11-23 | MRAM | Sell (S) | −38,740 | -$471.1K | EDGAR |
| 2021-09-03 | MRAM | Sell (S) | −1,540 | -$10.6K | EDGAR |
| 2021-06-04 | MRAM | Sell (S) | −1,524 | -$9.5K | EDGAR |
| 2021-05-24 | MRAM | Sell (S) | −3,457 | -$18.1K | EDGAR |
| 2021-03-31 | MRAM | — | — | $0 | EDGAR |
| 2021-03-03 | MRAM | Mixed | +3,609 | -$15.9K | EDGAR |
| 2021-01-25 | MRAM | Grant (A) | +75,000 | $0 | EDGAR |
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.