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Matthijs Glastra

CIK 1561438 · Chief Executive Officer · last filed 2026-07-07

Matthijs Glastra is a Chief Executive Officer who has filed 121 SEC Form 4 insider transactions across 4 companies since 2012. The most recent filing shows the insider sold $1.0M of NOVT on Jul 7, 2026. Across all open-market trades the lifetime net is −$38.2M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $18.9M across reported positions. 119 SEC filings were submitted jointly with GSI GROUP INC.

"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

$18.87M

Companies

4

Total Filings

121

Lifetime Open-Market Net

-$38.18M

Filer Profile

Reported Address
C/O GSI GROUP CORPORATION
125 MIDDLESEX TURNPIKE
BEDFORD, MA 01730
Related Filers
GSI GROUP INC — 119 joint filings, latest 2026-07-07
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
NOVT Chief Executive Officer 87,619 $146.56 $12.84M -$29.43M 70 2026-07-07
NOVTU Chief Executive Officer 91,043 $61.64 $5.61M -$8.68M 14 2026-06-04
IEX Director 1,880 $224.21 $421.5K $0 3 2026-05-08
NOVANTA INC (GSIG) Delisted Chief Operating Officer 61,014 $47.22 $2.88M -$70.0K 15 2016-04-01

Recent Filings

121 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
2026-07-07 NOVT Sell (S) −6,500 -$1.05M EDGAR
2026-07-02 NOVT Notice (144) −6,500 -$1.05M EDGAR
2026-06-04 NOVTU Sell (S) −6,500 -$1.10M EDGAR
2026-06-02 NOVT Notice (144/A) −6,500 -$1.10M EDGAR
2026-06-02 NOVT Notice (144) −7,500 -$1.12M EDGAR
2026-05-14 NOVTU Sell (S) −7,500 -$1.13M EDGAR
2026-05-12 NOVT Notice (144) −7,500 -$1.12M EDGAR
2026-05-08 IEX Grant (A) +805 $0 EDGAR
2026-05-07 NOVTU Sell (S) −6,500 -$852.3K EDGAR
2026-05-05 NOVT Notice (144) −6,500 -$845.0K EDGAR
Showing 1–10 of 121
Page 1 of 13
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.