NewMarket Corporation SC13D/A #1 - R. Robotti 07/06/2005


SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13D INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13D-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13D-2(a)

(Amendment No. 1)*
NewMarket Corporation

(Name of Issuer)

Common Stock, no par value

(Title of Class of Securities)

	651587 10 7

	(CUSIP Number)

Robert E. Robotti c/o Robotti & Company, Incorporated
52 Vanderbilt Avenue
New York, New York 10017

(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)

July 6, 2005

(Date of Event Which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box. [ ] Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See 13d-7 for other parties to whom copies are to be sent.
(Continued on following pages) (Page 1 of 14 Pages).
*The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

Schedule 13D
CUSIP No. 651587 10 7				Page 2 of 14 Pages


1.	Names of Reporting Persons. Robert E. Robotti
	I.R.S. Identification Nos. of above persons (entities only).



2.	Check the Appropriate Box if a Member of a Group (See Instructions)
	(a)
	(b)


3.	SEC Use Only


4.	Source of Funds
	PF, AF


5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)				[ ]


6.	Citizenship or Place of Organization
	United States
Number of		7.	Sole Voting Power: 1,980

Shares
Beneficially		8.	Shared Voting Power: 869,869

Owned by
Each		9.	Sole Dispositive Power: 1,980

Reporting
Person With		10.	Shared Dispositive Power: 869,869


11.	Aggregate Amount Beneficially Owned by Each Reporting Person
	871,849


12.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares [ ]



13.	Percent of Class Represented by Amount in Row (9)
	5.1%


14.	Type of Reporting Person (See Instructions)
	IN, HC

Schedule 13D
CUSIP No. 651587 10 7				Page 3 of 14 Pages


1.	Names of Reporting Persons. Robotti & Company, Incorporated
	I.R.S. Identification Nos. of above persons (entities only).




2.	Check the Appropriate Box if a Member of a Group (See Instructions)
	(a)
	(b)


3.	SEC Use Only


4.	Source of Funds
	WC


5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)				[ ]


6.	Citizenship or Place of Organization
	New York
Number of		7.	Sole Voting Power: -0-

Shares
Beneficially		8.	Shared Voting Power: 466,377

Owned by
Each		9.	Sole Dispositive Power: -0-

Reporting
Person With		10.	Shared Dispositive Power: 466,377


11.	Aggregate Amount Beneficially Owned by Each Reporting Person
	466,377


12.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares [ ]



13.	Percent of Class Represented by Amount in Row (9)
	2.7%


14.	Type of Reporting Person (See Instructions)
	CO, HC

Schedule 13D
CUSIP No. 651587 10 7				Page 4 of 14 Pages


1.	Names of Reporting Persons. Robotti & Company, LLC
	I.R.S. Identification Nos. of above persons (entities only).




2.	Check the Appropriate Box if a Member of a Group (See Instructions)
	(a)
	(b)


3.	SEC Use Only


4.	Source of Funds
	WC


5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)				[ ]


6.	Citizenship or Place of Organization
	New York
Number of		7.	Sole Voting Power: -0-

Shares
Beneficially		8.	Shared Voting Power: 16,022

Owned by
Each		9.	Sole Dispositive Power: -0-

Reporting
Person With		10.	Shared Dispositive Power: 16,022


11.	Aggregate Amount Beneficially Owned by Each Reporting Person
	16,022


12.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares [ ]



13.	Percent of Class Represented by Amount in Row (9)
	Less than 1%


14.	Type of Reporting Person (See Instructions)
	OO

Schedule 13D
CUSIP No. 651587 10 7				Page 5 of 14 Pages


1.	Names of Reporting Persons. Robotti & Company Advisors, LLC
	I.R.S. Identification Nos. of above persons (entities only).




2.	Check the Appropriate Box if a Member of a Group (See Instructions)
	(a)
	(b)


3.	SEC Use Only


4.	Source of Funds
	WC


5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)				[ ]


6.	Citizenship or Place of Organization
	New York
Number of		7.	Sole Voting Power: -0-

Shares
Beneficially		8.	Shared Voting Power: 450,355

Owned by
Each		9.	Sole Dispositive Power: -0-

Reporting
Person With		10.	Shared Dispositive Power: 450,355


11.	Aggregate Amount Beneficially Owned by Each Reporting Person
	450,355


12.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares [ ]



13.	Percent of Class Represented by Amount in Row (9)
	2.6%


14.	Type of Reporting Person (See Instructions)
	OO, IA

Schedule 13D
CUSIP No. 651587 10 7				Page 6 of 14 Pages


1.	Names of Reporting Persons. Suzanne Robotti
	I.R.S. Identification Nos. of above persons (entities only).




2.	Check the Appropriate Box if a Member of a Group (See Instructions)
	(a)
	(b)


3.	SEC Use Only


4.	Source of Funds
	PF


5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)				[ ]


6.	Citizenship or Place of Organization
	United States
Number of		7.	Sole Voting Power: 15,069

Shares
Beneficially		8.	Shared Voting Power: 3,000

Owned by
Each		9.	Sole Dispositive Power: 15,069

Reporting
Person With		10.	Shared Dispositive Power: 3,000


11.	Aggregate Amount Beneficially Owned by Each Reporting Person
	18,069


12.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares [ ]



13.	Percent of Class Represented by Amount in Row (9)
	Less than 1%


14.	Type of Reporting Person (See Instructions)
	IN

Schedule 13D
CUSIP No. 651587 10 7				Page 7 of 14 Pages


1.	Names of Reporting Persons. Suzanne and Robert Robotti Foundation, Incorporated
	I.R.S. Identification Nos. of above persons (entities only).




2.	Check the Appropriate Box if a Member of a Group (See Instructions)
	(a)
	(b)


3.	SEC Use Only


4.	Source of Funds
	WC


5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)				[ ]


6.	Citizenship or Place of Organization
	Delaware
Number of		7.	Sole Voting Power:-0-

Shares
Beneficially		8.	Shared Voting Power: 3,000

Owned by
Each		9.	Sole Dispositive Power: -0-

Reporting
Person With		10.	Shared Dispositive Power: 3,000


11.	Aggregate Amount Beneficially Owned by Each Reporting Person
	3,000


12.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares [ ]



13.	Percent of Class Represented by Amount in Row (9)
	Less than 1%


14.	Type of Reporting Person (See Instructions)
	CO

Schedule 13D
CUSIP No. 651587 10 7				Page 8 of 14 Pages


1.	Names of Reporting Persons. Kenneth R. Wasiak
	I.R.S. Identification Nos. of above persons (entities only).




2.	Check the Appropriate Box if a Member of a Group (See Instructions)
	(a)
	(b)


3.	SEC Use Only


4.	Source of Funds
	AF


5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)				[ ]


6.	Citizenship or Place of Organization
	United States
Number of		7.	Sole Voting Power: -0-

Shares
Beneficially		8.	Shared Voting Power: 385,423

Owned by
Each		9.	Sole Dispositive Power: -0-

Reporting
Person With		10.	Shared Dispositive Power: 385,423


11.	Aggregate Amount Beneficially Owned by Each Reporting Person
	385,423


12.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares [ ]



13.	Percent of Class Represented by Amount in Row (9)
	2.3%


14.	Type of Reporting Person (See Instructions)
	IN, HC

Schedule 13D
CUSIP No. 651587 10 7				Page 9 of 14 Pages


1.	Names of Reporting Persons. Ravenswood Management Company, L.L.C.
	I.R.S. Identification Nos. of above persons (entities only).




2.	Check the Appropriate Box if a Member of a Group (See Instructions)
	(a)
	(b)


3.	SEC Use Only


4.	Source of Funds
	WC


5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)				[ ]


6.	Citizenship or Place of Organization
	New York
Number of		7.	Sole Voting Power: -0-

Shares
Beneficially		8.	Shared Voting Power: 385,423

Owned by
Each		9.	Sole Dispositive Power: -0-

Reporting
Person With		10.	Shared Dispositive Power: 385,423


11.	Aggregate Amount Beneficially Owned by Each Reporting Person
	385,423


12.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares [ ]



13.	Percent of Class Represented by Amount in Row (9)
	2.3%


14.	Type of Reporting Person (See Instructions)
	OO

Schedule 13D
CUSIP No. 651587 10 7				Page 10 of 14 Pages


1.	Names of Reporting Persons. The Ravenswood Investment Company, L.P.
	I.R.S. Identification Nos. of above persons (entities only).




2.	Check the Appropriate Box if a Member of a Group (See Instructions)
	(a)
	(b)


3.	SEC Use Only


4.	Source of Funds
	WC


5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)				[ ]


6.	Citizenship or Place of Organization
	New York
Number of		7.	Sole Voting Power: -0-

Shares
Beneficially		8.	Shared Voting Power: 385,423

Owned by
Each		9.	Sole Dispositive Power: -0-

Reporting
Person With		10.	Shared Dispositive Power: 385,423


11.	Aggregate Amount Beneficially Owned by Each Reporting Person
	385,423


12.	Check if the Aggregate Amount in Row (9) Excludes Certain Shares [ ]



13.	Percent of Class Represented by Amount in Row (9)
	2.3%


14.	Type of Reporting Person (See Instructions)
	PN

SCHEDULE 13D
CUSIP No.651587 10 7						Page 11 of 14 Pages

This Statement on Schedule 13D Amendment No. 1 (this "Amendment") is filed on behalf of the Reporting Persons with the Securities and Exchange Commission (the "Commission"). This Amendment amends the initial Statement of Beneficial Ownership on Schedule 13D (the "Initial Statement") relating to shares of the Common Stock, without par value (the "Common Stock"), of NewMarket Corporation (the "Issuer") filed on August 1, 2005 with the Commission as specifically set forth herein. Capitalized terms used herein and not otherwise defined herein shall have the same meanings ascribed to them in the Initial Statement.

Item 3.		Source and Amount of Funds or Other Consideration

		Item 3 of the Initial Statement is hereby amended and restated to read as follows:

The aggregate purchase price of the 1,980 shares of Common Stock held by Mr. Robotti is $22,127.22 (including brokerage fees and expenses). All of the shares of Common Stock beneficially held by Mr. Robotti were paid for using his personal funds.

The aggregate purchase price of the 16,022 shares of the Common Stock held by Robotti & Company is $296,702.42 (including brokerage fees and expenses). All of the shares of Common Stock beneficially held by Robotti & Company were paid for using the working capital of its discretionary customers.

The aggregate purchase price of the 450,355 shares of the Common Stock held by Robotti Advisors is $5,041,876.99 (including brokerage fees and expenses). All of the shares of Common Stock beneficially held by Robotti Advisors were paid for using the working capital of its clients.

The aggregate purchase price of the 15,069 shares of the Common Stock held by Suzanne Robotti is $167,652.19 (including brokerage fees and expenses). All of the shares of Common Stock beneficially held by Suzanne Robotti were paid for using her personal funds.

The aggregate purchase price of the 3,000 shares of the Common Stock held by Robotti Foundation is $43,173.90 (including brokerage fees and expenses). All of the shares of Common Stock beneficially held by Robotti Foundation were paid for using its working capital.

The aggregate purchase price of the 385,423 shares of the Common Stock held by RIC is $3,016,330.75 (including brokerage fees and expenses). All of the shares of Common Stock beneficially held by RIC were paid for using its working capital.

Item 5.	Interest in Securities of the Issuer

	Item 5 of the Initial Statement is hereby amended and restated to read as follows:

(a)-(b) As of August 30, 2005, the aggregate number of shares of Common Stock and percentage of the outstanding Common Stock of the Issuer beneficially owned (i) by each of the Reporting Persons, and (ii) to the knowledge of the Reporting Persons, by each other person who may be deemed to be a member of a group, is as follows:
Reporting Person			Aggregate Number of Shares	Number of Shares: Sole Power to Vote or Dispose	Number of Shares: Shared Power to Vote or Dispose		Approximate Percentage*


Robotti (1)(2)(3)(4)(6)(7)(8)			871,849	1,980	869,869		5.1%
ROBT (1)(3)(4)			466,377	0	466,377		2.7%
Robotti & Company (1)(3)			16,022	0	16,022		**

SCHEDULE 13D
CUSIP No. 651587 10 7							Page 12 of 14 Pages

Robotti Advisors (1)(4)	450,355		0		450,355		2.6%
Suzanne Robotti (1)(5)(6)	18,069		15,069		3,000		**
Robotti Foundation (1)(7)	3,000		0		3,000		**
Wasiak (1)(8)	385,423		0		385,423		2.3%
RMC (1)(8)	385,423		0		385,423		2.3%
RIC (1)(8)	385,423		0		385,423		2.3%

Based on 17,039,059 shares of Common Stock, without par value, outstanding as of July 31, 2005, as disclosed in the Issuer's Quarterly Report on Form 10-Q, for the quarter ended June 30, 2005. ^** Less than one percent. (1) Each of the Reporting Persons disclaims beneficial ownership of the securities held by the other Filing Parties except to the extent of such Reporting Person's pecuniary interest therein, if any. (2) Mr. Robotti has the sole power to vote or direct the vote, and has the sole power to dispose or to direct the disposition of 1,980 shares of Common Stock held in his personal accounts. (3) Each of Mr. Robotti and ROBT share with Robotti & Company the power to vote or direct the vote, and share the power to dispose or to direct the disposition of 16,022 shares of Common Stock owned by the discretionary customers of Robotti & Company. (4) Each of Mr. Robotti and ROBT share with Robotti Advisors the power to vote or direct the vote, and share the power to dispose or to direct the disposition of 449,476 shares of Common Stock owned by the advisory clients of Robotti Advisors. (5) Suzanne Robotti has the sole power to vote or direct the vote, and has the sole power to dispose or to direct the disposition of 15,069 shares of Common Stock. (6) Mr. Robotti may be deemed to be the beneficial owner of the shares of Common Stock set forth in footnote (5) above, through his marriage to Suzanne Robotti. (7) Each Mr. Robotti and Suzanne Robotti share with Robotti Foundation the power to vote or direct the vote, and share the power to dispose or to direct the disposition of 3,000 shares of the Common Stock owned by Robotti Foundation. (8) Each of Messrs. Robotti and Wasiak and RMC share with RIC the power to vote or direct the vote, and share the power to dispose or to direct the disposition of 385,423 shares of Common Stock owned by RIC.

(c) The table below lists all the transactions in the Issuer's Common Stock in the last sixty days by the Reporting Persons. All such transactions were made by Robotti & Company, Robotti Advisors and RIC in the open market.

Transactions in Shares Within The Past Sixty Days

Party		Date of Purchase/ Sale		Number of Shares of the Common Stock		Buy/Sell		Price Per Share


Robotti and Robotti Foundation		05/12/2005		4,000		BUY		$14.3863
Robotti Advisors' Advisory Clients		05/12/2005		1,650		BUY		$14.8809
Robotti & Company's Discretionary Customers		05/25/2005		100		BUY		$15.84
Robotti & Company's Discretionary Customers		05/26/2005		400		BUY		$13.60

SCHEDULE 13D

CUSIP No. 651587 10 7

Page 13 of 14 Pages

Robotti Advisors' Advisory Clients and RIC

06/02/2005

5,800

BUY

$14.3564

Robotti Advisors' Advisory Clients

06/03/2005

4,980

BUY

$14.4643

RIC

06/03/2005

4,000

BUY

$14.3838

Robotti Advisors' Advisory Clients

06/06/2005

2,800

BUY

$14.3293

RIC

06/06/2005

1,300

BUY

$14.3346

Robotti Advisors' Advisory Clients

06/09/2005

13,300

BUY

$14.1183

RIC

06/09/2005

1,300

BUY

$13.9913

Robotti & Company's Discretionary Customers

06/17/2005

(200)

SELL

$14.70

RIC

06/30/2005

10,400

BUY

$15.0713

RIC

07/01/2005

9,600

BUY

$14.8448

RIC

07/06/2005

10,000

BUY

$15.0329

Robotti Advisors' Advisory Clients

07/19/2005

550

BUY

$16.50

Robotti Advisors' Advisory Clients

07/21/2005

6,200

BUY

$16.9927

Robotti Advisors' Advisory Clients

07/22/2005

1,600

BUY

$17.0663

Robotti Advisors' Advisory Clients

07/25/2005

1,000

BUY

$17.1540

Robotti Advisors' Advisory Clients

08/16/2005

3,050

BUY

$16.2897

Robotti & Company's Discretionary Customers

08/19/2005

628

BUY

$15.80

Robotti & Company's Discretionary Customers

08/23/2005

200

BUY

$16.00

Robotti Advisors' Advisory Clients

08/25/2005

600

BUY

$15.85

(d)

No Person other than the Reporting Persons is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such shares of Common Stock beneficially owned by the Reporting Persons.

(e)

Not Applicable.

SCHEDULE 13D
CUSIP No. 651587 10 7		Page 14 of 14 Pages

SIGNATURE

After reasonable inquiry and to the best of the undersigned's knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.


Date:		August 30, 2005



			Robotti & Company, Incorporated

	/s/ Robert E. Robotti		By:	/s/ Robert E. Robotti

	Robert E. Robotti			Name: Robert E. Robotti
				Title: President and Treasurer


Robotti & Company, LLC			Robotti & Company Advisors, LLC

By:	Robotti & Company, Incorporated		By:	Robotti & Company, Incorporated




By:	/s/ Robert E. Robotti		By:	/s/ Robert E. Robotti

	Name: Robert E. Robotti			Name: Robert E. Robotti
	Title: President and Treasurer			Title: President and Treasurer

			Suzanne and Robert Robotti Foundation, Incorporated

	/s/ Suzanne Robotti		By:	/s/ Robert E. Robotti

	Suzanne Robotti			Name: Robert E. Robotti
				Title: President

	/s/ Kenneth R. Wasiak

	Kenneth R. Wasiak


Ravenswood Management Company, L.L.C.			The Ravenswood Investment Company, L.P.

By:	/s/ Robert E. Robotti		By:	Ravenswood Management Company, L.L.C.

	Name: Robert E. Robotti			Its General Partner
	Title: Managing Member

			By:	/s/ Robert E. Robotti

				Name: Robert E. Robotti
				Title: Managing Member

SIGNATURE