UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No.     )*

CATALENT, INC.

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

148806102

(CUSIP Number)

December 31, 2014

(Date of Event which Requires Filing of this Statement)

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 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. 148806102 13G Page 2 of 22

1.	Name of Reporting Persons: Blackstone Healthcare Partners L.L.C.
2.	Check the Appropriate Box if a Member of a Group (a)  ¨         (b)  x
3.	SEC Use Only
4.	Citizenship or Place of Organization: Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5.	Sole Voting Power: 64,536,152
		6.	Shared Voting Power: 0
		7.	Sole Dispositive Power: 64,536,152
		8.	Shared Dispositive Power: 0
9.	Aggregate Amount Beneficially Owned by Each Reporting Person: 64,536,152
10.	Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ¨
11.	Percent of Class Represented by Amount in Row (9): 52.1%
12.	Type of Reporting Person (See Instructions): OO

CUSIP No. 148806102 13G Page 3 of 22

1.	Name of Reporting Persons: Blackstone Capital Partners V L.P.
2.	Check the Appropriate Box if a Member of a Group (a)  ¨         (b)  x
3.	SEC Use Only
4.	Citizenship or Place of Organization: Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5.	Sole Voting Power: 64,536,152
		6.	Shared Voting Power: 0
		7.	Sole Dispositive Power: 64,536,152
		8.	Shared Dispositive Power: 0
9.	Aggregate Amount Beneficially Owned by Each Reporting Person: 64,536,152
10.	Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ¨
11.	Percent of Class Represented by Amount in Row (9): 52.1%
12.	Type of Reporting Person (See Instructions): PN

CUSIP No. 148806102 13G Page 4 of 22

1.	Name of Reporting Persons: Blackstone Management Associates V L.L.C.
2.	Check the Appropriate Box if a Member of a Group (a)  ¨         (b)  x
3.	SEC Use Only
4.	Citizenship or Place of Organization: Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5.	Sole Voting Power: 64,536,152
		6.	Shared Voting Power: 0
		7.	Sole Dispositive Power: 64,536,152
		8.	Shared Dispositive Power: 0
9.	Aggregate Amount Beneficially Owned by Each Reporting Person: 64,536,152
10.	Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ¨
11.	Percent of Class Represented by Amount in Row (9): 52.1%
12.	Type of Reporting Person (See Instructions): OO

CUSIP No. 148806102 13G Page 5 of 22

1.	Name of Reporting Persons: BMA V L.L.C.
2.	Check the Appropriate Box if a Member of a Group (a)  ¨         (b)  x
3.	SEC Use Only
4.	Citizenship or Place of Organization: Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5.	Sole Voting Power: 64,536,152
		6.	Shared Voting Power: 0
		7.	Sole Dispositive Power: 64,536,152
		8.	Shared Dispositive Power: 0
9.	Aggregate Amount Beneficially Owned by Each Reporting Person: 64,536,152
10.	Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ¨
11.	Percent of Class Represented by Amount in Row (9): 52.1%
12.	Type of Reporting Person (See Instructions): OO

CUSIP No. 148806102 13G Page 6 of 22

1.	Name of Reporting Persons: Blackstone Holdings III L.P.
2.	Check the Appropriate Box if a Member of a Group (a)  ¨         (b)  x
3.	SEC Use Only
4.	Citizenship or Place of Organization: Quebec, Canada
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5.	Sole Voting Power: 64,536,152
		6.	Shared Voting Power: 0
		7.	Sole Dispositive Power: 64,536,152
		8.	Shared Dispositive Power: 0
9.	Aggregate Amount Beneficially Owned by Each Reporting Person: 64,536,152
10.	Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ¨
11.	Percent of Class Represented by Amount in Row (9): 52.1%
12.	Type of Reporting Person (See Instructions): PN

CUSIP No. 148806102 13G Page 7 of 22

1.	Name of Reporting Persons: Blackstone Holdings III GP L.P.
2.	Check the Appropriate Box if a Member of a Group (a)  ¨         (b)  x
3.	SEC Use Only
4.	Citizenship or Place of Organization: Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5.	Sole Voting Power: 64,536,152
		6.	Shared Voting Power: 0
		7.	Sole Dispositive Power: 64,536,152
		8.	Shared Dispositive Power: 0
9.	Aggregate Amount Beneficially Owned by Each Reporting Person: 64,536,152
10.	Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ¨
11.	Percent of Class Represented by Amount in Row (9): 52.1%
12.	Type of Reporting Person (See Instructions): PN

CUSIP No. 148806102 13G Page 8 of 22

1.	Name of Reporting Persons: Blackstone Holdings III GP Management L.L.C.
2.	Check the Appropriate Box if a Member of a Group (a)  ¨         (b)  x
3.	SEC Use Only
4.	Citizenship or Place of Organization: Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5.	Sole Voting Power: 64,536,152
		6.	Shared Voting Power: 0
		7.	Sole Dispositive Power: 64,536,152
		8.	Shared Dispositive Power: 0
9.	Aggregate Amount Beneficially Owned by Each Reporting Person: 64,536,152
10.	Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ¨
11.	Percent of Class Represented by Amount in Row (9): 52.1%
12.	Type of Reporting Person (See Instructions): OO

CUSIP No. 148806102 13G Page 9 of 22

1.	Name of Reporting Persons: The Blackstone Group L.P.
2.	Check the Appropriate Box if a Member of a Group (a)  ¨         (b)  x
3.	SEC Use Only
4.	Citizenship or Place of Organization: Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5.	Sole Voting Power: 64,536,152
		6.	Shared Voting Power: 0
		7.	Sole Dispositive Power: 64,536,152
		8.	Shared Dispositive Power: 0
9.	Aggregate Amount Beneficially Owned by Each Reporting Person: 64,536,152
10.	Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ¨
11.	Percent of Class Represented by Amount in Row (9): 52.1%
12.	Type of Reporting Person (See Instructions): PN

CUSIP No. 148806102 13G Page 10 of 22

1.	Name of Reporting Persons: Blackstone Group Management L.L.C.
2.	Check the Appropriate Box if a Member of a Group (a)  ¨         (b)  x
3.	SEC Use Only
4.	Citizenship or Place of Organization: Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5.	Sole Voting Power: 64,536,152
		6.	Shared Voting Power: 0
		7.	Sole Dispositive Power: 64,536,152
		8.	Shared Dispositive Power: 0
9.	Aggregate Amount Beneficially Owned by Each Reporting Person: 64,536,152
10.	Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ¨
11.	Percent of Class Represented by Amount in Row (9): 52.1%
12.	Type of Reporting Person (See Instructions): OO

CUSIP No. 148806102 13G Page 11 of 22

1.	Name of Reporting Persons: Stephen A. Schwarzman
2.	Check the Appropriate Box if a Member of a Group (a)  ¨         (b)  x
3.	SEC Use Only
4.	Citizenship or Place of Organization: United States
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5.	Sole Voting Power: 64,536,152
		6.	Shared Voting Power: 0
		7.	Sole Dispositive Power: 64,536,152
		8.	Shared Dispositive Power: 0
9.	Aggregate Amount Beneficially Owned by Each Reporting Person: 64,536,152
10.	Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) ¨
11.	Percent of Class Represented by Amount in Row (9): 52.1%
12.	Type of Reporting Person (See Instructions): IN

Item 1. (a). Name of Issuer

Catalent, Inc. (the “Issuer”)

(b). Address of Issuer’s Principal Executive Offices:

14 Schoolhouse Road

Somerset, NJ 08873

Item 2(a). Name of Person Filing

Item 2(b). Address of Principal Business Office

Item 2(c). Citizenship

Each of the following is hereinafter individually referred to as a “Reporting Person” and collectively as the “Reporting Persons.” This statement is filed on behalf of:

(i) Blackstone Healthcare Partners L.L.C.

c/o The Blackstone Group L.P.

345 Park Avenue

New York, NY 10154

Citizenship: State of Delaware

(ii) Blackstone Capital Partners V L.P.

c/o The Blackstone Group L.P.

345 Park Avenue

New York, NY 10154

Citizenship: State of Delaware

(iii) Blackstone Management Associates V L.L.C.

c/o The Blackstone Group L.P.

345 Park Avenue

New York, NY 10154

Citizenship: State of Delaware

(iv) BMA V L.L.C.

c/o The Blackstone Group L.P.

345 Park Avenue

New York, NY 10154

Citizenship: State of Delaware

Page 12

(v) Blackstone Holdings III L.P.

c/o The Blackstone Group L.P.

345 Park Avenue

New York, NY 10154

Citizenship: Quebec, Canada

(vi) Blackstone Holdings III GP L.P.

c/o The Blackstone Group L.P.

345 Park Avenue

New York, NY 10154

Citizenship: State of Delaware

(vii) Blackstone Holdings III GP Management L.L.C.

c/o The Blackstone Group L.P.

345 Park Avenue

New York, NY 10154

Citizenship: State of Delaware

(viii) The Blackstone Group L.P.

345 Park Avenue

New York, NY 10154

Citizenship: State of Delaware

(ix) Blackstone Group Management L.L.C.

c/o The Blackstone Group L.P.

345 Park Avenue

New York, NY 10154

Citizenship: State of Delaware

(x) Stephen A. Schwarzman

c/o The Blackstone Group L.P.

345 Park Avenue

New York, NY 10154

Citizenship: United States

Blackstone Healthcare Partners L.L.C. directly holds 64,536,152 shares of Common Stock. The managing member of Blackstone Healthcare Partners L.L.C. is Blackstone Capital Partners V L.P. The general partner of Blackstone Capital Partners V L.P. is Blackstone Management Associates V L.L.C. BMA V L.L.C. is the sole member of Blackstone Management Associates V L.L.C. Blackstone Holdings III L.P. is the managing member and majority in interest owner of BMA V L.L.C. The general partner of Blackstone Holdings III L.P. is Blackstone Holdings III GP L.P. The general partner of Blackstone Holdings III GP L.P. is Blackstone Holdings III GP Management L.L.C. The sole member of Blackstone Holdings III GP Management L.L.C. is The Blackstone Group L.P. The general partner of The Blackstone Group L.P. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone’s senior managing directors and controlled by its founder, Stephen A. Schwarzman.

Page 13

Each such Reporting Person may be deemed to beneficially own the Common Stock beneficially owned by Blackstone Healthcare Partners L.L.C., but neither the filing of this Schedule 13G nor any of its contents shall be deemed to constitute an admission that any Reporting Person (other than Blackstone Healthcare Partners L.L.C.) is the beneficial owner of Common Stock referred to herein for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, or for any other purpose and each of the Reporting Persons expressly disclaims beneficial ownership of such shares of Common Stock. The filing of this statement should not be construed to be an admission that any member of the Reporting Persons are members of a “group” for the purposes of Sections 13(d) and 13(g) of the Act.

Item 2(d). Title of Class of Securities:

Common Stock, par value $0.01 per share (the “Common Stock”).

Item 2(e). CUSIP Number:

148806102

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

Not applicable.

Item 4. Ownership.

(a) Amount beneficially owned:

Calculations of the percentage of shares of Common Stock beneficially owned assume 123,813,614 shares of Common Stock outstanding as of November 3, 2014 as reported in the Quarterly Report on Form 10-Q of the Issuer for the period ended September 30, 2014, as filed with the Securities and Exchange Commission on November 14, 2014. As of the date hereof, each of the Reporting Persons may be deemed to be the beneficial owner of the shares of Common Stock listed on such Reporting Person’s cover page. Blackstone Healthcare Partners L.L.C. directly holds 64,536,152 shares of Common Stock.

(b) Percent of class:

As of the date hereof, each of the Reporting Persons may be deemed to be the beneficial owner of the percentage of shares of Common Stock listed on such Reporting Person’s cover page.

(c) Number of Shares as to which the Reporting Person has:

(i) Sole power to vote or to direct the vote:

See each cover page hereof.

(ii) Shared power to vote or to direct the vote:

See each cover page hereof.

Page 14

(iii) Sole power to dispose or to direct the disposition of:

See each cover page hereof.

(iv) Shared power to dispose or to direct the disposition of:

See each cover page hereof.

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

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following: ¨

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.

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.

Page 15

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.

Dated: February 17, 2015

BLACKSTONE HEALTHCARE PARTNERS L.L.C. By: Blackstone Capital Partners V L.P., its managing member By: Blackstone Management Associates V L.L.C., its general partner By: BMA V L.L.C., its sole member
By:	/s/ John G. Finley
Name:	John G. Finley
Title:	Chief Legal Officer

BLACKSTONE CAPITAL PARTNERS V L.P. By: Blackstone Management Associates V L.L.C., its general partner By: BMA V L.L.C., its sole member
By:	/s/ John G. Finley
Name: Title:	John G. Finley Chief Legal Officer
BLACKSTONE MANAGEMENT ASSOCIATES V L.L.C. By: BMA V L.L.C., its sole member
By:	/s/ John G. Finley
Name:	John G. Finley
Title:	Chief Legal Officer

[Catalent, Inc. - Schedule 13G]

BMA V L.L.C.
By:	/s/ John G. Finley
Name: Title:	John G. Finley Chief Legal Officer

BLACKSTONE HOLDINGS III L.P. By: Blackstone Holdings III GP L.P., its general partner By: Blackstone Holdings III GP Management L.L.C., its general partner
By:	/s/ John G. Finley
Name: Title:	John G. Finley Chief Legal Officer
BLACKSTONE HOLDINGS III GP L.P. By: Blackstone Holdings III GP Management L.L.C., its general partner
By:	/s/ John G. Finley
Name: Title:	John G. Finley Chief Legal Officer
BLACKSTONE HOLDINGS III GP MANAGEMENT L.L.C.
By:	/s/ John G. Finley
Name:	John G. Finley
Title:	Chief Legal Officer

THE BLACKSTONE GROUP L.P. By: Blackstone Group Management L.L.C., its general partner
By:	/s/ John G. Finley
Name:	John G. Finley
Title:	Chief Legal Officer
BLACKSTONE GROUP MANAGEMENT L.L.C.
By:	/s/ John G. Finley
Name:	John G. Finley
Title:	Chief Legal Officer

[Catalent, Inc. - Schedule 13G]

STEPHEN A. SCHWARZMAN
/s/ Stephen A. Schwarzman
Name:	Stephen A. Schwarzman

[Catalent, Inc. - Schedule 13G]

EXHIBIT LIST

Exhibit A Joint Filing Agreement, dated February 17, 2015, among the Reporting Persons (filed herewith).

[Catalent, Inc. - Schedule 13G]