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Quentin S. Blackford

CIK 1612451 · President and CEO · last filed 2026-06-12

Quentin S. Blackford is a President and CEO who has filed 74 SEC Form 4 insider transactions across 6 companies since 2014. The most recent filing, for ATEC, was dated Jun 12, 2026. Across all open-market trades the lifetime net is −$57.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $43.3M across reported positions.

"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

$43.25M

Companies

6

Total Filings

74

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
ATEC Director 600,381 $9.31 $5.59M $256.6K 13 2026-06-12
IRTC President and CEO 204,333 $127.84 $26.12M -$21.29M 18 2026-06-01
Paragon 28, Inc. (FNA) Delisted Director 0 $13.09 $0 $0 4 2025-04-21
AXGN Director 27,335 $46.43 $1.27M $435.3K 9 2022-04-01
DXCM Chief Operating Officer 121,212 $84.75 $10.27M -$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

74 filings
Insider 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
2026-06-12 ATEC Grant (A) +32,012 $0 EDGAR
2026-06-01 IRTC Grant (A) +178 $17.2K EDGAR
2026-03-03 IRTC Sell (S) −13,813 -$1.77M EDGAR
2026-02-27 IRTC Grant (A) +31,842 $0 EDGAR
2026-02-26 IRTC Mixed +21,147 -$3.46M EDGAR
2025-11-04 IRTC Sell (S) −14,059 -$2.57M EDGAR
2025-08-06 IRTC Sell (S) −30,000 -$4.82M EDGAR
2025-08-05 IRTC Notice (144) −30,000 -$4.82M EDGAR
2025-06-13 ATEC Grant (A) +15,131 $0 EDGAR
2025-06-03 IRTC Grant (A) +297 $21.2K EDGAR
Showing 1–10 of 74
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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.