Form 4 Filing for William M. Thalman

This filing details a transaction by William M. Thalman, EVP & CFO of FOSTER L B CO (FSTR), on May 22, 2026. Thalman disposed of 1,178 shares of Common Stock at a price of $38.11 per share, resulting in 78,754 shares remaining. The disposed shares were used to cover taxes related to the vesting of restricted stock from the 2025-2027 LTIP. The filing also notes the inclusion of performance-based restricted stock units earned under the 2025-2027 and 2024-2026 Long Term Incentive Plans, which will settle in 2027 and 2026, respectively, upon committee certification. A limited power of attorney document is also included, authorizing specific individuals to act on Thalman's behalf for Section 16 filings.