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RBBN — RIBBON COMMUNICATIONS INC

Reported value held$202.92M
Funds holding (latest)40
SectorTechnology
Funds holding (Q2 2026)31
Institutional value$176.14M · 78.03M sh
New / Add / Cut / Exit3 / 18 / 7 / 0
Top-5 / Top-10 concentration87.5% / 94.8%
Institutional holdings change Accumulating +226.3% (+54.11M sh)
Institutional value change Up +248.4%

As of Q2 2026, 31 SEC-registered investment managers reported holding RBBN (RIBBON COMMUNICATIONS INC) in their latest 13F filings, with a combined reported value of $176.14M across 78.03M shares. That is +226.3% by share count (+54.11M shares) versus the previous quarter, while reported value moved +248.4%. Ownership is concentrated: the five largest holders account for 87.5% of reported value and the top ten for 94.8%.

Compared with the prior quarter, 3 opened new positions, 18 added to existing stakes, 7 trimmed. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.

RBBN is classified in the Technology sector.

All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.

FundQuarterSharesValuePortfolio WeightChange
JPMorgan Chase & Co history Q2 2026 52.04M $115.54M 0.01% New
Vanguard Group history Q4 2025 7.83M $22.56M 0.00% Add
BlackRock Inc history Q2 2026 7.15M $16.72M 0.00% Add
Royce & Associates history Q2 2026 5.09M $11.91M 0.10% Add
Geode Capital Management history Q2 2026 2.49M $5.82M 0.00% Add
D. E. Shaw & Co history Q2 2026 1.79M $4.19M 0.00% Add
AQR Capital Management history Q2 2026 1.41M $3.30M 0.00% Add
Citadel Advisors history Q2 2026 1.27M $2.97M 0.00% Add
Arrowstreet Capital history Q2 2026 1.22M $2.84M 0.00% Hold
First Eagle Investment Management history Q4 2025 862.53K $2.48M 0.00% Reduce
Marshall Wace history Q2 2026 814.13K $1.91M 0.00% Add
Charles Schwab Investment Management history Q2 2026 800.16K $1.87M 0.00% Add
Northern Trust Corp history Q2 2026 749.82K $1.75M 0.00% Add
Millennium Management history Q2 2026 698.46K $1.63M 0.00% Add
Goldman Sachs Group history Q2 2026 415.43K $972.11K 0.00% Reduce
BNY Mellon history Q2 2026 379.80K $888.73K 0.00% Add
Morgan Stanley history Q2 2026 379.79K $888.71K 0.00% Reduce
Lazard Asset Management history Q3 2025 208.96K $794.03K 0.00% New
UBS Group AG history Q2 2026 306.87K $718.08K 0.00% Reduce
Bank of America Corp history Q2 2026 188.44K $440.94K 0.00% Reduce

View all 40 fund holders →

New Positions (Q2 2026)

Fully Exited (vs previous quarter)

No tracked fund fully exited this quarter.

Fund Position History — shares by quarter (top 20 funds)

FundQ3 2021Q4 2021Q1 2022Q2 2022Q3 2022Q4 2022Q1 2023Q2 2023Q3 2023Q4 2023Q1 2024Q2 2024Q3 2024Q4 2024Q1 2025Q2 2025Q3 2025Q4 2025Q1 2026Q2 2026
JPMorgan Chase & Co 49.95M 49.95M 49.95M 49.95M 51.60M 51.60M 51.60M 51.60M 51.60M 51.60M 52.04M 52.04M 52.04M 52.04M 52.04M 52.04M 50.29M 52.04M — 52.04M
BlackRock Inc — — — — — — — — — — — — 7.68M 7.79M 7.79M 7.74M 7.70M 7.67M 6.72M 7.15M
Royce & Associates — — — — — — 576.50K 1.05M 1.61M 1.84M 2.02M 2.15M 2.54M 2.80M 3.09M 3.67M 4.31M 4.61M 4.88M 5.09M
Geode Capital Management 1.71M 1.73M 1.80M 1.85M 1.42M 1.58M 1.64M 1.85M 1.92M 2.01M 2.04M 2.07M 2.10M 2.10M 2.13M 2.30M 2.31M 2.30M 2.41M 2.49M
D. E. Shaw & Co 406.92K 467.89K 959.29K 901.69K 886.79K 846.78K 967.31K 711.12K 533.64K 430.61K 362.06K 463.53K 384.50K 469.50K 416.69K 416.69K 588.89K 979.84K 1.54M 1.79M
AQR Capital Management — — 227.44K 315.43K 160.35K — — 99.01K 97.94K — — 41.76K — — 205.29K 225.10K 169.11K 491.47K 1.26M 1.41M
Citadel Advisors 16.11K 33.26K 248.94K 28.18K 25.59K 42.13K 576.63K 276.69K 70.25K 73.26K 82.90K 236.08K 86.36K 132.58K 14.10K — 55.55K 53.90K 592.79K 1.27M
Arrowstreet Capital 743.71K 361.69K 279.71K 430.37K 467.51K 467.51K 902.26K 1.07M 1.05M 624.35K 809.25K 725.27K 690.07K 589.76K 556.32K 483.17K 964.45K 1.03M 1.22M 1.22M
Marshall Wace — — 230.52K 104.65K — — — — — — — — — — — — 346.10K 173.70K 769.79K 814.13K
Charles Schwab Investment Management 716.29K 733.17K 768.14K 749.12K 526.13K 643.42K 621.40K 659.52K 681.50K 690.26K 694.31K 748.91K 762.89K 760.77K 747.78K 766.20K 769.49K 769.07K 708.16K 800.16K
Northern Trust Corp 821.85K 815.55K 796.32K 781.85K 699.91K 695.99K 660.69K 855.73K 852.84K 862.38K 762.58K 753.75K 771.70K 828.16K 806.94K 998.94K 998.11K 922.55K 705.86K 749.82K
Millennium Management — 48.75K 59.59K 345.94K 93.63K 340.75K 1.56M 184.25K 102.50K 68.03K 61.56K 36.52K 25.37K 11.45K 245.10K 830.15K — 54.31K 491.32K 698.46K
Goldman Sachs Group 102.63K 112.79K 113.75K 220.12K 144.35K 204.94K 518.25K 241.51K 267.16K 231.38K 187.04K 247.66K 370.63K 416.63K 357.34K 242.71K 424.16K 787.49K 744.75K 415.43K
BNY Mellon 338.04K 424.42K 431.59K 397.13K 416.14K 280.95K 276.33K 323.38K 320.22K 419.75K 402.56K 434.20K 365.17K 327.54K 319.54K 328.14K 335.75K 389.99K 377.36K 379.80K
Morgan Stanley 121.71K 348.87K 298.48K 354.65K 329.26K 233.50K 272.31K 236.65K 205.31K 387.56K 294.07K 281.05K 403.80K 443.41K 392.87K 256.97K 504.68K 392.39K 423.46K 379.79K
UBS Group AG 14.60K 37.91K 18.71K 1.97K 1.34K 27.64K 33.67K 64.39K 64.41K 104.98K 101.70K 89.74K 309.02K 644.16K 344.61K 410.29K 302.89K 332.97K 334.45K 306.87K
Bank of America Corp 43.28K 69.06K 30.66K 19.60K 22.20K 55.09K 97.43K 115.20K 139.49K 186.50K 129.78K 102.61K 97.89K 115.65K 321.06K 104.63K 90.49K 147.69K 208.23K 188.44K
Invesco Ltd 84.94K 72.14K 169.07K 205.76K 197.50K 224.25K 124.58K 127.80K 127.79K 125.72K 229.41K 263.80K 209.03K 209.81K 186.71K 169.40K 172.87K 168.91K 181.84K 162.67K
Two Sigma Investments 36.94K — 179.07K 169.00K 119.80K 345.55K 405.99K 139.12K 111.31K 45.85K 39.11K 33.81K 14.36K 14.49K — 20.81K 31.00K 16.98K — 102.19K
Franklin Resources — — — — — — — — — — 1.70M 1.82M 1.48M 1.30M 1.22M 1.09M 597.66K 71.20K 108.77K 92.55K

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