Oxford Asset Management’s Ribbon Communications RBBN Stock Holding History

Oxford Asset Management’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 Q1	–	Sell	-55,568	Closed	-$160K	–	697
2025 Q4	$160K	Buy	+55,568	New	+$179K	0.06%	416
2020 Q1	–	Sell	-254,259	Closed	-$788K	–	1051
2019 Q4	$788K	Sell	254,259 -91,634	-26%	-$365K	0.02%	1004
2019 Q3	$2.02M	Sell	345,893 -48,322	-12%	-$254K	0.05%	532
2019 Q2	$1.93M	Buy	394,215 +102,157	+35%	+$499K	0.04%	652
2019 Q1	$1.5M	Buy	292,058 +13,265	+5%	+$71K	0.03%	730
2018 Q4	$1.34M	Buy	278,793 +130,036	+87%	+$754K	0.03%	702
2018 Q3	$1.01M	Buy	148,757 +122,693	+471%	+$874K	0.02%	1008
2018 Q2	$185K	Buy	+26,064	New	+$153K	﹤0.01%	1597
2018 Q1	–	Sell	-174,460	Closed	-$1.38M	–	1846
2017 Q4	$1.38M	Buy	174,460 +147,942	+558%	+$1.14M	0.03%	766
2017 Q3	$204K	Buy	+26,518	New	+$190K	﹤0.01%	1419
2016 Q4	–	Sell	-147,958	Closed	-$1.15M	–	851
2016 Q3	$1.15M	Sell	147,958 -30,132	-17%	-$263K	0.04%	494
2016 Q2	$1.55M	Buy	+178,090	New	+$1.48M	0.05%	407

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

PCMI

Paradigm Capital Management Inc Albany, New York $3.67B AUM 121.12% 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

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

Oxford Asset Management's RBBN Position: Q1 2026 in Review

Oxford Asset Management sold out of Ribbon Communications (RBBN) in Q1 2026, closing a stake of 55,568 shares — an estimated $160K sold.

Oxford Asset Management first reported a position in RBBN in Q2 2016 and held it in 12 quarters. The position peaked at $2.02M in Q3 2019. 150 funds tracked by Wall St. Rank hold RBBN as of Q1 2026.

Oxford Asset Management reported no remaining Ribbon Communications position as of Q1 2026 after selling out during the quarter.
Oxford Asset Management sold 55,568 Ribbon Communications shares in Q1 2026, an estimated $160K.
Oxford Asset Management first reported a position in Ribbon Communications in Q2 2016 and held it in 12 quarters.
Oxford Asset Management's Ribbon Communications position peaked at $2.02M in Q3 2019.
150 funds tracked by Wall St. Rank held Ribbon Communications as of Q1 2026.

Based on Oxford Asset Management's 13F filing for Q1 2026, filed 15 May 2026.