13F reference period
Q3 2026
Security Snapshot
Atlantic Acquisition Corp I - Common (ATLQ) Institutional Ownership
CUSIP: G50004103
13F Institutional Holders and Ownership History for Q3 2026
Institutions Reporting
9
Shares (Excl. Options)
6.04M
Full value: 6,036,356 · shares · 30 Sep 2026Price
$9.96
The headline uses the Q3 2026 reference period after its reporting deadline. Available reports may still be incomplete or amended.
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- Security type / class
- Equity / Common
- Symbol
- ATLQ on Nasdaq
- All holders as of 30 Sep 2026
- Q3 2026
- Total 13F shares
- 6,036,356
- Total 13F value
- $60,061,834
- Portfolio coverage rank
- 0%
- Share change
- +5,689,706
- Value change
- +$56,609,200
- Number of holders
- 9
- Shares outstanding
- 28,443,482
- SEC-reported price per share
- $10.00
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
2 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Filing notes and source
Key facts
- ATLQ - Atlantic Acquisition Corp I - Common is tracked under CUSIP G50004103.
- 9 institutions reported positions in Q3 2026.
- 7 significant owners is listed from Schedule 13D/13G reporting.
Change
- The headline uses Q3 2026 reported holdings.
- Quarter-over-quarter comparison is unavailable because the immediately preceding quarter is missing.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 9 institutions filings for Q3 2026.
Security key
G50004103
13F reference period
Q3 2026
13F holders
9
13D/G owners
7
CIK / CUSIP context first
Open Q3 2026 holders
ATLQ full holder history
JAB Acquisition Corp I SEC filings
JAB Acquisition Corp I company facts
JAB Acquisition Corp I insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP G50004103:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
7
Security
ATLQ
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| JAB Acquisition Sponsor I, LLC | 36% | 10,442,143 | JAB Acquisition Sponsor I, LLC | 09 Jun 2026 | ||||
| Karpus Management, Inc. | 6.1% | $17,236,750 | 1,723,675 | KARPUS MANAGEMENT, INC. | 30 Sep 2026 | |||
| BERKLEY W R CORP | 6.6% | $12,363,190 | 1,236,319 | W. R. Berkley Corporation | 30 Sep 2026 | |||
| Westchester Capital Management, LLC | 6.4% | $11,940,800 | 1,194,080 | Westchester Capital Management, LLC | 30 Sep 2026 | |||
| Magnetar Financial LLC | 4.8% | -7.6% | $9,000,000 | 900,000 | 0% | MAGNETAR FINANCIAL LLC | 30 Sep 2026 | |
| MIZUHO FINANCIAL GROUP INC | 4.4% | $8,141,560 | 814,156 | Mizuho Financial Group, Inc. | 30 Sep 2026 | |||
| Feis Equities LLC | 3% | 553,126 | Feis Equities LLC | 07 Aug 2026 |
As of 30 Sep 2026,
9
institutional investors reported holding
shares of
Atlantic Acquisition Corp I - Common (ATLQ).
This represents
21%
of the company’s total
outstanding shares.
6.04M
Full value: 6,036,356 · shares · 30 Sep 202628.44M
Full value: 28,443,482 · shares · Stored outstanding share count13F concentration
Top 9 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
21%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Karpus Management, Inc. | 6.1% | 1,723,675 | 0.51% | $17,167,803 | |
| Westchester Capital Management, LLC | 3.7% | 1,050,000 | 0.49% | $10,458,000 | |
| Magnetar Financial LLC | 3.2% | 900,000 | 0.09% | $8,964,000 | |
| MIZUHO SECURITIES USA LLC | 2.9% | 814,156 | 0.14% | $8,048,722 | |
| Crossingbridge Advisors, LLC | 2.5% | 725,000 | 1.3% | $7,221,000 | |
| First Trust Capital Management L.P. | 1.4% | 400,000 | 0.19% | $3,984,000 | |
| BNP PARIBAS FINANCIAL MARKETS | 1.2% | 346,650 | 0% | $3,452,634 | |
| Warberg Asset Management LLC | 0.16% | 46,875 | 0.11% | $466,875 | |
| ABC ARBITRAGE SA | 0.11% | 30,000 | 0.03% | $298,800 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
1
Headline period
Q3 2026
Rows shown
1-1 of 1
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q3 | 6,036,356 | $60,061,834 | +$56,609,200 | $9.96 | 9 |