Addendum to the Lease Agreement from 01/28/2011 between 4-Antibody AG, Hochbergerstr. 60C, 4057 Basel (Sublessee) and Technologie Park Basel AG, c/o Amt für Wirtschaft und Arbeit [Office for Economy and Labor], Utengasse 36, 4005 Basel (Principal Lessee)

Addendum to the Lease Agreement from 01/28/2011 between

4-Antibody AG, Xxxxxxxxxxxxx. 00X, 0000 Xxxxx

(Sublessee)

and

Technologie Park Basel AG, c/o Amt für Wirtschaft und Arbeit [Office for Economy and Labor], Xxxxxxxxx 00, 0000 Xxxxx

(Principal Lessee)

The two parties named above declare that the following spaces are added to the leased spaces in Technologie Park Basel (Xxxxxxxxxxxxxxxxx 00X, 0000 Xxxxx) as of 03/31/2012:

- Office: X0_00, 0^xx Xxxxx, approx. 12 m2,

- Office: X0_00, 0^xx Xxxxx, approx. 12 m2,

- Office: X0_00, 0^xx Xxxxx, approx. 24 m2,

- Office: C4_20, 4^th Floor, approx. 12 m2, rent costs:

	per month	per year
Rent	CHF 1,476.00	CHF 17,712.00
Incidental costs	CHF 338.25	CHF 4,059.00
VAT (8%)	CHF 145.15	CHF 1,741.70
Total	CHF 1,959.40	CHF 23,512.70

4-Antibody AG	Technologie Park Basel AG
Basel, on [hw:] 09/24/2012	Basel, on [hw:] 10/16/2012
[signature] Dr. Xxxxxx Burns Chief Executive Officer	[signature] Hans Jürg Dolder VR1
[signature] Xxxxxxx Schmid Group Head of HR	[signature] Xxxxxx Hess VR2

[logo]        4-Antibody AG

4-Antibody    Xxxxxxxxxxxxxxxxx 00X

0000 Xxxxx / Xxxxxxxxxxx