Ernst W. Bruderer
Insider
First SEC filing: July 1, 2025 · Latest: July 1, 2025
Insider at
Insider transactions
0 buys (P)
4 sells (S)
Net: $-165,310
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 |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 31, 2026 | COSO | S | 2,000 | $27.43 | $54,860 | 41,131 Direct | -4.64% | Disposed | -1.6% (price as of 2026-10-02) |
| Aug. 26, 2026 | COSO | S | 2,000 | $27.50 | $55,000 | 43,131 Direct | -4.43% | Disposed | -1.9% (price as of 2026-10-02) |
| Aug. 18, 2026 | COSO | S | 1,000 | $27.89 | $27,890 | 45,131 Direct | -2.17% | Disposed | -3.3% (price as of 2026-10-02) |
| Aug. 12, 2026 | COSO | S | 1,000 | $27.56 | $27,560 | 46,131 Direct | -2.12% | Disposed | -2.1% (price as of 2026-10-02) |
| Feb. 11, 2026 | COSO | A | 868 | · | · | 868 Direct | · | Acquired | (price as of 2026-10-02) |
| July 2, 2025 | COSO | P | 2,000 | $21.50 | $43,000 | 47,131 Direct | +4.43% | Acquired | 25.5% (price as of 2026-10-02) |
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 |
|---|---|---|---|---|---|---|---|
| Feb. 11, 2026 | COSO | Restricted Stock Units | Common Stock | · | Dec. 31, 2026 | 868 | 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 |
|---|---|---|---|---|
| July 1, 2025 | COSO | Common Stock | 45,131 | Direct |