Off-Balance Sheet and Other Information

Assets Pledged or Assigned as Security for Own Obligations, Assets Subject to Reservation of Title

	31.12.05		31.12.04		Change in %
CHF million	Book value	Effective liability	Book value	Effective liability	Book value	Effective liability
Money market paper	26,513	6,120	15,387	4,633	72	32
Mortgage loans	64	38	175	60	(63)	(37)
Securities	102,330	48,580	79,534	41,310	29	18
Total	128,907	54,738	95,096	46,003	36	19

Assets are pledged as collateral for securities borrowing and repurchase transactions, for collateralized credit lines with central banks, loans from mortgage institutions and security deposits relating to stock exchange membership.

Commitments and Contingent Liabilities

			% change from
CHF million	31.12.05	31.12.04	31.12.04
Contingent liabilities	184,665	123,429	50
Irrevocable commitments	68,071	50,552	35
Liabilities for calls on shares and other equities	130	104	25
Confirmed credits	2,004	1,820	10

Derivative Instruments

	31.12.05			31.12.04
CHF million	PRV ¹	NRV ²	Notional amount CHF bn	PRV	NRV	Notional amount CHF bn
Interest rate contracts	222,508	221,437	20,656	174,994	183,210	15,398
Credit derivative contracts	15,811	16,427	1,557	7,895	9,353	671
Foreign exchange contracts	57,705	58,600	4,757	81,377	79,046	3,729
Precious metal contracts	3,616	3,444	82	1,919	1,590	61
Equity / index contracts	25,663	49,924	706	20,487	44,107	721
Commodity contracts	10,677	9,647	194	1,739	1,616	41
Total derivative instruments	335,980	359,479	27,952	288,411	318,922	20,621
Replacement values netting	199,477	199,477		160,111	160,111
Replacement values after netting	136,503	160,002		128,300	158,811

1 PRV (Positive replacement values). 2 NRV (Negative replacement values).

Fiduciary Transactions

			% change from
CHF million	31.12.05	31.12.04	31.12.04
Deposits:
with other banks	37,171	30,581	22
with Group banks	1,382	740	87
Loans and other financial transactions	0	6	(100)t\
Total	38,553	31,327	23

Due to UBS Pension Plans, Loans to Corporate Bodies / Related Parties

			% change from
CHF million	31.12.05	31.12.04	31.12.04
Due to UBS pension plans and UBS debt instruments held by pension plans	719	1,329	(46)t\
Securities borrowed from pension plans	2,222	3,778	(41)t\
Loans to directors, senior executives and auditors ¹	21	16	31

¹ Loans to directors, senior executives and auditors are loans to members of the Board of Directors, the Group Executive Board and the Groups official auditors under Swiss company law. This also includes loans to companies which are controlled by these natural or legal persons. There are no loans to the auditors.

The employees of UBS AG are covered through the pension plans of UBS Group. The major Group pension plans are disclosed in Note 30 of the Groups Financial Statements.

a) Defined benefit plans

Swiss pension plan

In 2005, UBS AG contributed CHF 372 million (2004: CHF 336 million) to the Swiss pension plan of UBS Group.

Foreign pension plans

UBS Group operates various other pension plans in foreign locations which cover the employees of UBS AG and other employees of UBS Group at these locations. In 2005, UBS AG contributed CHF 82 million (2004: CHF 59 million) to these plans.

b) Defined contribution plans

UBS Group also sponsors a number of defined contribution plans, primarily in the UK and the US. In 2005, UBS AG contributed CHF 60 million (2004: CHF 73 million) to these plans.

Personnel

Parent Bank personnel was 38,189 on 31 December 2005 and 35,542 on 31 December 2004.