Shanahan Kathleen M 4

What Happened

• Kathleen M. Shanahan, a director of Mosaic Co. (MOS), had 4,873 derivative units converted to common shares on 2026-05-28 (exercise/conversion, price $0.00; reported value $0). An equal number (4,873) were also reported as disposed the same date (price $0.00; reported value $0), consistent with a withholding or net-settlement action rather than an open-market sale. Separately on 2026-05-28 she was granted 7,273 restricted stock units (RSUs) (award, price $0.00; reported value $0) that are recorded as derivative interests.

Key Details

• Transaction date: 2026-05-28; Form 4 filed 2026-06-01 (appears timely — within the two business-day filing window).
• Exercise/conversion: 4,873 shares acquired at $0.00 (derivative conversion); 4,873 shares disposed at $0.00 (derivative).
• Grant: 7,273 RSUs awarded at $0.00 (derivative award).
• Footnotes: F1 = One-for-one conversion; F4 notes the 4,873 RSUs vested on the date of Mosaic's 2026 Annual Meeting; F2 notes the 7,273 RSUs will vest and be paid at the 2027 Annual Meeting.
• Shares owned after transaction: not specified in the excerpt of the filing.

Context

• These transactions appear compensation-related (RSU vesting and a new RSU grant) rather than open-market trading. The simultaneous acquisition and disposition of 4,873 derivative shares is commonly used to satisfy tax withholding or net-settlement obligations when RSUs vest (no cash proceeds reported). The 7,273 RSU grant will vest in 2027 per the filing.