What changed 10-K

Item 5. Market for Registrant’s Common Equity

2026-03-30 compared with 2025-03-31 · 3 added, 9 removed, 21 unchanged (36% of the section changed)

1 unchanged sentence

common stock is listed for quotation on the NYSE American under the symbol “ATNM”.

of March 28, 2025, there were 31,195,891 shares of common stock issued and outstanding, which were held by approximately 100 holders

As of March 30, 2026, there were 31,175,949 shares of common stock issued

and outstanding, which were held by approximately 100 holders of record.

There are no shares of preferred stock outstanding.

10 unchanged sentences

directors and consultants is 9,333,333 shares.

had two equity compensation plans that expired on September 9, 2023;

the Company’s Amended and Restated 2013 Stock Plan and the

Company’s 2013 Equity Incentive Plan.

following table indicates shares of common stock authorized for issuance under our equity compensation plans as of December 31, 2024:

following table indicates shares of common stock authorized for issuance under our equity compensation plan as of December 31, 2025:

Plan category

5 unchanged sentences

Equity compensation plans not approved by security holders

Includes shares issuable

upon the conversion of outstanding restricted stock units (“RSUs”).

The Weighted Average Exercise

Price column does not include an amount for outstanding RSUs.

Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.