John T Dahldorf
CIK 1365494 · CFO · 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
$18.1K
Companies
3
Total Filings
51
Lifetime Open-Market Net
-$10.42M
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 |
|---|---|---|---|---|---|---|---|
| Hyperfine, Inc. (QSIAW) Delisted | Director | — | $0.01 | — | $0 | 4 | 2026-05-22 |
| HYPR | Director | 19,586 | $0.92 | $18.1K | $0 | 3 | 2022-06-13 |
| Volcano Corp (VOLC) Delisted | CFO | 59,314 | — | — | -$10.42M | 43 | 2015-01-05 |
Recent Filings · Page 3 of 6
51 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 |
|---|---|---|---|---|---|
| 2013-02-22 | Volcano Corp (VOLC) Delisted | Sell (S) | −801 | -$19.8K | EDGAR |
| 2013-02-22 | Volcano Corp (VOLC) Delisted | Grant (A) | — | $0 | EDGAR |
| 2013-02-21 | Volcano Corp (VOLC) Delisted | Mixed | +2,066 | $0 | EDGAR |
| 2013-02-21 | Volcano Corp (VOLC) Delisted | Grant (A) | — | $0 | EDGAR |
| 2013-02-07 | Volcano Corp (VOLC) Delisted | Mixed | +2,854 | -$18.0K | EDGAR |
| 2013-02-06 | Volcano Corp (VOLC) Delisted | Mixed | +2,962 | -$78.4K | EDGAR |
| 2012-04-27 | Volcano Corp (VOLC) Delisted | Mixed | — | -$286.3K | EDGAR |
| 2012-04-17 | Volcano Corp (VOLC) Delisted | Mixed | +3,631 | -$55.4K | EDGAR |
| 2012-03-29 | Volcano Corp (VOLC) Delisted | Mixed | — | -$311.8K | EDGAR |
| 2012-02-29 | Volcano Corp (VOLC) Delisted | Mixed | +2,945 | -$49.5K | 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.