McMahon Michael E 4

4 · Boardwalk Pipeline Partners, LP · Filed Dec 15, 2017

Form 4

Period: 2017-12-15

Sr. VP, Gen. Counsel & Sec

Transactions

Exercise/Conversion
BWP (Common Units)
2017-12-15+12,886→ 12,886 total
Exercise/Conversion
BWP (Common Units)
2017-12-15+561.43→ 561.43 total
Exercise/Conversion
Phantom Units
2017-12-15−12,886→ 0 total
From: 2017-12-15Exp: 2017-12-15→ BWP (Common Units) (12,886 underlying)
Exercise/Conversion
Phantom Units
2017-12-15−561.43→ 17,356.07 total
From: 2017-12-15Exp: 2017-12-15→ BWP (Common Units) (561.43 underlying)
Disposition to Issuer
BWP (Common Units)
2017-12-15$15.44/sh−12,385.6$191,234→ 0 total
Disposition to Issuer
BWP (Common Units)
2017-12-15$15.44/sh−12,886$198,960→ 0 total
Tax Payment
BWP (Common Units)
2017-12-15$15.04/sh−561.43$8,444→ 0 total
Exercise/Conversion
Phantom Units
2017-12-15−12,385.6→ 0 total
From: 2017-12-15Exp: 2017-12-15→ BWP (Common Units) (12,385.6 underlying)
Exercise/Conversion
BWP (Common Units)
2017-12-15+12,385.6→ 12,385.6 total

Footnotes (2)

[F1]Each share of phantom units is the equivalent of one share of BWP common units. The reporting person settled his shares of phantom units for cash pursuant to the payment provisions in the reporting person's grant agreement.
[F2]Each share of phantom units is the equivalent of one share of BWP common units. This payment represents settlement of amounts accelerated and withheld to satisfy applicable tax withholding obligations related to the December 1, 2017, vesting event for which the reporting person elected to defer payment until December 2018 pursuant to the payment options and provisions in the reporting person's grant agreement.

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