Joseph T. Martinko

Insider activity · 24 months1 buy0 salesCumulative net flow

Nov 24 · 0 buys · 0 salesDec 24 · 0 buys · 0 salesJan 25 · 0 buys · 0 salesFeb 25 · 0 buys · 0 salesMar 25 · 0 buys · 0 salesApr 25 · 0 buys · 0 salesMay 25 · 0 buys · 0 salesJun 25 · 0 buys · 0 salesJul 25 · 0 buys · 0 salesAug 25 · 0 buys · 0 salesSept 25 · 0 buys · 0 salesOct 25 · 0 buys · 0 salesNov 25 · 0 buys · 0 salesDec 25 · 0 buys · 0 salesJan 26 · 0 buys · 0 salesFeb 26 · 0 buys · 0 salesMar 26 · 0 buys · 0 salesApr 26 · 0 buys · 0 salesMay 26 · 0 buys · 0 salesJun 26 · 0 buys · 0 salesJul 26 · 0 buys · 0 salesAug 26 · 1 buy · 0 salesSept 26 · 0 buys · 0 salesOct 26 · 0 buys · 0 sales

Total declarations

Company

▲ Purchases (1 ops.)

€26k

▼ Sales (0 ops.)

—

Latest filing published 11 Aug 2026 for Chemours Co, €26k.

Filing timeline

BuySale

Joseph T. Martinko

Insider track record

Disclosed buys

Disclosed sells

Not enough buy signals with a settled T+90 horizon to measure a track record yet.

Signal history

Joseph T. Martinko: trading record in brief

Joseph T. Martinko appears in our data through filings on Chemours Co shares, published by SEC (Form 4). Over a trading history stretching from 1 August 2023 to 7 August 2026, the count stands at 11 filings.

Every open-market trade on record is a purchase: 1 purchase worth €26k, and no sale. Buying on the open market means paying the going price with one's own funds, a different act from receiving shares as pay. The rest of the record consists of 10 share grants. Since January 2026: 1 purchase and no sales on the market.

Most recently, on 11 August 2026, the filings show an open-market purchase worth €26k in Chemours Co. Between a trade and the moment it shows up on SEC (Form 4), the median delay is 3 days. The legal deadline for a Form 4 is two business days after the transaction. Every figure here comes from the filings published by SEC (Form 4) and describes the past, not future prices; it is not investment advice.