Horizon Space Acquisition II Corp.
Horizon Space Acquisition II Corp. (HSPT) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · HSPT · as of Sep 30, 2025
Ownership Breakdown
20
Institutional Holders
▲ 1 vs Q2
$66.22M
Total Inst. Value
▲ $5.29M vs Q2
7.92M
Shares Outstanding
freeFloat 81.00%
6.40M
13F Shares Held
▲ 436,351 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
HSPT largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BERKLEY W R CORP blank checks | 722.3K | 10.47% | 10.47% | $7.47B | Nov 14, 2025 | ▲ 48.0K |
WOLVERINE ASSET MANAGEMENT LLC blank checks | 656.2K | 9.51% | 9.51% | $6.80B | Oct 28, 2025 | ▼ 26.9K |
MIZUHO SECURITIES USA LLC blank checks | 635.0K | 9.20% | 9.20% | $6.54B | Oct 22, 2025 | ▲ 6.0K |
ATW SPAC MANAGEMENT LLC blank checks | 575.0K | 8.33% | 8.33% | $5.96B | Nov 12, 2025 | — held |
BOOTHBAY FUND MANAGEMENT, LLC blank checks | 575.0K | 8.33% | 8.33% | $5.95B | Nov 14, 2025 | — held |
POLAR ASSET MANAGEMENT PARTNERS INC. blank checks | 525.0K | 7.61% | 7.61% | $5.44B | Dec 1, 2025 | — held |
RIVERNORTH CAPITAL MANAGEMENT, LLC blank checks | 427.4K | 6.19% | 6.19% | $4.42B | Nov 14, 2025 | NEW |
AQR ARBITRAGE LLC blank checks | 414.4K | 6.01% | 6.01% | $4.28B | Nov 14, 2025 | ▼ 7.4K |
WESTCHESTER CAPITAL MANAGEMENT, LLC blank checks | 404.9K | 5.87% | 5.87% | $4.19B | Nov 14, 2025 | — held |
HUDSON BAY CAPITAL MANAGEMENT LP blank checks | 400.0K | 5.80% | 5.80% | $4.14B | Dec 15, 2025 | — held |
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
3
Increased
+54.0K shares2
New Positions
first time holders5
Decreased
−79.8K shares0
Sold Out
fully exitedNet shares change (top 50)
25.9K
+54.0K / −79.8K
Net new holders
+0
2 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
HSPT insider trading · insider activity
Source: SEC Form 4
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
Horizon Space Acquisition II Corp. (HSPT) is primarily owned by institutional investors, who hold approximately 80.8% of total shares outstanding. Company insiders own approximately 19.00%, while retail and public investors account for the remaining 0.15%.
The largest institutional shareholder of Horizon Space Acquisition II Corp. is BERKLEY W R CORP, holding approximately 722,303 shares — equal to 10.47% of outstanding shares — as of September 30, 2025.
A total of 20 institutional investors currently hold HSPT stock, with a combined institutional value of approximately $66,221,544 as of the most recent 13F filing period.
Frequently asked questions
HSPT ownershipHorizon Space Acquisition II Corp. (HSPT) is primarily owned by institutional investors, who hold approximately 80.8% of shares. The largest shareholder is BERKLEY W R CORP with a 10.47% stake. Company insiders hold 19.00%. Data sourced from SEC Form 13F as of September 30, 2025.