TickerFacts.

Quantum Corp (QMCO): Shares Outstanding

Annual figures by period end, from SEC filings.

Stock splits: 1-for-8, first reflected in a filing dated 2017-06-01; 1-for-20, first reflected in a filing dated 2024-11-14. Figures are as filed: per-share figures and share counts last reported before a split are on the old share basis, so changes and growth rates across a split are not shown. Splits are read from the filings' own restatements, so a share conversion in a merger or reorganization shows up the same way.

14.64M
As of 2026-03-31
39.38M
As of 2026-06-30
258.21M2011-03-31: 227.31M2012-03-31: 236.40M2013-03-31: 243.08M2014-03-31: 250.41M2015-03-31: 258.21M2016-03-31: 33.28M2017-03-31: 34.06M2017-06-30: 34.10M2017-09-30: 34.66M2017-12-31: 35.08M2018-03-31: 35.44M2018-06-30: 35.44M2018-09-30: 35.56M2018-12-31: 35.55M2019-03-31: 36.04M2020-03-31: 39.91M2021-03-31: 56.91M2022-03-31: 60.43M2022-06-30: 90.61M2022-12-31: 93.14M2023-03-31: 93.57M2023-12-31: 95.85M2024-03-31: 4.79M2024-12-31: 5.31M2025-03-31: 6.96M2026-03-31: 14.64M14.64M
2011-03-31 Shares Outstanding (shares) 2026-03-31

Paler bars were last filed before a stock split, on the old share basis.

Period endedShares OutstandingChange YoYSource filing
2026-03-3114.64M+110.3%2026-06-25, Balance as of period end
2025-03-316.96Mn/a2026-06-25, Balance as of period end
2024-12-315.31Mn/a2025-08-26, Balance as of period end
2024-03-314.79Mn/c2025-08-26, Balance as of period end
2023-12-3195.85Mn/a2024-06-28, Balance as of period end
2023-03-3193.57Mn/a2024-06-28, Balance as of period end
2022-12-3193.14Mn/a2024-06-28, Balance as of period end
2022-06-3090.61Mn/a2024-06-28, Balance as of period end
2022-03-3160.43M+6.2%2024-06-28, Balance as of period end
2021-03-3156.91Mn/c2022-06-08, Balance as of period end
2020-03-3139.91M+10.7%2021-05-26, Balance as of period end
2019-03-3136.04Mn/a2020-06-24, Balance as of period end
2018-12-3135.55Mn/a2019-08-06, Balance as of period end
2018-09-3035.56Mn/a2019-08-06, Balance as of period end
2018-06-3035.44Mn/a2019-08-06, Balance as of period end
2018-03-3135.44Mn/a2019-08-06, Balance as of period end
2017-12-3135.08Mn/a2019-08-06, Balance as of period end
2017-09-3034.66Mn/a2019-08-06, Balance as of period end
2017-06-3034.10Mn/a2019-08-06, Balance as of period end
2017-03-3134.06M+2.4%2019-08-06, Balance as of period end
2016-03-3133.28Mn/c2017-06-01, Balance as of period end
2015-03-31258.21M+3.1%2016-06-03, Balance as of period end
2014-03-31250.41M+3.0%2015-06-12, Balance as of period end
2013-03-31243.08M+2.8%2014-06-06, Balance as of period end
2012-03-31236.40M+4.0%2013-06-07, Balance as of period end
2011-03-31227.31Mn/a2012-06-14, Balance as of period end