ITS
InsiderTrading
TradesInsidersCompaniesCluster BuysRankingsAbout
ITS
InsiderTrading Screener

Track SEC Form 4 insider trades. See what corporate insiders are buying and selling.

Browse

  • Trades
  • Insiders
  • Companies
  • Cluster Buys
  • Rankings

Top Insiders

  • Mark Zuckerberg
  • Elon Musk
  • Jamie Dimon
  • Satya Nadella
  • Lisa Su
  • Jensen Huang

Screeners

  • CEO & CFO Purchases
  • Director Purchases
  • Top Buys This Week
  • Top Sales This Week
  • 10b5-1 Trades
  • Buy/Sell Ratios
  • Politician Overlap
  • Sectors

Learn

  • Learn
  • What is a Form 4?
  • About & Methodology
  • What are Cluster Buys?
  • Top Insider Rankings
  • Contact Us
  • Privacy Policy
  • Terms of Use

Data

  • SEC EDGAR Form 4 ↗
  • CongressStock.com ↗
  • Track13F.com ↗
  • About the data
© 2026 InsiderTradingScreener.com. Data from SEC EDGAR Form 4 filings.For informational purposes only. Not financial advice.
Home/Insiders/Kastelein Johannes Jacob Pieter

Kastelein Johannes Jacob Pieter

Officer

Officer
Total trades
18
Bought (open market)
$0
Sold (open market)
$20.8M
Tickers traded
1

12-month activity

Monthly buy vs sell totals from Kastelein Johannes Jacob Pieter's Form 4 filings.

BuysSells
Show data table
MonthBuysSellsFilings
October 2025$0$00
November 2025$0$00
December 2025$0$00
January 2026$0$200K3
February 2026$0$1.6M2
March 2026$0$9.1M6
April 2026$0$00
May 2026$0$00
June 2026$0$00
July 2026$0$00
August 2026$0$3.4M2
September 2026$0$00

Recent trades

Most recent Form 4 filings by Kastelein Johannes Jacob Pieter.

  • Kastelein Johannes Jacob Pietersold125,000 shares ofNAMSat $26.91$3.4MAug 24 · filed Aug 25Details
  • Kastelein Johannes Jacob Pieterexercised125,000 shares ofNAMSAug 24 · filed Aug 25Details
  • Kastelein Johannes Jacob Pietersold101,409 shares ofNAMSat $30.29$3.1MMar 9Details

Explore insider screeners

Latest CEO & CFO PurchasesLatest CEO & CFO SalesDirector PurchasesOfficer PurchasesTop Purchases This WeekTop Sales This WeekTop Officer Buys (Month)10% Owner Filings10b5-1 Planned TradesDiscretionary TradesBuy/Sell RatiosPolitician-Insider Overlap
  • Kastelein Johannes Jacob Pieterexercised101,409 shares ofNAMSMar 9Details
  • Kastelein Johannes Jacob Pietersold94,124 shares ofNAMSat $30.32$2.9MMar 6 · filed Mar 9Details
  • Kastelein Johannes Jacob Pieterexercised94,124 shares ofNAMSMar 6 · filed Mar 9Details
  • Kastelein Johannes Jacob Pietersold104,467 shares ofNAMSat $30.3$3.2MMar 5 · filed Mar 9Details
  • Kastelein Johannes Jacob Pieterexercised104,467 shares ofNAMSMar 5 · filed Mar 9Details
  • Kastelein Johannes Jacob Pietersold14,692 shares ofNAMSat $35$514KFeb 20 · filed Feb 24Details
  • Kastelein Johannes Jacob Pietersold30,789 shares ofNAMSat $35.46$1.1MFeb 20 · filed Feb 24Details
  • Kastelein Johannes Jacob Pietergranted115,000 shares ofNAMSat $0Jan 7Details
  • Kastelein Johannes Jacob Pietergranted25,500 shares ofNAMSJan 7Details
  • Kastelein Johannes Jacob Pietersold6,000 shares ofNAMSat $33.25$200KJan 5 · filed Jan 7Details
  • Kastelein Johannes Jacob Pietersold7,658 shares ofNAMSat $25.49$195KAug 22, 2025 · filed Aug 25, 2025Details
  • Kastelein Johannes Jacob Pietersold42,342 shares ofNAMSat $25.08$1.1MAug 22, 2025 · filed Aug 25, 2025Details
  • Kastelein Johannes Jacob Pietersold50,000 shares ofNAMSat $24.29$1.2MAug 21, 2025 · filed Aug 25, 2025Details
  • Kastelein Johannes Jacob Pietersold190,476 shares ofNAMSat $21.5$4.1MMar 26, 2024 · filed Mar 27, 2024Details
  • Kastelein Johannes Jacob Pietertax-withheld11,197 shares ofNAMSat $22.72$254KMar 26, 2024 · filed Mar 27, 2024Details
  • Kastelein Johannes Jacob Pieterexercised201,673 shares ofNAMSMar 26, 2024 · filed Mar 27, 2024Details
  • Kastelein Johannes Jacob Pietergranted500,000 shares ofNAMSat $0Jan 1, 2024 · filed Jan 3, 2024Details