Jonas Grossman - 28 Aug 2026 Form 4 Insider Report for Rainier Acquisition Corp

Reporting relationship: Director, 10%+ Owner
Issuer ticker: N/A
Reported as of: 28 Aug 2026
Net transaction value: +$2,429,680
SEC form: 4
Accepted by SEC: 28 Aug 2026, 17:35:38 UTC
Prior SEC filing: 26 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Guy Barudin, Attorney-in-Fact for Jonas Grossman

Key filing fact

Jonas Grossman filed Form 4 for Rainier Acquisition Corp on 28 Aug 2026.

Key facts

This page summarizes Jonas Grossman's Form 4 filing for Rainier Acquisition Corp.
2 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 28 Aug 2026, 17:35.

Change

Previous filing in this sequence was filed on 26 Aug 2026.
Current net transaction value: +$2,429,680.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (2)

CIK 0001423905 Primary reporting owner

GROSSMAN JONAS

Relationship: Director, 10%+ Owner
Address: 1 PENN PLAZA, 48TH FLOOR, NEW YORK
Signature: /s/ Guy Barudin, Attorney-in-Fact for Jonas Grossman
Signature date: 28 Aug 2026

CIK 0002152033

Ravenna 7 LLC

Relationship: 10%+ Owner
Address: 1 PENN PLAZA, 48TH FLOOR, NEW YORK
Signature: RAVENNA 7 LLC, By: /s/ Guy Barudin, Attorney-in-Fact for Jonas Grossman, Managing Member
Signature date: 28 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

No ticker transaction

Class A ordinary shares

Purchase

Transaction value: $1,943,750
Shares: +194,375
Change %
Price: $10.00
Shares after: 194,375
Date: 28 Aug 2026
Ownership: By Ravenna 7 LLC
Footnotes: F1, F2

No ticker transaction

Class A ordinary shares

Purchase

Transaction value: $1,943,750
Shares: +194,375
Change %
Price: $10.00
Shares after: 194,375
Date: 28 Aug 2026
Ownership: By Ravenna 7 LLC
Footnotes: F1, F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

No ticker transaction Derivative

Warrants to purchase Class A ordinary shares

Purchase

Transaction value: $485,930
Shares: +48,593
Change %
Price: $10.00
Shares after: 48,593
Date: 28 Aug 2026
Ownership: By Ravenna 7 LLC
Underlying class: Class A ordinary shares
Underlying amount: 48,593
Exercise price: $11.50
Footnotes: F1, F2, F3

No ticker transaction Derivative

Warrants to purchase Class A ordinary shares

Purchase

Transaction value: $485,930
Shares: +48,593
Change %
Price: $10.00
Shares after: 48,593
Date: 28 Aug 2026
Ownership: By Ravenna 7 LLC
Underlying class: Class A ordinary shares
Underlying amount: 48,593
Exercise price: $11.50
Footnotes: F1, F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Represents securities underlying 194,375 units (the "Units") purchased by Ravenna 7 LLC from the Issuer in a private placement at a purchase price of $10.00 per Unit. Each Unit consists of one Class A ordinary share, $0.0001 par value per share (the "Class A Ordinary Share"), and one-quarter of one warrant (the "Warrants"), each whole Warrant entitling the holder thereof to purchase one Class A Ordinary Share at an exercise price of $11.50 per share, subject to adjustment.

Footnote F2

Shares held directly by Ravenna 7 LLC, of which Jonas Grossman is the sole managing member. Mr. Grossman disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein, if any.

Footnote F3

The Warrants will become exercisable on the later of (i) August 28, 2026 and (ii) the completion of the Issuer's initial business combination. The Warrants will expire on the fifth anniversary of the completion of the Issuer's initial business combination or earlier upon redemption or liquidation.