Emera Volume up almost 900%

Who got rich yesterday? 

Look at the volume yesterday after Premier announced an announcement and POOF. Who did the trading?
Almost 900%

 

Price History

Last: 29.65 Last Trade: Dec 11, 2013

Date	High	Low	Open	Close	Volume
Dec 11	29.85	29.45	29.78	29.65	365,092
Dec 10	29.94	29.00	29.00	29.76	2,473,433
Dec 9	29.30	29.13	29.20	29.18	280,280
Dec 6	29.50	29.16	29.49	29.20	318,781
Dec 5	29.36	29.15	29.34	29.34	163,094
Dec 4	29.42	29.08	29.35	29.38	307,003
Dec 3	29.38	29.08	29.25	29.34	216,965
Dec 2	29.45	29.20	29.30	29.29	249,717
Nov 29	29.41	29.15	29.31	29.32	282,249
Nov 28	29.52	29.30	29.43	29.45	149,234
Nov 27	29.71	29.35	29.71	29.50	232,207
Nov 26	29.77	29.37	29.68	29.74	331,539
Nov 25	29.88	29.59	29.88	29.68	207,574
Nov 22	29.96	29.70	29.80	29.81	239,192
Nov 21	29.88	29.68	29.68	29.74	173,946
Nov 20	29.89	29.60	29.75	29.73	241,828
Nov 19	29.97	29.54	29.92	29.71	227,198
Nov 18	30.05	29.83	29.98	29.85	199,344
Nov 15	30.00	29.50	29.60	29.87	460,071
Nov 14	29.96	29.53	29.71	29.57	409,438
Nov 13	29.92	29.51	29.60	29.52	361,419
Nov 12	29.96	29.51	29.64	29.51	433,534
Nov 11	30.11	29.43	30.11	29.56	395,537
Nov 8	30.25	29.45	30.20	29.71	563,252
Nov 7	30.50	30.02	30.49	30.20	310,945