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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 $3,564,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 GROUP ONE TRADING LLC 26,600 1,782,000 50.00% Put
2 CITADEL ADVISORS LLC 26,300 1,762,000 49.44% Put
3 SIMPLEX TRADING, LLC 53 20,000 0.56% 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.