Robert Schlossman
Insider
First SEC filing: March 15, 2018 · Latest: March 15, 2018
Insider at
Insider transactions
0 buys (P)
8 sells (S)
Net: $-4,596,052
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Sept. 21, 2026 | ZS | S 10b5-1 | 5,394 | $200.00 | $1,078,800 | 61,525 Direct | -8.06% | Disposed | 1.2% (price as of 2026-10-05) |
| Sept. 16, 2026 | ZS | S | 2,325 | $192.76 | $448,167 | 66,919 Direct | -3.36% | Disposed | 5.0% (price as of 2026-10-05) |
| July 6, 2026 | ZS | S 10b5-1 | 122 | $150.00 | $18,300 | 69,244 Direct | -0.18% | Disposed | 35.0% (price as of 2026-10-05) |
| June 16, 2026 | ZS | S | 3,146 | $126.43 | $397,749 | 69,366 Direct | -4.34% | Disposed | 60.2% (price as of 2026-10-05) |
| March 17, 2026 | ZS | S | 2,263 | $156.59 | $354,363 | 72,390 Direct | -3.03% | Disposed | 29.3% (price as of 2026-10-05) |
| Dec. 17, 2025 | ZS | S 10b5-1 | 2,349 | $232.79 | $546,824 | 74,653 Direct | -3.05% | Disposed | -13.0% (price as of 2026-10-05) |
| Dec. 16, 2025 | ZS | S | 3,084 | $230.82 | $711,849 | 77,002 Direct | -3.85% | Disposed | -12.3% (price as of 2026-10-05) |
| Oct. 24, 2025 | ZS | S 10b5-1 | 3,200 | $325.00 | $1,040,000 | 80,086 Direct | -3.84% | Disposed | -37.7% (price as of 2026-10-05) |
| Oct. 15, 2025 | ZS | A | 7,154 | · | · | 83,286 Direct | +9.40% | Acquired | (price as of 2026-10-05) |
| Oct. 2, 2025 | ZS | S 10b5-1 | 700 | $302.92 | $212,044 | 82,438 Direct | -0.84% | Disposed | -33.2% (price as of 2026-10-05) |
| Oct. 2, 2025 | ZS | S 10b5-1 | 900 | $304.00 | $273,600 | 81,538 Direct | -1.09% | Disposed | -33.4% (price as of 2026-10-05) |
| Oct. 2, 2025 | ZS | S 10b5-1 | 300 | $304.67 | $91,401 | 81,238 Direct | -0.37% | Disposed | -33.5% (price as of 2026-10-05) |
| Oct. 2, 2025 | ZS | S 10b5-1 | 4,532 | $306.12 | $1,387,336 | 76,706 Direct | -5.58% | Disposed | -33.9% (price as of 2026-10-05) |
| Oct. 2, 2025 | ZS | S 10b5-1 | 574 | $307.47 | $176,488 | 76,132 Direct | -0.75% | Disposed | -34.1% (price as of 2026-10-05) |
| Sept. 16, 2025 | ZS | S | 3,832 | $280.70 | $1,075,642 | 83,138 Direct | -4.41% | Disposed | -27.9% (price as of 2026-10-05) |
| Sept. 15, 2025 | ZS | G | 2,000 | · | · | 86,970 Direct | -2.25% | Disposed | (price as of 2026-10-05) |
| June 18, 2025 | ZS | S 10b5-1 | 1,660 | $304.64 | $505,702 | 90,484 Direct | -1.80% | Disposed | -33.5% (price as of 2026-10-05) |
| June 18, 2025 | ZS | S 10b5-1 | 200 | $303.46 | $60,692 | 90,284 Direct | -0.22% | Disposed | -33.3% (price as of 2026-10-05) |
| June 18, 2025 | ZS | S 10b5-1 | 1,014 | $305.60 | $309,878 | 89,270 Direct | -1.12% | Disposed | -33.7% (price as of 2026-10-05) |
| June 18, 2025 | ZS | S 10b5-1 | 300 | $306.77 | $92,031 | 88,970 Direct | -0.34% | Disposed | -34.0% (price as of 2026-10-05) |
| June 17, 2025 | ZS | S 10b5-1 | 3,590 | $303.70 | $1,090,283 | 92,144 Direct | -3.75% | Disposed | -33.3% (price as of 2026-10-05) |
| June 4, 2025 | ZS | S 10b5-1 | 4,618 | $300.00 | $1,385,400 | 95,612 Direct | -4.61% | Disposed | -32.5% (price as of 2026-10-05) |
| May 16, 2025 | ZS | S 10b5-1 | 3,590 | $250.00 | $897,500 | 100,230 Direct | -3.46% | Disposed | -19.0% (price as of 2026-10-05) |
| March 19, 2025 | ZS | S 10b5-1 | 300 | $202.17 | $60,651 | 107,287 Direct | -0.28% | Disposed | 0.2% (price as of 2026-10-05) |
| March 19, 2025 | ZS | S 10b5-1 | 1,067 | $203.44 | $217,070 | 106,220 Direct | -0.99% | Disposed | -0.5% (price as of 2026-10-05) |
| March 19, 2025 | ZS | S 10b5-1 | 2,100 | $204.30 | $429,030 | 104,120 Direct | -1.98% | Disposed | -0.9% (price as of 2026-10-05) |
| March 19, 2025 | ZS | S 10b5-1 | 300 | $205.52 | $61,656 | 103,820 Direct | -0.29% | Disposed | -1.5% (price as of 2026-10-05) |
| March 18, 2025 | ZS | S | 2,878 | $199.15 | $573,154 | 107,587 Direct | -2.61% | Disposed | 1.7% (price as of 2026-10-05) |
| Dec. 18, 2024 | ZS | S 10b5-1 | 535 | $186.08 | $99,553 | 112,965 Direct | -0.47% | Disposed | 8.8% (price as of 2026-10-05) |
| Dec. 18, 2024 | ZS | S 10b5-1 | 200 | $187.44 | $37,488 | 112,765 Direct | -0.18% | Disposed | 8.0% (price as of 2026-10-05) |
| Dec. 18, 2024 | ZS | S 10b5-1 | 100 | $188.68 | $18,868 | 112,665 Direct | -0.09% | Disposed | 7.3% (price as of 2026-10-05) |
| Dec. 18, 2024 | ZS | S 10b5-1 | 500 | $190.82 | $95,410 | 112,165 Direct | -0.44% | Disposed | 6.1% (price as of 2026-10-05) |
| Dec. 18, 2024 | ZS | S 10b5-1 | 500 | $192.42 | $96,210 | 111,665 Direct | -0.45% | Disposed | 5.2% (price as of 2026-10-05) |
| Dec. 18, 2024 | ZS | S 10b5-1 | 700 | $193.50 | $135,450 | 110,965 Direct | -0.63% | Disposed | 4.6% (price as of 2026-10-05) |
| Dec. 18, 2024 | ZS | S 10b5-1 | 200 | $194.63 | $38,926 | 110,765 Direct | -0.18% | Disposed | 4.0% (price as of 2026-10-05) |
| Dec. 18, 2024 | ZS | S 10b5-1 | 100 | $197.03 | $19,703 | 110,665 Direct | -0.09% | Disposed | 2.8% (price as of 2026-10-05) |
| Dec. 18, 2024 | ZS | S 10b5-1 | 200 | $199.72 | $39,944 | 110,465 Direct | -0.18% | Disposed | 1.4% (price as of 2026-10-05) |
| Dec. 17, 2024 | ZS | S | 3,258 | $200.32 | $652,643 | 113,500 Direct | -2.79% | Disposed | 1.1% (price as of 2026-10-05) |
| Dec. 5, 2024 | ZS | A | 10,952 | · | · | 116,758 Direct | +10.35% | Acquired | (price as of 2026-10-05) |
| Oct. 9, 2024 | ZS | S 10b5-1 | 947 | $180.00 | $170,460 | 106,294 Direct | -0.88% | Disposed | 12.5% (price as of 2026-10-05) |
| Oct. 9, 2024 | ZS | S 10b5-1 | 488 | $185.00 | $90,280 | 105,806 Direct | -0.46% | Disposed | 9.5% (price as of 2026-10-05) |
| Sept. 30, 2024 | ZS | S 10b5-1 | 3,820 | $169.99 | $649,362 | 108,368 Direct | -3.40% | Disposed | 19.1% (price as of 2026-10-05) |
| Sept. 30, 2024 | ZS | S 10b5-1 | 939 | $170.79 | $160,372 | 107,429 Direct | -0.87% | Disposed | 18.6% (price as of 2026-10-05) |
| Sept. 30, 2024 | ZS | S 10b5-1 | 188 | $172.11 | $32,357 | 107,241 Direct | -0.17% | Disposed | 17.7% (price as of 2026-10-05) |
| Sept. 17, 2024 | ZS | S | 6,220 | $171.28 | $1,065,362 | 112,401 Direct | -5.24% | Disposed | 18.2% (price as of 2026-10-05) |
| June 20, 2024 | ZS | S 10b5-1 | 3,911 | $178.63 | $698,622 | 118,780 Direct | -3.19% | Disposed | 13.4% (price as of 2026-10-05) |
| June 20, 2024 | ZS | S | 372 | $179.20 | $66,662 | 118,408 Direct | -0.31% | Disposed | 13.0% (price as of 2026-10-05) |
| June 20, 2024 | ZS | S | 1,990 | $176.97 | $352,170 | 123,267 Direct | -1.59% | Disposed | 14.4% (price as of 2026-10-05) |
| June 20, 2024 | ZS | S 10b5-1 | 200 | $176.19 | $35,238 | 123,067 Direct | -0.16% | Disposed | 14.9% (price as of 2026-10-05) |
| June 20, 2024 | ZS | S 10b5-1 | 376 | $177.72 | $66,823 | 122,691 Direct | -0.31% | Disposed | 13.9% (price as of 2026-10-05) |
| June 20, 2024 | ZS | S 10b5-1 | 3,698 | $178.64 | $660,611 | 118,993 Direct | -3.01% | Disposed | 13.4% (price as of 2026-10-05) |
| June 20, 2024 | ZS | S 10b5-1 | 372 | $179.20 | $66,662 | 118,621 Direct | -0.31% | Disposed | 13.0% (price as of 2026-10-05) |
| June 18, 2024 | ZS | S | 3,594 | $180.93 | $650,262 | 125,257 Direct | -2.79% | Disposed | 11.9% (price as of 2026-10-05) |
| June 17, 2024 | ZS | G | 1,000 | · | · | 128,638 Direct | -0.77% | Disposed | (price as of 2026-10-05) |
| June 10, 2024 | ZS | A | 11,144 | · | · | 129,638 Direct | +9.40% | Acquired | (price as of 2026-10-05) |
| March 19, 2024 | ZS | S 10b5-1 | 1,127 | $191.63 | $215,967 | 122,851 Direct | -0.91% | Disposed | 5.7% (price as of 2026-10-05) |
| March 19, 2024 | ZS | S 10b5-1 | 703 | $192.54 | $135,356 | 122,148 Direct | -0.57% | Disposed | 5.2% (price as of 2026-10-05) |
| March 19, 2024 | ZS | S 10b5-1 | 700 | $193.65 | $135,555 | 121,448 Direct | -0.57% | Disposed | 4.6% (price as of 2026-10-05) |
| March 19, 2024 | ZS | S 10b5-1 | 2,547 | $195.01 | $496,690 | 118,901 Direct | -2.10% | Disposed | 3.8% (price as of 2026-10-05) |
| March 19, 2024 | ZS | S 10b5-1 | 407 | $195.70 | $79,650 | 118,494 Direct | -0.34% | Disposed | 3.5% (price as of 2026-10-05) |
| March 18, 2024 | ZS | S | 4,227 | $193.15 | $816,445 | 123,978 Direct | -3.30% | Disposed | 4.8% (price as of 2026-10-05) |
| Dec. 19, 2023 | ZS | S 10b5-1 | 1,216 | $222.10 | $270,074 | 131,819 Direct | -0.91% | Disposed | -8.8% (price as of 2026-10-05) |
| Dec. 19, 2023 | ZS | S 10b5-1 | 800 | $223.04 | $178,432 | 131,019 Direct | -0.61% | Disposed | -9.2% (price as of 2026-10-05) |
| Dec. 19, 2023 | ZS | S 10b5-1 | 2,414 | $224.02 | $540,784 | 128,605 Direct | -1.84% | Disposed | -9.6% (price as of 2026-10-05) |
| Dec. 19, 2023 | ZS | S 10b5-1 | 400 | $224.78 | $89,912 | 128,205 Direct | -0.31% | Disposed | -9.9% (price as of 2026-10-05) |
| Dec. 18, 2023 | ZS | S | 4,877 | $221.34 | $1,079,475 | 133,035 Direct | -3.54% | Disposed | -8.5% (price as of 2026-10-05) |
| Nov. 13, 2023 | ZS | A | 12,112 | · | · | 137,912 Direct | +9.63% | Acquired | (price as of 2026-10-05) |
| Sept. 25, 2023 | ZS | S 10b5-1 | 1,172 | $150.89 | $176,843 | 128,483 Direct | -0.90% | Disposed | 34.2% (price as of 2026-10-05) |
| Sept. 25, 2023 | ZS | S 10b5-1 | 2,683 | $148.85 | $399,365 | 125,800 Direct | -2.09% | Disposed | 36.0% (price as of 2026-10-05) |
| Sept. 19, 2023 | ZS | S 10b5-1 | 1,109 | $153.90 | $170,675 | 129,655 Direct | -0.85% | Disposed | 31.6% (price as of 2026-10-05) |
| Sept. 18, 2023 | ZS | S | 5,013 | $154.45 | $774,258 | 130,764 Direct | -3.69% | Disposed | 31.1% (price as of 2026-10-05) |
| June 20, 2023 | ZS | S 10b5-1 | 1,322 | $152.11 | $201,089 | 135,777 Direct | -0.96% | Disposed | 33.1% (price as of 2026-10-05) |
| June 16, 2023 | ZS | G | 1,000 | · | · | 141,899 Direct | -0.70% | Disposed | (price as of 2026-10-05) |
| June 16, 2023 | ZS | S | 5,013 | $156.64 | $785,236 | 137,099 Direct | -3.53% | Disposed | 29.3% (price as of 2026-10-05) |
| June 6, 2023 | ZS | S 10b5-1 | 2,496 | $150.00 | $374,400 | 142,899 Direct | -1.72% | Disposed | 35.0% (price as of 2026-10-05) |
| April 28, 2023 | ZS | A | 12,842 | · | · | 145,395 Direct | +9.69% | Acquired | (price as of 2026-10-05) |
| March 16, 2023 | ZS | S | 3,645 | $106.79 | $389,250 | 132,553 Direct | -2.68% | Disposed | 89.6% (price as of 2026-10-05) |
| Dec. 16, 2022 | ZS | S | 5,081 | $114.14 | $579,945 | 136,198 Direct | -3.60% | Disposed | 77.4% (price as of 2026-10-05) |
| Oct. 18, 2022 | ZS | S 10b5-1 | 3,825 | $150.83 | $576,925 | 141,279 Direct | -2.64% | Disposed | 34.3% (price as of 2026-10-05) |
| Oct. 17, 2022 | ZS | A | 9,723 | · | · | 145,104 Direct | +7.18% | Acquired | (price as of 2026-10-05) |
| Sept. 16, 2022 | ZS | S | 8,045 | $167.97 | $1,351,319 | 135,381 Direct | -5.61% | Disposed | 20.6% (price as of 2026-10-05) |
| Sept. 14, 2022 | ZS | A | 30,804 | · | · | 143,426 Direct | +27.35% | Acquired | (price as of 2026-10-05) |
| June 21, 2022 | ZS | S 10b5-1 | 239 | $150.00 | $35,850 | 112,622 Direct | -0.21% | Disposed | 35.0% (price as of 2026-10-05) |
| June 16, 2022 | ZS | S | 4,184 | $136.67 | $571,827 | 112,861 Direct | -3.57% | Disposed | 48.2% (price as of 2026-10-05) |
| March 16, 2022 | ZS | S | 3,157 | $203.09 | $641,155 | 117,406 Direct | -2.62% | Disposed | -0.3% (price as of 2026-10-05) |
| Dec. 22, 2021 | ZS | G | 600 | · | · | 116,806 Direct | -0.51% | Disposed | (price as of 2026-10-05) |
| Dec. 16, 2021 | ZS | S | 3,949 | $300.01 | $1,184,739 | 120,563 Direct | -3.17% | Disposed | -32.5% (price as of 2026-10-05) |
| Oct. 18, 2021 | ZS | M | 4,000 | $4.40 | $17,600 | 128,512 Direct | +3.21% | Acquired | 4502.0% (price as of 2026-10-05) |
| Oct. 18, 2021 | ZS | S 10b5-1 | 4,000 | $300.01 | $1,200,040 | 124,512 Direct | -3.11% | Disposed | -32.5% (price as of 2026-10-05) |
| Oct. 18, 2021 | ZS | M | 4,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Sept. 21, 2021 | ZS | M | 28,000 | $4.40 | $123,200 | 152,512 Direct | +22.49% | Acquired | 4502.0% (price as of 2026-10-05) |
| Sept. 21, 2021 | ZS | S 10b5-1 | 1,000 | $270.09 | $270,090 | 151,512 Direct | -0.66% | Disposed | -25.0% (price as of 2026-10-05) |
| Sept. 21, 2021 | ZS | S 10b5-1 | 6,912 | $271.66 | $1,877,714 | 144,600 Direct | -4.56% | Disposed | -25.5% (price as of 2026-10-05) |
| Sept. 21, 2021 | ZS | S 10b5-1 | 14,395 | $272.51 | $3,922,781 | 130,205 Direct | -9.96% | Disposed | -25.7% (price as of 2026-10-05) |
| Sept. 21, 2021 | ZS | S 10b5-1 | 4,584 | $273.55 | $1,253,953 | 125,621 Direct | -3.52% | Disposed | -26.0% (price as of 2026-10-05) |
| Sept. 21, 2021 | ZS | S 10b5-1 | 1,109 | $274.36 | $304,265 | 124,512 Direct | -0.88% | Disposed | -26.2% (price as of 2026-10-05) |
| Sept. 21, 2021 | ZS | M | 28,000 | · | · | 4,000 Direct | -87.50% | Disposed | (price as of 2026-10-05) |
| Sept. 17, 2021 | ZS | S 10b5-1 | 1,000 | $270.55 | $270,550 | 127,367 Direct | -0.78% | Disposed | -25.2% (price as of 2026-10-05) |
| Sept. 17, 2021 | ZS | S 10b5-1 | 1,020 | $271.50 | $276,930 | 126,347 Direct | -0.80% | Disposed | -25.4% (price as of 2026-10-05) |
| Sept. 16, 2021 | ZS | S | 3,920 | $268.97 | $1,054,362 | 128,367 Direct | -2.96% | Disposed | -24.7% (price as of 2026-10-05) |
Showing latest 100 of 261 transactions
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| Oct. 18, 2021 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 4,000 | Disposed |
| Sept. 21, 2021 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 28,000 | Disposed |
| Oct. 8, 2020 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 21,000 | Disposed |
| Aug. 3, 2020 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 40,000 | Disposed |
| June 1, 2020 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 3,000 | Disposed |
| May 29, 2020 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 35,000 | Disposed |
| May 8, 2020 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 10,900 | Disposed |
| May 7, 2020 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 4,100 | Disposed |
| May 1, 2020 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 2,000 | Disposed |
| April 16, 2020 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 1,659 | Disposed |
| April 15, 2020 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 13,341 | Disposed |
| April 1, 2020 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 2,000 | Disposed |
| March 2, 2020 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 2,000 | Disposed |
| Feb. 3, 2020 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 2,000 | Disposed |
| Jan. 8, 2020 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 2,000 | Disposed |
| Dec. 2, 2019 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 2,000 | Disposed |
| Nov. 25, 2019 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 2,000 | Disposed |
| Aug. 1, 2019 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 55,000 | Disposed |
| May 1, 2019 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 55,000 | Disposed |
| March 5, 2019 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 10,000 | Disposed |
| Feb. 1, 2019 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 45,000 | Disposed |
| Nov. 2, 2018 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 35,000 | Disposed |
| Nov. 1, 2018 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 10,000 | Disposed |
| Sept. 12, 2018 | ZS | Employee Stock Option (right to buy) | Common Stock | $4.40 | Jan. 15, 2023 | 45,000 | Disposed |
| Nov. 5, 2008 | EXTR | Non-Qualified Stock Option (right to buy) | Common Stock | $2.05 | Nov. 5, 2018 | 250,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 3 holdings
Securities held when first becoming an insider, per SEC Form 3.
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2007 | · | · | · | · | · | · | · | · |
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2020 | $315,000 | · | $4,454,791 | · | $173,494 | · | · | $4,943,285 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.