UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G/A

Under the Securities Exchange Act of 1934

(Rule 13d-102)

Information to be Included in Statements Filed

Pursuant to Rule 13d-1(b)(c), and (d) and Amendments thereto

Filed Pursuant to Rule 13d-2(b)

(Amendment No.3)*

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

¨ Rule 13d-1(b)

¨ Rule 13d-1(c)

x Rule 13d-1(d)

* 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).

Item 1.

Warner Chilcott Public Limited Company.

Unit 19 Ardee Business Park

Hale Street

Ardee, Co. Louth,

Ireland

Item 2.

J.P. Morgan Partners (BHCA), L.P. (“JPMP (BHCA)”)

J.P. Morgan Partners Global Investors, L.P. (“JPMP Global”)

J.P. Morgan Partners Global Investors A, L.P. (“JPMP Global A”)

J.P. Morgan Partners Global Investors (Cayman), L.P. (“JPMP Cayman”)

J.P. Morgan Partners Global Investors (Cayman) II, L.P. (“JPMP Cayman II”)

J.P. Morgan Partners Global Investors (Cayman) III, L.P. (“JPMP Cayman III”)

J.P. Morgan Partners Global Investors (Selldown), LP (“JPMP Selldown”)

J.P. Morgan Partners Global Investors (Selldown) II-A, L.P (“JPMP Selldown II-A”)

J.P. Morgan Partners Global Investors (Cayman/Selldown) III, L.P. (“JPMP Selldown III”)

Supplemental information relating to the ownership and control of the persons filing this statement is included in Exhibit 2(a) attached hereto.

c/o J.P. Morgan Partners, LLC

270 Park Avenue

New York, New York 10017

See also supplemental information relating to principal business office included in Exhibit 2(a) attached hereto.

Citizenship:

Ordinary Shares, $0.01 per share

G 94368 10 0

Item 3.   If this statement is filed pursuant to §§ 240. 13d-1(b) or 240. 13d-2(b) or (c), check whether the person filing is a:

Not applicable.

Item 4.   Ownership

Not applicable.

Not applicable.

Item 5.   Ownership of Five Percent or Less of a Class

Not applicable.

Item 6.   Ownership of More than Five Percent on Behalf of Another Person

Not applicable.

Item 7.   Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person

Not applicable.

Item 8.   Identification and Classification of Members of the Group

Not applicable.

Item 9.   Notice of Dissolution of Group

Not applicable.

Item 10. Certification

Not applicable

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Date: February 14, 2013

Issuer: Warner Chilcott plc

EXHIBIT 2(a)

This statement is being filed by J.P. Morgan Partners (BHCA), L.P., a Delaware limited partnership (hereinafter referred to as “JPMP (BHCA)”), whose principal business office is located 270 Park Avenue, New York, New York 10017. JPMP (BHCA) is engaged in the venture capital, private equity and leveraged buyout business. The general partner of JPMP (BHCA) is JPMP Master Fund Manager, L.P., a Delaware limited partnership (hereinafter referred to as “JPMP Master Fund”), whose principal business office is located at the same address as JPMP (BHCA), and is also engaged directly and indirectly (through affiliates) in the venture capital, private equity and leveraged buyout business. As general partner of JPMP (BHCA), JPMP Master Fund may be deemed to beneficially own the shares held by JPMP (BHCA).

This statement is also being filed by J.P. Morgan Partners Global Investors, L.P., a Delaware limited partnership (“JPMP Global”), whose principal place of business is located at the same address as JPMP (BHCA); J.P. Morgan Partners Global Investors A, L.P., a Delaware limited partnership (“JPMP Global A”), whose principal place of business is located at the same address as JPMP (BHCA); J.P. Morgan Partners Global Investors (Cayman), L.P., a limited partnership organized under the laws of the Cayman Islands (“JPMP Cayman”), whose principal place of business is located at the same address as JPMP (BHCA); J.P. Morgan Partners Global Investors (Cayman) II, L.P., a limited partnership organized under the laws of the Cayman Islands (“JPMP Cayman II”), whose principal place of business is located at the same address as JPMP (BHCA), J.P. Morgan Partners Global Investors (Cayman) III, L.P., a limited partnership organized under the laws of the Cayman Islands (“JPMP Cayman III”), whose principal place of business is located at the same address as JPMP (BHCA), J.P. Morgan Partners Global Investors (Selldown), L.P., a Delaware limited partnership, whose principal place of business is located at the same address as JPMP (BHCA), J.P. Morgan Partners Global Investors (Selldown) II-A, L.P., a limited partnership organized under the laws of Cayman Islands (“JPMP Selldown II-A), whose principal place of business is located at the same address as JPMP (BHCA), and J.P. Morgan Partners Global Investors (Cayman/Selldown), III, L.P. (“JPMP Selldown III” and collectively with JPMP Global, JPMP Global A, JPMP Cayman, JPMP Cayman II, JPMP Cayman III, JPMP Selldown and JPMP Selldown II-A, the “Global Fund Entities”), a limited partnership organized under the laws of the Cayman Islands, whose principal place of business is located at the same address as JPMP (BHCA). Each of the Global Fund Entities is also engaged in the venture capital, private equity and leveraged buyout business. The general partner of each of the Global Fund Entities is JPMP Global Investors, L.P., a Delaware limited partnership (“JPMP Investors”), whose principal place of business is located at the same address as JPMP (BHCA). JPMP Investors is engaged indirectly in the venture capital, private equity and leveraged buyout business as general partner of each of the Global Fund Entities. As general partner of each of the Global Fund Entities, JPMP Investors may be deemed to beneficially own the shares held by the Global Fund Entities.

The general partner of each of JPMP Master Fund and JPMP Investors is JPMP Capital Corp., a New York corporation (hereinafter referred to as “JPMP Capital Corp.”), whose principal business office is located at the same address as JPMP (BHCA), and is also engaged directly and indirectly (through affiliates) in the venture capital, private equity and leveraged buyout business. Set forth in Schedule A hereto and incorporated herein by reference are the names, business addresses, principal occupations and employments of each executive officer and director of JPMP Capital Corp. As the general partner of each of JPMP Master Fund and JPMP Investors, JPMP Capital Corp. may be deemed to beneficially own the shares held by JPMP (BHCA) and the Global Fund Entities.

JPMP Capital Corp. is a wholly owned subsidiary of JPMorgan Chase & Co., a Delaware corporation (hereinafter referred to as “JPMorgan Chase”) which is engaged (primarily through subsidiaries) in the commercial banking business with its principal office located at 270 Park Avenue, New York, New York 10017. Set forth in Schedule B hereto and incorporated herein by reference are the names, business addresses, principal occupations and employments of each executive officer and director of JP Morgan Chase.

EXHIBIT 2(b)

JOINT FILING AGREEMENT

The undersigned acknowledge and agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13G shall be filed on behalf of each of the undersigned without the necessity of filing additional joint acquisition statements. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning him or it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the other, except to the extent that he or it knows or has reason to believe that such information is accurate.

Dated this 14^th day of February, 2013.

Issuer: Warner Chilcott plc

SCHEDULE A

JPMP CAPITAL CORP.

Executive Officers (1)

Directors (1)

Ana Capella Gomez-Acebo*

Norma C. Corio*

(1) Each of whom is a United States citizen, except Ana Capella Gomez-Acebo, who is a citizen of Spain

* Principal occupation is employee and/or officer of JPMorgan Chase & Co. Business address is c/o JPMorgan Chase & Co., 270 Park Avenue, New York, NY 10017

SCHEDULE 13G

Issuer: Warner Chilcott plc

SCHEDULE B

JPMORGAN CHASE & CO.

Executive Officers(1)

(1)   Each of whom is a United States citizen.

* Principal occupation is employee or officer of JPMorgan Chase & Co.

      Business address is c/o JPMorgan Chase & Co., 270 Park Avenue, New York,

      New York 10017.

SCHEDULE 13G

Issuer: Warner Chilcott plc

Directors (1)