3M CO — Director's Dealing 2007

Aug 1, 2007

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2007-07-31

Reporting Person: CAMPBELL PATRICK D (VICE PRESIDENT FINANCE & CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2007-07-31	Common Stock	M	25906	$55.975	Acquired	42737	Direct
2007-07-31	Common Stock	F	16178	$89.63	Disposed	26559	Direct
2007-07-31	Common Stock	F	3493	$89.63	Disposed	23066	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2007-07-31	Non-Qualified Stock Option (right to buy)	$55.975	M	25906	Disposed	2012-02-01	Common Stock (25906)	Direct
2007-07-31	Non-Qualified Stock Option (right to buy)	$89.65	A	19671	Acquired	2012-02-01	Common Stock (19671)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	818	Indirect
Common Stock	3529	Indirect
Common Stock	1589	Indirect