J. William Gurley is 10% Owner at Amplitude, Inc. (AMPL). They have made 20 open-market trades across 8 companies since 2010, most recently 2026-09-30.
CIK 0001190191
4 open-market purchases totalling $46.5M since 2019, against 16 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| SFIX | 2,231,673 | $5.7M |
| AMBA | 50,865 | $3.1M |
| UBNT | 25,000 | $2.8M |
| Z | 72,646 | $2.2M |
| NEWR | 10,897 | $948K |
| GRUB | 137,648 | $925K |
| NXDR | 194,941 | $479K |
| CFLT | 11,780 | $365K |
| OPEN | 144,450 | $306K |
| KIND | 68,627 | $129K |
| AMPL | 2,100 | $31K |
| SREV | 7,903 | $12K |
| CYN | 290,162 | — |
| Total | $17.0M |
Shares reported on the most recent Form 4, priced at the 2026-10-02 close. 1 holding could not be priced and is excluded from the total.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 78% | 67% | 67% |
| Avg Move | -6.0% | -1.5% | -16.4% |
| Scored | 9 | 9 | 9 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CFLT | SELL | 2022-08-09 | 2022-08-11 | $31.32 | $1.3M | -10.9% | -6.7% | -38.8% |
| AMPL | SELL | 2022-08-09 | 2022-08-10 | $16.96 | $228K | -19.0% | -9.1% | -25.6% |
| AMPL | SELL | 2022-08-09 | 2022-08-11 | $17.41 | $173K | -13.9% | -2.6% | -25.7% |
| SFIX | BUY | 2022-07-08 | 2022-07-12 | $5.43 | $5.4M | +8.7% | +28.3% | -29.9% |
| AMPL | SELL | 2021-11-16 | 2021-11-18 | $70.22 | $21.1M | -10.2% | -25.4% | -39.6% |
| CFLT | SELL | 2021-11-16 | 2021-11-18 | $84.48 | $22.0M | -11.9% | -18.6% | -27.6% |
| AMPL | SELL | 2021-11-15 | 2021-11-16 | $71.36 | $4.5M | +0.2% | -29.6% | -40.5% |
| AMPL | SELL | 2021-10-04 | 2021-10-06 | $54.05 | $10.7M | +26.6% | +66.8% | +0.5% |
| SFIX | BUY | 2020-04-09 | 2020-04-13 | $15.81 | $31.6M | -4.1% | +14.5% | +59.7% |
| SFIX | BUY | 2020-03-12 | 2020-03-17 | $12.76 | $6.4M | -3.1% | +13.5% | +77.5% |
| SFIX | BUY | 2019-10-10 | 2019-10-15 | $20.83 | $3.1M | +11.0% | +5.7% | +14.9% |
| NEWR | SELL | 2016-06-15 | 2016-06-17 | $29.99 | $4.5M | -0.9% | +9.7% | +24.5% |
| ZEN | SELL | 2015-05-13 | 2015-05-28 | $22.53 | $1.9M | -10.2% | +0.3% | +0.3% |
| Z | SELL | 2014-05-16 | 2014-05-19 | $105.08 | $2.7M | -7.1% | -4.2% | -4.2% |
| Z | SELL | 2014-05-12 | 2014-05-14 | $97.82 | $98K | -7.1% | -4.2% | -4.2% |
| Z | SELL | 2013-09-06 | 2013-09-09 | $95.90 | $123K | -7.1% | -4.2% | -4.2% |
| AMBA | SELL | 2012-10-15 | 2012-10-15 | $6.00 | $3.3M | -18.1% | -0.6% | -0.6% |
| Z | SELL | 2012-05-10 | 2012-05-11 | $42.80 | $78K | -7.1% | -4.2% | -4.2% |
| OPEN | SELL | 2010-11-30 | 2010-12-01 | $72.50 | $85K | +8.7% | +0.5% | +0.5% |
| OPEN | SELL | 2010-11-24 | 2010-11-29 | $71.16 | $4.1M | +8.7% | +0.5% | +0.5% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.