UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G/A

o

Rule 13d-1(b)

o

Rule 13d-1(c)

x

Rule 13d-1(d)

CUSIP No. 451734107

1.

Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only)
URPASIS INVESTMENTS LIMITED

2.

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

(a)

o

(b)

o

NOT APPLICABLE

3.

SEC Use Only

4.

Citizenship or Place of Organization
CYPRUS

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
-0-

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
-0-

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
-0- (See Item 5.)

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
0%

12.

Type of Reporting Person (See Instructions)
CO

CUSIP No. 451734107

1.

Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only)
URVANOS INVESTMENTS LIMITED

2.

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

(a)

o

(b)

o

NOT APPLICABLE

3.

SEC Use Only

4.

Citizenship or Place of Organization
CYPRUS

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
14,708,859

6.

Shared Voting Power
-0-

7.

Sole Dispositive Power
14,708,859

8.

Shared Dispositive Power
-0-

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
14,708,859

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
25.0%

12.

Type of Reporting Person (See Instructions)
CO

CUSIP No. 451734107

1.

Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only)
TBG HOLDINGS NV

2.

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

(a)

o

(b)

o

NOT APPLICABLE

3.

SEC Use Only

4.

Citizenship or Place of Organization
NETHERLANDS ANTILLES

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
23,960,250

6.

Shared Voting Power
-0-

7.

Sole Dispositive Power
23,960,250

8.

Shared Dispositive Power
-0-

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
23,960,250

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
40.7%

12.

Type of Reporting Person (See Instructions)
CO

CUSIP No. 451734107

1.

Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only)
THYSSEN BORNEMISZA CONTINUITY TRUST

2.

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

(a)

o

(b)

o

NOT APPLICABLE

3.

SEC Use Only

4.

Citizenship or Place of Organization
BERMUDA

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
23,960,250

6.

Shared Voting Power
-0-

7.

Sole Dispositive Power
23,960,250

8.

Shared Dispositive Power
-0-

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
23,960,250

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
40.7%

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 451734107

1.

Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only)
THYBO TRUSTEES LIMITED

2.

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

(a)

o

(b)

o

NOT APPLICABLE

3.

SEC Use Only

4.

Citizenship or Place of Organization
BERMUDA

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
23,960,250

6.

Shared Voting Power
-0-

7.

Sole Dispositive Power
23,960,250

8.

Shared Dispositive Power
-0-

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
23,960,250

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
40.7%

12.

Type of Reporting Person (See Instructions)
CO

CUSIP No. 451734107

1.

Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only)
TORNABUONI LIMITED

2.

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

(a)

o

(b)

o

NOT APPLICABLE

3.

SEC Use Only

4.

Citizenship or Place of Organization
GUERNSEY

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
23,960,250

6.

Shared Voting Power
-0-

7.

Sole Dispositive Power
23,960,250

8.

Shared Dispositive Power
-0-

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
23,960,250

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
40.7%

12.

Type of Reporting Person (See Instructions)
CO

CUSIP No. 451734107

1.

Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only)
GEORG HEINRICH THYSSEN-BORNEMISZA

2.

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

(a)

o

(b)

o

NOT APPLICABLE

3.

SEC Use Only

4.

Citizenship or Place of Organization
SWITZERLAND

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
23,960,250

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
23,960,250

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
23,960,250

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
40.7%

12.

Type of Reporting Person (See Instructions)
IN

CUSIP No. 451734107

1.

Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only)
CLAUS HIPP

2.

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

(a)

o

(b)

o

NOT APPLICABLE

3.

SEC Use Only

4.

Citizenship or Place of Organization
GERMANY

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
23,960,250

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
23,960,250

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
23,960,250

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
40.7%

12.

Type of Reporting Person (See Instructions)
IN

CUSIP No. 451734107

1.

Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only)
DONALD S. PERKINS

2.

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

(a)

o

(b)

o

NOT APPLICABLE

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
-0-

6.

Shared Voting Power
23,960,250

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
23,960,250

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
23,960,250

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
40.7%

12.

Type of Reporting Person (See Instructions)
IN

CUSIP No. 451734107

1.

Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only)
HANS PETER SCHAER

2.

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

(a)

o

(b)

o

NOT APPLICABLE

3.

SEC Use Only

4.

Citizenship or Place of Organization
SWITZERLAND

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
23,960,250

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
23,960,250

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
23,960,250

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
40.7%

12.

Type of Reporting Person (See Instructions)
IN

Item 1.

(a)

Name of Issuer
IHS Inc.

(b)

Address of Issuer’s Principal Executive Offices
15 Inverness Way East

Englewood CO  80112

Item 2.

(a)

Name of Person Filing
(a)           Urpasis Investments Limited, a Cyprus company and wholly-owned subsidiary of TBG Holdings NV.

(b)           Urvanos Investments Limited, a Cyprus company and a wholly-owned subsidiary of TBG Holdings NV.

(c)           TBG Holdings NV, a Netherlands-Antilles company which is indirectly wholly owned by the Thyssen Bornemisza Continuity Trust.

(d)           Thyssen Bornemisza Continuity Trust, a Bermuda trust which is controlled by Thybo Trustees Limited and Tornabuoni Limited.

(e)           Thybo Trustees Limited, a Bermuda company.

(f)            Tornabuoni Limited, a Guernsey company.

(g)           Georg Heinrich Thyssen-Bornemisza, an individual and a director of Tornabuoni Limited.

(h)           Claus Hipp, an individual and a director of Tornabuoni Limited.

(i)            Donald S. Perkins, an individual and a director of Tornabuoni Limited.

(j)            Hans Peter Schaer, an individual and a director of Tornabuoni Limited.

(b)

Address of Principal Business Office or, if none, Residence
c/o   IHS Inc.

15 Inverness Way East

Englewood CO  80112

(c)

Citizenship
Incorporated by reference to Item 4 of the cover page pertaining to each reporting person.

(d)

Title of Class of Securities
Class A common stock, par value $0.01 per share (the “Class A Common Stock”).

(e)

CUSIP Number
451734107

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:

(a)

o

Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).

(b)

o

Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

(c)

o

Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).

(d)

o

Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C 80a-8).

(e)

o

An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);

(f)

o

An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);

(g)

o

A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);

(h)

o

A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i)

o

A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j)

o

Group, in accordance with §240.13d-1(b)(1)(ii)(J).

Not applicable.

Item 4.

Ownership

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

(a)

Amount beneficially owned:   

(b)

Percent of class:   

(c)

Number of shares as to which the person has:

(i)

Sole power to vote or to direct the vote   

(ii)

Shared power to vote or to direct the vote    

(iii)

Sole power to dispose or to direct the disposition of   

(iv)

Shared power to dispose or to direct the disposition of   

Incorporated by reference to items (5) – (9) and (11) of the cover page pertaining to each reporting person.

(a)           Urpasis Investments Limited is filing solely in its capacity as the former record owner of Class A Common Stock (See Item 5).

(b)           Urvanos Investments Limited is filing solely in its capacity as the record owner of 958,859 shares of Class A Common Stock and 13,750,000 shares of Class B common stock, par value $0.01 per share (the “Class B Common Stock,” and together with the Class A Common Stock, the “Common Stock”), each such share of Class B Common Stock convertible into one share of Class A Common Stock, for a total of 14,708,859 shares of Common Stock. Each share of Class A Common Stock is entitled to one vote per share and, prior to conversion, each share of Class B Common Stock is entitled to ten votes per share. By virtue of its ownership of Class A Common Stock and Class B Common Stock, Urvanos Investments Limited owns approximately 75.8% of the voting power of the Common Stock (which represents approximately 25.0% of the overall economic interest).

(c)           TBG Holdings NV is filing in its capacity as the record owner of 9,251,391 shares of Class A Common Stock and as the parent of Urvanos Investments Limited, which is the record owner of 14,708,859 shares of Common Stock, for a total of 23,960,250 shares of Common Stock. By virtue of its direct and indirect ownership, TBG Holdings NV owns approximately 80.9% of the voting power of the Common Stock (which represents approximately 40.7% of the overall economic interest).

(d)           Thyssen Bornemisza Continuity Trust is filing solely in its capacity as the indirect parent of TBG Holdings NV.

(e)           Thybo Trustees Limited is filing solely in its capacity as a trustee and controlling person of Thyssen Bornemisza Continuity Trust.

(f)            Tornabuoni Limited is filing solely in its capacity as a controlling person of Thyssen Bornemisza Continuity Trust.

(g)           Georg Heinrich Thyssen-Bornemisza is filing solely in his capacity as a director of Tornabuoni Limited.  The board of directors of Tornabuoni Limited may only act by unanimous vote.  Mr. Thyssen-Bornemisza, a beneficiary of the Thyssen Bornemisza Continuity Trust, disclaims beneficial ownership of the Common Stock except to the extent of his interest in the Thyssen Bornemisza Continuity Trust.

(h)           Claus Hipp is filing solely in his capacity as a director of Tornabuoni Limited.  The board of directors of Tornabuoni Limited may only act by unanimous vote.  Mr. Hipp disclaims beneficial ownership of the Common Stock.

(i)            Donald S. Perkins is filing solely in his capacity as a director of Tornabuoni Limited.  The board of directors of Tornabuoni Limited may only act by unanimous vote.  Mr. Perkins disclaims beneficial ownership of the Common Stock.

(j)            Hans Peter Schaer is filing solely in his capacity as a director of Tornabuoni Limited.  The board of directors of Tornabuoni Limited may only act by unanimous vote.  Mr. Schaer disclaims beneficial ownership of the Common Stock.

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   x.

On September 1, 2006, Urpasis Investments Limited dividended all shares of Common Stock held by it to TBG Holdings NV.  Urpasis Investments Limited currently holds no shares of Common Stock.

Item 6.

Ownership of More than Five Percent on Behalf of Another Person

See item 4.

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.

11/13/06

Date

/s/ STEPHEN GREEN

Signature

as Attorney-in-Fact for

URPASIS INVESTMENTS LIMITED,

URVANOS INVESTMENTS LIMITED,

TBG HOLDINGS NV,

THYSSEN BORNEMISZA CONTINUITY
TRUST,

THYBO TRUSTEES LIMITED,

TORNABUONI LIMITED,

GEORG HEINRICH THYSSEN-
BORNEMISZA,

CLAUS HIPP,

DONALD S. PERKINS and

HANS PETER SCHAER

Name/Title

URPASIS INVESTMENTS LIMITED

THYBO TRUSTEES LIMITED

By:

/s/ ICM Robertson

By:

/s/ Eric P. Pfaff

Name: ICM Robertson

Name: Eric P. Pfaff

Title: Director

Title: Director

URVANOS INVESTMENTS LIMITED

TORNABUONI LIMITED

By:

/s/ ICM Robertson

By:

/s/ G. H. Thyssen

Name: ICM Robertson

Name: G. H. Thyssen

Title: Director

Title: Chairman

TBG HOLDINGS NV

/s/ Georg Heinrich Thyssen-Bornemisza

GEORG HEINRICH THYSSEN-BORNEMISZA

By:

/s/ M. v Staudt          /s/ ICM Robertson

Name: M. v Staudt & ICM Robertson

/s/ Claus Hipp

Title: Proxy Holders

CLAUS HIPP

THYSSEN BORNEMISZA CONTINUITY TRUST

/s/ Donald S. Perkins

DONALD S. PERKINS

By:

/s/ Eric P. Pfaff

Name: Eric P. Pfaff

/s/ Hans Peter Schaer

Title: Director-Thybo Trustees Limited

HANS PETER SCHAER