Illustration for: TRex Bio Prices IPO At $14, Raises $116.7M

TRex Bio Prices IPO At $14, Raises $116.7M

TRex Bio priced its IPO at $14.00 per share, the low end of its range, selling 8.33 million shares for about $116.7 million before trading began on Nasdaq as TRXB.

By the Numbers

$14.00/share
Price
8.33M
Shares sold
~$116.7M
Gross proceeds
TRXB (Nasdaq)
Ticker
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THE RUNDOWN

1

Pricing at the low end of its $14-16 range shows TRex Bio found enough demand to complete the deal but not enough to price above or mid-range.

2

TRex Bio is one of at least four biotechs pricing or setting terms for Nasdaq IPOs this same week, alongside Retension Pharmaceuticals, City Therapeutics and Iambic Therapeutics.

3

The 30-day option for 1.25 million additional shares gives underwriters room to stabilize the stock if it trades weak in its first days.

4

A completed low-end pricing, rather than a pulled or repriced deal, is itself a data point on biotech IPO demand after Firmus's AI-infrastructure IPO collapsed the same week.

The VC Read

Value Add VC analysis

Low-end pricing isn't a failure here -- it's a completed deal in a week when Firmus just walked away from a much bigger one entirely. The real tell is what TRXB does in its first three trading days: a hold above $14 validates demand for clinical-stage Treg biology specifically, while a break below issue price would be a second data point, after Firmus, that public investors are getting pickier across the board.

Analysis

TRex Bio priced its initial public offering at $14.00 per share -- the low end of its marketed $14.00-$16.00 range -- selling 8,333,334 shares for gross proceeds of about $116.7 million, according to a company announcement. Shares began trading October 9 on the Nasdaq Global Select Market under the ticker TRXB, with an expected close date of October 13.

Pulse covered TRex Bio's original S-1 filing on September 21, when the clinical-stage biotech first disclosed plans to go public alongside Retension Pharmaceuticals. What's changed: the company has now completed the deal, pricing at the bottom of its range rather than the midpoint or top, with J.P. Morgan, Evercore ISI, Cantor and Stifel as lead bookrunners and Wedbush PacGrow as bookrunner. Underwriters hold a 30-day option on up to 1.25 million additional shares.

“Underwriters hold a 30-day option on up to 1.25 million additional shares.”

TRex Bio's Deep Biology Platform focuses on tissue Treg (regulatory T-cell) biology, aiming to develop immune-regulating drugs for autoimmune and inflammatory disease. Pricing at the low end of the range, rather than pulling the deal entirely, suggests investors found the story credible but not compelling enough to pay up -- a meaningfully different outcome than Firmus Technologies' outright IPO withdrawal the same week, and a data point worth watching as City Therapeutics and Iambic Therapeutics work through their own roadshows this week.

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Key Sources

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