# Who owns Qdro Acquisition Corp (QADRU)

> SEC 13F institutional ownership plus Form 4 insider activity. Teaser: top 10 of 33 tracked institutional holders.
> Tracked 13F value $156.8M.

## Top institutional holders (teaser)

| # | Fund | Value | Change | Quarter |
|---|------|-------|--------|---------|
| 1 | ADAGE CAPITAL PARTNERS GP, L.L.C. | $14.9M | New | Q1 2026 |
| 2 | Polar Asset Management Partners Inc. | $14.9M | New | Q1 2026 |
| 3 | ARISTEIA CAPITAL, L.L.C. | $12.4M | New | Q1 2026 |
| 4 | HGC Investment Management Inc. | $11.9M | New | Q1 2026 |
| 5 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | $9.9M | New | Q1 2026 |
| 6 | Magnetar Financial LLC | $7.4M | New | Q1 2026 |
| 7 | AQR Arbitrage LLC | $7.1M | New | Q1 2026 |
| 8 | LMR Partners LLP | $6.9M | New | Q1 2026 |
| 9 | HIGHBRIDGE CAPITAL MANAGEMENT LLC | $6.6M | New | Q1 2026 |
| 10 | MILLENNIUM MANAGEMENT LLC | $6.2M | New | Q1 2026 |

## Insider activity

No open-market Form 4 insider signal in the tracked window.

Owner counts and value reflect the 13F filers Arkolith currently tracks, not total institutional ownership. A fund that just sold out keeps a zero-share exit row and is not counted as a current holder.

## Full data via the API and MCP

This page is a teaser. The complete book, full quarter-over-quarter history, and per-datapoint
provenance are available through the metered REST API and MCP server.

- Endpoint: https://arkolith.com/api/mcp (transport: streamable-http)
- Auth: Bearer API key. Mint one and copy a ready-to-paste command at https://arkolith.com/connect
- Claude Code: `claude mcp add --transport http arkolith https://arkolith.com/api/mcp --header "Authorization: Bearer YOUR_API_KEY"`
- Discovery: `tools/list` is free; `tools/call` is metered by credits.

### Machine-readable
- Tool catalog JSON: https://arkolith.com/api/mcp/catalog
- MCP descriptor: https://arkolith.com/.well-known/mcp.json
- OpenAPI 3.1 REST spec: https://arkolith.com/openapi.json
- Full LLM guide: https://arkolith.com/llms-full.txt
- Human docs: https://arkolith.com/docs

## Source and method

- Source: SEC EDGAR 13F (institutional holdings) and Form 4 (insider trades), public domain. 13F is quarterly with about a 45-day lag.
- Human page: https://arkolith.com/stock/QADRU
- Per-datapoint lineage: call the `provenance.get` MCP tool for the source URL and fetch history behind any figure.

Paid product with a one-time evaluation grant at signup (no card to evaluate). Most calls cost 1 credit (~$0.01); heavier point-in-time / cross-source tools cost more.

_Latest disclosed public filings. Data, not investment advice._