SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* HARVEY KEVIN (Last) (First) (Middle) 2480 SAND HILL ROAD, SUITE 200 (Street) MENLO PARK CA 94025 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol PROOFPOINT INC [ PFPT ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 04/25/2012
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	04/25/2012		C		4,260,650(1)	A	(1)	4,260,650(1)	I	See footnote 3(2)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Series A Preferred Stock	(1)	04/25/2012		C			3,400,000	(1)	(3)	Common Stock	1,700,000(1)	$0	0	I	See footnote 3(2)
Series B Preferred Stock	(1)	04/25/2012		C			1,794,764	(1)	(3)	Common Stock	897,382(1)	$0	0	I	See footnote 3(2)
Series C Preferred Stock	(1)	04/25/2012		C			1,308,234	(1)	(3)	Common Stock	654,117(1)	$0	0	I	See footnote 3(2)
Series E Preferred Stock	(1)	04/25/2012		C			1,040,480	(1)	(3)	Common Stock	522,648.7112(1)	$0	0	I	See footnote 3(2)
Series F Preferred Stock	(1)	04/25/2012		C			973,006	(1)	(3)	Common Stock	486,503(1)	$0	0	I	See footnote 3(2)

Explanation of Responses:

1. In connection with the closing of the Issuer's initial public offering on April 25, 2012, each share of Series A, Series B, Series C and Series F Preferred Stock automatically converted into 0.5 shares of Issuer's Common Stock, and each share of Series E Preferred Stock automatically converted into 0.502315 shares of Issuer's Common Stock, for no additional consideration, reflecting an adjustment following a 1-for-2 reverse stock split effected by the Issuer on April 2, 2012. All shares of Common Stock (including fractions thereof) issued upon conversion were aggregated. No fractional share was issued upon the conversion of any share or shares of Preferred Stock.

2. Shares held of record by Benchmark Capital Partners IV, L.P. ("BCP IV"), as nominee for BCP IV, Benchmark Founders' Fund IV, L.P. ("BFF IV"), Benchmark Founders' Fund IV-A, L.P. ("BFF IV-A"), Benchmark Founders' Fund IV-B, L.P. ("BFF IV-B") and related persons. Benchmark Capital Management Co. IV, L.L.C. ("BCMC IV"), the general partner of each of BCP IV, BFF IV, BFF IV-A and BFF IV-B, may be deemed to have sole voting and investment power over the reported shares of the Issuer's stock held by such funds.

3. None.

Remarks:

Alexandre Balkanski, Bruce Dunlevie, J. William Gurley, Kevin R. Harvey, Robert Kagle and Steven M. Spurlock are the managing members of Benchmark Capital Management Co. IV, L.L.C., which serves as general partner to Benchmark Capital Partners IV, L.P., Benchmark Founders' Fund IV, Benchmark Founders' Fund IV-A, L.P. and Benchmark Founders' Fund IV-B, L.P., and may be deemed to share voting and investment power over the shares beneficially held by such entities. Each such person disclaims the existence of a "group" and disclaims beneficial ownership of any securities (except to the extent of such person's pecuniary interest in such securities) other than any securities being reported herein as being directly owned by such person. *This report is one of two reports, each on a separate Form 4, but relating to the same transaction being filed by entities affiliated with Benchmark Capital and their applicable members.*

	/s/ Steven M. Spurlock, by power of attorney for Kevin R. Harvey	04/25/2012
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (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).
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