Avis Budget Group (CAR)
Published 2026-03-16 • by yetanothervalueblog
Thesis Summary
Aggressive insider buying via synthetic longs by a reputable investor (Pentwater) in a tightly held stock with significant short interest suggests potential volatility.
Quantitative Overlay
Detailed Deep Dive
Recently, Pentwater has been aggressively buying Avis (CAR). But it’s not the buying itself that’s interesting; it’s how they’re doing it. Consider this form 4:
CAR’s stock has been trading for ~$95/share for most of this month. For some reason, Pentwater has decided a synthetic long (buying a call and selling a put at the same strike) is a better way to increase exposure than simply buying the stock. I’m sure Pentwater is a lot smarter than me and there’s a reason they chose that specific structure to increase their exposure to the stock…. but I’d be remiss if I didn’t note that CAR is a very tightly held stock as SRS and Pentwater now hold >60% of the stock between them.
Bloomberg tells me almost 50% of CAR’s free float is sold short; could Pentwater’s synthetic long create some fireworks (read: short squeeze) once they take delivery? And, on a fundamental level, it’s been a rough few years for rental cars…. is Pentwater seeing something in the data that suggests the capital cycle is about to turn? The combo of tightly held + lots of short interest + trough-ish cycle + a history of aggressive capital return from CAR could cause things to get spicy very quickly….