3-D SYS CORP DEL

Ticker: DDD CUSIP: 88554D205 Class: Stock

Yorktown Management & Research Co Inc's Holding History (CIK: 0001313559)

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

Q4 2013
Shares 3,600 Value ($000) $335 Avg Close $70.11 Range $47.33 - $95.40