Every "stocks insiders are buying" list is only as good as its filters. A raw dump of Form 4 filings includes grants, gifts, and option exercises that mean nothing. What you want is open-market purchases: insiders spending their own money. That is exactly what a ceo buying own stock screener filters for.
The logic is basic. Filter for transaction code P, drop anything under a meaningful dollar threshold, and sort by number of distinct buyers. CEOs matter most, then CFOs, then directors. A CEO buying $1M of her own stock is the single strongest line item in insider data.
Watch the filing lag too. A buy disclosed the next day hits different from one filed weeks late. Fresh filings mean the market hasn't fully priced the signal yet, which is the whole point of tracking this stuff.
Also note who isn't buying. If the CEO buys but the CFO and the rest of the C-suite sit out, ask why. Cluster buys work because conviction is contagious inside a company. A lone buyer is a weaker signal than a quiet consensus.
Read the list with filters on. Raw data without filters is just noise with a ticker attached.