Frank Giustra bought $317k of STEX
owner at BioSig Technologies, Inc.. 100,000 shares at an average of $3.17, traded Feb 4, 2026, filed Feb 4, 2026.
Score components
- +12Role10% owner
- +14Trade size$317k at market
- +3Relative to holdingsHoldings up 8%
- +8Price context73% below the 52-week high
- +15Cluster3 insiders buying within 14 days
- +5Repeat buying2 buys in 90 days
- 0Track recordToo few past buys to judge (0 with prices)
- -5Outside holderA 10% owner who is not an officer or director
What happened after comparable buys
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
This signal so far: 1m -36.5%, 3m -67.8%, 6m -76.9%.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001493152-26-005165, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Feb 4, 2026 | POpen-market purchase Common Stockindirect: Frank Giustra 2018 SSAS | +100,000 | $3.17 | $317k | 1,278,205 | Feb 4, 2026 |
Related signals
Other insiders at BioSig Technologies, Inc. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| Pro nowfree Oct 14, 2026 | BioSig Technologies, Inc. | Christine Marie Plummer Chief Financial Officer | $7,175 13,344 shares | -3% | |
| Pro nowfree Oct 14, 2026 | BioSig Technologies, Inc. | Mitchell Young Williams Chief Investment Officer | $35k 65,538 shares | -2% | |
| 22Weak | STEXsell BioSig Technologies, Inc. | Mitchell Young Williams Chief Investment Officer | $52k 72,689 shares | -2% | |
| 38Weak | STEXbuy BioSig Technologies, Inc. | Morgan Lee Lekstrom Interim Executive Chairman | $50k 50,000 shares | +16% | |
| 15Weak | STEXsell BioSig Technologies, Inc. | Mitchell Young Williams Chief Investment Officer | $25k 23,810 shares | -1% | |
| 46Moderate | BioSig Technologies, Inc. | Morgan Lee Lekstrom Interim Executive Chairman | $50k 34,000 shares | +12% | |
| 64Notable | BioSig Technologies, Inc. | Morgan Lee Lekstrom Interim Executive Chairman | $147k 47,000 shares | +671% | |
| 34Weak | BioSig Technologies, Inc. | Anthony Mark Marciano director | $20k 17,745 shares | +18% | |
| 52Moderate | BioSig Technologies, Inc. | Morgan Lee Lekstrom Interim Executive Chairman | $153k 147,000 shares | +120% | |
| 27Weak | STEXsell BioSig Technologies, Inc. | Mitchell Young Williams Chief Investment Officer | $210k 263,863 shares | -8% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.