Thomas James Gunderson
CIK 1708144 · View on SEC EDGAR ↗
Insider
First SEC filing: May 1, 2019 · Latest: June 4, 2019
On this page
Insider at
Insider transactions
0 buys (P)
1 sells (S)
Net:
$-722,377
+ 23 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
23 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| June 15, 2026 | TMDX | S | 9,624 | $75.06 | $722,377 | 16,642 Direct | -36.64% | Disposed | 24.8% (price as of 2026-08-20) |
| March 4, 2024 | MMSI | S | 18,157 | $76.03 | $1,380,477 | 19,257 Direct | -48.53% | Disposed | 20.7% (price as of 2026-08-20) |
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 15, 2026 | TMDX | Stock Option (Right to Buy) | Common Stock (19,285) | $2.21 | Aug. 1, 2026 | 19,285 | Disposed |
| May 23, 2024 | TMDX | Stock Option (Right to Buy) | Common Stock (1,154) | $137.53 | May 23, 2034 | 1,154 | Acquired |
| March 4, 2024 | MMSI | Non-qualified stock options (right to buy) | Common Stock (25,000) | $34.40 | May 24, 2024 | 25,000 | Disposed |
| May 25, 2023 | TMDX | Stock Option (Right to Buy) | Common Stock (1,916) | $71.33 | May 25, 2023 | 1,916 | Acquired |
| June 1, 2022 | TMDX | Stock Option (Right to Buy) | Common Stock (13,500) | $28.12 | June 1, 2032 | 13,500 | Acquired |
| May 27, 2021 | TMDX | Stock Option (Right to Buy) | Common Stock (13,500) | $26.26 | May 27, 2031 | 13,500 | Acquired |
| June 22, 2020 | MMSI | Restricted Stock Unit | Common Stock (4,188) | — | June 22, 2021 | 4,188 | Acquired |
| June 4, 2020 | TMDX | Stock Option (Right to Buy) | Common Stock (15,934) | $14.20 | June 4, 2030 | 15,934 | Acquired |
| May 31, 2019 | MMSI | Non-qualified stock options (right to buy) | Common Stock (7,500) | $52.17 | May 31, 2026 | 7,500 | Acquired |
| May 24, 2019 | MMSI | Non-qualified stock options (right to buy) | Common Stock (13,750) | $52.17 | May 24, 2026 | 13,750 | Acquired |
| May 6, 2019 | TMDX | Stock Option (Right to Buy) | Common Stock (19,285) | $2.21 | Aug. 1, 2026 | 19,285 | Acquired |
| May 6, 2019 | TMDX | Stock Option (Right to Buy) | Common Stock (19,285) | $0.63 | Aug. 1, 2026 | 67,500 | Disposed |
| June 7, 2018 | MMSI | Common Stock | Common Stock (25,000) | $50.50 | June 7, 2025 | 25,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 2 holdings
Securities held when first becoming an insider, per SEC Form 3.