Richard Belluzzo is Director at QUANTUM CORP /DE/ (QTM). They have made 11 open-market trades across 3 companies since 2010, most recently 2026-05-04.
CIK 0001204925
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.
2 open-market purchases totalling $229K since 2010, against 9 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| VIAV | 160,740 | $5.4M |
| QTM | 484,072 | $784K |
| BLOX | 22,500 | $259K |
| JDSU | 54,237 | — |
| PMCS | 192,186 | — |
| Total | $6.4M |
Shares reported on the most recent Form 4, priced at the 2026-05-04 close. 2 holdings could not be priced and are excluded from the total.
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 |
|---|---|---|---|---|---|---|---|---|
| VIAV | SELL | 2026-05-04 | 2026-05-04 | $53.30 | $2.7M | -1.1% | -2.4% | -29.7% |
| VIAV | SELL | 2026-02-18 | 2026-02-18 | $26.85 | $424K | +36.1% | +21.1% | +89.8% |
| VIAV | SELL | 2026-02-17 | 2026-02-17 | $26.45 | $345K | +12.9% | +30.1% | +89.1% |
| VIAV | SELL · 10b5-1 | 2025-10-01 | 2025-10-01 | $12.63 | $212K | -2.7% | +36.8% | +39.2% |
| VIAV | SELL · 10b5-1 | 2025-09-02 | 2025-09-03 | $11.34 | $190K | +4.3% | +9.5% | +51.1% |
| VIAV | SELL · 10b5-1 | 2025-08-01 | 2025-08-01 | $9.72 | $163K | +12.2% | +16.9% | +74.0% |
| VIAV | SELL · 10b5-1 | 2025-07-01 | 2025-07-01 | $10.02 | $168K | +0.6% | -1.1% | +23.5% |
| VIAV | SELL · 10b5-1 | 2025-06-02 | 2025-06-02 | $9.03 | $151K | +2.7% | +13.6% | +25.7% |
| VIAV | SELL · 10b5-1 | 2025-05-07 | 2025-05-08 | $8.92 | $150K | +0.9% | +3.9% | +9.4% |
| VIAV | SELL · 10b5-1 | 2022-02-07 | 2022-02-08 | $17.07 | $42K | -4.5% | -8.0% | -18.3% |
| VIAV | SELL · 10b5-1 | 2022-01-05 | 2022-01-05 | $17.92 | $19K | -4.5% | -2.6% | -12.2% |
| VIAV | SELL · 10b5-1 | 2021-12-06 | 2021-12-06 | $15.66 | $38K | +2.7% | +8.6% | -3.7% |
| VIAV | SELL · 10b5-1 | 2021-11-05 | 2021-11-08 | $15.37 | $38K | +2.1% | +4.7% | +9.7% |
| VIAV | SELL · 10b5-1 | 2021-10-05 | 2021-10-07 | $15.34 | $38K | -1.6% | -0.6% | +13.1% |
| VIAV | SELL · 10b5-1 | 2021-09-07 | 2021-09-07 | $17.17 | $42K | -4.9% | -7.4% | -3.8% |
| VIAV | SELL · 10b5-1 | 2021-08-05 | 2021-08-05 | $16.33 | $40K | -0.9% | +3.0% | +1.7% |
| VIAV | SELL · 10b5-1 | 2021-07-07 | 2021-07-09 | $17.24 | $42K | -2.6% | -5.9% | -10.1% |
| VIAV | SELL · 10b5-1 | 2021-06-07 | 2021-06-08 | $17.34 | $42K | -1.6% | -2.3% | -3.9% |
| VIAV | SELL · 10b5-1 | 2021-05-05 | 2021-05-07 | $15.46 | $38K | +0.7% | +5.1% | -1.3% |
| VIAV | SELL · 10b5-1 | 2021-04-05 | 2021-04-06 | $16.23 | $40K | +4.2% | +1.6% | +8.6% |
| VIAV | SELL · 10b5-1 | 2018-01-12 | 2018-01-16 | $9.00 | $45K | -4.1% | +6.5% | +10.2% |
| VIAV | SELL | 2017-12-13 | 2017-12-19 | $9.00 | $90K | +1.5% | +1.2% | +14.2% |
| VIAV | SELL | 2017-11-21 | 2017-11-27 | $9.00 | $90K | -3.6% | -4.3% | +8.9% |
| VIAV | SELL | 2017-10-13 | 2017-10-13 | $9.54 | $191K | -0.9% | -9.0% | -6.7% |
| VIAV | SELL | 2017-09-13 | 2017-09-18 | $10.23 | $102K | -5.0% | -5.5% | -11.1% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.