Dreyer Michael L
Director · FFIV, COHR
As of 2026-09-27, Dreyer Michael L has 16 Form 4 transactions on record across 2 companies — 5 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Pattern in the record: open-market sales filed in May in multiple years since 2024 — a recurring calendar cadence, more consistent with scheduled activity than a one-off decision.
Reconstructed holdings
- Direct $3.7M
- Indirect $0
| COHR | direct | 12,364 sh | $3.7M |
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-02-20 | FFIV | Sale | 3,067 @ $282.41 | $866K | −70.1% of holding | 1,309 | Form 4 |
| 2025-11-14 | COHR | Sale | 11,570 @ $144.88 | $1.7M | −48.9% of holding | 12,085 | Form 4 |
| 2025-05-27 | FFIV | Sale | 1,800 @ $285.96 | $515K | −29.1% of holding | 4,376 | Form 4 |
| 2024-06-05 | COHR | Sale | 14,239 @ $66.61 | $949K | −43.4% of holding | 18,552 | Form 4 |
| 2024-05-30 | FFIV | Sale | 2,250 @ $167.93 | $378K | −31.6% of holding | 4,867 | Form 4 |
11 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2026-03-11 | FFIV | Option exercise | 934 | 2,243 | Form 4 |
| 2026-03-11 | FFIV | Option exercise | 934 | 0 | Form 4 |
| 2026-02-11 | COHR | Award / grant | 279 | 12,364 | Form 4 |
| 2025-08-28 | COHR | Award / grant | 2,272 | 23,655 | Form 4 |
| 2025-03-13 | FFIV | Award / grant | 934 | 934 | Form 4 |
| 2025-03-12 | FFIV | Option exercise | 1,309 | 0 | Form 4 |
| 2025-03-12 | FFIV | Option exercise | 1,309 | 6,176 | Form 4 |
| 2024-08-29 | COHR | Award / grant | 2,831 | 21,383 | Form 4 |
| 2024-03-14 | FFIV | Award / grant | 1,309 | 1,309 | Form 4 |
| 2024-03-13 | FFIV | Option exercise | 1,770 | 0 | Form 4 |
| 2024-03-13 | FFIV | Option exercise | 1,770 | 7,117 | Form 4 |
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.