Notable Monday Option Activity: COST, ANAB, THS

AnaptysBio Inc (ANAB) and TreeHouse Foods Inc (THS) are experiencing significantly elevated options trading volumes today, with ANAB's options volume at 140.6% and THS's at 138.1% of their respective average daily share trading volumes. Notably, ANAB saw substantial activity in its January 2026 $30 strike put options, while THS observed high volume in its November 2025 $22.50 strike call options, indicating potential directional bets or hedging strategies by market participants for both equities.

Analysis

AnaptysBio Inc (ANAB) and TreeHouse Foods Inc (THS) are exhibiting significantly elevated options trading volumes today, with ANAB's volume reaching 140.6% and THS's at 138.1% of their respective average daily share trading volumes over the past month. This surge in derivatives activity suggests heightened market interest in both equities, indicating potential future price movements or significant hedging.

Specifically, ANAB saw substantial trading in its January 16, 2026, $30 strike put options, with 3,810 contracts traded, representing 381,000 underlying shares. Concurrently, THS experienced notable volume in its November 21, 2025, $22.50 strike call options, with 1,737 contracts traded, corresponding to 173,700 underlying shares.

The concentration of volume in long-dated put options for ANAB could indicate bearish sentiment or hedging against potential downside risk. Conversely, the high volume in long-dated call options for THS may signal bullish expectations or positioning for upside price movements. While the general sentiment is neutral, the observed options flow suggests market participants are actively positioning for future events.

Key Decisions for Investors

• Investors should closely monitor ANAB and THS for potential catalysts that could be driving this elevated, directional options activity, as high options volume often precedes or accompanies significant news.