Starboard Value SC 13D/A Integrated Silicon Solution Inc

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

(Rule 13d-101)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO § 240.13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO

§ 240.13d-2(a)

(Amendment No. 2)1

Integrated Silicon Solution, Inc.

(Name of Issuer)

Common Stock, par value $0.0001 per share

(Title of Class of Securities)

45812P107

(CUSIP Number)

JEFFREY C. SMITH

STARBOARD VALUE LP

777 Third Avenue, 18th Floor

New York, New York 10017

(212) 845-7977

STEVE WOLOSKY, ESQ.

OLSHAN FROME WOLOSKY LLP

Park Avenue Tower

65 East 55th Street

New York, New York 10022

(212) 451-2300

(Name, Address and Telephone Number of Person

Authorized to Receive Notices and Communications)

April 10, 2015

(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 §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-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 § 240.13d-7 for other parties to whom copies are to be sent.

_______________

1 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 disclosures provided in a prior cover page.

The information required on 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).

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON STARBOARD VALUE LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 3,074,150
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 3,074,150
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,074,150
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 9.7%
14	TYPE OF REPORTING PERSON PN

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS WC
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION CAYMAN ISLANDS
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 1,848,595
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 1,848,595
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,848,595
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 5.8%
14	TYPE OF REPORTING PERSON CO

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON STARBOARD VALUE AND OPPORTUNITY S LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS WC
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 412,536
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 412,536
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 412,536
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.3%
14	TYPE OF REPORTING PERSON OO

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON STARBOARD VALUE AND OPPORTUNITY C LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS WC
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 225,361
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 225,361
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 225,361
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1%
14	TYPE OF REPORTING PERSON PN

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON STARBOARD VALUE R LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 225,361
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 225,361
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 225,361
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1%
14	TYPE OF REPORTING PERSON PN

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON STARBOARD VALUE R GP LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 225,361
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 225,361
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 225,361
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1%
14	TYPE OF REPORTING PERSON OO

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON STARBOARD VALUE GP LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 3,074,150
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 3,074,150
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,074,150
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 9.7%
14	TYPE OF REPORTING PERSON OO

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON STARBOARD PRINCIPAL CO LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 3,074,150
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 3,074,150
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,074,150
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 9.7%
14	TYPE OF REPORTING PERSON PN

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON STARBOARD PRINCIPAL CO GP LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 3,074,150
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 3,074,150
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,074,150
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 9.7%
14	TYPE OF REPORTING PERSON OO

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON JEFFREY C. SMITH
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION USA
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER - 0 -
	8	SHARED VOTING POWER 3,074,150
	9	SOLE DISPOSITIVE POWER - 0 -
	10	SHARED DISPOSITIVE POWER 3,074,150
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,074,150
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 9.7%
14	TYPE OF REPORTING PERSON IN

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON MARK R. MITCHELL
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION USA
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER - 0 -
	8	SHARED VOTING POWER 3,074,150
	9	SOLE DISPOSITIVE POWER - 0 -
	10	SHARED DISPOSITIVE POWER 3,074,150
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,074,150
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 9.7%
14	TYPE OF REPORTING PERSON IN

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON PETER A. FELD
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION USA
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER - 0 -
	8	SHARED VOTING POWER 3,074,150
	9	SOLE DISPOSITIVE POWER - 0 -
	10	SHARED DISPOSITIVE POWER 3,074,150
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,074,150
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 9.7%
14	TYPE OF REPORTING PERSON IN

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON OLIVER PRESS INVESTORS, LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS WC, OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 68,100
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 68,100
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 68,100
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1%
14	TYPE OF REPORTING PERSON OO

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON AUGUSTUS K. OLIVER II
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION USA
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER - 0 -
	8	SHARED VOTING POWER 68,100
	9	SOLE DISPOSITIVE POWER - 0 -
	10	SHARED DISPOSITIVE POWER 68,100
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 68,100
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1%
14	TYPE OF REPORTING PERSON IN

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON CLIFFORD PRESS
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION USA
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER - 0 -
	8	SHARED VOTING POWER 68,100
	9	SOLE DISPOSITIVE POWER - 0 -
	10	SHARED DISPOSITIVE POWER 68,100
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 68,100
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1%
14	TYPE OF REPORTING PERSON IN

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON MANOJ GUJRAL
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS PF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION USA
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 400
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 400
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 400
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1%
14	TYPE OF REPORTING PERSON IN

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON CATHAL PHELAN
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS PF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION USA, IRELAND
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 1,000
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 1,000
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,000
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1%
14	TYPE OF REPORTING PERSON IN

CUSIP NO. 45812P107

1	NAME OF REPORTING PERSON EDWARD TERINO
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) x (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS PF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)		¨
6	CITIZENSHIP OR PLACE OF ORGANIZATION USA
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 1,000
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 1,000
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,000
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES		o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) Less than 1%
14	TYPE OF REPORTING PERSON IN

CUSIP NO. 45812P107

The following constitutes Amendment No. 2 to the Schedule 13D filed by the undersigned (“Amendment No. 2”). This Amendment No. 2 amends the Schedule 13D as specifically set forth herein.

Item 3.

Source and Amount of Funds or Other Consideration.

Item 3 is hereby amended and restated to read as follows:

The Shares purchased by each of Starboard V&O Fund, Starboard S LLC and Starboard C LP and held in the Starboard Value LP Account were purchased with working capital (which may, at any given time, include margin loans made by brokerage firms in the ordinary course of business) in open market purchases, except as otherwise noted, as set forth in Schedule A, which is incorporated by reference herein. The aggregate purchase price of the 1,848,595 Shares beneficially owned by Starboard V&O Fund is approximately $27,562,162, excluding brokerage commissions. The aggregate purchase price of the 412,536 Shares beneficially owned by Starboard S LLC is approximately $6,134,949, excluding brokerage commissions. The aggregate purchase price of the 225,361 Shares beneficially owned by Starboard C LP is approximately $3,352,862, excluding brokerage commissions. The aggregate purchase price of the 587,658 Shares held in the Starboard Value LP Account is approximately $8,696,687, excluding brokerage commissions.

The Shares purchased by Oliver Press Investors were purchased with working capital (which may, at any given time, include margin loans made by brokerage firms in the ordinary course of business) in open market purchases, except as otherwise noted, as set forth in Schedule A, which is incorporated by reference herein. The aggregate purchase price of the 68,100 Shares beneficially owned by Oliver Press Investors is approximately $901,257, excluding brokerage commissions.

The Shares purchased by each of Messrs. Gujral, Phelan and Terino were purchased in the open market with personal funds. The aggregate purchase price of the 400 Shares owned directly by Mr. Gujral is approximately $6,612, excluding brokerage commissions. The aggregate purchase price of the 1,000 Shares owned directly by Mr. Phelan is approximately $14,488, excluding brokerage commissions. The aggregate purchase price of the 1,000 Shares owned directly by Mr. Terino is approximately $14,639, excluding brokerage commissions.

Item 5.

Interest in Securities of the Issuer.

Items 5(a)-(c) are hereby amended and restated to read as follows:

The aggregate percentage of Shares reported owned by each person named herein is based upon 31,740,189 Shares outstanding, as of March 31, 2015, which is the total number of Shares outstanding as reported in the Issuer’s Preliminary Proxy Statement on Form PREM14A filed with the Securities and Exchange Commission on April 6, 2015.

A.	Starboard V&O Fund

(a)

As of the close of business on April 14, 2015, Starboard V&O Fund beneficially owned 1,848,595 Shares.

Percentage: Approximately 5.8%

CUSIP NO. 45812P107

(b)

1. Sole power to vote or direct vote: 1,848,595

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 1,848,595

4. Shared power to dispose or direct the disposition: 0

(c)

The transactions in the Shares by Starboard V&O Fund during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

B.	Starboard S LLC

(a)

As of the close of business on April 14, 2015, Starboard S LLC beneficially owned 412,536 Shares.

Percentage: Approximately 1.3%

(b)

1. Sole power to vote or direct vote: 412,536

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 412,536

4. Shared power to dispose or direct the disposition: 0

(c)

The transactions in the Shares by Starboard S LLC during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

C.	Starboard C LP

(a)

As of the close of business on April 14, 2015, Starboard C LP beneficially owned 225,361 Shares.

Percentage: Less than 1%

(b)

1. Sole power to vote or direct vote: 225,361

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 225,361

4. Shared power to dispose or direct the disposition: 0

(c)

The transactions in the Shares by Starboard C LP during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

D.	Starboard R LP

(a)

Starboard R LP, as the general partner of Starboard C LP, may be deemed the beneficial owner of the 225,361 shares owned by Starboard C LP.

Percentage: Less than 1%

(b)

1. Sole power to vote or direct vote: 225,361

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 225,361

4. Shared power to dispose or direct the disposition: 0

CUSIP NO. 45812P107

(c)

Starboard R LP has not entered into any transactions in the Shares during the past sixty days. The transactions in the Shares on behalf of Starboard C LP during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

E.	Starboard R GP

(a)

Starboard R GP, as the general partner of Starboard R LP, may be deemed the beneficial owner of the 225,361 shares owned by Starboard C LP.

Percentage: Less than 1%

(b)

1. Sole power to vote or direct vote: 225,361

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 225,361

4. Shared power to dispose or direct the disposition: 0

(c)

Starboard R GP has not entered into any transactions in the Shares during the past sixty days. The transactions in the Shares on behalf of Starboard C LP during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

F.	Starboard Value LP

(a)

As of the close of business on April 14, 2015, 587,658 Shares were held in the Starboard Value LP Account. Starboard Value LP, as the investment manager of Starboard V&O Fund, Starboard C LP and the Starboard Value LP Account and the manager of Starboard S LLC, may be deemed the beneficial owner of the (i) 1,848,595 Shares owned by Starboard V&O Fund, (ii) 412,536 Shares owned by Starboard S LLC, (iii) 225,361 Shares owned by Starboard C LP, and (iv) 587,658 Shares held in the Starboard Value LP Account.

Percentage: Approximately 9.7%

(b)

1. Sole power to vote or direct vote: 3,074,150

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 3,074,150

4. Shared power to dispose or direct the disposition: 0

(c)

The transactions in the Shares by Starboard Value LP through the Starboard Value LP Account and on behalf of each of Starboard V&O Fund, Starboard S LLC and Starboard C LP during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

G.	Starboard Value GP

(a)

Starboard Value GP, as the general partner of Starboard Value LP, may be deemed the beneficial owner of the (i) 1,848,595 Shares owned by Starboard V&O Fund, (ii) 412,536 Shares owned by Starboard S LLC, (iii) 225,361 Shares owned by Starboard C LP, and (iv) 587,658 Shares held in the Starboard Value LP Account.

Percentage: Approximately 9.7%

CUSIP NO. 45812P107

(b)

1. Sole power to vote or direct vote: 3,074,150

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 3,074,150

4. Shared power to dispose or direct the disposition: 0

(c)

Starboard Value GP has not entered into any transactions in the Shares during the past sixty days. The transactions in the Shares on behalf of each of Starboard V&O Fund, Starboard S LLC, Starboard C LP and through the Starboard Value LP Account during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

H.	Principal Co

(a)

Principal Co, as a member of Starboard Value GP, may be deemed the beneficial owner of the (i) 1,848,595 Shares owned by Starboard V&O Fund, (ii) 412,536 Shares owned by Starboard S LLC, (iii) 225,361 Shares owned by Starboard C LP, and (iv) 587,658 Shares held in the Starboard Value LP Account.

Percentage: Approximately 9.7%

(b)

1. Sole power to vote or direct vote: 3,074,150

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 3,074,150

4. Shared power to dispose or direct the disposition: 0

(c)

Principal Co has not entered into any transactions in the Shares during the past sixty days. The transactions in the Shares on behalf of each of Starboard V&O Fund, Starboard S LLC, Starboard C LP and through the Starboard Value LP Account during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

I.	Principal GP

(a)

Principal GP, as the general partner of Principal Co, may be deemed the beneficial owner of the (i) 1,848,595 Shares owned by Starboard V&O Fund, (ii) 412,536 Shares owned by Starboard S LLC, (iii) 225,361 Shares owned by Starboard C LP, and (iv) 587,658 Shares held in the Starboard Value LP Account.

Percentage: Approximately 9.7%

(b)

1. Sole power to vote or direct vote: 3,074,150

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 3,074,150

4. Shared power to dispose or direct the disposition: 0

(c)

Principal GP has not entered into any transactions in the Shares during the past sixty days. The transactions in the Shares on behalf of each of Starboard V&O Fund, Starboard S LLC, Starboard C LP and through the Starboard Value LP Account during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

CUSIP NO. 45812P107

J.	Messrs. Smith, Mitchell and Feld

(a)

Each of Messrs. Smith, Mitchell and Feld, as a member of Principal GP and as a member of each of the Management Committee of Starboard Value GP and the Management Committee of Principal GP, may be deemed the beneficial owner of the (i) 1,848,595 Shares owned by Starboard V&O Fund, (ii) 412,536 Shares owned by Starboard S LLC, (iii) 225,361 Shares owned by Starboard C LP, and (iv) 587,658 Shares held in the Starboard Value LP Account.

Percentage: Approximately 9.7%

(b)

1. Sole power to vote or direct vote: 0

2. Shared power to vote or direct vote: 3,074,150

3. Sole power to dispose or direct the disposition: 0

4. Shared power to dispose or direct the disposition: 3,074,150

(c)

None of Messrs. Smith, Mitchell or Feld has entered into any transactions in the Shares during the past sixty days. The transactions in the Shares on behalf of each of Starboard V&O Fund, Starboard S LLC, Starboard C LP and through the Starboard Value LP Account during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

K. Oliver Press Investors

(a)

As of the close of business on April 14, 2015, Oliver Press Investors beneficially owned 68,100 Shares.

Percentage: Less than 1%

(b)

1. Sole power to vote or direct vote: 68,100

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 68,100

4. Shared power to dispose or direct the disposition: 0

(c)

The transactions in the Shares by Oliver Press Investors during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

L. Messrs. Oliver and Press

(a)

Each of Messrs. Oliver and Press, as a managing member of Oliver Press Investors, may be deemed the beneficial owner of the 68,100 Shares owned by Oliver Press Investors.

Percentage: Less than 1%

(b)

1. Sole power to vote or direct vote: 0

2. Shared power to vote or direct vote: 68,100

3. Sole power to dispose or direct the disposition: 0

4. Shared power to dispose or direct the disposition: 68,100

CUSIP NO. 45812P107

(c)

None of Messrs. Oliver or Press has entered into any transactions in the Shares during the past sixty days. The transactions in the Shares on behalf of Oliver Press Investors during the past sixty days are set forth in Schedule A and are incorporated herein by reference.

M. Mr. Gujral

(a)

As of the close of business on April 14, 2015, Mr. Gujral directly owned 400 Shares.

Percentage: Less than 1%

(b)

1. Sole power to vote or direct vote: 400

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 400

4. Shared power to dispose or direct the disposition: 0

(c)

Mr. Gujral has not entered into any transactions in the Shares during the past sixty days.

N. Mr. Phelan

(a)

As of the close of business on April 14, 2015, Mr. Phelan directly owned 1,000 Shares.

Percentage: Less than 1%

(b)

1. Sole power to vote or direct vote: 1,000

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 1,000

4. Shared power to dispose or direct the disposition: 0

(c)

Mr. Phelan has not entered into any transactions in the Shares during the past sixty days.

O. Mr. Terino

(a)

As of the close of business on April 14, 2015, Mr. Terino directly owned 1,000 Shares.

Percentage: Less than 1%

(b)

1. Sole power to vote or direct vote: 1,000

2. Shared power to vote or direct vote: 0

3. Sole power to dispose or direct the disposition: 1,000

4. Shared power to dispose or direct the disposition: 0

(c)

Mr. Terino has not entered into any transactions in the Shares during the past sixty days.

As of the close of business on April 14, 2015, the Reporting Persons collectively beneficially owned an aggregate of 3,144,650 Shares, constituting approximately 9.9% of the Shares outstanding.

Each Reporting Person, as a member of a “group” with the other Reporting Persons for the purposes of Section 13(d)(3) of the Securities Exchange Act of 1934, as amended, may be deemed the beneficial owner of the Shares directly owned by the other Reporting Persons. Each Reporting Person disclaims beneficial ownership of such Shares except to the extent of his or its pecuniary interest therein.

CUSIP NO. 45812P107

SIGNATURES

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

Dated: April 14, 2015

STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD

By: Starboard Value LP,

its investment manager

STARBOARD VALUE AND OPPORTUNITY S LLC

By: Starboard Value LP,

its manager

STARBOARD VALUE AND OPPORTUNITY C LP

By: Starboard Value R LP

its general partner

STARBOARD VALUE R LP

By: Starboard Value R GP LLC,

its general partner

STARBOARD VALUE LP

By: Starboard Value GP LLC,

its general partner

STARBOARD VALUE GP LLC

By: Starboard Principal Co LP,

its member

STARBOARD PRINCIPAL CO LP

By: Starboard Principal Co GP LLC,

its general partner

STARBOARD PRINCIPAL CO GP LLC

STARBOARD VALUE R GP LLC



By:	/s/ Jeffrey C. Smith
	Name:	Jeffrey C. Smith
	Title:	Authorized Signatory

/s/ Jeffrey C. Smith

JEFFREY C. SMITH

Individually and as attorney-in-fact for Mark R. Mitchell, Peter A. Feld, Manoj Gujral, Cathal Phelan, and Edward Terino

Oliver Press Investors, LLC

By:	/s/ Clifford Press
	Name:	Clifford Press
	Title:	Managing Member

CUSIP NO. 45812P107

/s/ Augustus K. Oliver II

AUGUSTUS K. OLIVER II

/s/ Clifford Press

CLIFFORD PRESS

CUSIP NO. 45812P107

SCHEDULE A

Transactions in the Shares During the Past Sixty Days

Shares of Common Stock

Purchased/(Sold)

Price Per

Share($)

Date of

Purchase / Sale

STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD

123,800	18.6993	03/12/2015
92,850	18.7029	03/12/2015
15,475	18.4995	03/13/2015
104,041	18.0935	04/10/2015
82,859	18.2065	04/10/2015

STARBOARD VALUE AND OPPORTUNITY S LLC

26,600	18.6993	03/12/2015
19,950	18.7029	03/12/2015
3,325	18.4995	03/13/2015
21,877	18.0935	04/10/2015
17,423	18.2065	04/10/2015

STARBOARD VALUE AND OPPORTUNITY C LP

14,600	18.6993	03/12/2015
10,950	18.7029	03/12/2015
1,825	18.4995	03/13/2015
12,024	18.0935	04/10/2015
9,576	18.2065	04/10/2015

STARBOARD VALUE LP

(Through the Starboard Value LP Account)

35,000	18.6993	03/12/2015
26,250	18.7029	03/12/2015
4,375	18.4995	03/13/2015
29,058	18.0935	04/10/2015
23,142	18.2065	04/10/2015

OLIVER PRESS INVESTORS, LLC

3,400	18.5900	03/12/2015
5,100	17.9614	03/27/2015

Starboard Value SC 13D/AIntegrated Silicon Solution Inc