Tarnok Michael P.
Insider
First SEC filing: Feb. 13, 2019 · Latest: Feb. 13, 2019
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| June 20, 2025 | DYAI | M | 10,776 | · | · | 281,033 Direct | +3.99% | Acquired | (price as of 2026-10-05) |
| June 20, 2025 | DYAI | M | 10,776 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Jan. 2, 2025 | DYAI | M | 23,585 | · | · | 270,257 Direct | +9.56% | Acquired | (price as of 2026-10-05) |
| Jan. 2, 2025 | DYAI | M | 23,585 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Jan. 2, 2025 | DYAI | A | 25,000 | · | · | 25,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Jan. 2, 2025 | DYAI | A | 10,776 | · | · | 10,776 Direct | · | Acquired | (price as of 2026-10-05) |
| Nov. 22, 2024 | DYAI | M | 6,250 | $0.97 | $6,062 | 227,922 Direct | +2.82% | Acquired | -53.2% (price as of 2026-10-05) |
| Nov. 22, 2024 | DYAI | M | 18,750 | $0.97 | $18,188 | 246,672 Direct | +8.23% | Acquired | -53.2% (price as of 2026-10-05) |
| Nov. 22, 2024 | DYAI | M | 6,250 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Nov. 22, 2024 | DYAI | M | 18,750 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| May 21, 2024 | DYAI | M | 7,500 | $1.36 | $10,200 | 223,603 Direct | +3.47% | Acquired | -66.6% (price as of 2026-10-05) |
| May 21, 2024 | DYAI | M | 5,625 | $1.36 | $7,650 | 229,228 Direct | +2.52% | Acquired | -66.6% (price as of 2026-10-05) |
| May 21, 2024 | DYAI | M | 16,875 | $1.36 | $22,950 | 246,103 Direct | +7.36% | Acquired | -66.6% (price as of 2026-10-05) |
| May 21, 2024 | DYAI | F | 24,431 | $1.67 | $40,800 | 221,672 Direct | -9.93% | Disposed | -72.8% (price as of 2026-10-05) |
| May 21, 2024 | DYAI | M | 7,500 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| May 21, 2024 | DYAI | M | 5,625 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| May 21, 2024 | DYAI | M | 16,875 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| April 11, 2024 | DYAI | D | 13,125 | · | · | 54,375 Direct | -19.44% | Disposed | (price as of 2026-10-05) |
| Jan. 3, 2024 | DYAI | M | 27,174 | · | · | 216,103 Direct | +14.38% | Acquired | (price as of 2026-10-05) |
| Jan. 3, 2024 | DYAI | M | 27,174 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Jan. 2, 2024 | DYAI | A | 67,500 | · | · | 67,500 Direct | · | Acquired | (price as of 2026-10-05) |
| Jan. 2, 2024 | DYAI | A | 23,585 | · | · | 23,585 Direct | · | Acquired | (price as of 2026-10-05) |
| Jan. 3, 2023 | DYAI | A | 52,500 | · | · | 52,500 Direct | · | Acquired | (price as of 2026-10-05) |
| Jan. 3, 2023 | DYAI | A | 27,174 | · | · | 27,174 Direct | · | Acquired | (price as of 2026-10-05) |
| June 10, 2022 | DYAI | A | 25,000 | · | · | 25,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Jan. 3, 2022 | DYAI | A | 52,500 | · | · | 52,500 Direct | · | Acquired | (price as of 2026-10-05) |
| Jan. 4, 2021 | DYAI | A | 52,500 | · | · | 52,500 Direct | · | Acquired | (price as of 2026-10-05) |
| Jan. 2, 2020 | DYAI | A | 75,000 | · | · | 75,000 Direct | · | Acquired | (price as of 2026-10-05) |
| June 25, 2019 | DYAI | A | 25,000 | · | · | 25,000 Direct | · | Acquired | (price as of 2026-10-05) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| June 20, 2025 | DYAI | Restricted Stock Unit | Common Stock | · | · | 10,776 | Disposed |
| Jan. 2, 2025 | DYAI | Restricted Stock Unit | Common Stock | · | · | 23,585 | Disposed |
| Jan. 2, 2025 | DYAI | Stock Option | Common Stock | $1.74 | Jan. 2, 2034 | 25,000 | Acquired |
| Jan. 2, 2025 | DYAI | Restricted Stock Unit | Common Stock | · | · | 10,776 | Acquired |
| Nov. 22, 2024 | DYAI | Stock Option | Common Stock | $0.97 | Jan. 7, 2025 | 6,250 | Disposed |
| Nov. 22, 2024 | DYAI | Stock Option | Common Stock | $0.97 | Jan. 7, 2025 | 18,750 | Disposed |
| May 21, 2024 | DYAI | Stock Option | Common Stock | $1.36 | June 11, 2024 | 7,500 | Disposed |
| May 21, 2024 | DYAI | Stock Option | Common Stock | $1.36 | June 11, 2024 | 5,625 | Disposed |
| May 21, 2024 | DYAI | Stock Option | Common Stock | $1.36 | June 11, 2024 | 16,875 | Disposed |
| April 11, 2024 | DYAI | Stock Option | Common Stock | $1.59 | Jan. 2, 2034 | 13,125 | Disposed |
| Jan. 3, 2024 | DYAI | Restricted Stock Unit | Common Stock | · | · | 27,174 | Disposed |
| Jan. 2, 2024 | DYAI | Stock Option | Common Stock | $1.59 | Jan. 2, 2034 | 67,500 | Acquired |
| Jan. 2, 2024 | DYAI | Restricted Stock Unit | Common Stock | · | · | 23,585 | Acquired |
| Jan. 3, 2023 | DYAI | Stock Option | Common Stock | $1.38 | Jan. 2, 2033 | 52,500 | Acquired |
| Jan. 3, 2023 | DYAI | Restricted Stock Unit | Common Stock | · | · | 27,174 | Acquired |
| June 10, 2022 | DYAI | Stock Option | Common Stock | $2.60 | June 9, 2032 | 25,000 | Acquired |
| Jan. 3, 2022 | DYAI | Stock Option | Common Stock | $4.81 | Jan. 2, 2032 | 52,500 | Acquired |
| Jan. 4, 2021 | DYAI | Stock Option | Common Stock | $5.16 | Jan. 3, 2031 | 52,500 | Acquired |
| Jan. 2, 2020 | DYAI | Stock Option | Common Stock | $5.27 | Jan. 1, 2030 | 75,000 | Acquired |
| June 25, 2019 | DYAI | Stock Option | Common Stock | $5.83 | June 24, 2029 | 25,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 31 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Feb. 13, 2019 | DYAI | Common Stock | 188,929 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 12,500 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 9,375 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 9,375 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 9,375 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 9,375 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 12,500 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 9,375 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 9,375 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 9,375 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 9,375 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 12,500 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 9,375 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 9,375 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 9,375 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 9,375 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 7,500 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 5,625 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 16,875 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 6,250 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 18,750 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 6,250 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 4,688 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 4,687 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 4,688 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 4,687 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 6,250 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 4,688 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 4,687 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 4,688 | Direct |
| Feb. 13, 2019 | DYAI | Stock Option | 4,687 | Direct |