Donald W Landry
CIK 1563616 · View on SEC EDGAR ↗
Insider
First SEC filing: April 27, 2026 · Latest: April 27, 2026
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 29 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
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| April 23, 2026 | SXT | F | 674 | $99.23 | $66,881 | 10,447 Direct | -6.06% | Disposed | 34.4% (price as of 2026-08-21) |
| April 23, 2026 | SXT | A | 1,119 | — | — | 11,121 Direct | +11.19% | Acquired | (price as of 2026-08-21) |
| April 24, 2025 | SXT | F | 619 | $80.14 | $49,607 | 9,841 Direct | -5.92% | Disposed | 66.4% (price as of 2026-08-21) |
| April 24, 2025 | SXT | A | 1,386 | — | — | 10,460 Direct | +15.27% | Acquired | (price as of 2026-08-21) |
| April 25, 2024 | SXT | F | 271 | $69.64 | $18,872 | 8,879 Direct | -2.96% | Disposed | 91.5% (price as of 2026-08-21) |
| April 25, 2024 | SXT | A | 1,436 | — | — | 9,150 Direct | +18.62% | Acquired | (price as of 2026-08-21) |
| April 27, 2023 | SXT | A | 1,222 | — | — | 8,223 Direct | +17.45% | Acquired | (price as of 2026-08-21) |
| April 27, 2023 | SXT | F | 701 | $73.70 | $51,664 | 7,522 Direct | -8.52% | Disposed | 81.0% (price as of 2026-08-21) |
| April 28, 2022 | SXT | F | 591 | $84.98 | $50,223 | 6,857 Direct | -7.94% | Disposed | 56.9% (price as of 2026-08-21) |
| April 28, 2022 | SXT | A | 1,060 | — | — | 7,448 Direct | +16.59% | Acquired | (price as of 2026-08-21) |
| April 22, 2021 | SXT | F | 772 | $81.51 | $62,926 | 6,273 Direct | -10.96% | Disposed | 63.6% (price as of 2026-08-21) |
| April 22, 2021 | SXT | A | 1,105 | — | — | 7,045 Direct | +18.60% | Acquired | (price as of 2026-08-21) |
| April 23, 2020 | SXT | F | 612 | $44.10 | $26,989 | 5,794 Direct | -9.55% | Disposed | 202.4% (price as of 2026-08-21) |
| April 23, 2020 | SXT | A | 2,041 | — | — | 6,406 Direct | +46.76% | Acquired | (price as of 2026-08-21) |
| May 6, 2019 | TNXP | A | 30,000 | — | — | 30,000 Direct | — | Acquired | (price as of 2026-08-21) |
| April 25, 2019 | SXT | F | 584 | $69.60 | $40,646 | 4,258 Direct | -12.06% | Disposed | 91.6% (price as of 2026-08-21) |
| April 25, 2019 | SXT | A | 1,282 | — | — | 4,842 Direct | +36.01% | Acquired | (price as of 2026-08-21) |
| April 26, 2018 | SXT | F | 298 | $67.90 | $20,234 | 3,487 Direct | -7.87% | Disposed | 96.4% (price as of 2026-08-21) |
| April 26, 2018 | SXT | A | 1,310 | — | — | 3,785 Direct | +52.93% | Acquired | (price as of 2026-08-21) |
| April 27, 2017 | SXT | A | 1,081 | — | — | 2,434 Direct | +79.90% | Acquired | (price as of 2026-08-21) |
| May 27, 2016 | TNXP | A | 7,500 | — | — | 7,500 Direct | — | Acquired | (price as of 2026-08-21) |
| April 21, 2016 | SXT | A | 1,333 | — | — | 1,333 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 9, 2016 | TNXP | A | 7,500 | — | — | 7,500 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 25, 2015 | TNXP | A | 6,000 | — | — | 6,000 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 25, 2015 | TNXP | A | 5,000 | — | — | 5,000 Direct | — | Acquired | (price as of 2026-08-21) |
| Oct. 29, 2014 | TNXP | A | 5,000 | — | — | 5,000 Direct | — | Acquired | (price as of 2026-08-21) |
| June 17, 2014 | TNXP | A | 5,000 | — | — | 5,000 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 11, 2014 | TNXP | A | 5,500 | — | — | 5,500 Direct | — | Acquired | (price as of 2026-08-21) |
| Feb. 12, 2013 | TNXP | A | 210,000 | — | — | 0 Direct | — | Acquired | (price as of 2026-08-21) |
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 |
|---|---|---|---|---|---|---|---|
| May 6, 2019 | TNXP | Stock Option | Common Stock (30,000) | $2.05 | May 6, 2029 | 30,000 | Acquired |
| May 27, 2016 | TNXP | Restricted Stock Unit | Common Stock (7,500) | — | — | 7,500 | Acquired |
| Feb. 9, 2016 | TNXP | Restricted Stock Unit | Common Stock (7,500) | — | — | 7,500 | Acquired |
| Feb. 25, 2015 | TNXP | Restricted Stock Unit | Common Stock (6,000) | — | — | 6,000 | Acquired |
| Feb. 25, 2015 | TNXP | Stock Option | Common Stock (5,000) | $5.95 | Feb. 25, 2025 | 5,000 | Acquired |
| Oct. 29, 2014 | TNXP | Stock Option | Common Stock (5,000) | $6.68 | Oct. 29, 2024 | 5,000 | Acquired |
| June 17, 2014 | TNXP | Stock Option | Common Stock (5,000) | $9.87 | June 17, 2024 | 5,000 | Acquired |
| Feb. 11, 2014 | TNXP | Stock Option | Common Stock (5,500) | $15.88 | Feb. 11, 2024 | 5,500 | Acquired |
| Feb. 12, 2013 | TNXP | Stock Option | Common Stock (210,000) | $0.51 | Feb. 12, 2023 | 210,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 7 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Jan. 14, 2013 | TNXP | Common Stock, Par Value $0.001 | 772,728 | Direct |
| Jan. 14, 2013 | TNXP | Common Stock, Par Value $0.001 | 649,138 | Indirect |
| Jan. 14, 2013 | TNXP | Warrants→ Common Stock (25,000) | 25,000 | Direct |
| Jan. 14, 2013 | TNXP | Warrants→ Common Stock (10,000) | 10,000 | Indirect |
| Jan. 14, 2013 | TNXP | Warrants→ Common Stock (10,000) | 10,000 | Indirect |
| Jan. 14, 2013 | TNXP | Warrants→ Common Stock (233,333) | 233,333 | Indirect |
| Jan. 14, 2013 | TNXP | Warrants→ Common Stock (233,333) | 233,333 | Indirect |