X0508 4 2026-01-12 0 0001790340 Immuneering Corp IMRX 0001870076 Feinberg Peter 245 MAIN STREET SECOND FLOOR CAMBRIDGE MA 02142 1 0 0 0 0 Class A Common Stock 156766 D Class A Common Stock 392242 I General Partner of PF Associates L.P. Class A Common Stock 476615 I General Partner of PEF LLC. Class A Common Stock 2026-01-12 4 P 0 20000 4.3452 A 135441 I General Partner of S4K Investments LLC. This transaction was executed in multiple trades through a broker-dealer at prices ranging from $4.315 to $4.38. The price reported in this column reflects the weighted average purchase price. Upon request, the reporting person will provide to the SEC staff full information regarding the number of shares acquired at each price. /s/ Michael D. Bookman, Attorney-in-Fact for Peter Feinberg 2026-01-14