Key facts
- Magnetar Financial LLC filed SCHEDULE 13G for MOUNTAIN LAKE ACQUISITION CORP. II Class A ordinary shares, par value $0.0001 (MLAA).
- Disclosed ownership: 5.4%.
- Date of event: 31 Mar 2026.
Magnetar Financial LLC - 31 Mar 2026 SCHEDULE 13G Report for MOUNTAIN LAKE ACQUISITION CORP. II Class A ordinary shares, par value $0.0001 (MLAA)
- Filing Manager
- Magnetar Financial LLC
- Reporting Manager
- MAGNETAR FINANCIAL LLC
- Symbol
- MLAA
- Shares outstanding
- 37,037,037 shares
- Disclosed Ownership
- 2,000,000 shares
- Ownership
- 5.4%
- Form type
- SCHEDULE 13G
- Filing time
- 13 May 2026, 09:50:16 UTC
- Date of event
- 31 Mar 2026
- SEC
- View on sec.gov
Key filing fact
Magnetar Financial LLC disclosed 5.4% ownership in MOUNTAIN LAKE ACQUISITION CORP. II Class A ordinary shares, par value $0.0001 (MLAA) on 31 Mar 2026.
Change
- No earlier schedule filing is available for direct comparison.
- Current filing was accepted on 13 May 2026, 09:50.
Research use
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting persons
Reporting managers (4)
Names, ownership, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| MAGNETAR FINANCIAL LLC | 5.4% | 2,000,000 | 0 | 2,000,000 | /s/ Hayley Stein | Name: Hayley Stein, Title: Attorney-in-fact for David J. Snyderman, Administrative Manager of Supernova Management LLC | |
| MAGNETAR CAPITAL PARTNERS LP | 5.4% | 2,000,000 | 0 | 2,000,000 | /s/ Hayley Stein | Name: Hayley Stein, Title: Attorney-in-fact for David J. Snyderman, Administrative Manager of Supernova Management LLC | |
| SUPERNOVA MANAGEMENT LLC | 5.4% | 2,000,000 | 0 | 2,000,000 | /s/ Hayley Stein | Name: Hayley Stein, Title: Attorney-in-fact for David J. Snyderman, Administrative Manager of Supernova Management LLC | |
| DAVID J. SNYDERMAN | 5.4% | 2,000,000 | 0 | 2,000,000 | /s/ Hayley Stein | Name: Hayley Stein, Title: Attorney-in-fact for David J. Snyderman, Administrative Manager of Supernova Management LLC |
CIK / CUSIP context first