AlphaTime Acquisition Corp
AlphaTime Acquisition Corp (ATMC) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ATMC · as of Sep 30, 2025
Ownership Breakdown
11
Institutional Holders
▼ 2 vs Q2
$11.44M
Total Inst. Value
▼ $3.90M vs Q2
3.47M
Shares Outstanding
freeFloat 38.49%
929,308
13F Shares Held
▼ 376,280 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ATMC largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
KARPUS MANAGEMENT, INC. blank checks | 332.1K | 9.57% | 9.57% | $3.97B | Nov 14, 2025 | ▼ 9.7K |
BERKLEY W R CORP blank checks | 171.0K | 4.93% | 4.93% | $2.05B | Nov 14, 2025 | — held |
METEORA CAPITAL, LLC blank checks | 118.9K | 3.43% | 3.43% | $1.55B | Nov 17, 2025 | ▼ 33.9K |
HUDSON BAY CAPITAL MANAGEMENT LP blank checks | 94.9K | 2.74% | 2.74% | $1.14B | Dec 15, 2025 | — held |
WOLVERINE ASSET MANAGEMENT LLC blank checks | 75.0K | 2.16% | 2.16% | $974.25M | Oct 28, 2025 | ▼ 108.7K |
CLEAR STREET GROUP INC. blank checks | 59.0K | 1.70% | 1.70% | $766.38M | Nov 14, 2025 | NEW |
PNC FINANCIAL SERVICES GROUP, INC. blank checks | 45.0K | 1.30% | 1.30% | $584.55M | Nov 7, 2025 | — held |
QUARRY LP blank checks | 25.3K | 72.96% | 72.96% | $302.73M | Nov 14, 2025 | ▼ 25.3K |
UBS GROUP AG blank checks | 7.9K | 22.69% | 22.69% | $102.24M | Nov 13, 2025 | ▲ 385 |
PENDERFUND CAPITAL MANAGEMENT LTD. blank checks | 181 | 0.52% | 0.52% | $2.17M | Nov 14, 2025 | NEW |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
2
Increased
+390 shares2
New Positions
first time holders4
Decreased
−177.6K shares3
Sold Out
fully exitedNet shares change (top 50)
177.3K
+390 / −177.6K
Net new holders
-3
2 new / 3 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ATMC insider trading · insider activity
Source: SEC Form 4
0
Buy transactions
1
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
No recent insider transactions reported.
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
AlphaTime Acquisition Corp (ATMC) is primarily owned by institutional investors, who hold approximately 26.8% of total shares outstanding. Company insiders own approximately 61.51%, while retail and public investors account for the remaining 11.70%.
The largest institutional shareholder of AlphaTime Acquisition Corp is KARPUS MANAGEMENT, INC., holding approximately 332,084 shares — equal to 9.57% of outstanding shares — as of September 30, 2025.
A total of 11 institutional investors currently hold ATMC stock, with a combined institutional value of approximately $11,441,122 as of the most recent 13F filing period.
Frequently asked questions
ATMC ownershipAlphaTime Acquisition Corp (ATMC) is primarily owned by institutional investors, who hold approximately 26.8% of shares. The largest shareholder is KARPUS MANAGEMENT, INC. with a 9.57% stake. Company insiders hold 61.51%. Data sourced from SEC Form 13F as of September 30, 2025.