Bernard Shek
Insider
First SEC filing: March 14, 2025 · Latest: June 5, 2026
Insider at
Insider transactions
0 buys (P)
6 sells (S)
Net: $-9,027,018
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 |
|---|---|---|---|---|---|---|---|---|---|
| Oct. 1, 2026 | SNDK | S 10b5-1 | 600 | $1734.94 | $1,040,964 | 25,588 Direct | -2.29% | Disposed | -1.8% (price as of 2026-10-05) |
| Sept. 20, 2026 | SNDK | F | 118 | $1791.82 | $211,435 | 26,188 Direct | -0.45% | Disposed | -4.9% (price as of 2026-10-05) |
| Sept. 17, 2026 | SNDK | A | 1,001 | · | · | 26,306 Direct | +3.96% | Acquired | (price as of 2026-10-05) |
| Sept. 8, 2026 | SNDK | S 10b5-1 | 2,308 | $1767.33 | $4,078,998 | 25,305 Direct | -8.36% | Disposed | -3.6% (price as of 2026-10-05) |
| Sept. 3, 2026 | SNDK | F | 2,271 | $1554.99 | $3,531,382 | 27,613 Direct | -7.60% | Disposed | 9.6% (price as of 2026-10-05) |
| Sept. 1, 2026 | SNDK | S 10b5-1 | 600 | $1525.60 | $915,360 | 29,884 Direct | -1.97% | Disposed | 11.7% (price as of 2026-10-05) |
| Aug. 25, 2026 | SNDK | F | 212 | $1480.77 | $313,923 | 30,484 Direct | -0.69% | Disposed | 15.1% (price as of 2026-10-05) |
| Aug. 21, 2026 | SNDK | F | 108 | $1596.08 | $172,377 | 30,696 Direct | -0.35% | Disposed | 6.8% (price as of 2026-10-05) |
| Aug. 20, 2026 | SNDK | F | 111 | $1600.62 | $177,669 | 30,804 Direct | -0.36% | Disposed | 6.5% (price as of 2026-10-05) |
| Aug. 3, 2026 | SNDK | S 10b5-1 | 600 | $1162.16 | $697,296 | 30,915 Direct | -1.90% | Disposed | 46.6% (price as of 2026-10-05) |
| July 1, 2026 | SNDK | S 10b5-1 | 600 | $2088.00 | $1,252,800 | 31,515 Direct | -1.87% | Disposed | -18.4% (price as of 2026-10-05) |
| June 20, 2026 | SNDK | F | 117 | $2184.75 | $255,616 | 32,115 Direct | -0.36% | Disposed | -22.0% (price as of 2026-10-05) |
| June 3, 2026 | SNDK | S 10b5-1 | 600 | $1736.00 | $1,041,600 | 32,232 Direct | -1.83% | Disposed | -1.8% (price as of 2026-10-05) |
| May 25, 2026 | SNDK | F | 211 | $1478.69 | $312,004 | 32,832 Direct | -0.64% | Disposed | 15.2% (price as of 2026-10-05) |
| May 21, 2026 | SNDK | F | 107 | $1542.24 | $165,020 | 33,043 Direct | -0.32% | Disposed | 10.5% (price as of 2026-10-05) |
| May 20, 2026 | SNDK | F | 109 | $1392.56 | $151,789 | 33,150 Direct | -0.33% | Disposed | 22.4% (price as of 2026-10-05) |
| April 20, 2026 | SNDK | F | 41 | $913.02 | $37,434 | 33,259 Direct | -0.12% | Disposed | 86.7% (price as of 2026-10-05) |
| March 20, 2026 | SNDK | F | 117 | $709.71 | $83,036 | 33,300 Direct | -0.35% | Disposed | 140.1% (price as of 2026-10-05) |
| Feb. 25, 2026 | SNDK | F | 211 | $632.38 | $133,432 | 33,417 Direct | -0.63% | Disposed | 169.5% (price as of 2026-10-05) |
| Feb. 21, 2026 | SNDK | F | 107 | $649.97 | $69,547 | 33,628 Direct | -0.32% | Disposed | 162.2% (price as of 2026-10-05) |
| Feb. 20, 2026 | SNDK | F | 117 | $649.97 | $76,046 | 33,735 Direct | -0.35% | Disposed | 162.2% (price as of 2026-10-05) |
| Jan. 20, 2026 | SNDK | F | 34 | $453.12 | $15,406 | 33,852 Direct | -0.10% | Disposed | 276.1% (price as of 2026-10-05) |
| Dec. 20, 2025 | SNDK | F | 117 | $237.61 | $27,800 | 33,886 Direct | -0.34% | Disposed | 617.2% (price as of 2026-10-05) |
| Nov. 25, 2025 | SNDK | F | 211 | $220.50 | $46,526 | 34,003 Direct | -0.62% | Disposed | 672.9% (price as of 2026-10-05) |
| Nov. 21, 2025 | SNDK | F | 107 | $200.27 | $21,429 | 34,214 Direct | -0.31% | Disposed | 750.9% (price as of 2026-10-05) |
| Nov. 20, 2025 | SNDK | F | 109 | $195.96 | $21,360 | 34,321 Direct | -0.32% | Disposed | 769.6% (price as of 2026-10-05) |
| Oct. 20, 2025 | SNDK | F | 362 | $148.04 | $53,590 | 34,430 Direct | -1.04% | Disposed | 1051.1% (price as of 2026-10-05) |
| Sept. 20, 2025 | SNDK | F | 117 | $102.21 | $11,959 | 34,792 Direct | -0.34% | Disposed | 1567.3% (price as of 2026-10-05) |
| Sept. 3, 2025 | SNDK | A | 18,313 | · | · | 34,909 Direct | +110.35% | Acquired | (price as of 2026-10-05) |
| Aug. 27, 2025 | SNDK | F | 78 | $48.44 | $3,778 | 16,596 Direct | -0.47% | Disposed | 3418.1% (price as of 2026-10-05) |
| Aug. 25, 2025 | SNDK | F | 211 | $46.78 | $9,871 | 16,674 Direct | -1.25% | Disposed | 3542.9% (price as of 2026-10-05) |
| Aug. 21, 2025 | SNDK | F | 428 | $45.50 | $19,474 | 16,885 Direct | -2.47% | Disposed | 3645.4% (price as of 2026-10-05) |
| Aug. 20, 2025 | SNDK | F | 110 | $44.40 | $4,884 | 17,313 Direct | -0.63% | Disposed | 3738.2% (price as of 2026-10-05) |
| July 20, 2025 | SNDK | F | 29 | $42.19 | $1,224 | 17,423 Direct | -0.17% | Disposed | 3939.3% (price as of 2026-10-05) |
| June 20, 2025 | SNDK | F | 184 | $46.58 | $8,571 | 17,452 Direct | -1.04% | Disposed | 3558.6% (price as of 2026-10-05) |
| May 27, 2025 | SNDK | F | 54 | $38.18 | $2,062 | 17,636 Direct | -0.31% | Disposed | 4363.5% (price as of 2026-10-05) |
| May 25, 2025 | SNDK | F | 147 | $37.28 | $5,480 | 17,690 Direct | -0.82% | Disposed | 4471.2% (price as of 2026-10-05) |
| May 20, 2025 | SNDK | F | 76 | $40.18 | $3,054 | 17,837 Direct | -0.42% | Disposed | 4141.3% (price as of 2026-10-05) |
| May 9, 2025 | SNDK | A | 59,121 | · | · | 59,121 Direct | · | Acquired | (price as of 2026-10-05) |
| April 20, 2025 | SNDK | F | 29 | $31.29 | $907 | 17,913 Direct | -0.16% | Disposed | 5346.3% (price as of 2026-10-05) |
| March 20, 2025 | SNDK | F | 81 | $56.21 | $4,553 | 17,942 Direct | -0.45% | Disposed | 2931.8% (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 9, 2025 | SNDK | Performance Shares | Common Stock | · | · | 59,121 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| March 14, 2025 | SNDK | Common Stock | 18,023 | Direct |