Comparable stake leader
Harry L. You
SEC ownership of Berto Acquisition Corp. II
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0002081515.
Disclosed value leader
MILLENNIUM MANAGEMENT LLC
Comparable rows
0/32
Latest evidence
30 Jun 2026
- Public ticker
- GUAC, GUACU, GUACW on Nasdaq
- Parsed ownership sources
-
3/4/5 and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Harry L. You
Ranking: Comparable ownership first, then disclosed value
- Latest parsed ownership date
-
30 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0002081515
- Issuer location
- Las Vegas, NV
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
1 signal
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Berto Acquisition Corp. II (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
Harry L. You
Disclosed value leader
MILLENNIUM MANAGEMENT LLC
Comparable rows
0/32
Latest evidence
30 Jun 2026
3/4/5
13F
Highest disclosed value: $24,199,703
32 rows are not safely comparable across share classes.
Showing 1-8 of 32 holder rows.
Quick read
MILLENNIUM MANAGEMENT LLC has the largest disclosed position value at $24.2M.
0 of 32 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 MILLENNIUM MANAGEMENT LLC's linked filing trail.
Disclosed position value
Top 5
MILLENNIUM MANAGEMENT LLC
$24.2M
LINDEN ADVISORS LP
$17.19M
Magnetar Financial LLC
$16.18M
ARISTEIA CAPITAL, L.L.C.
$13.16M
Radcliffe Capital Management, L.P.
$13.16M
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-8 of 32 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Harry L. You |
3/4/5
10%+ Owner
|
—
class O/S missing
|
—
5,311,910 shares
|
— | 15 May 2026 |
| MILLENNIUM MANAGEMENT LLC |
13F
Company
|
—
class O/S missing
|
$24,199,703
2,391,275 shares
|
— | 30 Jun 2026 |
| LINDEN ADVISORS LP |
13F
Company
|
—
class O/S missing
|
$17,187,000
1,700,000 shares
|
— | 30 Jun 2026 |
| Magnetar Financial LLC |
13F
Company
|
—
class O/S missing
|
$16,176,000
1,600,000 shares
|
— | 30 Jun 2026 |
| ARISTEIA CAPITAL, L.L.C. |
13F
Company
|
—
class O/S missing
|
$13,156,000
1,300,000 shares
|
— | 30 Jun 2026 |
| Radcliffe Capital Management, L.P. |
13F
Company
|
—
class O/S missing
|
$13,156,000
1,300,000 shares
|
— | 30 Jun 2026 |
| Centiva Capital, LP |
13F
Company
|
—
class O/S missing
|
$12,132,000
1,200,000 shares
|
— | 30 Jun 2026 |
| Wealthspring Capital LLC |
13F
Company
|
—
class O/S missing
|
$11,015,620
1,088,500 shares
|
— | 30 Jun 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 16 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 1-6 of 6 reporting-owner rows connected to Berto Acquisition Corp. II. Open a relationship link for the CIK-to-CIK filing trail.
Rows
6
Largest Forms 3/4/5 holder
Harry L. You
Net 12M change
$0
Latest report
15 May 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Harry L. You | 10%+ Owner | Mixed | 15 May 2026 | |||
| Constance K. Weaver | Director | Mixed | 14 May 2026 | |||
| Vikas Mittal | Director | Mixed | 14 May 2026 | |||
| Darla Anderson | Director | Mixed | 14 May 2026 | |||
| Robert You | President and CFO | Mixed | 15 May 2026 | |||
| Samuel O Lynn | Director | Mixed | 14 May 2026 |
Recent insider transactions for Berto Acquisition Corp. II
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Robert You | GUAC | Ordinary Shares | Other | 10.1% | 203,090 | 2,215,590 | 15 May 2026 | Direct | ||
| Harry L. You | GUAC | Ordinary Shares | Other | 10.1% | 254,808 | 2,779,808 | 15 May 2026 | See footnote. | ||
| Harry L. You | GUAC | Ordinary Shares | Other | 10.1% | 232,102 | 2,532,102 | 15 May 2026 | Direct |
* marks a reported price that did not pass the local price check.