Results of Operations and Financial Condition. On July 30, 2026, Exponent, Inc. issued a press release announcing its financial results for the second quarter ended July 3, 2026. The press release is attached hereto as Exhibit 99.1 and incorporated by reference.

Regulation FD Disclosure. On July 30, 2026, Exponent, Inc. announced that its Board of Directors has declared a quarterly cash dividend of $0.31 per share to be paid on September 18, 2026, to all common stockholders of record as of September 4, 2026. The Board of Directors also authorized an additional $50 million for share repurchases. A copy of the press release announcing the dividend and additional share repurchase authorization is attached hereto as Exhibit 99.2 and is incorporated herei…

Regulation FD Disclosure. On April 30, 2026, Exponent, Inc. announced that its Board of Directors has declared a quarterly cash dividend of $0.31 per share to be paid on June 18, 2026, to all common stockholders of record as of June 5, 2026. The Board of Directors also authorized an additional $50 million for share repurchases. This is in addition to the $17.7 million available for repurchase as of April 3, 2026. A copy of the press release announcing the dividend and additional share repurch…

Results of Operations and Financial Condition. On April 30, 2026, Exponent, Inc. issued a press release announcing its financial results for the first quarter ended April 3, 2026. The press release is attached hereto as Exhibit 99.1 and incorporated by reference.

President, CFO — John D. Pye, Eric Anderson: Dr. John D. Pye was promoted to President and Mr. Eric Anderson was promoted to Chief Financial Officer, both effective May 1, 2026.

Results of Operations and Financial Condition. On February 5, 2026, Exponent, Inc. issued a press release announcing its financial results for the fourth quarter ended January 2, 2026. The press release is attached hereto as Exhibit 99.1 and incorporated by reference.

Regulation FD Disclosure. On February 5, 2026, Exponent, Inc. announced that its Board of Directors has declared a quarterly cash dividend of $0.31 per share to be paid on March 20, 2026, to all common stockholders of record as of March 6, 2026. A copy of the press release announcing the dividend is attached hereto as Exhibit 99.2 and is incorporated herein by reference.

Regulation FD Disclosure. On October 30, 2025, Exponent, Inc. announced that its Board of Directors has declared a quarterly cash dividend of $0.30 per share to be paid on December 19, 2025, to all common stockholders of record as of December 5, 2025. The Board of Directors also authorized an additional $100 million for share repurchases. This is in addition to the $21.6 million available for repurchase as of October 3, 2025. A copy of the press release announcing the dividend and additional…

Results of Operations and Financial Condition. On October 30, 2025, Exponent, Inc. issued a press release announcing its financial results for the third quarter ended October 3, 2025. The press release is attached hereto as Exhibit 99.1 and incorporated by reference.

Regulation FD Disclosure. On July 31, 2025, Exponent, Inc. announced that its Board of Directors has declared a quarterly cash dividend of $0.30 per share to be paid on September 19, 2025 to all common stockholders of record as of September 5, 2025. A copy of the press release announcing the dividend is attached hereto as Exhibit 99.2 and is incorporated herein by reference.

Results of Operations and Financial Condition. On July 31, 2025, Exponent, Inc. issued a press release announcing its financial results for the second quarter ended July 4, 2025. The press release is attached hereto as Exhibit 99.1 and incorporated by reference.

Results of Operations and Financial Condition. On May 1, 2025, Exponent, Inc. issued a press release announcing its financial results for the first quarter ended April 4, 2025. The press release is attached hereto as Exhibit 99.1 and incorporated by reference.

Regulation FD Disclosure. On May 1, 2025, Exponent, Inc. announced that its Board of Directors has declared a quarterly cash dividend of $0.30 per share to be paid on June 20, 2025 to all common stockholders of record as of June 6, 2025. A copy of the press release announcing the dividend is attached hereto as Exhibit 99.2 and is incorporated herein by reference.

Results of Operations and Financial Condition. On February 6, 2025, Exponent, Inc. issued a press release announcing its financial results for the fourth quarter ended January 3, 2025. The press release is attached hereto as Exhibit 99.1 and incorporated by reference.

Regulation FD Disclosure. On February 6, 2025, Exponent, Inc. announced that its Board of Directors has declared a quarterly cash dividend of $0.30 per share to be paid on March 21, 2025 to all common stockholders of record as of March 7, 2025. A copy of the press release announcing the dividend is attached hereto as Exhibit 99.2 and is incorporated herein by reference.

Group Vice President — Eric Guyer, Ph.D.: The filing discloses the resignation of a Group Vice President, which is a senior officer departure but not a C-suite executive loss.

Regulation FD Disclosure. On October 24, 2024, Exponent, Inc. announced that its Board of Directors has declared a quarterly cash dividend of $0.28 per share to be paid on December 20, 2024 to all common stockholders of record as of December 6, 2024. A copy of the press release announcing the dividend is attached hereto as Exhibit 99.2 and is incorporated herein by reference.

Results of Operations and Financial Condition. On October 24, 2024, Exponent, Inc. issued a press release announcing its financial results for the third quarter ended September 27, 2024. The press release is attached hereto as Exhibit 99.1 and incorporated by reference.

Regulation FD Disclosure. On July 25, 2024, Exponent, Inc. announced that its Board of Directors has declared a quarterly cash dividend of $0.28 per share to be paid on September 20, 2024 to all common stockholders of record as of September 6, 2024. A copy of the press release announcing the dividend is attached hereto as Exhibit 99.2 and is incorporated herein by reference.

Results of Operations and Financial Condition. On July 25, 2024, Exponent, Inc. issued a press release announcing its financial results for the second quarter ended June 28, 2024. The press release is attached hereto as Exhibit 99.1 and incorporated by reference.

Entry into a Material Definitive Agreement. On June 19, 2024, Exponent, Inc. (the “Company”) received a fully executed and countersigned notice of election to extend its commercial land lease with the State of Arizona (the “Notice of Election”). Pursuant to the Notice of Election, the Company agreed to extend the lease for 15 years beginning on January 17, 2028. The Company is currently obligated to make payments under the lease of $1,009,000 per year, which obligation will continue at that l…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth in

Results of Operations and Financial Condition. On April 25, 2024, Exponent, Inc. issued a press release announcing its financial results for the first quarter ended March 29, 2024. The press release is attached hereto as Exhibit 99.1 and incorporated by reference.

Regulation FD Disclosure. On April 25, 2024, Exponent, Inc. announced that its Board of Directors has declared a quarterly cash dividend of $0.28 per share to be paid on June 21, 2024 to all common stockholders of record as of June 7, 2024. A copy of the press release announcing the dividend is attached hereto as Exhibit 99.2 and is incorporated herein by reference.

Chief Human Resources Officer — Brian Kundert: The filing discloses the internal promotion of an existing Vice President to the role of Chief Human Resources Officer.