Stephen R. Stone
Insider
First SEC filing: July 1, 2025 · Latest: July 1, 2025
Insider at
Insider transactions
1 buys (P)
0 sells (S)
Net: $4,830
Avg return of open purchases vs now: 11.6%
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 |
|---|---|---|---|---|---|---|---|---|---|
| April 27, 2026 | COSO | M | 17,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| April 27, 2026 | COSO | F | 5,022 | $25.59 | $128,513 | 132,363 Direct | -3.66% | Disposed | 5.3% (price as of 2026-10-05) |
| April 27, 2026 | COSO | M | 17,000 | · | · | 137,385 Direct | +14.12% | Acquired | (price as of 2026-10-05) |
| March 9, 2026 | COSO | P | 200 | $24.15 | $4,830 | 120,385 Direct | +0.17% | Acquired | 11.6% (price as of 2026-10-05) |
| Feb. 11, 2026 | COSO | A | 12,000 | · | · | 12,000 Direct | · | Acquired | (price as of 2026-10-05) |
| July 2, 2025 | COSO | P | 2,200 | $21.50 | $47,300 | 120,185 Direct | +1.86% | Acquired | 25.3% (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 |
|---|---|---|---|---|---|---|---|
| April 27, 2026 | COSO | Restricted Stock Units | Common Stock | · | April 27, 2026 | 17,000 | Disposed |
| Feb. 11, 2026 | COSO | Restricted Stock Units | Common Stock | · | Feb. 11, 2029 | 12,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 9 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| July 1, 2025 | COSO | Common Stock | 117,985 | Direct |
| July 1, 2025 | COSO | Common Stock | 4,830 | Indirect |
| July 1, 2025 | COSO | Restricted Stock Units [F1] | 17,000 | Direct |
| July 1, 2025 | COSO | Restricted Stock Units [F1] | 40,000 | Direct |
| July 1, 2025 | COSO | Stock option (right to purchase) | 75,000 | Direct |
| July 1, 2025 | COSO | Stock option (right to purchase) | 34,000 | Direct |
| July 1, 2025 | COSO | Stock option (right to purchase) | 10,000 | Direct |
| July 1, 2025 | COSO | Stock option (right to purchase) | 10,000 | Direct |
| July 1, 2025 | COSO | Restricted Stock Units | 17,000 | Direct |