SNDX SEC Form 4 filings
Syndax Pharmaceuticals Inc Latest Insider Trading Activity
Over the past 859 days, Syndax Pharmaceuticals Inc (SNDX) has had 11 total open-market insider transactions represented in the displayed records. The latest displayed record by transaction date reports 2 sales by Botwood Nicholas A.J. (Syndax Pharmaceuticals Inc Head of R&D, CMO) totaling 65,515 shares at a weighted-average price of $18.07 per share, with the latest transaction dated June 12, 2026. This page shows up to the 10 most recent SEC Form 4 filing records on a 6-hour delay. Sign up for real-time updates and access to 20 years of historic insider trading data.
Insider Trading For SNDX Charted on Daily Candles. Scroll left or zoom out to load earlier candles (up to 2 years).
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| Ticker | Filing Date | Transaction Date | Company | Insider | Title | Transaction | Trade Count | Shares | Avg. Price | Total Value | Position Size Change | SEC Filing |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 10b5-1: Scheduled Form 4 Transaction SNDX | 2026-06-12 | 2026-06-12 | Syndax Pharmaceuticals Inc | Botwood Nicholas A.J. | Head of R&D, CMO | Sell | 2 | 65,515 | $18.07 | $1,183,642.90 | 34.98% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting SNDX | 2026-06-02 | 2026-06-01 | Syndax Pharmaceuticals Inc | Metzger Michael A | Chief Executive Officer | Sell | 1 | 6,847 | $18.99 | $130,024.53 | 1.39% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting SNDX | 2026-02-10 | 2026-02-09 | Syndax Pharmaceuticals Inc | Metzger Michael A | Chief Executive Officer | Sell | 1 | 17,159 | $21.03 | $360,853.77 | 3.37% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting SNDX | 2026-02-10 | 2026-02-09 | Syndax Pharmaceuticals Inc | Goldan Keith A. | Chief Financial Officer | Sell | 1 | 3,410 | $21.03 | $71,712.30 | 2.37% | View Filing |
| Tax liability coverage transfers: shares are often sold to offset the tax liability from shares vesting SNDX | 2026-02-06 | 2026-02-06 | Syndax Pharmaceuticals Inc | Goldan Keith A. | Chief Financial Officer | Sell | 1 | 2,082 | $20.62 | $42,930.84 | 1.43% | View Filing |
| 10b5-1: Scheduled Form 4 Transaction SNDX | 2025-09-08 | 2025-09-08 | Syndax Pharmaceuticals Inc | Metzger Michael A | Chief Executive Officer | Sell | 1 | 157,307 | $16.41 | $2,581,407.87 | 34.50% | View Filing |
| Unexplained: transactions without an ESPP, DRIP, 10b5-1, tax liability, or Explained M/S tag. SNDX | 2025-05-19 | 2025-05-19 | Syndax Pharmaceuticals Inc | Huber Martin H. Jr. | Director | Buy | 1 | 5,000 | $8.99 | $44,950.00 | 6.33% | View Filing |
| Unexplained: transactions without an ESPP, DRIP, 10b5-1, tax liability, or Explained M/S tag. SNDX | 2025-05-19 | 2025-05-19 | Syndax Pharmaceuticals Inc | Katkin Keith | Director | Buy | 1 | 10,000 | $9.11 | $91,100.00 | 10.00% | View Filing |
| Unexplained: transactions without an ESPP, DRIP, 10b5-1, tax liability, or Explained M/S tag. SNDX | 2025-05-19 | 2025-05-16 | Syndax Pharmaceuticals Inc | Botwood Nicholas A.J. | Head of R&D, CMO | Buy | 1 | 11,765 | $9.00 | $105,885.00 | 33.46% | View Filing |
| Unexplained: transactions without an ESPP, DRIP, 10b5-1, tax liability, or Explained M/S tag. SNDX | 2024-06-17 | 2024-06-14 | Syndax Pharmaceuticals Inc | Goldan Keith A. | Chief Financial Officer | Buy | 1 | 1,250 | $20.03 | $25,037.50 | 2.38% | View Filing |
⚠️ THE SAMPLE ABOVE IS DEFERRED BY 6 HOURS ⚠️
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