Stocks › QMCO
QUANTUM CORP /DE/
QMCO·Nasdaq·
United States·USD
United States·USD$33.47
-0.54 (-1.57%)
Close · Oct 6, 2026 · Close Prices from Tiingo.com
QMCO
QUANTUM CORP /DE/ · Nasdaq
Nasdaq 100S&P 500
Filings
Default90D1Y5YALL
QMCOS&P 500 (rebased)
Congress BuyCongress SellInsider BuyInsider SellForm 1448-K ResultsLobbying
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Daily closes, adjusted for splits and dividends · Close Prices from Tiingo.comHover a marker, every one is a filing · move across the line for the crosshair
Congressional Trades
Recent trades of QMCO by members of U.S. Congress · 3 on record
| Politician | Stock | Type | Filed | Traded | |
|---|---|---|---|---|---|
 Debbie Wasserman SchultzHouse · D · FL |
QMCOQUANTUM CORP /DE/ · Stock |
Purchase $1,001 - $15,000 |
Dec 29, 2021 | Dec 23, 2021 | Filing ↗ |
| Debbie Wasserman SchultzHouse · D · FL |
QMCOQUANTUM CORP /DE/ · Stock |
Purchase $1,001 - $15,000 |
Dec 29, 2021 | Dec 23, 2021 | Filing ↗ |
| Debbie Wasserman SchultzHouse · D · FL |
QMCOQUANTUM CORP /DE/ · Stock |
Purchase $1,001 - $15,000 |
Dec 29, 2021 | Dec 23, 2021 | Filing ↗ |
Whale Activity
Position changes in QMCO reported for 2026-09-30 by 1 tracked institutional filer
- Increased0
- New0
- Held0
- Decreased0
- Closed0
- No prior filing1
| Filer | Shares | Value | Change |
|---|---|---|---|
| Two Seas Capital LP | 1.5M | $47.3M | — |
KeyVex tracks a curated set of large 13F filers plus the largest positions in recent filings, so this is a sample of institutional activity, not the whole market.
Insider Trading
Net shares bought (+) or sold (−) on the open market by QMCO insiders, by quarter · Form 4
Recent Insider Transactions
296 transactions on record · newest first
| Insider | Type | Shares | Price | Value | Date | |
|---|---|---|---|---|---|---|
| Craythorne AnthonyChief Revenue Officer | Sale | −1,478 | $10.73 | $16K | Aug 3, 2026 | Form 4 ↗ |
| Nash Laura A.Chief Accounting Officer | Sale | −260 | $10.51 | $3K | Jul 2, 2026 | Form 4 ↗ |
| Meyrath HuguesPresident & CEO · Director | Sale | −6,232 | $10.51 | $65K | Jul 2, 2026 | Form 4 ↗ |
| FICHTHORN JOHNDirector · 10% owner | Grant / award | +3.1M | $5.19 | $16.0M | Jun 4, 2026 | Form 4 ↗ |
| FICHTHORN JOHNDirector · 10% owner | Conversion | +11.0M | $5.19 | $57.2M | Jun 4, 2026 | Form 4 ↗ |
| Dialectic Technology SPV LLC10% owner | Grant / award | +3.1M | $5.19 | $16.0M | Jun 4, 2026 | Form 4 ↗ |
| Dialectic Technology SPV LLC10% owner | Conversion | +11.0M | $5.19 | $57.2M | Jun 4, 2026 | Form 4 ↗ |
| Nash Laura A.Chief Accounting Officer | Sale | −109 | $5.44 | $593 | Apr 2, 2026 | Form 4 ↗ |
| White William HillisChief Financial Officer | Grant / award | +25.0K | $0.00 | $0 | Mar 4, 2026 | Form 4 ↗ |
| Craythorne AnthonyChief Revenue Officer | Grant / award | +15.0K | $0.00 | $0 | Jan 1, 2026 | Form 4 ↗ |
| Meyrath HuguesPresident & CEO · Director | Grant / award | +62.5K | $0.00 | $0 | Jan 1, 2026 | Form 4 ↗ |
| White Yue ZhouDirector | Grant / award | +12.0K | $0.00 | $0 | Jan 1, 2026 | Form 4 ↗ |
| Clancy James CDirector | Grant / award | +12.0K | $0.00 | $0 | Jan 1, 2026 | Form 4 ↗ |
| Blevins Tony JDirector | Grant / award | +12.0K | $0.00 | $0 | Jan 1, 2026 | Form 4 ↗ |
| Jaworksi DonDirector | Grant / award | +12.0K | $0.00 | $0 | Jan 1, 2026 | Form 4 ↗ |
| FICHTHORN JOHNDirector · 10% owner | Grant / award | +12.0K | $0.00 | $0 | Jan 1, 2026 | Form 4 ↗ |
| Tracy John R.Director | Grant / award | +12.0K | $0.00 | $0 | Jan 1, 2026 | Form 4 ↗ |
| Clancy James CDirector | Grant / award | +1,000 | $0.00 | $0 | Nov 1, 2025 | Form 4 ↗ |
| Blevins Tony JDirector | Grant / award | +1,000 | $0.00 | $0 | Nov 1, 2025 | Form 4 ↗ |
| Meyrath HuguesPresident & CEO · Director | Grant / award | +37.5K | $0.00 | $0 | Nov 1, 2025 | Form 4 ↗ |
Fund Holders
Mutual funds and ETFs holding QMCO · SEC Form N-PORT
| Fund | Shares | Value | % of fund | As of |
|---|---|---|---|---|
| VANGUARD TOTAL STOCK MARKET INDEX FUND VANGUARD INDEX FUNDS | 420.7K | $4.6M | 0.00% | Jun 30, 2026 |
| VANGUARD EXTENDED MARKET INDEX FUND VANGUARD INDEX FUNDS | 170.9K | $1.9M | 0.00% | Jun 30, 2026 |
| Mango Growth ETF ADVISORS' INNER CIRCLE FUND II | 90.3K | $961K | 0.34% | Jul 31, 2026 |
| Fidelity Extended Market Index Fund Fidelity Concord Street Trust | 44.0K | $428K | 0.00% | May 31, 2026 |
| iShares Micro-Cap ETF iShares Trust | 38.9K | $428K | 0.03% | Jun 30, 2026 |
| Fidelity Total Market Index Fund Fidelity Concord Street Trust | 27.5K | $267K | 0.00% | May 31, 2026 |
| Fidelity Series Total Market Index Fund Fidelity Concord Street Trust | 20.6K | $200K | 0.00% | May 31, 2026 |
| Ultra-Small Company Market Fund Bridgeway Funds, Inc. | 16.2K | $179K | 0.12% | Jun 30, 2026 |
| T. Rowe Price Extended Equity Market Index Fund T. ROWE PRICE INDEX TRUST, INC. | 11.0K | $121K | 0.01% | Jun 30, 2026 |
| ACUITAS US MICROCAP FUND FORUM FUNDS II | 10.8K | $119K | 0.10% | Jun 30, 2026 |
Mutual funds and ETFs whose N-PORT filings list QMCO's shares (CUSIP 747906600), each fund at its latest report since Mar 7, 2026, largest positions first. Bonds, options and short positions are left out.
Activist & Passive Stakes
Schedule 13D / 13G beneficial-ownership filings
- Anand ParekhSCHEDULE 13G · passive (13G) · 2.7M shares6.7%
Aug 14, 2026 · ↗ - Alyeska Fund GP, LLCSCHEDULE 13G · passive (13G) · 2.7M shares6.7%
Aug 14, 2026 · ↗ - Alyeska Investment Group, L.P.SCHEDULE 13G · passive (13G) · 2.7M shares6.7%
Aug 14, 2026 · ↗ - Sina ToussiSCHEDULE 13G · passive (13G) · 2.5M shares6.3%
Aug 14, 2026 · ↗ - Two Seas Capital GP LLCSCHEDULE 13G · passive (13G) · 2.5M shares6.3%
Aug 14, 2026 · ↗ - Two Seas Capital LPSCHEDULE 13G · passive (13G) · 2.5M shares6.3%
Aug 14, 2026 · ↗ - Oaktree Capital Management LPSCHEDULE 13G · passive (13G) · 2.0M shares5.1%
Aug 10, 2026 · ↗ - JOHN FICHTHORNSCHEDULE 13D/A · activist (13D) · 16.9M shares40.0%
Jun 8, 2026 · ↗ - Dialectic Technology Manager LLCSCHEDULE 13D/A · activist (13D) · 16.9M shares40.0%
Jun 8, 2026 · ↗ - Dialectic Technology SPV LLCSCHEDULE 13D/A · activist (13D) · 16.9M shares40.0%
Jun 8, 2026 · ↗
Corporate Lobbying
Estimated quarterly lobbying spending reported under the LDA, filings naming QUANTUM CORP /DE/ as client
No lobbying filings found naming QUANTUM CORP /DE/ as the client.
Government Contracts
Federal awards to quantum · USAspending
$30KAwarded · 1 contract on record
- Department of DefenseQUANTUM SCALAR SUPPORT$30K
Nov 30, 2023 · ↗
U.S. Patents
Recent USPTO applications naming QUANTUM CORP /DE/
No USPTO patent applications found for QUANTUM CORP /DE/.
Annual Financials
From QMCO's 10-K filings · XBRL
No annual XBRL figures on record for QMCO. KeyVex's fundamentals cover about 130 large companies so far.
Stock Splits
Every split and reverse split in the price history
- 1-for-20Reverse splitAug 27, 2024
- 1-for-8Reverse splitApr 19, 2017
Split dates and ratios from the price history · Close Prices from Tiingo.com
Material Events (8-K)
Corporate events filed with the SEC
- 8-K · Items 5.02, 8.01, 9.01Officer / director change · Other eventsSep 28, 2026
EDGAR ↗ - 8-K · Items 5.07Shareholder voteSep 17, 2026
EDGAR ↗ - 8-K · Items 5.02, 8.01, 9.01Officer / director change · Other eventsSep 1, 2026
EDGAR ↗ - 8-K · Items 5.02Officer / director changeAug 14, 2026
EDGAR ↗ - 8-K · Items 2.02, 9.01Results of operationsAug 10, 2026
EDGAR ↗ - 8-K · Items 2.02, 9.01Results of operationsJun 25, 2026
EDGAR ↗ - 8-K · Items 1.02, 5.08, 8.01Termination of agreement · Other eventsJun 5, 2026
EDGAR ↗ - 8-K · Items 1.01, 2.02, 2.03, 3.02, 8.01, 9.01Material agreement · Results of operations · Direct financial obligationJun 2, 2026
EDGAR ↗
About QUANTUM CORP /DE/
From SEC EDGAR company records
Industry (SIC 3572)Computer Storage Devices
SectorTechnology
HeadquartersCENTENNIAL, CO
IncorporatedDE
SEC CIK0000709283 ↗