Who owns StoneBridge Acquisition II Corp?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of APAC from SEC Form 13F filings across 28 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 28 institutions disclosed 5.3M shares of StoneBridge Acquisition II Corp worth $53.7M — about 65.8% of shares outstanding; the largest disclosed holder is MIZUHO SECURITIES USA LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
28
13F holders
$53.7M
value, 2026 filers
65.8%
of shares outstanding (5.3M sh)
1
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of APAC's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | MIZUHO SECURITIES USA LLC | 552,055 | $5.5M | 0.1% | 6.9% | 0.0% |
| 2 | RIVERNORTH CAPITAL MANAGEMENT, LLC | 494,133 | $5.0M | 0.2% | 6.1% | -0.1% |
| 3 | Karpus Management, Inc. | 465,125 | $4.7M | 0.1% | 5.8% | +7.3% |
| 4 | WOLVERINE ASSET MANAGEMENT LLC | 397,863 | $4.0M | 0.0% | 4.9% | -0.8% |
| 5 | GLAZER CAPITAL, LLC | 360,100 | $3.7M | 0.1% | 4.5% | -6.5% |
| 6 | Clear Street Group Inc. | 318,923 | $3.2M | 0.0% | 4% | +3.5% |
| 7 | AQR Arbitrage LLC | 286,849 | $2.9M | 0.0% | 3.6% | 0.0% |
| 8 | Logan Stone Capital, LLC | 252,000 | $2.6M | 0.5% | 3.1% | 0.0% |
| 9 | MANGROVE PARTNERS IM, LLC | 225,000 | $2.3M | 0.2% | 2.8% | 0.0% |
| 10 | Verition Fund Management LLC | 200,000 | $2.0M | 0.0% | 2.5% | 0.0% |
| 11 | ARISTEIA CAPITAL, L.L.C. | 200,000 | $2.0M | 0.0% | 2.5% | 0.0% |
| 12 | Shaolin Capital Management LLC | 176,860 | $1.8M | 0.1% | 2.2% | -11.6% |
| 13 | Radcliffe Capital Management, L.P. | 160,000 | $1.6M | 0.1% | 2% | 0.0% |
| 14 | Polar Asset Management Partners Inc. | 150,000 | $1.5M | 0.0% | 1.9% | 0.0% |
| 15 | Cable Car Capital, LP | 150,000 | $1.5M | 0.0% | 1.9% | 0.0% |
| 16 | BOOTHBAY FUND MANAGEMENT, LLC | 137,500 | $1.4M | 0.0% | 1.7% | 0.0% |
| 17 | SONA ASSET MANAGEMENT (US) LLC | 117,096 | $1.2M | 0.0% | 1.5% | 0.0% |
| 18 | BERKLEY W R CORP | 113,358 | $1.2M | 0.1% | 1.4% | 0.0% |
| 19 | TWO SIGMA INVESTMENTS, LP | 90,625 | $921,656 | 0.0% | 1.1% | 0.0% |
| 20 | BNP PARIBAS FINANCIAL MARKETS | 90,150 | $916,826 | 0.0% | 1.1% | 0.0% |
| 21 | Westchester Capital Management, LLC | 80,000 | $813,600 | 0.0% | 1% | 0.0% |
| 22 | Crossingbridge Advisors, LLC | 75,000 | $762,750 | 0.1% | 0.9% | 0.0% |
| 23 | RLH Capital LLC | 57,500 | $584,775 | 0.3% | 0.7% | 0.0% |
| 24 | HEIGHTS CAPITAL MANAGEMENT, INC | 50,500 | $513,585 | 0.1% | 0.6% | 0.0% |
| 25 | SkyView Investment Advisors, LLCNEW | 49,570 | $504,000 | 0.4% | 0.6% | new |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.