DU PONT E I DE NEMOURS & CO

CUSIP: 263534109 Class: COM

BERKSHIRE ASSET MANAGEMENT LLC/PA's Holding History (CIK: 0000949012)

Note: Option positions (PUT/CALL) are excluded.

Q2 2017
Shares 3,328 Value ($000) $269 Avg Close — Range —
Q1 2015
Shares 2,812 Value ($000) $201 Avg Close — Range —
Q4 2013
Shares 3,437 Value ($000) $223 Avg Close — Range —