Quentin S. Blackford
CIK 1612451 · President and CEO · 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.
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Disclosed Exposure
$31.39M
Companies
6
Total Filings
72
Lifetime Open-Market Net
-$57.84M
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 |
|---|---|---|---|---|---|---|---|
| IRTC | President and CEO | 204,333 | $113.65 | $23.22M | -$21.29M | 18 | 2026-06-01 |
| ATEC | Director | 568,369 | $8.28 | $4.71M | $256.6K | 12 | 2025-06-13 |
| Paragon 28, Inc. (FNA) Delisted | Director | 0 | $13.09 | $0 | $0 | 4 | 2025-04-21 |
| AXGN | Director | 27,335 | $43.00 | $1.18M | $435.3K | 9 | 2022-04-01 |
| DXCM | Chief Operating Officer | 30,303 | $75.37 | $2.28M | -$35.96M | 16 | 2021-09-10 |
| NUVASIVE INC (NUVA) Delisted | CFO | 24,270 | $39.75 | $964.7K | -$1.28M | 13 | 2017-02-10 |
Recent Filings · Page 7 of 8
72 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2017-02-03 | NUVASIVE INC (NUVA) Delisted | Mixed | +5,265 | -$231.1K | EDGAR |
| 2017-01-04 | NUVASIVE INC (NUVA) Delisted | Mixed | +1,454 | -$242.0K | EDGAR |
| 2016-07-05 | NUVASIVE INC (NUVA) Delisted | Mixed | +1,495 | -$97.8K | EDGAR |
| 2016-02-03 | NUVASIVE INC (NUVA) Delisted | Mixed | +6,108 | -$171.2K | EDGAR |
| 2016-01-28 | NUVASIVE INC (NUVA) Delisted | Grant (A) | — | $0 | EDGAR |
| 2016-01-05 | NUVASIVE INC (NUVA) Delisted | Mixed | +3,578 | -$126.9K | EDGAR |
| 2015-12-07 | NUVASIVE INC (NUVA) Delisted | Sell (S) | −15,000 | -$766.5K | EDGAR |
| 2015-10-05 | NUVASIVE INC (NUVA) Delisted | Mixed | +2,035 | -$144.9K | EDGAR |
| 2015-07-06 | NUVASIVE INC (NUVA) Delisted | Mixed | +1,862 | -$60.0K | EDGAR |
| 2015-04-08 | NUVASIVE INC (NUVA) Delisted | Sell (S) | −5,000 | -$181.5K | 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.