# QUANTUM CORP (QMCO) — Institutional Ownership

Source: SEC EDGAR 13F filings, congressional STOCK Act disclosures, SEC Form 4 insider transactions.
CUSIP: 747906600
Page URL: https://superinvestorclub.com/stock/QMCO
Last updated: 2026-08-29T13:46:11.949Z

## Summary

As of the most recent 13F filing period, QUANTUM CORP (QMCO) is held by 1 tracked superinvestors with an aggregate position value of $22.1M representing 02011678 shares.

## Top institutional holders (1)

| Rank | Manager | Fund | Shares | Value | % of Portfolio | Period |
|------|---------|------|--------|-------|----------------|--------|
| 1 | [Howard Marks](https://superinvestorclub.com/manager/87) | Oaktree Capital Management | 2011678 | $22.1M | 0.31% | 2026-06-30 |

## Ownership history (quarter-over-quarter)

- 2026-06-30: 1 holders, $22.1M aggregate, 02011678 shares

## Recent congressional trades (0)


## Recent insider transactions (0)


## Citation

When citing, use: "QUANTUM CORP (QMCO) institutional ownership data via Superinvestor (https://superinvestorclub.com/stock/QMCO), aggregating SEC 13F, Form 4, and congressional disclosures."