Five Amrize Ltd insiders reported $838,852.44 in open-market $AMRZ purchases across seven Form 4 transactions on August 11 and August 12, 2026. The filers were the chief people officer, chief supply chain officer, chief financial officer, president, and chief technology officer. Amrize Ltd operates in the construction sector and carried a market capitalization of about $29.3 billion. All seven purchases reached the SEC on August 13, 2026, two days after the August 11 trades and one day after the August 12 trade.
Chief People Officer Stephen S. Clark made the largest single purchase, 5,260 shares at $47.31 per share, for $248,850.60. The trade left 10,637 shares in his account. Chief Financial Officer Baris Oran filed two buys. He paid $47.38 for 3,000 shares on August 11, totaling $142,140, and $47.13 for another 3,000 shares on August 12, totaling $141,390. The two purchases came to $283,530 and left him with 6,000 shares after the second buy. Chief Supply Chain Officer Mario Gross bought 3,200 shares at $46.62, or $149,184, and then 368 shares at $46.38, or $17,067.84. His combined total was $166,251.84, leaving 38,485 shares owned. President Jaime Hill bought 1,500 shares at $47.12 for $70,680 and reported 29,698 shares owned afterward. Chief Technology Officer Roald Brouwer bought 1,500 shares at $46.36 for $69,540 and reported 21,490 shares owned.
The August activity followed earlier $AMRZ Form 4 purchases by Amrize officers. In May 2026, Chief Executive Officer Jan Philipp Jenisch reported several open-market buys. They included 7,000 shares at $49.69 on May 19 for $347,830 and 13,417 shares at $49.69 on May 15 for $666,690.73. Brouwer reported a 1,500-share buy at $49.84 on May 21. Gross reported 1,200 shares at $48.63 on May 20, plus 1,800 shares at $49.47 and 1,000 shares at $48.63 on May 19. Clark reported a 2.152-share buy at $52.75 on May 5. In March 2026, Brouwer, Gross, and Hill each reported open-market $AMRZ purchases.
Representative Ro Khanna disclosed a separate $AMRZ purchase on May 21, 2026. That filing was reported 19 days later, on June 9, 2026. He also disclosed $AMRZ purchases on October 1 and October 3, 2025, reported 36 and 34 days later on November 6, 2025. Congressional dollar amounts are midpoint estimates of bracketed ranges. Each of those disclosures carried a $1,001 midpoint value.
The August 2026 filings extended a longer series of open-market $AMRZ purchases by Amrize insiders recorded in 2025 and 2026. The seven trades in the two-day window ranged from $46.36 to $47.38 per share. No sales or award transactions appeared among the August 11 and 12 filings.