Sigrist Joseph Anton

Director at DoubleDown Interactive Co., Ltd. · on record since Mar 13, 2026
Chief Financial Officer at DoubleDown Interactive Co., Ltd. · on record since Mar 13, 2026
SVP, GM Video Solutions at POLYCOM INC · on record since Jul 29, 2009

Insider trading activity of Sigrist Joseph Anton

Transactions on record: 56; since Apr 5, 2006

Open-market buys: 0

Open-market sells: 22; $4.3M

Companies traded: 1; last filing Aug 31, 2010

Figures computed from official regulatory filings — .

Companies where Sigrist Joseph Anton has traded

POLYCOM INC56 tx · $7.2M · Aug 31, 2010

Track record of Sigrist Joseph Anton

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Transaction history of Sigrist Joseph Anton

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Src
POLYCOM INCListing unverified	Aug 31, 2010	Exercise	40,000	21.05	$842K	SEC
POLYCOM INCListing unverified	Aug 31, 2010	Exercise	40,000	21.05	$842K	SEC
POLYCOM INCListing unverified	Aug 31, 2010	Sell	-40,000	28.25	$1.1M	SEC
POLYCOM INCListing unverified	Aug 31, 2010	ExerciseD (derivative)	-40,000	0.00	—	SEC
POLYCOM INCListing unverified	Aug 31, 2010	ExerciseD (derivative)	-40,000	0.00	—	SEC
POLYCOM INCListing unverified	Aug 31, 2010	Sell	-40,000	28.81	$1.2M	SEC
POLYCOM INCListing unverified	May 13, 2010	Sell	-6,000	30.90	$185.4K	SEC
POLYCOM INCListing unverified	Feb 24, 2010	Sell	-1,000	25.58	$25.6K	SEC
POLYCOM INCListing unverified	Feb 24, 2010	Sell	-1,200	25.59	$30.7K	SEC
POLYCOM INCListing unverified	Feb 24, 2010	Sell	-700	25.56	$17.9K	SEC
POLYCOM INCListing unverified	Feb 24, 2010	Sell	-3,500	25.56	$89.5K	SEC
POLYCOM INCListing unverified	Feb 24, 2010	Sell	-600	25.57	$15.3K	SEC
POLYCOM INCListing unverified	Feb 23, 2010	ExerciseD (derivative)	-5,000	0.00	—	SEC
POLYCOM INCListing unverified	Feb 23, 2010	ExerciseD (derivative)	-7,080	0.00	—	SEC
POLYCOM INCListing unverified	Feb 23, 2010	Other	-2,597	26.20	$68K	SEC
POLYCOM INCListing unverified	Feb 23, 2010	Exercise	5,000	0.00	—	SEC
POLYCOM INCListing unverified	Feb 23, 2010	Exercise	6,100	0.00	—	SEC
POLYCOM INCListing unverified	Feb 23, 2010	ExerciseD (derivative)	-6,100	0.00	—	SEC
POLYCOM INCListing unverified	Feb 23, 2010	Exercise	7,080	0.00	—	SEC
POLYCOM INCListing unverified	Feb 23, 2010	Other	-2,238	26.20	$58.6K	SEC
POLYCOM INCListing unverified	Feb 23, 2010	Other	-1,998	26.20	$52.3K	SEC
POLYCOM INCListing unverified	Feb 8, 2010	AwardD (derivative)	17,500	0.00	—	SEC
POLYCOM INCListing unverified	Feb 8, 2010	AwardD (derivative)	17,500	0.00	—	SEC
POLYCOM INCListing unverified	Jul 29, 2009	Sell	-82	23.51	$1.9K	SEC
POLYCOM INCListing unverified	Jul 29, 2009	Sell	-1,536	23.49	$36.1K	SEC

Company	Filed	Type	Qty	Price	Value · USD	Src
POLYCOM INCListing unverified	Aug 31, 2010	Exercise	40,000	21.05	$842K	SEC
POLYCOM INCListing unverified	Aug 31, 2010	Exercise	40,000	21.05	$842K	SEC
POLYCOM INCListing unverified	Aug 31, 2010	Sell	-40,000	28.25	$1.1M	SEC
POLYCOM INCListing unverified	Aug 31, 2010	ExerciseD (derivative)	-40,000	0.00	—	SEC
POLYCOM INCListing unverified	Aug 31, 2010	ExerciseD (derivative)	-40,000	0.00	—	SEC
POLYCOM INCListing unverified	Aug 31, 2010	Sell	-40,000	28.81	$1.2M	SEC
POLYCOM INCListing unverified	May 13, 2010	Sell	-6,000	30.90	$185.4K	SEC
POLYCOM INCListing unverified	Feb 24, 2010	Sell	-1,000	25.58	$25.6K	SEC
POLYCOM INCListing unverified	Feb 24, 2010	Sell	-1,200	25.59	$30.7K	SEC
POLYCOM INCListing unverified	Feb 24, 2010	Sell	-700	25.56	$17.9K	SEC
POLYCOM INCListing unverified	Feb 24, 2010	Sell	-3,500	25.56	$89.5K	SEC
POLYCOM INCListing unverified	Feb 24, 2010	Sell	-600	25.57	$15.3K	SEC
POLYCOM INCListing unverified	Feb 23, 2010	ExerciseD (derivative)	-5,000	0.00	—	SEC
POLYCOM INCListing unverified	Feb 23, 2010	ExerciseD (derivative)	-7,080	0.00	—	SEC
POLYCOM INCListing unverified	Feb 23, 2010	Other	-2,597	26.20	$68K	SEC
POLYCOM INCListing unverified	Feb 23, 2010	Exercise	5,000	0.00	—	SEC
POLYCOM INCListing unverified	Feb 23, 2010	Exercise	6,100	0.00	—	SEC
POLYCOM INCListing unverified	Feb 23, 2010	ExerciseD (derivative)	-6,100	0.00	—	SEC
POLYCOM INCListing unverified	Feb 23, 2010	Exercise	7,080	0.00	—	SEC
POLYCOM INCListing unverified	Feb 23, 2010	Other	-2,238	26.20	$58.6K	SEC
POLYCOM INCListing unverified	Feb 23, 2010	Other	-1,998	26.20	$52.3K	SEC
POLYCOM INCListing unverified	Feb 8, 2010	AwardD (derivative)	17,500	0.00	—	SEC
POLYCOM INCListing unverified	Feb 8, 2010	AwardD (derivative)	17,500	0.00	—	SEC
POLYCOM INCListing unverified	Jul 29, 2009	Sell	-82	23.51	$1.9K	SEC
POLYCOM INCListing unverified	Jul 29, 2009	Sell	-1,536	23.49	$36.1K	SEC

Sigrist Joseph Anton

Insider trading activity of Sigrist Joseph Anton

Companies where Sigrist Joseph Anton has traded

Track record of Sigrist Joseph Anton

Transaction history of Sigrist Joseph Anton

Co-insiders of Sigrist Joseph Anton

Sigrist Joseph Anton

Insider trading activity of Sigrist Joseph Anton

Companies where Sigrist Joseph Anton has traded

Track record of Sigrist Joseph Anton

Transaction history of Sigrist Joseph Anton

Co-insiders of Sigrist Joseph Anton