Hillsdale Investment Management’s Ribbon Communications RBBN Stock Holding History

Hillsdale Investment 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 Q2	$213K	Buy	+91,013	New	+$240K	﹤0.01%	563
2025 Q2	–	Sell	-326,627	Closed	-$1.28M	–	698
2025 Q1	$1.28M	Buy	+326,627	New	+$1.38M	0.07%	239
2022 Q1	–	Sell	-578,300	Closed	-$3.5M	–	604
2021 Q4	$3.5M	Sell	578,300 -500	-0.1%	-$2.96K	0.23%	140
2021 Q3	$3.46M	Hold	578,800	–	–	0.27%	132
2021 Q2	$4.4M	Hold	578,800	–	–	0.35%	93
2021 Q1	$4.75M	Hold	578,800	–	–	0.4%	79
2020 Q4	$3.8M	Sell	578,800 -5,100	-0.9%	-$26.9K	0.36%	92
2020 Q3	$2.26M	Hold	583,900	–	–	0.22%	141
2020 Q2	$2.29M	Sell	583,900 -10,000	-2%	-$36.3K	0.21%	146
2020 Q1	$1.8M	Sell	593,900 -5,700	-1%	-$17.1K	0.22%	136
2019 Q4	$1.86M	Buy	599,600 +366,225	+157%	+$1.46M	0.16%	161
2019 Q3	$1.36M	Buy	+233,375	New	+$1.23M	0.12%	171
2016 Q4	–	Sell	-53,300	Closed	-$415K	–	535
2016 Q3	$415K	Buy	53,300 +5,000	+10%	+$43.7K	0.11%	188
2016 Q2	$420K	Hold	48,300	–	–	0.12%	141
2016 Q1	$364K	Buy	+48,300	New	+$323K	0.12%	201

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

Hillsdale Investment Management's RBBN Position: Q2 2026 in Review

Hillsdale Investment Management opened a new position in Ribbon Communications (RBBN) in Q2 2026: 91,013 shares worth $213K. The stake represents ﹤0.01% of the portfolio and ranks #563 among its holdings. This is a return to the name: Hillsdale Investment Management previously reported a position in RBBN as recently as Q1 2025.

Hillsdale Investment Management first reported a position in RBBN in Q1 2016 and has held it in 15 quarters since. The position peaked at $4.75M in Q1 2021. 160 funds tracked by Wall St. Rank hold RBBN as of Q2 2026.

Hillsdale Investment Management held 91,013 shares of Ribbon Communications worth $213K as of Q2 2026.
Ribbon Communications was a new Hillsdale Investment Management position in Q2 2026.
Ribbon Communications made up ﹤0.01% of Hillsdale Investment Management's portfolio in Q2 2026, its #563 holding.
Hillsdale Investment Management first reported a position in Ribbon Communications in Q1 2016 and has held it in 15 quarters since.
Hillsdale Investment Management's Ribbon Communications position peaked at $4.75M in Q1 2021.
160 funds tracked by Wall St. Rank held Ribbon Communications as of Q2 2026.

Based on Hillsdale Investment Management's 13F filing for Q2 2026, filed 12 Aug 2026.