144/A 0001193125-26-398628 0001564616 XXXXXXXX LIVE 0002018064 TechTarget, Inc. 001-42428 275 Grove Street Newton MA 02466 (617)-431-9200 Charles D. Rennick Officer Common Stock E*TRADE Securities LLC

PO Box 484 Jersey City NJ 07303-0484

4146 15962.10 72606498 09/23/2026 Nasdaq Common Stock 09/22/2026 RSU Vest TechTarget, Inc. N 9421 09/22/2026 N/A N Charles Rennick

275 Grove St Newton MA 02466

Common Stock 08/21/2026 3388 13043.89 These shares are being sold to cover withholding taxes due in connetion with the settlement of vested Restricted Stock Units. This amendment to the Form 144 filed on September 23, 2026, increases the number of shares to be sold by 106 shares and amends the aggregate market value in accordance with Instruction 3(d). The original filing underestimated the share count due to a lower-than-expected execution price in the tax withholding sell-to-cover transaction. 09/24/2026 /s/ Charles D. Rennick