Insider profile
Tien Tzuo Insider Trading
This page tracks every SEC Form 4 filing since April 2023 by Tien Tzuo, Chairman and CEO: 132 transactions in total, none of them an open-market purchase, and 17 sales. Each record is parsed directly from the original filing, with amendments reconciled so a corrected filing never double-counts.
- Role
- Chairman and CEO
- CIK
- 0001735409
- Companies traded
- 1
- Total filings
- 132
- First filing
- 2023-03-31
- Last filing
- 2026-07-05
Files as Tzuo Tien · SEC EDGAR ↗
Activity summary
The most recent open-market decision was a sale of 49,041 shares ($488K) on January 10, 2025.
Three year balance
Buy and sell value by quarter, Q4 23 to Q3 26. Tien Tzuo has been a net seller across the period shown.
Bars below the rule are sales, above are purchases. Largest quarter on the chart is $96.3M.
Insider insight
Tien Tzuo trades most actively in ZUO, accounting for 2 of the 132 filings on record.
Track record
Most active in
Transaction History
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jul 5, 2026 | Tien Tzuo | AMPL | Award | 1,521 | — | — |
| Apr 5, 2026 | Tien Tzuo | AMPL | Award | 1,538 | — | — |
| Jan 5, 2026 | Tien Tzuo | AMPL | Award | 999 | — | — |
| Oct 5, 2025 | Tien Tzuo | AMPL | Award | 977 | — | — |
| Jul 5, 2025 | Tien Tzuo | AMPL | Award | 894 | — | — |
45 more transactions hidden
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Query this yourself
The same rows, over the API.
curl "https://api.form4api.com/v1/insiders/0001735409/transactions" \
-H "X-Api-Key: $KEY"Companies traded
By number of filings.
Based on the last 50 filings on file — this insider has a longer history.
Filing cadence
Filings per quarter, this window.
Busiest: Q3 24 (17 filings)
Quietest: Q2 25 (1 filing)
Based on the last 50 filings on file — this insider has a longer history.
Reading an insider's Form 4 history
Corporate insiders — directors, officers, and holders of more than 10% of a company's stock — must report their trades to the SEC on Form 4 within two business days. Looking at one insider's filings over time shows whether they tend to buy on the open market (a discretionary use of their own money, generally the strongest signal), sell, or simply receive and exercise equity awards as compensation.
The track record above measures how this insider's past open-market purchases performed in the months after each filing. Trades made under a pre-scheduled Rule 10b5-1 plan are flagged because they carry no timing signal. To pull any insider's full history programmatically, see the insider trading API or our guide to reading Form 4 filings.