Walden C. Rhines is Chairman at MENTOR GRAPHICS CORP (MENT). They have made 28 open-market trades across 4 companies since 2006, most recently 2026-08-29.
CIK 0001221184
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.
9 open-market purchases totalling $1.8M since 2008, against 19 sales. Across 5 scored buys the stock is down 8.1% at ninety days, and 10.6 points behind the S&P over the same stretch.
5 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| QRVO | 74,065 | $8.5M |
| MENT | 199,750 | $7.4M |
| SVCO | 539,209 | $3.3M |
| TQNT | 47,500 | — |
| Total | $19.3M |
Shares reported on the most recent Form 4, priced at the 2026-09-01 close. 1 holding could not be priced and is excluded from the total.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 80% | 80% | 20% |
| Avg Move | +5.1% | +6.8% | -8.1% |
| Alpha | +4.2% | +5.0% | -10.6% |
| Scored | 5 | 5 | 5 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| SVCO | BUY | 2025-12-09 | 2025-12-09 | $4.01 | $53K | +4.4% | +9.3% | -19.2% |
| SVCO | BUY | 2025-11-18 | 2025-11-19 | $4.07 | $236K | -0.7% | -3.8% | -20.1% |
| SVCO | BUY | 2025-11-17 | 2025-11-18 | $3.90 | $44K | +10.1% | +7.4% | -12.8% |
| QRVO | BUY | 2023-11-27 | 2023-11-28 | $93.19 | $466K | +9.4% | +20.1% | +19.4% |
| QRVO | SELL | 2021-08-30 | 2021-08-31 | $191.29 | $5.9M | -4.0% | -12.0% | -20.6% |
| QRVO | BUY | 2016-08-05 | 2016-08-09 | $54.02 | $270K | +2.5% | +1.0% | -8.0% |
| MENT | SELL | 2015-10-09 | 2015-10-13 | $25.65 | $4.4M | -10.4% | +0.7% | -6.3% |
| MENT | SELL | 2015-04-13 | 2015-04-15 | $24.70 | $2.5M | -10.4% | +0.7% | +0.7% |
| MENT | SELL | 2015-04-13 | 2015-04-14 | $24.71 | $2.5M | -10.4% | +0.7% | +0.7% |
| TQNT | SELL | 2014-08-29 | 2014-09-03 | $20.61 | $412K | N/A | N/A | N/A |
| TQNT | SELL | 2014-05-23 | 2014-05-28 | $15.48 | $1.3M | N/A | N/A | N/A |
| TQNT | SELL | 2014-05-15 | 2014-05-19 | $14.42 | $1.2M | N/A | N/A | N/A |
| MENT | SELL | 2014-01-08 | 2014-01-10 | $23.42 | $10.4M | -10.4% | +0.7% | +0.7% |
| MENT | SELL | 2013-09-12 | 2013-09-13 | $22.82 | $5.0M | -10.4% | +0.7% | +0.7% |
| MENT | SELL | 2013-04-11 | 2013-04-15 | $17.56 | $3.1M | -10.4% | +0.7% | +0.7% |
| TQNT | BUY | 2012-11-09 | 2012-11-13 | $4.70 | $376K | N/A | N/A | N/A |
| MENT | SELL | 2012-09-05 | 2012-09-07 | $17.05 | $5.6M | -10.4% | +0.7% | +0.7% |
| MENT | SELL | 2011-12-19 | 2011-12-21 | $12.75 | $1.6M | -10.4% | +0.7% | +0.7% |
| TQNT | BUY | 2011-11-22 | 2011-11-22 | $4.25 | $64K | N/A | N/A | N/A |
| TQNT | BUY | 2011-11-07 | 2011-11-08 | $5.19 | $80K | N/A | N/A | N/A |
| MENT | SELL | 2010-12-23 | 2010-12-23 | $12.18 | $88K | -10.4% | +0.7% | +0.7% |
| TQNT | SELL | 2010-11-03 | 2010-11-05 | $10.15 | $178K | N/A | N/A | N/A |
| TQNT | SELL | 2010-06-04 | 2010-06-08 | $6.96 | $122K | N/A | N/A | N/A |
| MENT | SELL | 2009-08-27 | 2009-08-28 | $8.76 | $266K | -10.4% | +0.7% | +0.7% |
| TQNT | BUY | 2008-03-11 | 2008-03-13 | $4.71 | $235K | N/A | N/A | N/A |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.