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Company · RNAQ

Rainier Acquisition Corporation

Name as listed on its exchange; filed with the SEC as Rainier Acquisition Corp.

Nasdaq's symbol directory lists RNAQ on Nasdaq as “Rainier Acquisition Corporation - Class A Ordinary Shares”.

In the 12 months to Nov 8, 2026: insiders bought on 2 occasions ($2.0M); 3 filings by holders of 5% or more; 1 company report (Form 8-K, since May 26, 2026).

All insider filings at the SEC

Insider purchases and sales, by month (last 12 months)Insider purchases: $2.0M in total; Insider sales: $0 in total.Aug: Insider purchases $1.9MSep: Insider purchases $56KDecJanFebMarAprMayJunJulAugSepOctNov
Insider purchases above the line: $2.0MInsider sales below: $0
Dollar value of open-market purchases and sales reported on SEC Form 4, by the month traded. Sales include pre-arranged 10b5-1 plan sales.

Insider trades · SEC Form 4

Those inside the hall

Open-market purchases and sales only. Legs one person filed for one day are combined.

Who traded

  1. Jonas Grossman bought on 2 days latest Sep 2, 2026 bought $2.0M
Every trade (2)
  1. BUYJonas Grossman bought Sep 2, 2026 5,625 shares filing $56K
  2. BUYJonas Grossman bought Aug 28, 2026 194,375 shares filing $1.9M

Large holders · SEC Schedules 13D and 13G

Five percent and over

Anyone who comes to hold more than 5% of a company's voting shares must tell the SEC. A Schedule 13D is filed by a holder who may seek to influence the company; a 13G by one who states it is a passive investor. An amendment updates an earlier filing, and a stake reported as 0% means the holder says it has sold all, or nearly all, of its shares. Every recent 13D and 13G

  1. Sio Capital Management, LLC filed Nov 3, 2026 Schedule 13G passive 500,000 shares filing 5.67%
  2. 683 Capital Management, LLC filed Sep 3, 2026 Schedule 13G passive filing 11.2%
  3. MMCAP International Inc. SPC filed Sep 1, 2026 Schedule 13G passive 400,000 shares filing 5.2%

Company reports · SEC Form 8-K

In its own words

Current reports the company filed with the SEC; most items are due within four business days of the event. Each line lists the report's items by the SEC's own titles; the filing says what happened. Reports collected since May 26, 2026; every 8-K at the SEC.

  1. Other events filing Sep 11, 2026

Sources: SEC EDGAR (Forms 4, 144 and 8-K) and STOCK Act periodic transaction reports. Filings can be late, amended or wrong at the source; see methodology.