GLSI — Insider Trading Activity
One insider at GLSI put personal money into the stock on the open market this window, led by the CEO, with nobody selling.
What this means for GLSI
GLSI is not showing a cluster buy or a step-change versus its own baseline, so what the window amounts to is a single insider acting alone. Who is buying. The most credible buyer in this window is the company’s CEO (< $100K). That insider’s track record: past buys beat the S&P 500 5 of 11 times (avg +15% vs S&P over 6 mo). Overall credibility score: 29/100 (Low).
By the numbers. One insider filed 5 open-market purchases at GLSI over the window, 7,300 shares in all at an average of $13.29 a share, most recently on July 29, 2026. No insider sold GLSI stock on the open market in that period.
How we read these filings — which transaction codes count, how the cluster and credibility thresholds are set, and what the signals have and haven’t predicted — is written up in the insider trading methodology.
GLSI insider filings, one by one
All 5 Form 4 filings from the last 90 days, by insider, with share count, dollar amount and date.
Other tickers with the same signal
Companies of a comparable size whose Form 4 filings tripped the same insider buying flag as GLSI in this window.
- AGPU insider trading — 1 buyer, credibility 20/100
- ANNX insider trading — 1 buyer, credibility 33/100
- CMC insider trading — 1 buyer, credibility 20/100
- HCWB insider trading — 3 buyers, credibility 31/100
- DRIO insider trading — 1 buyer, credibility 21/100