Derek J Maetzold
CIK 1239501 · View on SEC EDGAR ↗
Insider
First SEC filing: July 24, 2019 · Latest: Jan. 11, 2021
On this page
- Insider at Companies where this person is a reporting insider.
- Insider transactions Every share this person bought or sold, from Form 4 filings.
- Derivatives Options and other derivative holdings reported by this person.
- Initial holdings The stakes this person held when they first started reporting.
- Compensation Executive pay disclosed in company proxy statements.
Insider at
Insider transactions
0 buys (P)
65 sells (S)
Net:
$-3,192,458
+ 33 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
33 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 14, 2026 | CSTL | S 10b5-1 | 1,100 | $30.02 | $33,022 | 21,479 Direct | -4.87% | Disposed | 0.7% (price as of 2026-08-19) |
| Aug. 14, 2026 | CSTL | S 10b5-1 | 2,714 | $30.02 | $81,474 | 20,355 Indirect | -11.76% | Disposed | 0.7% (price as of 2026-08-19) |
| Aug. 14, 2026 | CSTL | S 10b5-1 | 2,306 | $30.02 | $69,226 | 17,301 Indirect | -11.76% | Disposed | 0.7% (price as of 2026-08-19) |
| Aug. 14, 2026 | CSTL | S 10b5-1 | 278 | $30.02 | $8,346 | 11,534 Indirect | -2.35% | Disposed | 0.7% (price as of 2026-08-19) |
| Aug. 14, 2026 | CSTL | S 10b5-1 | 278 | $30.02 | $8,346 | 11,534 Indirect | -2.35% | Disposed | 0.7% (price as of 2026-08-19) |
| Aug. 14, 2026 | CSTL | S 10b5-1 | 278 | $30.02 | $8,346 | 11,534 Indirect | -2.35% | Disposed | 0.7% (price as of 2026-08-19) |
| Aug. 14, 2026 | CSTL | S 10b5-1 | 278 | $30.02 | $8,346 | 11,534 Indirect | -2.35% | Disposed | 0.7% (price as of 2026-08-19) |
| Aug. 5, 2026 | CSTL | S 10b5-1 | 2,546 | $30.68 | $78,111 | 21,479 Direct | -10.60% | Disposed | -1.5% (price as of 2026-08-19) |
| Aug. 5, 2026 | CSTL | S 10b5-1 | 556 | $30.68 | $17,058 | 23,069 Indirect | -2.35% | Disposed | -1.5% (price as of 2026-08-19) |
| Aug. 5, 2026 | CSTL | S 10b5-1 | 473 | $30.68 | $14,512 | 19,607 Indirect | -2.36% | Disposed | -1.5% (price as of 2026-08-19) |
| Aug. 4, 2026 | CSTL | S 10b5-1 | 8,421 | $30.79 | $259,283 | 33,414 Direct | -20.13% | Disposed | -1.8% (price as of 2026-08-19) |
| Aug. 4, 2026 | CSTL | S 10b5-1 | 3,374 | $30.79 | $103,885 | 28,407 Indirect | -10.62% | Disposed | -1.8% (price as of 2026-08-19) |
| Aug. 4, 2026 | CSTL | S 10b5-1 | 2,866 | $30.79 | $88,244 | 24,143 Indirect | -10.61% | Disposed | -1.8% (price as of 2026-08-19) |
| Aug. 4, 2026 | CSTL | S 10b5-1 | 11,935 | $31.34 | $374,043 | 21,479 Direct | -35.72% | Disposed | -3.6% (price as of 2026-08-19) |
| Aug. 4, 2026 | CSTL | S 10b5-1 | 4,782 | $31.34 | $149,868 | 23,625 Indirect | -16.83% | Disposed | -3.6% (price as of 2026-08-19) |
| Aug. 4, 2026 | CSTL | S 10b5-1 | 4,063 | $31.34 | $127,334 | 20,080 Indirect | -16.83% | Disposed | -3.6% (price as of 2026-08-19) |
| Aug. 3, 2026 | CSTL | S 10b5-1 | 3,597 | $30.35 | $109,169 | 27,009 Indirect | -11.75% | Disposed | -0.4% (price as of 2026-08-19) |
| Aug. 3, 2026 | CSTL | S 10b5-1 | 4,232 | $30.35 | $128,441 | 31,781 Indirect | -11.75% | Disposed | -0.4% (price as of 2026-08-19) |
| Aug. 3, 2026 | CSTL | S 10b5-1 | 10,664 | $30.35 | $323,652 | 21,479 Direct | -33.18% | Disposed | -0.4% (price as of 2026-08-19) |
| July 31, 2026 | CSTL | S 10b5-1 | 1,690 | $30.15 | $50,954 | 30,606 Indirect | -5.23% | Disposed | 0.2% (price as of 2026-08-19) |
| July 31, 2026 | CSTL | S 10b5-1 | 1,983 | $30.15 | $59,787 | 36,013 Indirect | -5.22% | Disposed | 0.2% (price as of 2026-08-19) |
| July 31, 2026 | CSTL | S 10b5-1 | 6,480 | $30.15 | $195,372 | 21,479 Direct | -23.18% | Disposed | 0.2% (price as of 2026-08-19) |
| July 27, 2026 | CSTL | S 10b5-1 | 10 | $25.06 | $251 | 11,812 Indirect | -0.08% | Disposed | 20.6% (price as of 2026-08-19) |
| July 27, 2026 | CSTL | S 10b5-1 | 10 | $25.06 | $251 | 11,812 Indirect | -0.08% | Disposed | 20.6% (price as of 2026-08-19) |
| July 27, 2026 | CSTL | S 10b5-1 | 10 | $25.06 | $251 | 11,812 Indirect | -0.08% | Disposed | 20.6% (price as of 2026-08-19) |
| July 27, 2026 | CSTL | S 10b5-1 | 10 | $25.06 | $251 | 11,812 Indirect | -0.08% | Disposed | 20.6% (price as of 2026-08-19) |
| July 27, 2026 | CSTL | S 10b5-1 | 43 | $25.06 | $1,078 | 32,296 Indirect | -0.13% | Disposed | 20.6% (price as of 2026-08-19) |
| July 27, 2026 | CSTL | S 10b5-1 | 50 | $25.06 | $1,253 | 37,996 Indirect | -0.13% | Disposed | 20.6% (price as of 2026-08-19) |
| July 27, 2026 | CSTL | S 10b5-1 | 232 | $25.06 | $5,814 | 21,479 Direct | -1.07% | Disposed | 20.6% (price as of 2026-08-19) |
| July 27, 2026 | CSTL | S 10b5-1 | 268 | $24.13 | $6,467 | 11,822 Indirect | -2.22% | Disposed | 25.3% (price as of 2026-08-19) |
| July 27, 2026 | CSTL | S 10b5-1 | 268 | $24.13 | $6,467 | 11,822 Indirect | -2.22% | Disposed | 25.3% (price as of 2026-08-19) |
| July 27, 2026 | CSTL | S 10b5-1 | 268 | $24.13 | $6,467 | 11,822 Indirect | -2.22% | Disposed | 25.3% (price as of 2026-08-19) |
| July 27, 2026 | CSTL | S 10b5-1 | 268 | $24.13 | $6,467 | 11,822 Indirect | -2.22% | Disposed | 25.3% (price as of 2026-08-19) |
| July 27, 2026 | CSTL | S 10b5-1 | 1,110 | $24.13 | $26,784 | 32,339 Indirect | -3.32% | Disposed | 25.3% (price as of 2026-08-19) |
| July 27, 2026 | CSTL | S 10b5-1 | 1,307 | $24.13 | $31,538 | 38,046 Indirect | -3.32% | Disposed | 25.3% (price as of 2026-08-19) |
| July 27, 2026 | CSTL | S 10b5-1 | 5,982 | $24.13 | $144,346 | 21,711 Direct | -21.60% | Disposed | 25.3% (price as of 2026-08-19) |
| July 14, 2026 | CSTL | S 10b5-1 | 278 | $22.92 | $6,372 | 12,090 Indirect | -2.25% | Disposed | 31.9% (price as of 2026-08-19) |
| July 14, 2026 | CSTL | S 10b5-1 | 278 | $22.92 | $6,372 | 12,090 Indirect | -2.25% | Disposed | 31.9% (price as of 2026-08-19) |
| July 14, 2026 | CSTL | S 10b5-1 | 278 | $22.92 | $6,372 | 12,090 Indirect | -2.25% | Disposed | 31.9% (price as of 2026-08-19) |
| July 14, 2026 | CSTL | S 10b5-1 | 278 | $22.92 | $6,372 | 12,090 Indirect | -2.25% | Disposed | 31.9% (price as of 2026-08-19) |
| July 14, 2026 | CSTL | S 10b5-1 | 1,153 | $22.92 | $26,427 | 33,449 Indirect | -3.33% | Disposed | 31.9% (price as of 2026-08-19) |
| July 14, 2026 | CSTL | S 10b5-1 | 1,357 | $22.92 | $31,102 | 39,353 Indirect | -3.33% | Disposed | 31.9% (price as of 2026-08-19) |
| July 14, 2026 | CSTL | S 10b5-1 | 550 | $22.92 | $12,606 | 21,479 Direct | -2.50% | Disposed | 31.9% (price as of 2026-08-19) |
| July 1, 2026 | CSTL | S 10b5-1 | 278 | $24.29 | $6,753 | 12,368 Indirect | -2.20% | Disposed | 24.4% (price as of 2026-08-19) |
| July 1, 2026 | CSTL | S 10b5-1 | 278 | $24.29 | $6,753 | 12,368 Indirect | -2.20% | Disposed | 24.4% (price as of 2026-08-19) |
| July 1, 2026 | CSTL | S 10b5-1 | 278 | $24.29 | $6,753 | 12,368 Indirect | -2.20% | Disposed | 24.4% (price as of 2026-08-19) |
| July 1, 2026 | CSTL | S 10b5-1 | 278 | $24.29 | $6,753 | 12,368 Indirect | -2.20% | Disposed | 24.4% (price as of 2026-08-19) |
| July 1, 2026 | CSTL | S 10b5-1 | 1,153 | $24.29 | $28,006 | 34,602 Indirect | -3.22% | Disposed | 24.4% (price as of 2026-08-19) |
| July 1, 2026 | CSTL | S 10b5-1 | 1,357 | $24.29 | $32,962 | 40,710 Indirect | -3.23% | Disposed | 24.4% (price as of 2026-08-19) |
| July 1, 2026 | CSTL | S 10b5-1 | 6,214 | $24.29 | $150,938 | 21,479 Direct | -22.44% | Disposed | 24.4% (price as of 2026-08-19) |
| June 15, 2026 | CSTL | S 10b5-1 | 278 | $20.66 | $5,743 | 12,646 Indirect | -2.15% | Disposed | 46.3% (price as of 2026-08-19) |
| June 15, 2026 | CSTL | S 10b5-1 | 278 | $20.66 | $5,743 | 12,646 Indirect | -2.15% | Disposed | 46.3% (price as of 2026-08-19) |
| June 15, 2026 | CSTL | S 10b5-1 | 278 | $20.66 | $5,743 | 12,646 Indirect | -2.15% | Disposed | 46.3% (price as of 2026-08-19) |
| June 15, 2026 | CSTL | S 10b5-1 | 278 | $20.66 | $5,743 | 12,646 Indirect | -2.15% | Disposed | 46.3% (price as of 2026-08-19) |
| June 15, 2026 | CSTL | S 10b5-1 | 1,153 | $20.66 | $23,821 | 35,755 Indirect | -3.12% | Disposed | 46.3% (price as of 2026-08-19) |
| June 15, 2026 | CSTL | S 10b5-1 | 1,357 | $20.66 | $28,036 | 42,067 Indirect | -3.12% | Disposed | 46.3% (price as of 2026-08-19) |
| June 15, 2026 | CSTL | S 10b5-1 | 550 | $20.66 | $11,363 | 21,479 Direct | -2.50% | Disposed | 46.3% (price as of 2026-08-19) |
| June 1, 2026 | CSTL | S 10b5-1 | 278 | $20.86 | $5,799 | 1,668 Indirect | -14.29% | Disposed | 44.9% (price as of 2026-08-19) |
| June 1, 2026 | CSTL | S 10b5-1 | 278 | $20.86 | $5,799 | 1,668 Indirect | -14.29% | Disposed | 44.9% (price as of 2026-08-19) |
| June 1, 2026 | CSTL | S 10b5-1 | 278 | $20.86 | $5,799 | 1,668 Indirect | -14.29% | Disposed | 44.9% (price as of 2026-08-19) |
| June 1, 2026 | CSTL | S 10b5-1 | 278 | $20.86 | $5,799 | 1,668 Indirect | -14.29% | Disposed | 44.9% (price as of 2026-08-19) |
| June 1, 2026 | CSTL | S 10b5-1 | 1,153 | $20.86 | $24,052 | 36,908 Indirect | -3.03% | Disposed | 44.9% (price as of 2026-08-19) |
| June 1, 2026 | CSTL | S 10b5-1 | 1,357 | $20.86 | $28,307 | 43,424 Indirect | -3.03% | Disposed | 44.9% (price as of 2026-08-19) |
| June 1, 2026 | CSTL | S 10b5-1 | 6,214 | $20.86 | $129,624 | 21,479 Direct | -22.44% | Disposed | 44.9% (price as of 2026-08-19) |
| Sept. 2, 2025 | CSTL | S 10b5-1 | 1,339 | $23.93 | $32,042 | 67,005 Direct | -1.96% | Disposed | 26.3% (price as of 2026-08-19) |
| Aug. 15, 2025 | CSTL | S 10b5-1 | 1,339 | $20.04 | $26,834 | 68,344 Direct | -1.92% | Disposed | 50.8% (price as of 2026-08-19) |
| Aug. 13, 2025 | CSTL | S 10b5-1 | 43,019 | $19.50 | $838,870 | 69,683 Direct | -38.17% | Disposed | 55.0% (price as of 2026-08-19) |
Showing latest 100 of 102 transactions
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 |
|---|---|---|---|---|---|---|---|
| Aug. 14, 2026 | CSTL | Stock option (right to buy) | Common Stock (1,100) | $2.39 | May 9, 2028 | 1,100 | Disposed |
| Aug. 5, 2026 | CSTL | Stock option (right to buy) | Common Stock (2,546) | $2.39 | May 9, 2028 | 2,546 | Disposed |
| Aug. 4, 2026 | CSTL | Stock option (right to buy) | Common Stock (20,356) | $2.39 | May 9, 2028 | 20,356 | Disposed |
| Aug. 3, 2026 | CSTL | Stock option (right to buy) | Common Stock (10,664) | $2.39 | May 9, 2028 | 10,664 | Disposed |
| July 31, 2026 | CSTL | Stock option (right to buy) | Common Stock (6,480) | $2.39 | May 9, 2028 | 6,480 | Disposed |
| July 27, 2026 | CSTL | Stock option (right to buy) | Common Stock (6,214) | $2.39 | May 9, 2028 | 6,214 | Disposed |
| July 14, 2026 | CSTL | Stock option (right to buy) | Common Stock (550) | $2.39 | May 9, 2028 | 550 | Disposed |
| July 1, 2026 | CSTL | Stock option (right to buy) | Common Stock (6,214) | $2.39 | May 9, 2028 | 6,214 | Disposed |
| June 15, 2026 | CSTL | Stock option (right to buy) | Common Stock (550) | $2.39 | May 9, 2028 | 550 | Disposed |
| June 1, 2026 | CSTL | Stock option (right to buy) | Common Stock (6,010) | $2.39 | May 9, 2028 | 6,010 | Disposed |
| June 1, 2026 | CSTL | Stock option (right to buy) | Common Stock (204) | $2.39 | Nov. 11, 2028 | 204 | Disposed |
| Jan. 12, 2026 | CSTL | Performance-Based Stock Unit | Common Stock (62,219) | — | — | 62,219 | Acquired |
| Aug. 8, 2025 | CSTL | Performance-Based Stock Unit | Common Stock (66,991) | — | — | 66,991 | Disposed |
| July 29, 2019 | CSTL | Convertible Promissory Note | Common Stock (8,098) | — | — | — | Disposed |
| July 29, 2019 | CSTL | Series F Preferred Stock | Common Stock (1,524) | — | — | 1,859 | Disposed |
| July 29, 2019 | CSTL | Series E-3 Preferred Stock | Common Stock (398) | — | — | 486 | Disposed |
| July 29, 2019 | CSTL | Series E-2 Preferred Stock | Common Stock (447) | — | — | 546 | Disposed |
| July 29, 2019 | CSTL | Series D Preferred Stock | Common Stock (434) | — | — | 530 | Disposed |
| July 29, 2019 | CSTL | Series A Preferred Stock | Common Stock (84,455) | — | — | 102,954 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 14 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| July 24, 2019 | CSTL | Common Stock | 1,476,620 | Direct |
| July 24, 2019 | CSTL | Common Stock | 164,068 | Indirect |
| July 24, 2019 | CSTL | Stock option (right to buy)→ Common Stock (65,627) | 65,627 | Direct |
| July 24, 2019 | CSTL | Stock option (right to buy)→ Common Stock (16,406) | 16,406 | Direct |
| July 24, 2019 | CSTL | Stock option (right to buy)→ Common Stock (98,441) | 98,441 | Direct |
| July 24, 2019 | CSTL | Stock option (right to buy)→ Common Stock (20,508) | 20,508 | Direct |
| July 24, 2019 | CSTL | Stock option (right to buy)→ Common Stock (65,627) | 65,627 | Direct |
| July 24, 2019 | CSTL | Stock option (right to buy)→ Common Stock (36,095) | 36,095 | Direct |
| July 24, 2019 | CSTL | Series A Preferred Stock→ Common Stock (84,455) | 84,455 | Direct |
| July 24, 2019 | CSTL | Series D Preferred Stock→ Common Stock (434) | 434 | Direct |
| July 24, 2019 | CSTL | Series E-2 Preferred Stock→ Common Stock (447) | 447 | Direct |
| July 24, 2019 | CSTL | Series E-3 Preferred Stock→ Common Stock (398) | 398 | Direct |
| July 24, 2019 | CSTL | Series F Preferred Stock→ Common Stock (1,524) | 1,524 | Direct |
| July 24, 2019 | CSTL | Convertible Promissory Note→ Common Stock | — | Direct |
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
CSTL
President and CEO| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2025 | $751,350 | — | $4,977,208 | — | $1,036,863 | — | $21,350 | $6,786,771 |
| 2024 | $715,572 | — | $5,283,595 | — | $921,657 | — | $20,250 | $6,941,074 |
| 2023 | $686,400 | — | — | — | $893,350 | — | $26,234 | $1,605,984 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.