Insider Buying This Week: A Three-Day Streak, a Director's Small Add, and a Fund Building a Stake

Three Form 4 filings from this week illustrate three different shapes open-market insider buying can take — a multi-day executive buying streak, a small routine director purchase, and a large institutional stake build. All figures below are taken directly from the filings.

Navios Maritime Partners (NMM): three consecutive buying days

Angeliki Frangou, listed on the filing as both a director and officer of Navios Maritime Partners L.P. (ticker NMM), reported open-market purchases on three consecutive trading days:

Roughly 3,181 shares acquired across the three days at an average price just under $79. Consecutive-day open-market buying by the same insider, rather than a single lump purchase, often reflects a standing 10b5-1 purchase plan rather than a one-off decision — the filing itself doesn’t say either way, so that’s noted here as a general pattern, not a claim about this specific plan.

Landmark Bancorp (LARK): a director tops up

Mark J. Kohlrus, a director of Landmark Bancorp, filed two smaller purchases:

1,000 shares total, worth a little over $31,700 combined at the filed prices — a modest add relative to the Navios purchases above, and a good reminder that “insider buying” covers everything from routine small top-ups to large institutional moves.

Attovia Therapeutics (ATTO): a fund builds a position

Not every Form 4 purchase comes from a company officer or director. Redmile Group, LLC — an investment manager, filing as a greater-than-10% beneficial owner rather than as an officer or director — reported two same-day purchases in Attovia Therapeutics:

600,000 shares at $17.00 flat, roughly $10.2 million at the filed price. Worth flagging the distinction: this is a fund’s beneficial-ownership filing, not an executive putting personal money into the company they run — a meaningfully different signal than the Navios and Landmark Bancorp purchases above, even though all three show up under the same “Form 4” label.

All transaction data pulled directly from Form 4 filings on SEC EDGAR. Not investment advice — see About for what this site does and doesn’t do.