Mika Yamamoto is CMO & VP at F5, INC. (FFIV). They have made 15 open-market trades across 2 companies since 2020, most recently 2026-06-05.
CIK 0001771433
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 15 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| FRSH | 1,127,723 | $15.5M |
| FFIV | 17,271 | $7.6M |
| BL | 16,692 | $498K |
| Total | $23.6M |
Shares reported on the most recent Form 4, priced at the 2026-06-08 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| BL | SELL | 2026-06-05 | 2026-06-08 | $28.48 | $85K | -5.8% | +0.6% | +6.0% |
| FRSH | SELL · 10b5-1 | 2026-03-04 | 2026-03-05 | $8.45 | $275K | -8.4% | -5.5% | +9.2% |
| FRSH | SELL · 10b5-1 | 2025-12-05 | 2025-12-09 | $13.00 | $195K | -3.9% | -10.0% | -35.7% |
| FRSH | SELL · 10b5-1 | 2025-09-04 | 2025-09-08 | $13.00 | $9K | +0.4% | -14.8% | -2.2% |
| FRSH | SELL · 10b5-1 | 2025-09-02 | 2025-09-03 | $13.18 | $113K | -4.6% | -14.1% | -7.2% |
| FRSH | SELL · 10b5-1 | 2025-08-04 | 2025-08-05 | $13.00 | $56K | -3.4% | -3.9% | -17.4% |
| FRSH | SELL · 10b5-1 | 2025-07-01 | 2025-07-03 | $15.05 | $129K | -7.3% | -13.5% | -23.6% |
| FRSH | SELL · 10b5-1 | 2025-06-04 | 2025-06-06 | $15.50 | $27K | -5.3% | -4.9% | -17.5% |
| FRSH | SELL · 10b5-1 | 2025-06-02 | 2025-06-03 | $15.13 | $108K | -4.4% | -2.8% | -15.8% |
| FRSH | SELL · 10b5-1 | 2025-05-05 | 2025-05-05 | $14.66 | $105K | +8.5% | +8.8% | -9.0% |
| FRSH | SELL · 10b5-1 | 2025-04-01 | 2025-04-03 | $14.20 | $102K | +2.5% | +15.8% | +17.8% |
| FRSH | SELL · 10b5-1 | 2025-03-03 | 2025-03-04 | $16.60 | $59K | -8.8% | -19.7% | -8.0% |
| FRSH | SELL · 10b5-1 | 2025-02-03 | 2025-02-04 | $18.29 | $105K | -7.7% | -13.7% | -21.5% |
| FRSH | SELL · 10b5-1 | 2025-01-02 | 2025-01-03 | $15.84 | $45K | +7.2% | +13.4% | -19.5% |
| FRSH | SELL · 10b5-1 | 2024-12-17 | 2024-12-19 | $16.95 | $194K | +6.0% | +16.3% | +3.1% |
| BL | SELL | 2024-11-11 | 2024-11-12 | $62.08 | $387K | +2.1% | +5.5% | +4.9% |
| BL | SELL | 2023-11-08 | 2023-11-09 | $53.77 | $269K | +7.8% | +16.2% | +15.9% |
| FFIV | SELL · 10b5-1 | 2023-05-02 | 2023-05-02 | $133.02 | $439K | +4.3% | +10.8% | +19.9% |
| FFIV | SELL | 2023-02-02 | 2023-02-03 | $151.49 | $488K | -2.3% | -3.8% | -13.1% |
| FFIV | SELL | 2022-11-02 | 2022-11-03 | $141.37 | $1.1M | +11.6% | +10.9% | +10.6% |
| FFIV | SELL | 2022-08-02 | 2022-08-03 | $164.90 | $675K | +1.2% | -8.8% | -15.5% |
| FFIV | SELL | 2022-05-03 | 2022-05-05 | $171.33 | $308K | +0.6% | -1.0% | +2.1% |
| FFIV | SELL | 2022-02-02 | 2022-02-03 | $207.25 | $735K | -0.9% | -3.5% | -12.5% |
| FFIV | SELL | 2021-11-02 | 2021-11-04 | $218.64 | $2.4M | +5.0% | +0.4% | -6.5% |
| FFIV | SELL | 2021-08-03 | 2021-08-05 | $208.31 | $749K | -4.3% | -4.2% | +5.1% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.