As of September 29, 2026, the three largest insider holders of ALTO are Bryon T Mcgregor (President Ceo, 957.88K shares), Gilbert E Nathan (Director, 866.39K shares), Michael D Kandris (President, Ceo Coo, 666.26K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Bryon T Mcgregor | President Ceo | 957,882 | 0 | 957,882 | 19.6% | 03 Apr, 2026 |
| 2 | Gilbert E Nathan | Director | 866,393 | 0 | 866,393 | 17.7% | 14 Sep, 2026 |
| 3 | Michael D Kandris | President, Ceo Coo | 666,264 | 0 | 666,264 | 13.6% | 24 Jun, 2024 |
| 4 | James R Sneed | Chief Commercial Officer | 440,926 | 0 | 440,926 | 9.0% | 03 Apr, 2026 |
| 5 | Douglas L Kieta | Director | 315,828 | 0 | 315,828 | 6.4% | 21 Jun, 2024 |
| 6 | Robert R. Olander | Chief Financial Officer | 253,086 | 0 | 253,086 | 5.2% | 03 Apr, 2026 |
| 7 | Dianne S. Nury | Director | 241,015 | 0 | 241,015 | 4.9% | 24 Jun, 2026 |
| 8 | Auste M Graham | Clo Secretary | 233,173 | 0 | 233,173 | 4.8% | 18 May, 2026 |
| 9 | William L Jones | Director | 210,353 | 0 | 210,353 | 4.3% | 27 Jun, 2022 |
| 10 | Todd E Benton | Coo | 184,130 | 0 | 184,130 | 3.8% | 03 Apr, 2026 |
| 11 | Terry L Stone | Director | 179,958 | 0 | 179,958 | 3.7% | 27 Jun, 2022 |
| 12 | Maria G Gray | Director | 179,229 | 0 | 179,229 | 3.7% | 24 Jun, 2026 |
| 13 | Christopher W Wright | Senior Vp | 72,325 | 0 | 72,325 | 1.5% | 08 Jun, 2022 |
| 14 | Alan Robert Tank | Director | 60,271 | 0 | 60,271 | 1.2% | 24 Jun, 2026 |
| 15 | Jeremy Bezdek | Director | 36,666 | 0 | 36,666 | 0.7% | 09 Jul, 2025 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 11 Aug, 2026 | Gilbert E Nathan | Director | Acquired P | 50,000 | $4.15 | $207.50K | 856,393 | Direct |
| 23 Jun, 2026 | Gilbert E Nathan | Director | Acquired A | 31,652 | $0.00 | $0 | 806,393 | Direct |
| 23 Jun, 2026 | Alan Robert Tank | Director | Acquired A | 23,605 | $0.00 | $0 | 60,271 | Direct |
| 23 Jun, 2026 | Dianne S. Nury | Director | Acquired A | 23,605 | $0.00 | $0 | 241,015 | Direct |
| 23 Jun, 2026 | Maria G Gray | Director | Acquired A | 23,605 | $0.00 | $0 | 179,229 | Direct |
| 14 May, 2026 | Auste M Graham | Clo Secretary | Disposed G | 20,000 | $0.00 | $0 | 233,173 | Direct |
| 12 May, 2026 | Gilbert E Nathan | Director | Acquired P | 20,000 | $4.61 | $92.20K | 769,741 | Direct |
| 13 May, 2026 | Gilbert E Nathan | Director | Acquired P | 5,000 | $4.45 | $22.25K | 774,741 | Direct |
| 01 Apr, 2026 | James R Sneed | Chief Commercial Officer | Disposed F | 22,265 | $4.79 | $106.65K | 440,926 | Direct |
| 01 Apr, 2026 | Auste M Graham | Clo Secretary | Disposed F | 32,902 | $4.79 | $157.60K | 253,173 | Direct |
| 01 Apr, 2026 | Bryon T Mcgregor | President Ceo | Disposed F | 73,062 | $4.79 | $349.97K | 957,882 | Direct |
| 01 Apr, 2026 | Todd E Benton | Coo | Disposed F | 25,359 | $4.79 | $121.47K | 184,130 | Direct |
| 01 Apr, 2026 | Robert R. Olander | Chief Financial Officer | Disposed F | 41,072 | $4.79 | $196.73K | 253,086 | Direct |
| 17 Mar, 2026 | Bryon T Mcgregor | President Ceo | Acquired A | 100,108 | $0.00 | $0 | 1,030,944 | Direct |
| 17 Mar, 2026 | Auste M Graham | Clo Secretary | Acquired A | 30,794 | $0.00 | $0 | 286,075 | Direct |
| 17 Mar, 2026 | Robert R. Olander | Chief Financial Officer | Acquired A | 35,730 | $0.00 | $0 | 294,158 | Direct |
| 17 Mar, 2026 | James R Sneed | Chief Commercial Officer | Acquired A | 30,794 | $0.00 | $0 | 463,191 | Direct |
| 17 Mar, 2026 | Todd E Benton | Coo | Acquired A | 35,730 | $0.00 | $0 | 209,489 | Direct |
| 13 Aug, 2025 | James R Sneed | Chief Commercial Officer | Acquired P | 3,176 | $1.06 | $3.36K | 432,397 | Direct |
| 09 Jul, 2025 | Gilbert E Nathan | Director | Acquired A | 49,166 | $0.00 | $0 | 749,741 | Direct |