X0609 4 2026-06-08 false 0001050377 PC CONNECTION INC CNXN 0001186630 GALLUP PATRICIA false 730 MILFORD ROAD MERRIMACK NH 03054 true true true false Chairman & Chief Admin Officer 0001050377 PC CONNECTION INC false 730 MILFORD ROAD MERRIMACK NH 03054 false false true false true Common Stock 2026-06-08 4 S false 6379.00 72.05 D 7035676.00 I By Trust Common Stock 2026-06-08 4 S false 545.00 72.61 D 7035131.00 I By Trust Common Stock 2026-06-09 4 S false 3692.00 71.63 D 7031439.00 I By Trust Common Stock 2026-06-09 4 S false 3692.00 72.20 D 7027747.00 I By Trust Common Stock 2533258.00 D Common Stock 15133.00 I By Spouse Common Stock 906837.00 I By Trust Common Stock 275000.00 I By Trust Common Stock 1000000.00 I By Trust Common Stock 2000000.00 I By Trust The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the David Hall Trust 2003 on March 9, 2026. These shares are held directly by the Comack Trust-B, a grantor retained annuity trust formed under the laws of the State of New Hampshire. The reporting person is the sole trustee of the Comack Trust-B. These shares are held directly by the Abbott Brook Trust-B, a grantor retained annuity trust formed under the laws of the State of New Hampshire. The reporting person is the sole trustee of the Abbott Brook Trust-B. The reported price is a weighted average price. These shares were sold in multiple transactions at prices ranging from $71.51 to $72.50 per share, inclusive. The reporting person undertakes to provide PC Connection, Inc., any security holder of PC Connection, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each price within the range set forth in this footnote. These shares are held directly by the David Hall Trust 2003, an irrevocable trust formed under the laws of the State of New Hampshire. Ms. Gallup serves as the sole trustee and is the sole beneficiary of the shares held by the David Hall Trust 2003. The reported price is a weighted average price. These shares were sold in multiple transactions at prices ranging from $72.52 to $72.78 per share, inclusive. The reporting person undertakes to provide PC Connection, Inc., any security holder of PC Connection, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each price within the range set forth in this footnote. The reported price is a weighted average price. These shares were sold in multiple transactions at prices ranging from $71.03 to $72.02 per share, inclusive. The reporting person undertakes to provide PC Connection, Inc., any security holder of PC Connection, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each price within the range set forth in this footnote. The reported price is a weighted average price. These shares were sold in multiple transactions at prices ranging from $72.03 to $72.78 per share, inclusive. The reporting person undertakes to provide PC Connection, Inc., any security holder of PC Connection, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each price within the range set forth in this footnote. The reporting person disclaims beneficial ownership of these securities, except to the extent of such person's pecuniary interest therein. This report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose. These shares are held directly by the Abbott Brook Trust, a grantor retained annuity trust formed under the laws of the State of New Hampshire. The reporting person is the sole trustee of the Abbott Brook Trust. These shares are held directly by the North Branch Trust, an irrevocable trust formed under the laws of the State of New Hampshire. Ms. Gallup serves as the sole trustee of the North Branch Trust. /s/Patricia Gallup 2026-06-10 /s/Patricia Gallup, as Trustee of the David Hall Trust 2003 2026-06-10