Syndax Pharmaceuticals (SNDX) options flow
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Options flow session · Last trade
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SNDX session snapshot
Bullflow recorded 8 SNDX options trades on Wednesday, October 28, 2026, totaling $292,370 in premium. Calls made up $0.00 (0.0%) across 0 trades and puts $292.37K (100.0%) across 8 trades.
8 trades were sweeps and 0 were blocks. 7 filled at or above the ask, 1 at or below the bid and 0 at the mid. The largest was a $48,320 sweep of 151 Jan 21, 2028 $13 Put trade at 14:05:07 ET, filled at the ask.
SNDX closed at $14.32, up 4.60% from the prior close.
- Company
- Syndax Pharmaceuticals, Inc.
- Exchange
- NASDAQ
- Sector
- Unavailable
- Close
- $14.32
SNDX options flow statistics
- Total premium
- $292.37K
- Recorded trades
- 8
- Call premium
- $0.00
- Put premium
- $292.37K
- Put/call premium ratio
- Unavailable (no call premium)
- Avg premium per trade
- $36.55K
- Calls / puts (trades)
- 0 / 8
- Sweeps / blocks
- 8 / 0
- At or above ask
- 7
- At or below bid
- 1
- Largest trade
- $48.32K
- Last trade
Where the premium went
in calls
$292.37K · 8 trades
Premium
Trade type
Fill side
SNDX largest options trades
| Time | Contract | C/P | Premium | Size | Fill | Type |
|---|---|---|---|---|---|---|
| SNDX Jan 21, 2028 $13 | Put | $48,320 | 151 | Ask | Sweep | |
| SNDX Jan 21, 2028 $13 | Put | $47,680 | 149 | Bid | Sweep | |
| SNDX Jan 21, 2028 $13 | Put | $44,160 | 138 | Ask | Sweep | |
| SNDX Jan 21, 2028 $13 | Put | $43,840 | 137 | Ask | Sweep | |
| SNDX Jan 21, 2028 $13 | Put | $36,800 | 115 | Ask | Sweep | |
| SNDX Jan 21, 2028 $13 | Put | $24,320 | 76 | Ask | Sweep | |
| SNDX Jan 21, 2028 $13 | Put | $24,000 | 75 | Ask | Sweep | |
| SNDX Jan 21, 2028 $13 | Put | $23,250 | 75 | Ask | Sweep |
8 of the 8 largest trades, $292.37K combined
The 8 largest trades total $292.37K of $292.37K
SNDX gamma exposure
Gamma exposure is separate from this closing options flow summary. Additional data appears in the interactive view when available.
SNDX options flow questions
What was the largest SNDX options trade on October 28, 2026?
A $48,320 sweep of 151 SNDX Jan 21, 2028 $13 Put trade at 14:05:07 ET, filled at the ask. It was the largest of 8 trades Bullflow recorded for SNDX that session.
How much SNDX options premium traded on October 28, 2026?
$292,370 across 8 recorded sweeps and blocks: $0 in calls (0 trades) and $292,370 in puts (8 trades).
Was SNDX options flow bullish or bearish on October 28, 2026?
Calls were 0.0% of premium. 1 of 8 trades filled at or below the bid and 7 at or above the ask. Premium and fill side do not show whether a trade opened or closed a position or was a hedge, so they do not establish direction on their own.
How often is SNDX options flow data updated?
The page shows a completed session (October 28, 2026, last trade 14:05:11 ET) and updates after the next trading day becomes historical. Intraday SNDX flow is in the Bullflow dashboard and API.
How to read this data
This summary covers recorded single-leg sweeps and blocks with positive premium, excluding cancelled trades. It describes the covered flow, not all options-market volume. Total premium is gross traded premium; it is not net buying pressure. The interactive dashboard can use different filters and may show different totals.
Calls, puts, and execution near the bid or ask provide context but do not establish whether a position was opened or closed, whether it was part of a hedge, or where the stock will move next. The session updates after the next trading day becomes historical.
Stock prices show regular-session candles delayed at least 15 minutes. The latest view refreshes during market hours; the flow-session view places recorded trades on their original date, using interpolated stock prices between candle samples. Gamma exposure shows its separately dated public closing snapshot.