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

Institutional Holders (2014Q4)
Portfolio Summary: 3 Institutional holders with a total value of $1,241,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 CITADEL ADVISORS LLC 14,100 947,000 76.31% Put
2 GROUP ONE TRADING LLC 4,300 289,000 23.29% Put
3 SIMPLEX TRADING, LLC 22 5,000 0.40% Put

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.