Comparable stake leader
683 Capital Management, LLC
SEC ownership of Rainier Acquisition Corp
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0002147219.
Disclosed value leader
Jonas Grossman
Comparable rows
2/6
Latest evidence
02 Sep 2026
- Parsed ownership sources
-
3/4/5 and 13D/G
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
683 Capital Management, LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
2 of 6
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
683 Capital Management, LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
02 Sep 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0002147219
- Issuer location
- New York, NY
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Rainier Acquisition Corp (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
683 Capital Management, LLC
Disclosed value leader
Jonas Grossman
Comparable rows
2/6
Latest evidence
02 Sep 2026
3/4/5
13D/G
Lead comparable stake: 11%
4 rows are not safely comparable across share classes.
13D/G row: 683 Capital Management, LLC
Quick read
683 Capital Management, LLC leads the comparable SEC ownership view at 11%.
2 of 6 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens 683 Capital Management, LLC's linked filing trail.
Comparable ownership
Top 2
683 Capital Management, LLC
11%
MMCAP International Inc. SPC
5.2%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 6 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| 683 Capital Management, LLC |
3/4/5
13D/G
10%+ Owner
|
11%
from 13D/G
|
—
862,500 shares
|
— | 27 Aug 2026 |
| MMCAP International Inc. SPC |
13D/G
|
5.2%
|
—
400,000 shares
|
$0 | 28 Aug 2026 |
| Jonas Grossman |
3/4/5
Director, 10%+ Owner
|
—
mixed-class rows
|
$2,500,000
250,000 shares
mixed-class rows
|
+$2,500,000 | 02 Sep 2026 |
| Ravenna 7 LLC |
3/4/5
10%+ Owner
|
—
mixed-class rows
|
$2,500,000
250,000 shares
mixed-class rows
|
+$2,500,000 | 02 Sep 2026 |
| 683 Capital Partners, LP |
3/4/5
10%+ Owner
|
—
class O/S missing
|
—
862,500 shares
|
— | 27 Aug 2026 |
| Ari Zweiman |
3/4/5
10%+ Owner
|
—
class O/S missing
|
—
862,500 shares
|
— | 27 Aug 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to buying over the last 12 months. Net value: +$5,000,000.
Buys
$5,000,000
Insiders: 2
Sells
$0
Insiders: 0
Net
+$5,000,000
Shares: +500,000
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 500,000
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 500,000 | 0 | $5,000,000 | $0 | +$5,000,000 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-10 of 10 reporting-owner rows connected to Rainier Acquisition Corp. Open a relationship link for the CIK-to-CIK filing trail.
Rows
10
Largest Forms 3/4/5 holder
Jonas Grossman
Net 12M change
+$5,000,000
Latest report
02 Sep 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Jonas Grossman | Director, 10%+ Owner | $2,500,000 | +$2,500,000 | +100% | Filing P/S | 02 Sep 2026 |
| Ravenna 7 LLC | 10%+ Owner | $2,500,000 | +$2,500,000 | +100% | Filing P/S | 02 Sep 2026 |
| Guy Barudin | Chief Financial Officer | Mixed | 26 Aug 2026 | |||
| Gbolahan Amusa | Chief Executive Officer, Director | Mixed | 26 Aug 2026 | |||
| Wing C. Lam | Director | Mixed | 26 Aug 2026 | |||
| 683 Capital Management, LLC | 10%+ Owner | Mixed | 27 Aug 2026 | |||
| 683 Capital Partners, LP | 10%+ Owner | Mixed | 27 Aug 2026 | |||
| Ugwumba Chidozie | Director | Mixed | 26 Aug 2026 | |||
| Ari Zweiman | 10%+ Owner | Mixed | 27 Aug 2026 | |||
| Isaac Manke | Director | Mixed | 26 Aug 2026 |
Recent insider transactions for Rainier Acquisition Corp
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Grossman Jonas | Class A ordinary shares | Purchase | 2.89% | $56,250 | $10.00 | 5,625 | 200,000 | 02 Sep 2026 | By Ravenna 7 LLC | |
| Jonas Grossman | Class A ordinary shares | Purchase | 2.89% | $56,250 | $10.00 | 5,625 | 200,000 | 02 Sep 2026 | By Ravenna 7 LLC | |
| Grossman Jonas | Warrants to purchase Class A ordinary shares | Purchase | 2.9% | $14,070 | $10.00 | 1,407 | 50,000 | 02 Sep 2026 | By Ravenna 7 LLC | |
| Jonas Grossman | Warrants to purchase Class A ordinary shares | Purchase | 2.9% | $14,070 | $10.00 | 1,407 | 50,000 | 02 Sep 2026 | By Ravenna 7 LLC | |
| Grossman Jonas | Class A ordinary shares | Purchase | $1,943,750 | $10.00 | 194,375 | 194,375 | 28 Aug 2026 | By Ravenna 7 LLC | ||
| Jonas Grossman | Class A ordinary shares | Purchase | $1,943,750 | $10.00 | 194,375 | 194,375 | 28 Aug 2026 | By Ravenna 7 LLC | ||
| Grossman Jonas | Warrants to purchase Class A ordinary shares | Purchase | $485,930 | $10.00 | 48,593 | 48,593 | 28 Aug 2026 | By Ravenna 7 LLC | ||
| Jonas Grossman | Warrants to purchase Class A ordinary shares | Purchase | $485,930 | $10.00 | 48,593 | 48,593 | 28 Aug 2026 | By Ravenna 7 LLC |
* marks a reported price that did not pass the local price check.