| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
See Remarks | Former 10% Owner | 10% Owner +4 more
7 companies
Tompkins Mark N. serves as a Former Director at GUER and has filed Form 4s across 7 companies. Across recent SEC filings that breaks down to 7 buys and 104 sells. Those positions are worth an estimated $42.2M at current prices.
Historically, Tompkins Mark N.'s trades have earned a strong insider score of 86/100 across 74 rated trades. Over a 12-month horizon, 100.0% of those trades were profitable, with an average 12-month return of +66.7%.
The biggest single holding is ALMU (~$26.2M) as Former 10% Owner. The recent filings there lean toward selling, a net 684,092 shares.
| Date | Ticker | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| Feb 4, 2026 | ALMU Aeluma, Inc. | Former 10% Owner | Sell | 34,500 | $14.71 | $507,653.44 | -1.9% | +85.5% | - | |
| Feb 2, 2026 | ALMU Aeluma, Inc. | 10% Owner | Sell | 95,000 | $16.15 | $1,534,584.51 | -4.9% | +44.9% | - | |
| Jan 22, 2026 | ALMU Aeluma, Inc. | 10% Owner | Sell | 105,000 | $19.14 | $2,009,666.74 | -5.2% | +20.1% | - | |
| Dec 26, 2025 | ALMU Aeluma, Inc. | 10% Owner | Sell | 60,000 | $16.62 | $997,444.56 | -2.9% | -29.2% | - | |
| Dec 22, 2025 | ALMU Aeluma, Inc. | 10% Owner | Sell | 85,000 | $14.68 | $1,247,450.00 | -3.9% | -12.7% | - | |
| Dec 10, 2025 | ALMU Aeluma, Inc. | 10% Owner | Sell | 50,000 | $17.09 | $854,323.13 | -2.3% | -9.9% | - | |
| Dec 8, 2025 | ALMU Aeluma, Inc. | 10% Owner | Sell | 100,000 | $16.08 | $1,607,595.74 | -4.3% | -4.4% | - | |
| Oct 20, 2025 | ALMU Aeluma, Inc. | 10% Owner | Sell | 77,500 | $16.67 | $1,291,919.36 | -3.2% | +26.1% | -52.9% | |
| Oct 16, 2025 | ALMU Aeluma, Inc. | 10% Owner | Sell | 65,000 | $20.09 | $1,305,674.60 | -2.6% | +14.6% | -57.6% | |
| Oct 14, 2025 | ALMU Aeluma, Inc. | 10% Owner | Sell | 107,186 | $17.87 | $1,915,158.65 | -4.2% | +15.1% | -53.8% |