Quick Answer
X4 Pharmaceuticals, Inc reported Shares Outstanding of 90.91 million shares for fiscal year 2025.
X4 Pharmaceuticals, Inc Shares Outstanding — Annual History
| Fiscal Year | Shares Outstanding | YoY Change |
|---|---|---|
| 2025 | 90.91M | +1495.4% |
| 2024 | 5.70M | -96.6% |
| 2023 | 167.43M | +37.6% |
| 2022 | 121.67M | +332.6% |
| 2021 | 28.13M | +72.5% |
| 2020 | 16.31M | +1.1% |
| 2019 | 16.13M | +4486.6% |
| 2018 | 351,652 | -97.5% |
| 2017 | 14.29M | — |
Quarterly Shares Outstanding
| Quarter Ending | Shares Outstanding | YoY | QoQ |
|---|---|---|---|
| September 30, 2025 | 25.15M | -85.1% | +215.9% |
| June 30, 2025 | 7.96M | -95.3% | +37.5% |
| March 31, 2025 | 5.79M | -96.6% | +1.6% |
| December 31, 2024 | 5.70M | -96.6% | -96.6% |
| September 30, 2024 | 168.51M | +2.3% | +0.2% |
| June 30, 2024 | 168.20M | +2.3% | +0.2% |
| March 31, 2024 | 167.94M | +37.4% | +0.3% |
| December 31, 2023 | 167.43M | +37.6% | +1.7% |
- X4 Pharmaceuticals, Inc showed an increase of +1495.4% in Shares Outstanding compared to the prior fiscal year.
- Over the 2017–2025 period, X4 Pharmaceuticals, Inc’s shares outstanding has grown by 536.0% (from 14.29 million shares to 90.91 million shares).
- The most recent figure is from X4 Pharmaceuticals, Inc’s fiscal year 2025 report (Form 10-K), filed with the SEC on March 17, 2026.
- All figures are sourced from SEC EDGAR XBRL filings, last verified June 17, 2026.
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