TickerFacts.

X4 Pharmaceuticals, Inc (XFOR): Shares Outstanding

Annual figures by period end, from SEC filings.

Stock splits: 1-for-30, first reflected in a filing dated 2025-05-01. 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.

90.91M
As of 2025-12-31
96.11M
As of 2026-06-30
167.43M2017-12-31: 14.29M2018-12-31: 351.7K2019-12-31: 16.13M2020-12-31: 16.31M2021-12-31: 28.13M2022-12-31: 121.67M2023-12-31: 167.43M2024-12-31: 5.70M2025-12-31: 90.91M90.91M
2017-12-31 Shares Outstanding (shares) 2025-12-31

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

Period endedShares OutstandingChange YoYSource filing
2025-12-3190.91Mn/m2026-03-17, Balance as of period end
2024-12-315.70Mn/c2026-03-17, Balance as of period end
2023-12-31167.43M+37.6%2025-03-26, Balance as of period end
2022-12-31121.67M+332.6%2024-03-21, Balance as of period end
2021-12-3128.13M+72.5%2023-03-21, Balance as of period end
2020-12-3116.31M+1.1%2022-03-17, Balance as of period end
2019-12-3116.13Mn/m2021-03-19, Balance as of period end
2018-12-31351.7K-97.5%2020-03-12, Balance as of period end
2017-12-3114.29Mn/a2019-03-11, Balance as of period end