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 13%.
- Their first purchase here in our data, after 1 sale.
- 6 different insiders bought in the last 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.
- Similar past buys beat the S&P 500 only 43% of the time (110 cases); the typical one trailed it by 2.5%.
- Their past buys: only 1 of 4 beat the S&P 500.
- Reported 1 business day after the SEC's 2-day deadline.
What happened after this filing
Insider Twins: past buys with the same traits
3+ insiders buying · no CEO or CFO · $1M+ · stock up over 3 months
ALMS Dec 1, 2025 +302.8% vs S&PORGO Dec 3, 2020 +189.2% vs S&PIMVT Oct 7, 2022 +101.2% vs S&PPLCE Feb 16, 2024 -63.4% vs S&PNYC Apr 27, 2022 -62.0% vs S&PONMD Nov 26, 2025 -56.8% 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.
RTW Investments, LP (a 10% owner) bought $6.0M of OBIO at about $5.00 on Nov 9, 2026, reported to the SEC on Nov 12, 2026. Buys like this beat the S&P 500 43% of the time since 2020, against 46% for all insider buys. We found 4 points that make it worth a closer look and 5 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.