Please answer the given financial question based on the context.
Context: declaration and payment of future quarterly dividends is at the discretion of our board and may be adjusted as business needs or market conditions change . in addition , under the terms of the merger agreement , we have agreed with aetna to coordinate the declaration and payment of dividends so that our stockholders do not fail to receive a quarterly dividend around the time of the closing of the merger . on october 29 , 2015 , the board declared a cash dividend of $ 0.29 per share that was paid on january 29 , 2016 to stockholders of record on december 30 , 2015 , for an aggregate amount of $ 43 million . stock total return performance the following graph compares our total return to stockholders with the returns of the standard & poor 2019s composite 500 index ( 201cs&p 500 201d ) and the dow jones us select health care providers index ( 201cpeer group 201d ) for the five years ended december 31 , 2015 . the graph assumes an investment of $ 100 in each of our common stock , the s&p 500 , and the peer group on december 31 , 2010 , and that dividends were reinvested when paid. .
||12/31/2010|12/31/2011|12/31/2012|12/31/2013|12/31/2014|12/31/2015|
|hum|$ 100|$ 162|$ 128|$ 195|$ 274|$ 343|
|s&p 500|$ 100|$ 102|$ 118|$ 157|$ 178|$ 181|
|peer group|$ 100|$ 110|$ 129|$ 177|$ 226|$ 239|
the stock price performance included in this graph is not necessarily indicative of future stock price performance. .
Question: as of december 30 , what was the number of stockholders of record 2015 in millions
Answer:
148.27586