Citadel Securities & Ken Griffin Report 6.0% Stake in First Solar ($FSLR)

Executive Summary

On October 15, 2026, Citadel Securities GP LLC, affiliated entities, and Kenneth Griffin jointly filed an amendment to Schedule 13G (Form 13G/A) reporting beneficial ownership in First Solar, Inc. (NASDAQ: FSLR). The event triggering the filing occurred on October 8, 2026, with holdings reported as of the market open on October 15, 2026. Kenneth Griffin is deemed to beneficially own an aggregate of 6,459,463 shares, representing approximately 6.0% of First Solar's outstanding common stock.

Entity Breakdown and Ownership Structure

• Kenneth Griffin: Deemed beneficial owner of 6,459,463 shares (6.0% ownership), with shared voting and dispositive power over all reported shares.
• Citadel Securities GP LLC & Citadel Securities Group LP: Deemed beneficial owners of 6,422,545 shares (6.0% ownership).
• Citadel Securities LLC: Deemed beneficial owner of 5,261,645 shares (4.9% ownership).
• Citadel Advisors Entities (Citadel Advisors LLC, Citadel Advisors Holdings LP, Citadel GP LLC): Deemed beneficial owners of 36,918 shares (<0.1% ownership).

Control Intent & Market Implications

• Passive Intent: The filing was made pursuant to Rule 13d-1(c) and includes Item 10 certification affirming that the securities were acquired in the ordinary course of business without the purpose or effect of changing or influencing control of the issuer.
• Significance: The holding highlights institutional and market-maker exposure to First Solar. Because this is an amendment to a passive Schedule 13G, the strategic implications remain consistent with liquidity provision and passive institutional positioning.