Insider transactions

Thomas William Burns

CIK 1644557 · CHAIRMAN & CEO · last filed 2026-06-29

Thomas William Burns is a CHAIRMAN & CEO who has filed 142 SEC Form 4 insider transactions across 3 companies since 2015. The most recent filing shows the insider had shares withheld for taxes covering $578.7K of GKOS on Jun 29, 2026. Across all open-market trades the lifetime net is −$104.7M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $34.8M 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
$34.78M
Companies
3
Total Filings
142
Lifetime Open-Market Net
-$104.69M

Charts

Trading activity, where the exposure sits, and each trade against the stock price.

GKOS price and trades

Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.

Shares held

Shares owned after each reported transaction on this company (direct holdings as reported).

Open-market buying and selling

by month

Dollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.

Exposure by company

latest
OfficerDirector10% owner* stale (no filing in 3 yrs)

Most recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.

Filer Profile

Reported Address
C/O GLAUKOS CORPORATION,
26051 MERIT CIRCLE, SUITE 103
LAGUNA HILLS, CA 92653
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

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
GKOS CHAIRMAN & CEO 188,967 $182.89 $34.56M -$104.69M 106 2026-06-29
LUNG Director 113,399 $1.93 $218.9K $0 7 2026-06-09
AVEDRO INC (AVDR) Delisted Director — $24.25 — $0 2 2019-06-18

Recent Filings

142 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
2026-06-29 GKOS Tax (F) −4,059 -$578.7K EDGAR
2026-06-09 LUNG Grant (A) +40,000 $0 EDGAR
2026-04-03 GKOS Mixed −9,937 -$1.09M EDGAR
2026-03-27 GKOS Grant (A) +23,564 $0 EDGAR
2026-03-25 GKOS Tax (F) −2,744 -$288.8K EDGAR
2026-03-19 GKOS Tax (F) −2,801 -$277.1K EDGAR
2026-03-17 GKOS Tax (F) −5,212 -$505.7K EDGAR
2026-03-09 GKOS Tax (F) −1,098 -$123.1K EDGAR
2026-02-26 GKOS Tax (F) −4,059 -$483.7K EDGAR
2026-02-10 GKOS Mixed +166,000 $5.13M EDGAR
Showing 1–10 of 142
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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.