Worth a closer look
- Open-market purchase with their own money (Form 4 code P), not a grant or option exercise.
- Their past buys: 8 of 15 beat the S&P 500 over 90 days.
Reasons for caution
- Bought by a 10% owner or investment firm, whose reasons often differ from an executive's.
- Held indirectly (a trust, fund or family entity), so the economic owner isn't only the named insider.
- Small next to what they already own (holding up 0.7%).
- Similar past buys beat the S&P 500 only 43% of the time (670 cases); the typical one trailed it by 2.9%.
What happened after this filing
Insider Twins: past buys with the same traits
1 insider buying · no CEO or CFO · $1M+ · stock up over 3 months
GME Dec 21, 2020 +1183.4% vs S&PAEVA Mar 31, 2025 +410.2% vs S&PHYMC Oct 16, 2025 +282.5% vs S&PFULC Jan 24, 2023 -82.8% vs S&PFULC Jan 6, 2023 -80.3% vs S&PFWRD Feb 17, 2026 -77.3% vs S&PWhat we couldn't check
- Why they traded. Filings don't say, and we don't guess.
- Company news after the filing, and any private terms.
Berkshire Hathaway Inc (a 10% owner) bought $27M of SIRI at about $29.10 between Oct 30, 2026 and Nov 3, 2026, reported to the SEC on Nov 3, 2026. Buys like this beat the S&P 500 43% of the time since 2020, against 46% for all insider buys. We found 2 points that make it worth a closer look and 4 reasons for caution. History, not a prediction.
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Written by fixed rules from SEC filings and our measured history, not by an AI model. Public data only. History, not a prediction, and not investment advice.