MEDNAX INC

Ticker: MD CUSIP: 58502B106 Class: EQTY

RATIONAL ADVISORS LLC's Holding History (CIK: 0001143565)

Note: Option positions (PUT/CALL) are excluded.

Q4 2013

Shares 2,244 Value ($000) $120 Avg Close $53.66 Range $49.83 - $56.45

Q3 2013

Shares 1,162 Value ($000) $117 Avg Close $48.80 Range $45.29 - $51.48

Q2 2013

Shares 1,140 Value ($000) $104 Avg Close $44.76 Range $41.83 - $47.29

Q1 2013

Shares 1,830 Value ($000) $164 Avg Close $42.98 Range $40.33 - $44.98

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2013	2,244	$120	$53.66	$49.83 - $56.45
Q3 2013	1,162	$117	$48.80	$45.29 - $51.48
Q2 2013	1,140	$104	$44.76	$41.83 - $47.29
Q1 2013	1,830	$164	$42.98	$40.33 - $44.98