# QUANTUM CORP COM

QUANTUM CORP COM is a security (CUSIP 747906600) tracked across SEC portfolio filings. 38 institutional managers reported $9.6M on Form 13F as of 2026-06-30; 4 registered fund positions totaling $773K via N-PORT as of 2026-03-31.

## Summary

- Issuer: QUANTUM CORP
- Class: COM
- CUSIP: 747906600
- Asset category: EC
- 13F holders: 38
- 13F value: $9.6M
- 13F period: 2026-06-30
- N-PORT fund positions: 4
- N-PORT value: $773K
- N-PORT report: 2026-03-31

## Top institutional holders (Form 13F)

_Showing 15 of 38 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $4.0M | 625,538 |
| [Walleye Capital LLC](https://search.stillhousedata.com/firm/161413) | NEW YORK, NY | $1.3M | 120,044 |
| BlackRock, Inc. | New York, NY | $1.0M | 217,532 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $756K | 159,179 |
| UBS Group AG | Zurich, V8 | $471K | 99,068 |
| STATE STREET CORP | BOSTON, MA | $346K | 72,814 |
| [SONA ASSET MANAGEMENT (US) LLC](https://search.stillhousedata.com/firm/291738) | NEW YORK, NY | $333K | 70,092 |
| [MARSHALL WACE, LLP](https://search.stillhousedata.com/firm/160885) | LONDON, X0 | $178K | 37,528 |
| CITIGROUP INC | NEW YORK, NY | $159K | 14,426 |
| [Kovack Advisors, Inc.](https://search.stillhousedata.com/firm/140808) | FT. LAUDERDALE, FL | $147K | 13,430 |
| NORTHERN TRUST CORP | CHICAGO, IL | $137K | 28,762 |
| [FLAGSHIP HARBOR ADVISORS, LLC](https://search.stillhousedata.com/firm/155733) | BOSTON, MA | $121K | 11,004 |
| [LPL Financial LLC](https://search.stillhousedata.com/firm/6413) | FORT MILL, SC | $117K | 24,598 |
| BANK OF AMERICA CORP /DE/ | CHARLOTTE, NC | $97K | 20,485 |
| [BRIDGEWAY CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/111441) | HOUSTON, TX | $77K | 16,240 |

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $728K | 0.09% |
| [VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002855) | VANGUARD INSTITUTIONAL INDEX FUNDS | $32K | 0.01% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $24K | 0.00% |
| [Blackstone Alternative Multi-Strategy Fund](https://search.stillhousedata.com/fund/S000045538) | Blackstone Alternative Investment Funds | $-11K | -0.03% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/747906600.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.