InsidersTradesSigma
Total declarations
Companies
▲ Purchases (0 ops.)
▼ Sales (0 ops.)
Insider track record
ExecutiveDisclosed buys
0
Disclosed sells
0
Not enough buy signals with a settled T+90 horizon to measure a track record yet.
Signal history
No signal scores available.
Discover the full record of transactions filed by Kostelnik Robert J., Directeur. Director active across 2 companies, notably HollyFrontier Corp. In total, 5 disclosures have been logged. History available since 10 November 2021. The latest transaction was disclosed on 12 November 2025 (Attribution). Regulator: SEC (Form 4). All data is accessible without signup.
Companies and markets linked to Kostelnik Robert J.
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Declarations5 total
2,943 shares0Common StockSEC:0001193125-25-280370:0
3,772 shares0Common StockSEC:0000950170-24-127334:0
3,005 shares0Common StockSEC:0001209191-23-054873:0
2,643 shares0Common StockSEC:0001209191-22-056297:0
4,180 shares0Common StockSEC:0001209191-21-063972:0
5 of 5 declarations
About Kostelnik Robert J.
Robert J. Kostelnik is a Director at HollyFrontier Corp. In this role, he contributes to the governance of the company and to strategic decision-making. His expertise in the oil and gas industry allows him to provide valuable insights into the challenges and opportunities in the sector. He is involved in various committees within the board of directors.
