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Tiffany Olson
Insider
First SEC filing: June 12, 2026 · Latest: June 12, 2026
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
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| June 10, 2026 | MDXG | A | 50,913 | $3.64 | $185,323 | 108,510 Direct | +88.40% | Acquired | 27.2% (price as of 2026-10-05) |
| May 28, 2026 | CSTL | A | 11,766 | · | · | 11,766 Direct | · | Acquired | (price as of 2026-10-05) |
| May 22, 2026 | CSTL | M | 13,667 | · | · | 39,573 Direct | +52.76% | Acquired | (price as of 2026-10-05) |
| May 22, 2026 | CSTL | M | 13,667 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| June 18, 2025 | MDXG | A | 28,609 | $6.47 | $185,100 | 57,597 Direct | +98.69% | Acquired | -28.4% (price as of 2026-10-05) |
| May 22, 2025 | CSTL | A | 13,667 | · | · | 13,667 Direct | · | Acquired | (price as of 2026-10-05) |
| May 21, 2025 | CSTL | M | 8,673 | · | · | 25,906 Direct | +50.33% | Acquired | (price as of 2026-10-05) |
| May 21, 2025 | CSTL | M | 8,673 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| July 1, 2024 | CSTL | M | 830 | · | · | 17,233 Direct | +5.06% | Acquired | (price as of 2026-10-05) |
| July 1, 2024 | CSTL | A | 830 | · | · | 830 Direct | · | Acquired | (price as of 2026-10-05) |
| July 1, 2024 | CSTL | M | 830 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| July 1, 2024 | CSTL | A | 3,379 | · | · | 3,379 Direct | · | Acquired | (price as of 2026-10-05) |
| June 5, 2024 | MDXG | A | 28,988 | $7.26 | $210,453 | 28,988 Direct | · | Acquired | -36.2% (price as of 2026-10-05) |
| May 25, 2024 | CSTL | M | 8,636 | · | · | 16,403 Direct | +111.19% | Acquired | (price as of 2026-10-05) |
| May 25, 2024 | CSTL | M | 8,636 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| May 23, 2024 | CSTL | A | 8,673 | · | · | 8,673 Direct | · | Acquired | (price as of 2026-10-05) |
| May 10, 2024 | CSTL | M | 487 | · | · | 7,767 Direct | +6.69% | Acquired | (price as of 2026-10-05) |
| May 10, 2024 | CSTL | M | 487 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| June 2, 2023 | CSTL | M | 3,825 | · | · | 7,280 Direct | +110.71% | Acquired | (price as of 2026-10-05) |
| June 2, 2023 | CSTL | M | 3,825 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| May 25, 2023 | CSTL | A | 8,636 | · | · | 8,636 Direct | · | Acquired | (price as of 2026-10-05) |
| May 10, 2023 | CSTL | M | 487 | · | · | 3,455 Direct | +16.41% | Acquired | (price as of 2026-10-05) |
| May 10, 2023 | CSTL | M | 487 | · | · | 487 Direct | -50.00% | Disposed | (price as of 2026-10-05) |
| Nov. 29, 2022 | CSTL | P | 1,162 | $21.50 | $24,983 | 2,968 Direct | +64.34% | Acquired | 66.0% (price as of 2026-10-05) |
| June 2, 2022 | CSTL | A | 7,647 | · | · | 7,647 Direct | · | Acquired | (price as of 2026-10-05) |
| June 2, 2022 | CSTL | A | 3,825 | · | · | 3,825 Direct | · | Acquired | (price as of 2026-10-05) |
| May 12, 2022 | CSTL | P | 1,100 | $18.76 | $20,636 | 1,586 Direct | +226.34% | Acquired | 90.3% (price as of 2026-10-05) |
| May 12, 2022 | CSTL | P | 220 | $18.77 | $4,129 | 1,806 Direct | +13.87% | Acquired | 90.2% (price as of 2026-10-05) |
| May 10, 2022 | CSTL | M | 486 | · | · | 486 Direct | · | Acquired | (price as of 2026-10-05) |
| May 10, 2022 | CSTL | M | 486 | · | · | 974 Direct | -33.29% | Disposed | (price as of 2026-10-05) |
| May 10, 2021 | CSTL | A | 5,936 | · | · | 5,936 Direct | · | Acquired | (price as of 2026-10-05) |
| May 10, 2021 | CSTL | A | 1,460 | · | · | 1,460 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 |
|---|---|---|---|---|---|---|---|
| May 28, 2026 | CSTL | Restricted Stock Units | Common Stock | · | · | 11,766 | Acquired |
| May 22, 2026 | CSTL | Restricted Stock Units | Common Stock | · | · | 13,667 | Disposed |
| May 22, 2025 | CSTL | Restricted Stock Units | Common Stock | · | · | 13,667 | Acquired |
| May 21, 2025 | CSTL | Restricted Stock Units | Common Stock | · | · | 8,673 | Disposed |
| July 1, 2024 | CSTL | Restricted Stock Units | Common Stock | · | · | 830 | Acquired |
| July 1, 2024 | CSTL | Restricted Stock Units | Common Stock | · | · | 830 | Disposed |
| July 1, 2024 | CSTL | Stock option (right to buy) | Common Stock | $71.22 | July 1, 2034 | 3,379 | Acquired |
| May 25, 2024 | CSTL | Restricted Stock Units | Common Stock | · | · | 8,636 | Disposed |
| May 23, 2024 | CSTL | Restricted Stock Units | Common Stock | · | · | 8,673 | Acquired |
| May 10, 2024 | CSTL | Restricted Stock Units | Common Stock | · | · | 487 | Disposed |
| June 2, 2023 | CSTL | Restricted Stock Units | Common Stock | · | · | 3,825 | Disposed |
| May 25, 2023 | CSTL | Restricted Stock Units | Common Stock | · | · | 8,636 | Acquired |
| May 10, 2023 | CSTL | Restricted Stock Units | Common Stock | · | · | 487 | Disposed |
| June 2, 2022 | CSTL | Stock option (right to buy) | Common Stock | $20.77 | June 1, 2032 | 7,647 | Acquired |
| June 2, 2022 | CSTL | Restricted Stock Units | Common Stock | · | · | 3,825 | Acquired |
| May 10, 2022 | CSTL | Restricted Stock Units | Common Stock | · | · | 486 | Disposed |
| May 10, 2021 | CSTL | Stock option (right to buy) | Common Stock | $54.78 | May 9, 2031 | 5,936 | Acquired |
| May 10, 2021 | CSTL | Restricted Stock Units | Common Stock | · | · | 1,460 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).