Comparable stake leader
Catalyst Sponsor LLC
SEC ownership of Catalyst Acquisition Corp.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0002104391.
Disclosed value leader
MILLENNIUM MANAGEMENT LLC
Comparable rows
3/3
Latest evidence
17 Aug 2026
- Public ticker
- CATL, CATLU on Nasdaq
- Parsed ownership sources
-
3/4/5 and 13D/G
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Catalyst Sponsor LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
3 of 3
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Catalyst Sponsor LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
17 Aug 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0002104391
- Issuer location
- Santa Monica, CA
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 Catalyst 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
Catalyst Sponsor LLC
Disclosed value leader
MILLENNIUM MANAGEMENT LLC
Comparable rows
3/3
Latest evidence
17 Aug 2026
3/4/5
13D/G
Lead comparable stake: 22%
13D/G row: Catalyst Sponsor LLC
Quick read
Catalyst Sponsor LLC leads the comparable SEC ownership view at 22%.
3 of 3 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 Catalyst Sponsor LLC's linked filing trail.
Comparable ownership
Top 3
Catalyst Sponsor LLC
22%
MILLENNIUM MANAGEMENT LLC
7.7%
Linden Capital L.P.
6.4%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-3 of 3 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Catalyst Sponsor LLC |
3/4/5
13D/G
10%+ Owner
|
22%
from 13D/G
|
—
270,000 shares
|
— | 29 Jul 2026 |
| MILLENNIUM MANAGEMENT LLC |
13D/G
|
7.7%
|
$16,407,120
1,644,000 shares
|
+$1,606,780 | 17 Aug 2026 |
| Linden Capital L.P. |
13D/G
Linden Advisors LP
|
6.4%
|
—
1,300,000 shares
|
$0 | 29 Jul 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
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 30 Aug 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 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 1-7 of 7 reporting-owner rows connected to Catalyst Acquisition Corp.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
7
Largest Forms 3/4/5 holder
Nicolas A. van Dyk
Net 12M change
$0
Latest report
29 Jul 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Nicolas A. van Dyk | Co-CEO, Director | Mixed | 27 Jul 2026 | |||
| Steve Beeks | Co-CEO, Director | Mixed | 27 Jul 2026 | |||
| Christopher Heatherly | Director | Mixed | 27 Jul 2026 | |||
| Craig A. Elson | Chief Financial Officer | Mixed | 27 Jul 2026 | |||
| Melvin D. Lindsey | Director | Mixed | 27 Jul 2026 | |||
| Richard W. Cook | Director | Mixed | 27 Jul 2026 | |||
| Catalyst Sponsor LLC | 10%+ Owner | Mixed | 29 Jul 2026 |
Recent insider transactions for Catalyst 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Catalyst Sponsor LLC | CATLU | Class A ordinary shares | Purchase | 270,000 | 270,000 | 29 Jul 2026 | Direct | |||
| Catalyst Sponsor LLC | CATLU | Right to receive one-seventh of one Class A ordinary share | Purchase | 270,000 | 270,000 | 29 Jul 2026 | Direct |
* marks a reported price that did not pass the local price check.