David A. Duffield is 10% Owner at Workday, Inc. (WDAY). They have made 146 open-market trades across 1 company since 2013, most recently 2026-09-01.
CIK 0000938071
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 146 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| WDAY | 105,049 | $20.0M |
Shares reported on the most recent Form 4, priced at the 2026-09-03 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 45% | 41% | 33% |
| Avg Move | +0.2% | +1.7% | +3.6% |
| Scored | 123 | 123 | 123 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| WDAY | SELL · 10b5-1 | 2026-09-01 | 2026-09-03 | $199.29 | $18.9M | -7.7% | -7.2% | — |
| WDAY | SELL · 10b5-1 | 2026-07-09 | 2026-07-13 | $136.74 | $14.7M | -4.0% | +31.6% | +41.3% |
| WDAY | SELL · 10b5-1 | 2026-07-06 | 2026-07-07 | $135.24 | $14.5M | +3.1% | +21.3% | +34.5% |
| WDAY | SELL · 10b5-1 | 2026-06-30 | 2026-07-01 | $122.04 | $13.1M | +7.1% | +22.8% | +44.9% |
| WDAY | SELL · 10b5-1 | 2026-06-25 | 2026-06-29 | $115.60 | $12.4M | +13.1% | +36.7% | +53.5% |
| WDAY | SELL · 10b5-1 | 2026-06-22 | 2026-06-24 | $114.25 | $12.3M | +23.7% | +16.5% | +62.1% |
| WDAY | SELL · 10b5-1 | 2026-06-17 | 2026-06-18 | $124.99 | $13.4M | +13.4% | +28.1% | +63.4% |
| WDAY | SELL · 10b5-1 | 2026-06-12 | 2026-06-15 | $128.52 | $13.8M | -3.0% | +11.0% | +51.9% |
| WDAY | SELL · 10b5-1 | 2026-06-09 | 2026-06-11 | $138.32 | $14.9M | -8.8% | +12.0% | +43.8% |
| WDAY | SELL · 10b5-1 | 2026-06-04 | 2026-06-08 | $149.56 | $16.1M | -16.0% | -0.9% | +33.8% |
| WDAY | SELL · 10b5-1 | 2026-06-01 | 2026-06-03 | $156.64 | $16.8M | -15.1% | -9.6% | +29.9% |
| WDAY | SELL · 10b5-1 | 2026-04-09 | 2026-04-13 | $112.33 | $12.1M | -3.7% | -2.2% | +21.6% |
| WDAY | SELL · 10b5-1 | 2026-04-06 | 2026-04-07 | $129.60 | $13.9M | -4.3% | +1.1% | +6.6% |
| WDAY | SELL · 10b5-1 | 2026-03-31 | 2026-04-02 | $129.76 | $13.9M | -5.9% | -3.1% | -1.3% |
| WDAY | SELL · 10b5-1 | 2026-03-26 | 2026-03-30 | $128.35 | $27.6M | -12.7% | -5.0% | -4.1% |
| WDAY | SELL · 10b5-1 | 2026-03-23 | 2026-03-25 | $136.82 | $29.4M | +0.2% | -5.9% | -9.6% |
| WDAY | SELL · 10b5-1 | 2026-03-18 | 2026-03-20 | $132.58 | $28.5M | -5.9% | -6.7% | -14.8% |
| WDAY | SELL · 10b5-1 | 2026-03-13 | 2026-03-17 | $132.67 | $28.5M | -7.4% | -6.9% | -3.4% |
| WDAY | SELL | 2026-03-10 | 2026-03-12 | $142.18 | $15.3M | -3.9% | -10.9% | +2.2% |
| WDAY | SELL | 2026-03-05 | 2026-03-09 | $147.16 | $15.8M | -9.3% | -19.0% | -2.2% |
| WDAY | SELL · 10b5-1 | 2026-03-02 | 2026-03-04 | $134.40 | $14.4M | -7.3% | -10.0% | +3.3% |
| WDAY | SELL | 2026-01-08 | 2026-01-09 | $209.75 | $17.4M | -8.4% | -24.8% | -45.0% |
| WDAY | SELL | 2026-01-02 | 2026-01-06 | $205.29 | $16.7M | -11.3% | -24.6% | -38.4% |
| WDAY | SELL · 10b5-1 | 2025-12-23 | 2025-12-29 | $215.00 | $33.6M | -4.7% | -13.0% | -40.8% |
| WDAY | SELL · 10b5-1 | 2025-12-16 | 2025-12-18 | $215.91 | $33.2M | -1.1% | -15.8% | -39.1% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.