Arthur H. Amron

This profile gathers the share dealings of Arthur H. Amron across 3 companies, led by Mammoth Energy Services, Inc., Nephros Inc and Rhino Resource Partners LP. Between 31 December 2015 and 14 September 2026, the trades on record add up to 35 filings.

No open-market sale appears; the market trades are 10 purchases worth €84k. A purchase on the market is a deliberate choice to commit personal money, which is why it draws more attention than a grant. Other entries cover 19 share grants. Since January 2026: 4 purchases and no sales on the market.

Half of the purchases are above €6,957 and half below. Clusters matter here: 1 out of 10 purchases overlapped with buying by a colleague within 30 days. A cluster is several different insiders buying the same stock within a short window, a pattern studied more closely than a single purchase. Looking at 5 purchases old enough to measure, the stock rose over the following 90 days in 40% of cases; the median change was -6.0%. This is a record of the past, not a forecast.

On 16 September 2026 came the latest disclosure, a transaction in Nephros Inc. The latest purchase dates back some time: it was published 128 days ago, on 15 June 2026. Filings reach the SEC (Form 4) feed a median of 2 days after the trade. Section 16 rules allow two business days to file each Form 4. These figures are compiled from regulatory filings published by SEC (Form 4). They describe what insiders did and are not a recommendation.