Insider profile
Quentin S. Blackford Insider Trading
This page tracks every SEC Form 4 filing since April 2023 by Quentin S. Blackford, President and CEO: 41 transactions in total, including 2 open-market purchases and 18 sales. Each record is parsed directly from the original filing, with amendments reconciled so a corrected filing never double-counts.
- Role
- President and CEO
- CIK
- 0001612451
- Companies traded
- 2
- Total filings
- 41
- First filing
- 2023-05-17
- Last filing
- 2026-08-27
Files as Blackford Quentin S. · SEC EDGAR ↗
Activity summary
The most recent open-market decision was a sale of 26,859 shares ($3.3M) on August 10, 2026.
Three year balance
Buy and sell value by quarter, Q4 23 to Q3 26. Quentin S. Blackford has been a net seller across the period shown.
Bars below the rule are sales, above are purchases. Largest quarter on the chart is $5.2M.
Insider insight
Quentin S. Blackford trades most actively in IRTC, accounting for 11 of the 41 filings on record. The largest single open-market purchase on record is $257K in ATEC, filed Mar 2024.
Track record
Most active in
Transaction History
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 27, 2026 | Quentin S. Blackford | ALGN | Award | 1,376 | — | — |
| Aug 10, 2026 | Quentin S. Blackford | IRTC | Sale | 26,859 | $124.65 | $3.35M |
| Aug 7, 2026 | Quentin S. Blackford | IRTC | Award | 48,534 | — | — |
| Jun 10, 2026 | Quentin S. Blackford | ATEC | Award | 32,012 | — | — |
| May 29, 2026 | Quentin S. Blackford | IRTC | Award | 178 | $96.81 | $17K |
36 more transactions hidden
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-H "X-Api-Key: $KEY"Companies traded
By number of filings.
Filing cadence
Filings per quarter, this window.
Busiest: Q3 25 (7 filings)
Quietest: Q3 23 (0 filings)
Reading an insider's Form 4 history
Corporate insiders (directors, officers, and holders of more than 10% of a company's stock) must report their trades to the SEC on Form 4 within two business days. Looking at one insider's filings over time shows whether they tend to buy on the open market (a discretionary use of their own money, generally the strongest signal), sell, or simply receive and exercise equity awards as compensation.
The track record above measures how this insider's past open-market purchases performed in the months after each filing. Trades made under a pre-scheduled Rule 10b5-1 plan are flagged because they carry no timing signal. To pull any insider's full history programmatically, see the insider trading API or our guide to reading Form 4 filings.