Tracking RGEN? Get live short interest, options flow, and signals on ORTEX.Sign up free →

Repligen Corporation (RGEN) short interest & options flow

NASDAQ

RGEN fell 7.7% on Tuesday to close at $174.86, its worst single-day performance in months, leaving the stock down 10.1% for the week despite a Barclays analyst raising his price target to $225 the same morning. That gap between analyst conviction and price action is the tension worth watching this week. The most striking data point arrived before the open on October 7, when…

$178.88+1.39% 1d+1.97% 1w+1.12% 1mClose: 20 Oct 2026

Short interest % of float: High
Cost to borrow: Low

Market cap: $9.96B
Next earnings: 27 Oct 2026

See the full picture on ORTEX →Live short interest, options flow, signals, 13F filings, and more.

Key data as of 21 Oct 2026

ORTEX chart of Repligen Corporation (RGEN) share price and short interest (% of free float), six months to October 20, 2026

RGEN news and analysis

RSS

No long-form analysis yet for RGEN. Pulse alerts and the live data picture are available on ORTEX.

Open RGEN on ORTEX →

Want the live picture for RGEN?

Short interest updated daily, real-time options flow, analyst consensus deltas, 13F positioning, ORTEX Alpha signals, and every article ORTEX publishes for RGEN — free to start on ORTEX.