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Rainier Acquisition Corp

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Rainier Acquisition Corp

RNAQU·NASDAQ·Life Sciences·CIK 0002147219

Rainier Acquisition Corp is a company established to complete a business combination, such as a merger, amalgamation, share exchange, asset acquisition, share purchase, or reorganization, with one or more existing businesses. The company was incorporated in 2023 and is headquartered in New York, New York. It was previously known as Chardan Healthcare Acquisition 4 Company and adopted the name Rainier Acquisition Corporation in March 2026.

Rainier Acquisition Corp (NASDAQ:RNAQU) is a publicly traded company in the Life Sciences sector.

Short Interest & Short Volume

1.00 days to cover

FINRA reported short interest of 38,698 shares in RNAQU as of the September 15, 2026 settlement, a 352.5% increase from the prior period — about 1.0 days to cover at its recent average daily volume. On September 28, 2026, 11.1% of RNAQU volume reported to FINRA trade-reporting facilities was marked short.

Short interest (bi-monthly positions)38,698 shares as of September 15, 2026
Change vs prior period▲ 352.5%
Days to cover1.00 at avg daily volume of 51,977
Daily short volume (FINRA facilities)11.1% of 11,702 shares on September 28, 2026

Daily short sale volume covers trades reported to FINRA trade-reporting facilities and is not the same as short interest (bi-monthly reported positions). Source: FINRA — FINRA is the owner and source of this short interest and short sale volume data; it may not be redistributed.

$10.06 -0.13% today
Market cap
$115.02M
Live data · 2026-10-05 02:47 UTC · Market closed

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