Matthew K Diamond
CIK 1779155 · Chief Accounting Officer · last filed 2026-06-01
"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.
Loading insider history…
Disclosed Exposure
$203.3K
Companies
2
Total Filings
15
Lifetime Open-Market Net
$0
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 |
|---|---|---|---|---|---|---|---|
| STRRP | Chief Accounting Officer | 20,175 | $10.07 | $203.3K | $0 | 2 | 2026-06-01 |
| Star Equity Holdings, Inc. (HSON) Delisted | Chief Financial Officer | 17,496 | $9.88 | $172.8K | $0 | 13 | 2025-05-30 |
Recent Filings · Page 2 of 2
15 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2022-03-22 | Star Equity Holdings, Inc. (HSON) Delisted | Tax (F) | −1,427 | -$48.4K | EDGAR |
| 2022-03-22 | Star Equity Holdings, Inc. (HSON) Delisted | Tax (F) | −590 | -$16.5K | EDGAR |
| 2022-03-14 | Star Equity Holdings, Inc. (HSON) Delisted | Grant (A) | +12,000 | $0 | EDGAR |
| 2022-03-14 | Star Equity Holdings, Inc. (HSON) Delisted | Mixed | +11,410 | $0 | EDGAR |
| 2021-03-15 | Star Equity Holdings, Inc. (HSON) Delisted | Grant (A) | +4,272 | $0 | EDGAR |
Showing 11–15 of 15
Prev
Page 2 of 2
Form 4 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.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.