Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  3M CO
 2. Date of Event Requiring Statement (Month/Day/Year)
10/08/2010		 3. Issuer Name and Ticker or Trading Symbol
Cogent, Inc. [COGT]
(Last)
(First)
(Middle)
3M CENTER		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

ST. PAUL, MN 55144-1000		 6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 64,921,969
I
See Explanation of Responses (1) (2) (3) (4) (5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
3M CO
3M CENTER
ST. PAUL, MN 55144-1000		     X    
Ventura Acquisition Corp
3M CENTER
ST. PAUL, MN 55144-1000		     X    

Signatures

3M COMPANY by Gregg M. Larson, Deputy General Counsel and Secretary 10/26/2010
**Signature of Reporting Person Date
VENTURA ACQUISITION CORPORATION by Michael P. Delkoski, President and Director 10/26/2010
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) This statement is being filed by 3M Company ("3M") and Ventura Acquisition Corporation ("Purchaser" and, together with 3M, the "Reporting Persons"). Purchaser is a wholly-owned subsidiary of 3M.
(2) As of October 26, 2010, Purchaser beneficially owned directly, and 3M may be deemed to have beneficially owned indirectly, an aggregate of 64,921,969 shares of common stock, par value $0.001 per share (the "Shares") of Cogent, Inc. (the "Issuer").
(3) As disclosed in the Schedule TO filed with the Securities and Exchange Commission by 3M on September 10, 2010, as amended and supplemented, 3M, Purchaser and the Issuer entered into an Agreement and Plan of Merger dated August 29, 2010 (the "Merger Agreement"). Pursuant to the Merger Agreement, 3M and Purchaser commenced a tender offer to purchase all of the outstanding Shares at a purchase price of $10.50 per Share on September 10, 2010 (the "Initial Offering Period"). The Initial Offering Period expired at 12:00 midnight, New York City time, on Thursday, October 7, 2010. (Continued in Footnote 4)
(4) On October 8, 2010, 3M and Purchaser commenced a subsequent offering period for all remaining untendered Shares (the "Subsequent Offering Period"). The Subsequent Offering Period was scheduled to expire at 12:00 midnight, New York City time, on Friday, October 22, 2010. On October 25, 2010, 3M and Purchaser extended the Subsequent Offering Period for all remaining untendered Shares. The extended Subsequent Offering Period expired at 5:00 p.m., New York City time, on Tuesday, October 26, 2010.
(5) Pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any shares in excess of such amounts.

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