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

Institutional Holders (2014Q3)
Portfolio Summary: 3 Institutional holders with a total value of $4,465,000.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 PEAK6 Group LLC 34,300 2,367,000 53.01% Call
2 CITADEL ADVISORS LLC 27,100 1,870,000 41.88% Call
3 GROUP ONE TRADING LLC 3,300 228,000 5.11% 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.