John A DeFord
CIK 1403373 · Sr. VP Sci Tech and Clin Afrs · last filed 2026-08-03
"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
$4.36M
Companies
4
Total Filings
99
Lifetime Open-Market Net
$100.6K
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 |
|---|---|---|---|---|---|---|---|
| NDSN | Director | 5,902 | $311.36 | $1.84M | $0 | 18 | 2026-08-03 |
| MRVI | Director | 205,478 | $5.81 | $1.19M | $100.6K | 5 | 2026-05-28 |
| GMED | Director | 15,578 | $85.15 | $1.33M | $0 | 5 | 2026-01-23 |
| NUVASIVE INC (NUVA) Delisted | Director | — | $39.75 | — | $0 | 8 | 2023-09-05 |
Recent Filings · Page 2 of 10
99 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 |
|---|---|---|---|---|---|
| 2024-11-04 | NDSN | Grant (A) | +747 | $186.0K | EDGAR |
| 2024-05-24 | MRVI | Grant (A) | +20,645 | $222.6K | EDGAR |
| 2024-01-30 | GMED | Grant (A) | — | $0 | EDGAR |
| 2023-11-02 | NDSN | Grant (A) | +854 | $180.8K | EDGAR |
| 2023-09-06 | GMED | Grant (A) | +15,578 | $0 | EDGAR |
| 2023-09-06 | GMED | Grant (A) | +15,578 | $0 | EDGAR |
| 2023-09-05 | NUVASIVE INC (NUVA) Delisted | Disp (D) | — | $0 | EDGAR |
| 2023-08-01 | NDSN | Grant (A) | +89 | $22.4K | EDGAR |
| 2023-07-21 | MRVI | Grant (A) | +31,901 | $0 | EDGAR |
| 2023-06-12 | NUVASIVE INC (NUVA) Delisted | Grant (A) | — | $0 | 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.