The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This stock page is the Follow view. The Build view lets your agent query QUMSR owners, fund changes, insider filings, and source links through REST or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/QUMSR"
Use Arkolith to show who owns QUMSR, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | HIGHBRIDGE CAPITAL MANAGEMENT LLC | $173K | 690K | ▲+0.9% Added · +6K sh | Q1 2026 | |
| 2 | Shaolin Capital Management LLC | $115K | 460K | —Held | Q1 2026 | |
| 3 | RIVERNORTH CAPITAL MANAGEMENT, LLC | $106K | 425K | —Held | Q1 2026 | |
| 4 | Polar Asset Management Partners Inc. | $100K | 400K | ▲New +400K sh | Q1 2026 | |
| 5 | AQR Arbitrage LLC | $80K | 321K | ▼−0.5% Reduced · −2K sh | Q1 2026 | |
| 6 | Clear Street Group Inc. | $56K | 224K | ▼−2.1% Reduced · −5K sh | Q1 2026 | |
| 7 | Hudson Bay Capital Management LP | $38K | 150K | —Held | Q1 2026 | |
| 8 | BOOTHBAY FUND MANAGEMENT, LLC | $25K | 100K | —Held | Q1 2026 | |
| 9 | Schonfeld Strategic Advisors LLC | $12K | 55K | ▼−0.2% Reduced · −99 sh | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
No Form 4 insider transactions on file yet.
| Class | 13F holders | Value held |
|---|---|---|
| QUMSORD SHS | 20 funds | $53.7M |
| QUMSRthis pageSPACS | 19 funds | $1.4M |
| QUMSUUNIT 07/30/2030 | 5 funds | $1.9M |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
| Company | Co-held by | Combined value |
|---|---|---|
| ART TECHNOLOGY ACQUISIT-CL AARTC | 9 funds | $60.6M |
| M3-BRIGADE ACQUISITION-CL AMBVI | 9 funds | $54.2M |
| CRANE HARBOR ACQUISITIO-CL ACRAN | 9 funds | $53.5M |
| HCM IV ACQUISITION CORPHACQU | 9 funds | $52.6M |
| SIDDHI ACQUISITION CORP-ASDHI | 9 funds | $50.4M |
| K&F GROWTH ACQUISITION COR-AKFII | 9 funds | $43.6M |
| ENHANCED GROUP INCENHA | 9 funds | $41.6M |
| D. BORAL ARC ACQUISIT - CL ABCAR | 9 funds | $39.5M |
| MOZAYYX ACQUISITION CORPMZYX/U | 9 funds | $38.6M |
| EQV VENTURES ACQUISITION C-AEVAC | 9 funds | $36.6M |
| CROWN RESERVE ACQUISITI-CL ACRAC | 9 funds | $36.3M |
| COPLEY ACQUISITION CORP-ACOPL | 9 funds | $36.0M |
Ranked by how many of QUMSR's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
No filings captured for this ticker in the live stream yet.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for QUMSR. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes. Every panel above is one call to the Arkolith API & MCP server.