QMCO — QUANTUM CORP
Reported value held$22.81M
Funds holding (latest)30
SectorTechnology
Funds holding (Q2 2026)17
Institutional value$18.40M · 1.70M sh
New / Add / Cut / Exit8 / 8 / 1 / 0
Top-5 / Top-10 concentration88.2% / 96.6%
Institutional holdings change
Accumulating +181.1%
(+1.09M sh)
Institutional value change
Up +565.5%
As of Q2 2026, 17 SEC-registered investment managers reported holding QMCO (QUANTUM CORP) in their latest 13F filings, with a combined reported value of $18.40M across 1.70M shares. That is +181.1% by share count (+1.09M shares) versus the previous quarter, while reported value moved +565.5%. Ownership is concentrated: the five largest holders account for 88.2% of reported value and the top ten for 96.6%.
Compared with the prior quarter, 8 opened new positions, 8 added to existing stakes, 1 trimmed. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.
QMCO is classified in the Technology sector.
All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.
Q2 2026 — 17 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Marshall Wace history | 713.08K | $7.84M | 0.01% | Add |
| BlackRock Inc history | 273.03K | $3.00M | 0.00% | Add |
| Bank of America Corp history | 170.13K | $1.87M | 0.00% | Add |
| Geode Capital Management history | 164.60K | $1.81M | 0.00% | Add |
| Renaissance Technologies history | 154.52K | $1.70M | 0.00% | New |
| UBS Group AG history | 46.11K | $507.17K | 0.00% | Reduce |
| Northern Trust Corp history | 33.22K | $365.42K | 0.00% | Add |
| Millennium Management history | 21.75K | $239.31K | 0.00% | New |
| Citadel Advisors history | 20.60K | $226.60K | 0.00% | New |
| Goldman Sachs Group history | 19.15K | $210.68K | 0.00% | New |
| Morgan Stanley history | 15.49K | $170.41K | 0.00% | Add |
| Citigroup Inc history | 14.43K | $158.69K | 0.00% | New |
| Wells Fargo & Co history | 11.30K | $124.30K | 0.00% | Add |
| Invesco Ltd history | 10.84K | $119.23K | 0.00% | New |
| JPMorgan Chase & Co history | 3.68K | $43.61K | 0.00% | New |
| Fidelity Management & Research (FMR) history | 106 | $1.17K | 0.00% | New |
| T. Rowe Price Associates history | 25.07K | $276 | 0.00% | Add |
Q1 2026 — 9 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| BlackRock Inc history | 217.53K | $1.03M | 0.00% | Reduce |
| Geode Capital Management history | 159.18K | $756.47K | 0.00% | Add |
| UBS Group AG history | 99.07K | $470.57K | 0.00% | Reduce |
| Marshall Wace history | 37.53K | $178.26K | 0.00% | Add |
| Northern Trust Corp history | 28.76K | $136.62K | 0.00% | Hold |
| Bank of America Corp history | 20.48K | $97.30K | 0.00% | Hold |
| Morgan Stanley history | 15.18K | $72.10K | 0.00% | Add |
| Wells Fargo & Co history | 4.12K | $19.59K | 0.00% | Add |
| T. Rowe Price Associates history | 21.80K | $104 | 0.00% | Add |
Q4 2025 — 13 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Vanguard Group history | 625.54K | $4.03M | 0.00% | Add |
| BlackRock Inc history | 220.75K | $1.42M | 0.00% | Add |
| UBS Group AG history | 165.84K | $1.07M | 0.00% | Add |
| Geode Capital Management history | 156.87K | $1.01M | 0.00% | Add |
| Northern Trust Corp history | 28.76K | $185.51K | 0.00% | Add |
| Marshall Wace history | 21.74K | $140.22K | 0.00% | New |
| Bank of America Corp history | 20.54K | $132.45K | 0.00% | Add |
| Citigroup Inc history | 12.83K | $82.74K | 0.00% | New |
| Millennium Management history | 11.24K | $72.52K | 0.00% | New |
| Morgan Stanley history | 4.31K | $27.82K | 0.00% | Add |
| Wells Fargo & Co history | 3.52K | $22.74K | 0.00% | Add |
| T. Rowe Price Associates history | 15.90K | $103 | 0.00% | New |
| JPMorgan Chase & Co history | 8 | $52 | 0.00% | Hold |
Q3 2025 — 9 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Vanguard Group history | 303.60K | $3.01M | 0.00% | Add |
| UBS Group AG history | 162.60K | $1.61M | 0.00% | Add |
| BlackRock Inc history | 162.34K | $1.61M | 0.00% | Add |
| Geode Capital Management history | 79.43K | $788.16K | 0.00% | Add |
| Northern Trust Corp history | 11.69K | $115.94K | 0.00% | Hold |
| Morgan Stanley history | 3.36K | $33.30K | 0.00% | Reduce |
| Bank of America Corp history | 2.90K | $28.73K | 0.00% | Add |
| Wells Fargo & Co history | 240 | $2.38K | 0.00% | Reduce |
| JPMorgan Chase & Co history | 8 | $79 | 0.00% | Hold |
Q2 2025 — 14 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Vanguard Group history | 256.68K | $2.56M | 0.00% | Add |
| Marshall Wace history | 178.02K | $1.77M | 0.00% | New |
| BlackRock Inc history | 141.31K | $1.41M | 0.00% | Add |
| BlackRock Inc history | 141.31K | $1.41M | 0.00% | Add |
| Geode Capital Management history | 69.38K | $691.99K | 0.00% | Add |
| UBS Group AG history | 60.22K | $600.40K | 0.00% | Add |
| Morgan Stanley history | 45.73K | $455.97K | 0.00% | Add |
| Morgan Stanley history | 45.73K | $455.97K | 0.00% | Add |
| Northern Trust Corp history | 11.69K | $116.52K | 0.00% | Hold |
| Wells Fargo & Co history | 5.32K | $52.99K | 0.00% | Add |
| Citigroup Inc history | 1.24K | $12.32K | 0.00% | New |
| Bank of America Corp history | 662 | $6.60K | 0.00% | Reduce |
| JPMorgan Chase & Co history | 8 | $80 | 0.00% | Reduce |
| JPMorgan Chase & Co history | 8 | $80 | 0.00% | Reduce |
Q1 2025 — 12 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Vanguard Group history | 254.45K | $3.66M | 0.00% | Add |
| BlackRock Inc history | 129.23K | $1.86M | 0.00% | Add |
| BlackRock Inc history | 129.23K | $1.86M | 0.00% | Add |
| Bank of America Corp history | 75.31K | $1.08M | 0.00% | Hold |
| Geode Capital Management history | 63.58K | $914.47K | 0.00% | Add |
| UBS Group AG history | 21.99K | $316.16K | 0.00% | Add |
| Northern Trust Corp history | 11.69K | $168.06K | 0.00% | Add |
| JPMorgan Chase & Co history | 4.51K | $64.90K | 0.00% | Add |
| JPMorgan Chase & Co history | 4.51K | $64.90K | 0.00% | Add |
| Morgan Stanley history | 2.21K | $31.84K | 0.00% | Reduce |
| Morgan Stanley history | 2.21K | $31.84K | 0.00% | Reduce |
| Wells Fargo & Co history | 575 | $8.27K | 0.00% | Add |
New Positions (Q2 2026)
- Renaissance Technologies 154.52K sh · $1.70M
- Millennium Management 21.75K sh · $239.31K
- Citadel Advisors 20.60K sh · $226.60K
- Goldman Sachs Group 19.15K sh · $210.68K
- Citigroup Inc 14.43K sh · $158.69K
- Invesco Ltd 10.84K sh · $119.23K
- JPMorgan Chase & Co 3.68K sh · $43.61K
- Fidelity Management & Research (FMR) 106 sh · $1.17K
Fully Exited (vs previous quarter)
No tracked fund fully exited this quarter.
Fund Position History — shares by quarter (top 20 funds)
| Fund | Q2 2026 | Q1 2026 | Q4 2025 | Q3 2025 | Q2 2025 | Q1 2025 | Q4 2024 | Q3 2024 | Q2 2024 | Q1 2024 | Q4 2023 | Q3 2023 | Q2 2023 | Q1 2023 | Q4 2022 | Q3 2022 | Q2 2022 | Q1 2022 | Q4 2021 | Q3 2021 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Marshall Wace | 713.08K | 37.53K | 21.74K | — | 178.02K | — | 6.19K | — | — | — | — | — | — | — | — | — | 22.40K | — | — | — |
| BlackRock Inc | 273.03K | 217.53K | 220.75K | 162.34K | 141.31K | 129.23K | 126.10K | 42.62K | — | — | — | — | — | — | — | — | — | — | — | — |
| Bank of America Corp | 170.13K | 20.48K | 20.54K | 2.90K | 662 | 75.31K | 75.31K | 60 | 6.83K | 7.03K | 6.83K | 6.83K | 22.05K | 21.81K | 642 | 639 | 831 | 12.38K | 48.74K | 15.88K |
| Geode Capital Management | 164.60K | 159.18K | 156.87K | 79.43K | 69.38K | 63.58K | 52.14K | 52.14K | 1.02M | 962.75K | 962.75K | 962.75K | 1.00M | 994.64K | 977.14K | 919.08K | 658.50K | 1.07M | 976.70K | 1.01M |
| Renaissance Technologies | 154.52K | — | — | — | — | — | — | — | 21.40K | 13.80K | 20.40K | 17.67K | — | 31.69K | 151.81K | 104.06K | — | 12.86K | — | — |
| UBS Group AG | 46.11K | 99.07K | 165.84K | 162.60K | 60.22K | 21.99K | 11.66K | 689 | — | 9.55K | 13.12K | 264 | 125 | 662 | 4.15K | 4.52K | — | 10.59K | 26.55K | — |
| Northern Trust Corp | 33.22K | 28.76K | 28.76K | 11.69K | 11.69K | 11.69K | 10.41K | 11.19K | 223.90K | 189.13K | 199.66K | 203.04K | 203.04K | 199.20K | 158.53K | 158.53K | 137.04K | 483.59K | 494.45K | 525.66K |
| Millennium Management | 21.75K | — | 11.24K | — | — | — | — | — | 11.78K | 15.89K | 105.55K | 128.60K | 350.30K | 621.67K | 373.28K | 392.47K | 937.67K | — | 193.14K | 98.93K |
| Citadel Advisors | 20.60K | — | — | — | — | — | — | — | — | 32.40K | 182.09K | — | 251.72K | 145.75K | 73.25K | 33.11K | 293.63K | 26.39K | 128.66K | 17.13K |
| Goldman Sachs Group | 19.15K | — | — | — | — | — | — | — | — | 35.18K | 20.64K | 25.15K | 11.97K | — | 24.82K | 458.17K | 509.79K | 182.05K | 416.00K | 497.52K |
| Morgan Stanley | 15.49K | 15.18K | 4.31K | 3.36K | 45.73K | 2.21K | 4.33K | 601 | 21.08K | 22.21K | 10.75K | 9.87K | 20.16K | 21.85K | 27.83K | 47.99K | 136.93K | 16.87K | 17.37K | 63.20K |
| Citigroup Inc | 14.43K | — | 12.83K | — | 1.24K | — | — | — | — | — | — | — | — | — | — | — | 608 | 2.55K | 15.20K | 6.54K |
| Wells Fargo & Co | 11.30K | 4.12K | 3.52K | 240 | 5.32K | 575 | 1 | — | — | 755 | 743 | 705 | 15.77K | 5.74K | 5.73K | 5.74K | 758 | 12.27K | 34.92K | 538 |
| Invesco Ltd | 10.84K | — | — | — | — | — | — | — | — | — | — | — | — | — | 144.22K | 144.95K | 153.04K | 140.06K | 48.35K | 60.83K |
| JPMorgan Chase & Co | 3.68K | — | 8 | 8 | 8 | 4.51K | 8 | 16 | 356 | 353 | 294 | 272 | 177 | 177 | 177 | 177 | 50.81K | 171.14K | 224.08K | 762.86K |
| Fidelity Management & Research (FMR) | 106 | — | — | — | — | — | 23 | — | — | 15 | — | — | 55 | 26 | 1.59K | — | 516 | 189 | — | — |
| T. Rowe Price Associates | 25.07K | 21.80K | 15.90K | — | — | — | 5.03K | — | 100.60K | 100.60K | 175.20K | 175.20K | 146.40K | 146.40K | 146.40K | 146.40K | 126.00K | 107.28K | 54.58K | 44.38K |
| Vanguard Group | — | — | 625.54K | 303.60K | 256.68K | 254.45K | 242.18K | 245.90K | 5.02M | 5.02M | 5.02M | 5.02M | 5.02M | 5.04M | 4.78M | 3.96M | 2.81M | 2.75M | 2.57M | 2.71M |
| Point72 Asset Management | — | — | — | — | — | — | — | — | — | — | — | — | — | 746 | — | — | — | — | — | — |
| Deutsche Bank AG | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 31.08K | 184.66K | 182.83K |
▲ Bought Low (fund opened/added, stock rose ≥5% next quarter) ▼ Sold High (fund reduced, stock fell ≥5% next quarter)
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