ZACHARY STERNBERG
CIK 1679333 · View on SEC EDGAR ↗
Insider
Activist
First SEC filing: Nov. 16, 2017 · Latest: May 5, 2026
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 25 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 |
|---|---|---|---|---|---|---|---|---|---|
| Nov. 15, 2024 | CMPR | M | 351 | — | — | 17,200 Direct | +2.08% | Acquired | (price as of 2026-08-21) |
| Nov. 15, 2024 | CMPR | M | 1,128 | — | — | 18,328 Direct | +6.56% | Acquired | (price as of 2026-08-21) |
| Nov. 15, 2024 | CMPR | M | 494 | — | — | 18,822 Direct | +2.70% | Acquired | (price as of 2026-08-21) |
| Nov. 15, 2024 | CMPR | F | 949 | $80.48 | $76,376 | 17,873 Direct | -5.04% | Disposed | 9.5% (price as of 2026-08-21) |
| Nov. 15, 2024 | CMPR | M | 351 | — | — | 351 Direct | -50.00% | Disposed | (price as of 2026-08-21) |
| Nov. 15, 2024 | CMPR | M | 1,128 | — | — | 2,255 Direct | -33.34% | Disposed | (price as of 2026-08-21) |
| Nov. 15, 2024 | CMPR | M | 494 | — | — | 1,481 Direct | -25.01% | Disposed | (price as of 2026-08-21) |
| Dec. 14, 2023 | CMPR | A | 1,975 | — | — | 1,975 Direct | — | Acquired | (price as of 2026-08-21) |
| Nov. 15, 2023 | CMPR | M | 351 | — | — | 16,432 Direct | +2.18% | Acquired | (price as of 2026-08-21) |
| Nov. 15, 2023 | CMPR | M | 1,128 | — | — | 17,560 Direct | +6.86% | Acquired | (price as of 2026-08-21) |
| Nov. 15, 2023 | CMPR | F | 711 | $68.98 | $49,045 | 16,849 Direct | -4.05% | Disposed | 27.8% (price as of 2026-08-21) |
| Nov. 15, 2023 | CMPR | M | 351 | — | — | 702 Direct | -33.33% | Disposed | (price as of 2026-08-21) |
| Nov. 15, 2023 | CMPR | M | 1,128 | — | — | 3,383 Direct | -25.01% | Disposed | (price as of 2026-08-21) |
| Nov. 16, 2022 | CMPR | A | 4,511 | — | — | 4,511 Direct | — | Acquired | (price as of 2026-08-21) |
| Nov. 15, 2022 | CMPR | M | 351 | — | — | 16,250 Direct | +2.21% | Acquired | (price as of 2026-08-21) |
| Nov. 15, 2022 | CMPR | F | 169 | $27.74 | $4,688 | 16,081 Direct | -1.04% | Disposed | 217.7% (price as of 2026-08-21) |
| Nov. 15, 2022 | CMPR | M | 351 | — | — | 1,053 Direct | -25.00% | Disposed | (price as of 2026-08-21) |
| Nov. 15, 2021 | CMPR | A | 1,404 | — | — | 1,404 Direct | — | Acquired | (price as of 2026-08-21) |
| Nov. 15, 2020 | CMPR | A | 1,123 | — | — | 1,123 Direct | — | Acquired | (price as of 2026-08-21) |
| Aug. 15, 2020 | CMPR | M | 1,071 | — | — | 16,414 Direct | +6.98% | Acquired | (price as of 2026-08-21) |
| Aug. 15, 2020 | CMPR | F | 515 | $95.31 | $49,085 | 15,899 Direct | -3.14% | Disposed | -7.5% (price as of 2026-08-21) |
| Aug. 15, 2020 | CMPR | M | 1,071 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-21) |
| April 1, 2020 | CMPR | A | 1,071 | — | — | 1,071 Direct | — | Acquired | (price as of 2026-08-21) |
| Nov. 15, 2018 | CMPR | A | 1,165 | — | — | 1,165 Direct | — | Acquired | (price as of 2026-08-21) |
| Nov. 15, 2017 | CMPR | A | 1,721 | — | — | 1,721 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 |
|---|---|---|---|---|---|---|---|
| Nov. 15, 2024 | CMPR | Restricted Share Units (right to acquire) | Ordinary Shares (351) | — | Nov. 15, 2025 | 351 | Disposed |
| Nov. 15, 2024 | CMPR | Restricted Share Units (right to acquire) | Ordinary Shares (1,128) | — | Nov. 15, 2026 | 1,128 | Disposed |
| Nov. 15, 2024 | CMPR | Restricted Share Units (right to acquire) | Ordinary Shares (494) | — | Nov. 15, 2027 | 494 | Disposed |
| Dec. 14, 2023 | CMPR | Restricted Share Units (right to acquire) | Ordinary Shares (1,975) | — | Nov. 15, 2027 | 1,975 | Acquired |
| Nov. 15, 2023 | CMPR | Restricted Share Units (right to acquire) | Ordinary Shares (351) | — | Nov. 15, 2025 | 351 | Disposed |
| Nov. 15, 2023 | CMPR | Restricted Share Units (right to acquire) | Ordinary Shares (1,128) | — | Nov. 15, 2026 | 1,128 | Disposed |
| Nov. 16, 2022 | CMPR | Restricted Share Units (right to acquire) | Ordinary Shares (4,511) | — | Nov. 15, 2026 | 4,511 | Acquired |
| Nov. 15, 2022 | CMPR | Restricted Share Units (right to acquire) | Ordinary Shares (351) | — | Nov. 15, 2025 | 351 | Disposed |
| Nov. 15, 2021 | CMPR | Restricted Share Units (right to acquire) | Ordinary Shares (1,404) | — | Nov. 15, 2025 | 1,404 | Acquired |
| Nov. 15, 2020 | CMPR | Performance Share Units [F1] | Ordinary Shares (1,123) | — | Nov. 15, 2030 | 1,123 | Acquired |
| Aug. 15, 2020 | CMPR | Restricted Share Units (right to acquire) | Ordinary Shares (1,071) | — | Aug. 15, 2020 | 1,071 | Disposed |
| April 1, 2020 | CMPR | Restricted Share Units (right to acquire) | Ordinary Shares (1,071) | — | Aug. 15, 2020 | 1,071 | Acquired |
| Nov. 15, 2018 | CMPR | Performance Share Units [F1] | Ordinary Shares (1,165) | — | Nov. 15, 2028 | 1,165 | Acquired |
| Nov. 15, 2017 | CMPR | Performance Share Units | Ordinary Shares (1,721) | — | Nov. 15, 2027 | 1,721 | 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.