Form 4 Filing for William P. Noglows

This filing details transactions made by William P. Noglows, a director at LITTELFUSE INC /DE. On September 3, 2026, Mr. Noglows acquired 6 shares of Common Stock at $414.24 per share, bringing his post-transaction total to 22,186 shares. This acquisition is related to reinvested dividends from shares held in a deferred compensation plan. Additionally, he acquired 1 share of Common Stock at the same price, bringing his post-transaction total to 22,187 shares, attributed to accrued dividends on unvested restricted stock units. Footnote F2 indicates a previous overstatement of 2 shares in a prior filing. Mr. Noglows also holds 5,000 shares of Common Stock indirectly through trusts for his son and daughter. The filing was signed on September 8, 2026.