Worth a closer look
- Open-market purchase with their own money (Form 4 code P), not a grant or option exercise.
- Raised their own holding by 163%.
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.
- Similar past buys beat the S&P 500 only 43% of the time (248 cases); the typical one trailed it by 2.3%.
What happened after this filing
Insider Twins: past buys with the same traits
2 insiders buying · no CEO or CFO · $1M+ · stock up over 3 months
HYMC Nov 19, 2025 +209.8% vs S&PKOD Sep 25, 2020 +151.3% vs S&PHYMC Dec 18, 2025 +137.9% vs S&PEAF May 20, 2024 -67.8% vs S&PMRKR Dec 26, 2024 -60.4% vs S&PIMA Jul 30, 2025 -51.7% 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.
Arch Venture Partners IX, LLC (a 10% owner) bought $25M of LYEL at about $10.77 on Nov 4, 2026, reported to the SEC on Nov 5, 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 3 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.