Kate Rock

All filings by Kate Rock on record concern Costain Group PLC. Over a trading history stretching from 21 December 2022 to 31 March 2026, the count stands at 5 filings.

Purchases make up the whole of the open-market record (5 purchases, €116k). A purchase on the market is a deliberate choice to commit personal money, which is why it draws more attention than a grant. So far in 2026, the count stands at 1 purchase and no sales.

The median purchase comes to €22k. On 1 out of 5 purchases, another insider of the same company was buying within the same 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. For 4 purchases whose 90-day window has closed, the share price was higher on day 90 than the day after publication in 100% of cases, with a median move of +11.2%. Past outcomes like these are no guarantee of what comes next.

Most recently, on 1 April 2026, the filings show an open-market purchase worth €21k in Costain Group PLC. Typically, a trade is published a median of 1 day after it takes place. The regulation allows three business days to notify a trade (UK MAR). These figures are compiled from regulatory filings published by RNS (LSE). They describe what insiders did and are not a recommendation.