TALEN ENERGY CORPORATION

Talen Energy Corporation is a publicly traded company (Nasdaq: TLN) with common stock held by a broad base of institutional and individual investors; U.S. securities law does not require disclosure of a listed issuer’s complete shareholder register, so ownership information here is limited to the significant holders that report their positions to the U.S. Securities and Exchange Commission. As of 4 September 2026, the largest reported holders were Vanguard Group Inc, with approximately 14.5% of shares outstanding, and Rubric Capital Management LP, with approximately 11.7%; three further institutional holders — an index fund managed by Vanguard, an ETF managed by Virtus, and SmallCap World Fund Inc — each held roughly 1.2%-1.6%. Vanguard and Rubric Capital have both filed Schedule 13G disclosures with the SEC reporting passive institutional stakes in the company, though reported percentages shift between filings as share counts and total shares outstanding change; Vanguard also reorganized how certain of its funds report Talen Energy Corporation holdings in January 2026, which can affect how its position appears across different snapshots.

All disclosed holders are investment companies or asset managers rather than individuals, and none is reported as exercising control beyond a passive investment stake. No ultimate beneficial owner can be identified from this information, and none should be inferred merely from the presence of a large institutional shareholder.

This shareholder information is major-shareholders-only: it reflects the largest holders identified in periodic SEC filings and public share-ownership data as of the date above, not a complete list of Talen Energy Corporation’s shareholders, which for a Nasdaq-listed issuer numbers in the thousands.

Talen Energy Corporation’s officer information combines a Texas Secretary of State filing, which lists a small number of named officers without consistently recording appointment or resignation dates, with the company’s own SEC disclosures, which are more current. Neither source discloses officer nationality, so nationality is not stated for any individual; a person’s country of residence or a U.S. correspondence address is not evidence of nationality and is not treated as such here. As of the company’s most recent SEC disclosures, Mark “Mac” McFarland serves as Chief Executive Officer and a director, with an employment agreement running through February 2027. Rajat Prakash has served in Treasury and Investor Relations since joining as Treasurer in August 2022, consistent with the appointment date carried in the Texas filing.

Talen Energy Corporation announced a realignment of its senior executive team effective December 2025. Terry L. Nutt was promoted from Chief Financial Officer to President. Cole Muller was appointed Chief Financial Officer in his place. Brad Berryman, previously Chief Nuclear Officer, was appointed Chief Operating Officer, with Ed Casulli appointed Chief Nuclear Officer; Dale Lebsack, who had held the Chief Fossil Officer role referenced in the Texas filing, moved to a newly created Chief Asset Development Officer position. These changes were reported in the company’s Form 8-K filed with the SEC on 15 December 2025.

The underlying Texas state filing predates these December 2025 changes and continues to list at least one former officer — a past President and Chief Financial Officer — who, according to Talen Energy Corporation’s own SEC disclosures, left the company in May 2023; this illustrates that the state filing is not always updated promptly after executive departures and should not be read as a current roster on its own. Officer nationality is not published in either source reviewed.

Talen Energy Corporation sits at the top of its own corporate group. Its SEC filings do not disclose any parent company, and the company describes itself as a holding company whose material businesses and properties are held entirely through its direct, wholly owned subsidiary, Talen Energy Supply, LLC, a Texas-registered entity. This direct-subsidiary relationship is confirmed in Talen Energy Corporation’s own periodic SEC filings, distinct from the wider subsidiary list captured in registry data, which shows more than twenty further indirect subsidiaries reached through additional intermediate holding entities.

The great majority of these indirect subsidiaries are formed or registered in the states where Talen’s power-generation assets are located — chiefly Texas, Pennsylvania, Maryland, Montana and New Jersey — consistent with a structure in which individual generating plants, including the Susquehanna nuclear facility, are typically held through dedicated project-level entities beneath Talen Energy Supply, LLC rather than directly by the parent. No ownership percentages for these intermediate and lower-tier entities are disclosed in the sources reviewed, and none should be assumed to be less than wholly owned absent confirmation.

Group-structure information for Talen Energy Corporation should be treated as partial: the direct-subsidiary relationship with Talen Energy Supply, LLC is confirmed by SEC disclosure, while the remaining entities in the group depend on state-registry filings that are not always current and do not themselves state ownership percentages or a filing date.