Robert Schlossman is CLO at Zscaler, Inc. (ZS). They have made 50 open-market trades across 1 company since 2018, most recently 2026-09-21.
CIK 0001435941
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 50 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| ZS | 61,525 | $12.8M |
Shares reported on the most recent Form 4, priced at the 2026-09-21 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 |
|---|---|---|---|---|---|---|---|---|
| ZS | SELL · 10b5-1 | 2026-09-21 | 2026-09-21 | $200.00 | $1.1M | -5.0% | — | — |
| ZS | SELL | 2026-09-16 | 2026-09-17 | $192.76 | $448K | -0.2% | — | — |
| ZS | SELL · 10b5-1 | 2026-07-06 | 2026-07-07 | $150.00 | $18K | +1.7% | +10.2% | +36.8% |
| ZS | SELL | 2026-06-16 | 2026-06-17 | $126.43 | $398K | +14.5% | +21.6% | +57.2% |
| ZS | SELL | 2026-03-17 | 2026-03-18 | $156.59 | $709K | -12.2% | -13.8% | -18.7% |
| ZS | SELL · 10b5-1 | 2025-12-16 | 2025-12-17 | $231.67 | $2.5M | -0.5% | -6.4% | -31.8% |
| ZS | SELL · 10b5-1 | 2025-10-24 | 2025-10-24 | $325.00 | $1.0M | -0.6% | -14.0% | -36.1% |
| ZS | SELL · 10b5-1 | 2025-10-02 | 2025-10-02 | $305.87 | $3.7M | -2.0% | +9.2% | -27.0% |
| ZS | SELL | 2025-09-16 | 2025-09-17 | $280.70 | $2.2M | +5.1% | +6.3% | -17.6% |
| ZS | SELL · 10b5-1 | 2025-06-17 | 2025-06-18 | $304.51 | $2.9M | +0.6% | -5.5% | -7.7% |
| ZS | SELL · 10b5-1 | 2025-06-04 | 2025-06-06 | $300.00 | $1.4M | +0.6% | +3.9% | -11.6% |
| ZS | SELL · 10b5-1 | 2025-05-16 | 2025-05-19 | $250.00 | $898K | +9.9% | +21.8% | +10.5% |
| ZS | SELL · 10b5-1 | 2025-03-18 | 2025-03-20 | $201.33 | $2.2M | +0.3% | -3.4% | +52.3% |
| ZS | SELL · 10b5-1 | 2024-12-17 | 2024-12-19 | $196.95 | $2.0M | +0.5% | +6.1% | +12.8% |
| ZS | SELL · 10b5-1 | 2024-10-09 | 2024-10-10 | $181.70 | $261K | -4.7% | +2.2% | -4.1% |
| ZS | SELL · 10b5-1 | 2024-09-30 | 2024-10-01 | $170.19 | $1.7M | +18.9% | +8.4% | +9.8% |
| ZS | SELL | 2024-09-17 | 2024-09-18 | $171.28 | $2.1M | -1.1% | +10.0% | +16.0% |
| ZS | SELL · 10b5-1 | 2024-06-20 | 2024-09-24 | $178.63 | $1.4M | +0.0% | +5.8% | +6.9% |
| ZS | SELL · 10b5-1 | 2024-06-18 | 2024-06-20 | $179.54 | $2.5M | +9.9% | +5.3% | -5.9% |
| ZS | SELL · 10b5-1 | 2024-03-18 | 2024-03-20 | $193.56 | $3.6M | -5.4% | -15.2% | -10.1% |
| ZS | SELL · 10b5-1 | 2023-12-18 | 2023-12-19 | $222.30 | $4.0M | -4.6% | +2.4% | -12.0% |
| ZS | SELL · 10b5-1 | 2023-09-25 | 2023-09-26 | $149.47 | $1.2M | +9.3% | +3.3% | +50.1% |
| ZS | SELL · 10b5-1 | 2023-09-18 | 2023-09-19 | $154.35 | $1.9M | +0.2% | +8.9% | +43.3% |
| ZS | SELL · 10b5-1 | 2023-06-16 | 2023-06-20 | $155.69 | $2.0M | -1.6% | -0.5% | +4.1% |
| ZS | SELL · 10b5-1 | 2023-06-06 | 2023-06-07 | $150.00 | $374K | +1.5% | -2.2% | +11.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.