InsidersTradesSigma
Total declarations
Company
▲ Purchases (1 ops.)
▼ Sales (0 ops.)
Insider track record
ExecutiveDisclosed buys
1
Disclosed sells
0
T+90 hit rate
100%
T+90 mean return
+0.4%
Across 1 buy signal with a settled T+90 return. Return basis: close on the day after publication.
Signal history
No signal scores available.
Browse the complete record of transactions filed by Stonesifer Sandra M., Vice-Présidente, Responsable des Ressources Humaines. Insider active across 1 company, notably Graham Holdings Co. Aggregated, 3 filings have been recorded. Breakdown: 1 buy · 0 sell. Total volume traded: €10k. History available since 30 December 2021. The latest transaction was disclosed on 2 January 2025 (Attribution). Regulator: SEC (Form 4). All data is openly available.
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Declarations3 total
401 shares0Class B Common StockSEC:0000104889-25-000006:0
525 shares0Class B Common StockSEC:0000104889-23-000011:0
20 shares@ US$591.990.0002% mcap50.0% of flowClass B Common StockSEC:0000104889-22-000006:0
Canonical exit: 30 Mar 2022 (T+90)
3 of 3 declarations
About Stonesifer Sandra M.
Sandra M. Stonesifer serves as Vice President and Chief Human Resources Officer at Graham Holdings Co. She manages all human resources functions, including recruitment, training, and employee development. Her role is essential in promoting a positive corporate culture and aligning human resources strategies with the company's objectives.
