| Public Equity Partners Management, L.P. | 
                    0.47% | 
                    20 Jul 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    0.56% | 
                    27 Jun 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    0.64% | 
                    26 Jun 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    0.75% | 
                    22 Jun 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    0.81% | 
                    21 Jun 2017 | 
                
        
                
                    | AEK (UK) Limited | 
                    0.29% | 
                    20 Jun 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.06% | 
                    20 Jun 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.43% | 
                    19 Jun 2017 | 
                
        
                
                    | AEK (UK) Limited | 
                    0.51% | 
                    9 Jun 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.58% | 
                    7 Jun 2017 | 
                
        
                
                    | AEK (UK) Limited | 
                    0.65% | 
                    1 Jun 2017 | 
                
        
                
                    | AEK (UK) Limited | 
                    0.81% | 
                    31 May 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.67% | 
                    31 May 2017 | 
                
        
                
                    | AEK (UK) Limited | 
                    1.07% | 
                    30 May 2017 | 
                
        
                
                    | AEK (UK) Limited | 
                    1.13% | 
                    26 May 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.79% | 
                    26 May 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.87% | 
                    25 May 2017 | 
                
        
                
                    | AEK (UK) Limited | 
                    1.23% | 
                    24 May 2017 | 
                
        
                
                    | AEK (UK) Limited | 
                    1.39% | 
                    22 May 2017 | 
                
        
                
                    | AEK (UK) Limited | 
                    1.59% | 
                    18 May 2017 | 
                
        
                
                    | AEK (UK) Limited | 
                    1.73% | 
                    17 May 2017 | 
                
        
                
                    | AEK (UK) Limited | 
                    1.83% | 
                    16 May 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.94% | 
                    16 May 2017 | 
                
        
                
                    | AEK (UK) Limited | 
                    1.91% | 
                    15 May 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.88% | 
                    15 May 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.79% | 
                    12 May 2017 | 
                
        
                
                    | AEK (UK) Limited | 
                    2.08% | 
                    11 May 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.62% | 
                    11 May 2017 | 
                
        
                
                    | AEK (UK) Limited | 
                    2.15% | 
                    10 May 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.55% | 
                    10 May 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.48% | 
                    9 May 2017 | 
                
        
                
                    | Oxford Asset Management | 
                    0.49% | 
                    28 Apr 2017 | 
                
        
                
                    | Oxford Asset Management | 
                    0.59% | 
                    13 Apr 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.33% | 
                    30 Mar 2017 | 
                
        
                
                    | AEK (UK) Limited | 
                    2.26% | 
                    13 Mar 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.26% | 
                    13 Jan 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.32% | 
                    12 Jan 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.44% | 
                    11 Jan 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.78% | 
                    6 Jan 2017 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.83% | 
                    5 Jan 2017 | 
                
        
                
                    | AEK (UK) Limited | 
                    2.61% | 
                    21 Dec 2016 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.90% | 
                    20 Dec 2016 | 
                
        
                
                    | AEK (UK) Limited | 
                    2.88% | 
                    19 Dec 2016 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.89% | 
                    19 Dec 2016 | 
                
        
                
                    | Oxford Asset Management | 
                    0.60% | 
                    16 Dec 2016 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    2.00% | 
                    16 Dec 2016 | 
                
        
                
                    | Sand Grove Capital Management LLP | 
                    0.00% | 
                    13 Dec 2016 | 
                
        
                
                    | Oxford Asset Management | 
                    0.50% | 
                    2 Dec 2016 | 
                
        
                
                    | Sand Grove Capital Management LLP | 
                    0.72% | 
                    2 Dec 2016 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    2.12% | 
                    1 Dec 2016 | 
                
        
                
                    | Sand Grove Capital Management LLP | 
                    0.63% | 
                    1 Dec 2016 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    2.02% | 
                    30 Nov 2016 | 
                
        
                
                    | Sand Grove Capital Management LLP | 
                    0.58% | 
                    30 Nov 2016 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.91% | 
                    25 Nov 2016 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.89% | 
                    23 Nov 2016 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.70% | 
                    17 Nov 2016 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.52% | 
                    9 Nov 2016 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.42% | 
                    8 Nov 2016 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.35% | 
                    4 Nov 2016 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.26% | 
                    2 Nov 2016 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.16% | 
                    1 Nov 2016 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    1.00% | 
                    28 Oct 2016 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    0.85% | 
                    27 Oct 2016 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    0.75% | 
                    26 Oct 2016 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    0.63% | 
                    25 Oct 2016 | 
                
        
                
                    | Public Equity Partners Management, L.P. | 
                    0.59% | 
                    24 Oct 2016 | 
                
        
                
                    | AEK (UK) Limited | 
                    3.13% | 
                    7 Oct 2016 | 
                
        
                
                    | AEK (UK) Limited | 
                    3.09% | 
                    6 Oct 2016 | 
                
        
                
                    | AEK (UK) Limited | 
                    3.01% | 
                    5 Oct 2016 | 
                
        
                
                    | AEK (UK) Limited | 
                    2.92% | 
                    4 Oct 2016 | 
                
        
                
                    | AEK (UK) Limited | 
                    2.79% | 
                    29 Sep 2016 | 
                
        
                
                    | AEK (UK) Limited | 
                    2.59% | 
                    28 Sep 2016 | 
                
        
                
                    | AEK (UK) Limited | 
                    2.28% | 
                    12 Aug 2016 | 
                
        
                
                    | AEK (UK) Limited | 
                    1.98% | 
                    11 Aug 2016 | 
                
        
                
                    | AEK (UK) Limited | 
                    1.62% | 
                    23 Jun 2016 | 
                
        
                
                    | AEK (UK) Limited | 
                    1.34% | 
                    21 Jun 2016 | 
                
        
                
                    | AEK (UK) Limited | 
                    1.21% | 
                    20 Jun 2016 | 
                
        
                
                    | AEK (UK) Limited | 
                    0.98% | 
                    17 Jun 2016 | 
                
        
                
                    | AEK (UK) Limited | 
                    0.78% | 
                    16 Jun 2016 | 
                
        
                
                    | AEK (UK) Limited | 
                    0.61% | 
                    14 Jun 2016 | 
                
        
                
                    | WorldQuant LLC | 
                    0.45% | 
                    13 Jan 2016 | 
                
        
                
                    | WorldQuant LLC | 
                    0.55% | 
                    11 Jan 2016 | 
                
        
                
                    | WorldQuant LLC | 
                    0.67% | 
                    8 Jan 2016 | 
                
        
                
                    | WorldQuant LLC | 
                    0.72% | 
                    7 Jan 2016 | 
                
        
                
                    | WorldQuant LLC | 
                    0.68% | 
                    4 Jan 2016 | 
                
        
                
                    | WorldQuant LLC | 
                    0.79% | 
                    29 Dec 2015 | 
                
        
                
                    | WorldQuant LLC | 
                    0.80% | 
                    21 Dec 2015 | 
                
        
                
                    | WorldQuant LLC | 
                    0.73% | 
                    16 Dec 2015 | 
                
        
                
                    | Barclays Capital Securities Ltd | 
                    0.04% | 
                    14 Dec 2015 | 
                
        
                
                    | WorldQuant LLC | 
                    0.62% | 
                    14 Dec 2015 | 
                
        
                
                    | Barclays Capital Securities Ltd | 
                    0.79% | 
                    11 Dec 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    0.49% | 
                    30 Nov 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    0.51% | 
                    18 Nov 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    0.49% | 
                    4 Nov 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    0.55% | 
                    2 Nov 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    0.67% | 
                    16 Oct 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    0.79% | 
                    8 Oct 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    0.88% | 
                    5 Oct 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    0.89% | 
                    11 Sep 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    0.90% | 
                    10 Sep 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    0.86% | 
                    3 Sep 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    0.96% | 
                    1 Sep 2015 | 
                
        
                
                    | WorldQuant LLC | 
                    0.48% | 
                    28 Aug 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    1.01% | 
                    27 Aug 2015 | 
                
        
                
                    | WorldQuant LLC | 
                    0.57% | 
                    27 Aug 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    0.99% | 
                    26 Aug 2015 | 
                
        
                
                    | WorldQuant LLC | 
                    0.65% | 
                    25 Aug 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    1.02% | 
                    24 Aug 2015 | 
                
        
                
                    | WorldQuant LLC | 
                    0.59% | 
                    24 Aug 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    0.90% | 
                    20 Aug 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    0.81% | 
                    18 Aug 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    0.71% | 
                    12 Aug 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    0.67% | 
                    11 Aug 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    0.70% | 
                    10 Aug 2015 | 
                
        
                
                    | WorldQuant LLC | 
                    0.49% | 
                    5 Aug 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    0.60% | 
                    4 Aug 2015 | 
                
        
                
                    | WorldQuant LLC | 
                    0.50% | 
                    30 Jul 2015 | 
                
        
                
                    | BlueCrest Capital Management Limited | 
                    0.51% | 
                    29 Jul 2015 | 
                
        
                
                    | Magnetar Financial (UK) LLP | 
                    0.00% | 
                    6 May 2015 | 
                
        
                
                    | Ennismore Fund Management Limited | 
                    0.38% | 
                    5 May 2015 | 
                
        
                
                    | Jane Street Group, LLC | 
                    0.03% | 
                    5 May 2015 | 
                
        
                
                    | Magnetar Financial (UK) LLP | 
                    2.25% | 
                    5 May 2015 | 
                
        
                
                    | Susquehanna International Holdings LLC | 
                    0.00% | 
                    5 May 2015 | 
                
        
                
                    | Magnetar Financial (UK) LLP | 
                    2.48% | 
                    1 May 2015 | 
                
        
                
                    | Susquehanna International Holdings LLC | 
                    0.95% | 
                    29 Apr 2015 | 
                
        
                
                    | Jane Street Group, LLC | 
                    0.67% | 
                    28 Apr 2015 | 
                
        
                
                    | Magnetar Financial (UK) LLP | 
                    2.52% | 
                    28 Apr 2015 | 
                
        
                
                    | Susquehanna International Holdings LLC | 
                    0.75% | 
                    28 Apr 2015 | 
                
        
                
                    | Magnetar Financial (UK) LLP | 
                    2.21% | 
                    27 Apr 2015 | 
                
        
                
                    | Susquehanna International Holdings LLC | 
                    0.61% | 
                    27 Apr 2015 | 
                
        
                
                    | Magnetar Financial (UK) LLP | 
                    1.78% | 
                    24 Apr 2015 | 
                
        
                
                    | Susquehanna International Holdings LLC | 
                    0.33% | 
                    24 Apr 2015 | 
                
        
                
                    | Jane Street Group, LLC | 
                    0.55% | 
                    23 Apr 2015 | 
                
        
                
                    | Magnetar Financial (UK) LLP | 
                    1.32% | 
                    23 Apr 2015 | 
                
        
                
                    | Magnetar Financial (UK) LLP | 
                    1.13% | 
                    22 Apr 2015 | 
                
        
                
                    | Ennismore Fund Management Limited | 
                    1.00% | 
                    21 Apr 2015 | 
                
        
                
                    | Magnetar Financial (UK) LLP | 
                    0.79% | 
                    21 Apr 2015 | 
                
        
                
                    | Ennismore Fund Management Limited | 
                    0.81% | 
                    20 Apr 2015 | 
                
        
                
                    | Ennismore Fund Management Limited | 
                    0.54% | 
                    17 Apr 2015 | 
                
        
                
                    | Ennismore Fund Management Limited | 
                    0.47% | 
                    9 Apr 2015 | 
                
        
                
                    | AKO Capital LLP | 
                    0.29% | 
                    25 Mar 2015 | 
                
        
                
                    | AKO Capital LLP | 
                    0.79% | 
                    24 Mar 2015 | 
                
        
                
                    | AKO Capital LLP | 
                    0.98% | 
                    23 Mar 2015 | 
                
        
                
                    | Ennismore Fund Management Limited | 
                    0.52% | 
                    6 Feb 2015 | 
                
        
                
                    | AKO Capital LLP | 
                    1.33% | 
                    31 Dec 2014 | 
                
        
                
                    | AKO Capital LLP | 
                    1.22% | 
                    30 Dec 2014 | 
                
        
                
                    | AKO Capital LLP | 
                    1.11% | 
                    29 Dec 2014 | 
                
        
                
                    | AKO Capital LLP | 
                    1.03% | 
                    18 Dec 2014 | 
                
        
                
                    | AKO Capital LLP | 
                    0.73% | 
                    17 Dec 2014 | 
                
        
                
                    | Susquehanna International Holdings LLC | 
                    0.95% | 
                    29 Apr 2014 | 
                
        
                
                    | Susquehanna International Holdings LLC | 
                    0.75% | 
                    28 Apr 2014 | 
                
        
                
                    | Susquehanna International Holdings LLC | 
                    0.61% | 
                    27 Apr 2014 |