Winton Group’s Ribbon Communications RBBN Stock Holding History

Winton Group’s Portfolio RBBN Stock Details RBBN Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$350K	Buy	149,404 +99,289	+198%	+$262K	0.01%	830
2026 Q1	$106K	Buy	50,115 +17,020	+51%	+$40.7K	﹤0.01%	1038
2025 Q4	$95.3K	Buy	+33,095	New	+$107K	﹤0.01%	876
2021 Q4	–	Sell	-47,799	Closed	-$286K	–	1316
2021 Q3	$286K	Buy	47,799 +1,513	+3%	+$10.2K	0.02%	1117
2021 Q2	$352K	Buy	46,286 +14,936	+48%	+$114K	0.02%	1107
2021 Q1	$257K	Sell	31,350 -1,098	-3%	-$9.09K	0.01%	1201
2020 Q4	$213K	Sell	32,448 -56,750	-64%	-$300K	0.02%	1171
2020 Q3	$345K	Sell	89,198 -54,850	-38%	-$231K	0.01%	1206
2020 Q2	$566K	Sell	144,048 -24,669	-15%	-$89.6K	0.01%	1160
2020 Q1	$511K	Buy	168,717 +49,058	+41%	+$147K	0.01%	1024
2019 Q4	$371K	Buy	119,659 +98,572	+467%	+$392K	0.01%	1323
2019 Q3	$123K	Buy	+21,087	New	+$111K	﹤0.01%	1446

Other funds holding RBBN

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Neuberger Berman Group New York $150B AUM 40.08% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Royce & Associates New York $12.4B AUM 64.17% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

PCMI

Paradigm Capital Management Inc Albany, New York $3.67B AUM 121.12% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Connor, Clark & Lunn Investment Management (CC&L) Vancouver, British Columbia, Canada $52.8B AUM 58.98% 1-Year Est. Return

Winton Group's RBBN Position: Q2 2026 in Review

Winton Group increased its Ribbon Communications (RBBN) stake by 198% in Q2 2026, buying an estimated $262K and bringing the position to 149,404 shares worth $350K. The position accounts for 0.01% of the portfolio, ranked #830.

Winton Group first reported a position in RBBN in Q3 2019 and has held it in 12 quarters since. The position peaked at $566K in Q2 2020. 160 funds tracked by Wall St. Rank hold RBBN as of Q2 2026.

Winton Group held 149,404 shares of Ribbon Communications worth $350K as of Q2 2026.
Winton Group bought 99,289 Ribbon Communications shares in Q2 2026, an estimated $262K.
Ribbon Communications made up 0.01% of Winton Group's portfolio in Q2 2026, its #830 holding.
Winton Group first reported a position in Ribbon Communications in Q3 2019 and has held it in 12 quarters since.
Winton Group's Ribbon Communications position peaked at $566K in Q2 2020.
160 funds tracked by Wall St. Rank held Ribbon Communications as of Q2 2026.

Based on Winton Group's 13F filing for Q2 2026, filed 7 Aug 2026.