PROTO LABS INC

Ticker: PRLB CUSIP: 743713109 Class: EQTY

TCW GROUP INC's Holding History (CIK: 0000850401)

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

Q1 2015

Shares 113,095 Value ($000) $7,916 Avg Close $67.69 Range $57.30 - $74.82

Q4 2014

Shares 163,060 Value ($000) $10,951 Avg Close $65.74 Range $54.97 - $73.46

Q3 2014

Shares 80,465 Value ($000) $5,552 Avg Close $78.24 Range $68.88 - $94.23

Q2 2014

Shares 207,823 Value ($000) $17,026 Avg Close $67.73 Range $58.06 - $83.06

Q1 2014

Shares 154,959 Value ($000) $10,487 Avg Close $74.38 Range $62.09 - $84.00

Q4 2013

Shares 43,092 Value ($000) $3,067 Avg Close $77.51 Range $65.52 - $89.97

Q3 2013

Shares 6,896 Value ($000) $527 Avg Close $69.23 Range $61.46 - $80.66

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2015	113,095	$7,916	$67.69	$57.30 - $74.82
Q4 2014	163,060	$10,951	$65.74	$54.97 - $73.46
Q3 2014	80,465	$5,552	$78.24	$68.88 - $94.23
Q2 2014	207,823	$17,026	$67.73	$58.06 - $83.06
Q1 2014	154,959	$10,487	$74.38	$62.09 - $84.00
Q4 2013	43,092	$3,067	$77.51	$65.52 - $89.97
Q3 2013	6,896	$527	$69.23	$61.46 - $80.66