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PROTO LABS INC
PROTO LABS INC. Institutional holdings reported to the SEC.

Institutional Holders (2015Q3)
Portfolio Summary: 3 Institutional holders with a total value of $1,550,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 SIMPLEX TRADING, LLC 33 2,000 0.13% Call
2 GROUP ONE TRADING LLC 3,000 201,000 12.97% Call
3 CITADEL ADVISORS LLC 20,100 1,347,000 86.90% Call

From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.