Quantum-Si Inc (QSI): Weighted Average Diluted Shares

Annual figures by period end, from SEC filings.

Stock splits: 5-for-2, first reflected in a filing dated 2022-08-08. 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.

197.76M

Year ended 2025-12-31

+12.4%

3-year compound annual growth

+105.8%

5-year compound annual growth

2019-12-31 Weighted Average Diluted Shares (shares) 2025-12-31

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

Period ended	Weighted Average Diluted Shares	Change YoY	Source filing
2025-12-31	197.76M	+38.1%	2026-03-03, From 2025-01-01
2024-12-31	143.20M	+1.3%	2026-03-03, From 2024-01-01
2023-12-31	141.30M	+1.5%	2026-03-03, From 2023-01-01
2022-12-31	139.25M	+75.0%	2025-03-03, From 2022-01-01
2021-12-31	79.58M	n/m	2024-02-29, From 2021-01-01
2020-12-31	5.36M	n/c	2023-03-17, From 2020-01-01
2019-12-31	5.15M	n/a	2022-03-01, From 2019-01-01