DONALD J LISTWIN
CIK 1211436 · last filed 2023-08-04
"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
$29.96M
Companies
3
Total Filings
75
Lifetime Open-Market Net
-$4.58M
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 |
|---|---|---|---|---|---|---|---|
| CALX | Director | 807,533 | $37.10 | $29.96M | -$5.91M | 64 | 2023-08-04 |
| Violin Memory Inc (VMEM) Delisted | Director | 125,000 | — | — | $438.1K | 6 | 2016-07-05 |
| Isilon Systems, Inc. (ISLN) Delisted | Director | 0 | — | — | $886.5K | 4 | 2010-12-21 |
Recent Filings · Page 2 of 8
75 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 |
|---|---|---|---|---|---|
| 2022-05-16 | CALX | Grant (A) | — | $0 | EDGAR |
| 2022-05-11 | CALX | Sell (S) | −50,000 | -$1.96M | EDGAR |
| 2022-02-07 | CALX | Buy (P) | +10,000 | $509.4K | EDGAR |
| 2021-11-09 | CALX | Gift (G) | −15,000 | $0 | EDGAR |
| 2021-11-04 | CALX | Buy (P) | +23 | $1.7K | EDGAR |
| 2021-11-01 | CALX | Buy (P) | +15,000 | $900.0K | EDGAR |
| 2021-05-17 | CALX | Grant (A) | — | $0 | EDGAR |
| 2021-02-10 | CALX | Buy (P) | +20,000 | $715.0K | EDGAR |
| 2021-01-04 | CALX | Gift (G) | −20,000 | $0 | EDGAR |
| 2020-12-28 | CALX | Exer (M) | +7,500 | $162.5K | EDGAR |
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.