TickerFacts.

Protagenic Therapeutics, Inc.\new (PTIX): Shares Outstanding

Annual figures by period end, from SEC filings.

Stock splits: 1-for-14, first reflected in a filing dated 2025-05-13. 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.

1.81M
As of 2026-03-31
1.81M
As of 2026-06-30
400.00M2014-06-30: 400.00M2015-06-30: 400.00M2015-12-31: 6.61M2016-12-31: 10.26M2017-12-31: 10.26M2018-12-31: 10.26M2019-12-31: 10.26M2020-12-31: 10.36M2021-12-31: 4.30M2022-12-31: 4.32M2023-12-31: 4.44M2024-12-31: 7.24M2025-03-31: 5.80M2026-03-31: 1.81M1.81M
2014-06-30 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
2026-03-311.81M-68.8%2026-08-14, Balance as of period end
2025-03-315.80Mn/c2026-08-14, Balance as of period end
2024-12-317.24M+63.3%2025-03-31, Balance as of period end
2023-12-314.44M+2.6%2025-03-31, Balance as of period end
2022-12-314.32M+0.4%2024-05-14, Balance as of period end
2021-12-314.30M-58.5%2023-03-31, Balance as of period end
2020-12-3110.36M+1.0%2022-04-07, Balance as of period end
2019-12-3110.26M0.0%2021-03-25, Balance as of period end
2018-12-3110.26M0.0%2020-04-29, Balance as of period end
2017-12-3110.26M0.0%2019-03-29, Balance as of period end
2016-12-3110.26Mn/c2018-04-02, Balance as of period end
2015-12-316.61Mn/a2017-05-08, Balance as of period end
2015-06-30400.00M0.0%2015-09-25, Balance as of period end
2014-06-30400.00Mn/a2015-09-25, Balance as of period end