Silverberg Bernstein Capital Management LLC RBBN — RIBBON COMMUNICATIONS INC

Ownership history in Silverberg Bernstein Capital Management LLC  ·  10 quarters on record

AI Ownership Summary

Silverberg Bernstein Capital Management LLC reported RIBBON COMMUNICATIONS INC (RBBN) in 10 quarterly 13F filings from 2023 Q4 through 2026 Q1. Peak portfolio weight reached 1.25% in 2024 Q2. The latest visible filing shows RBBN at 0.51% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings.

What this RBBN ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Silverberg Bernstein Capital Management LLC's position in RIBBON COMMUNICATIONS INC, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2026 Q1

RBBN was reported at 0.51% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
1.25% in 2024 Q2

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2023 Q4 to 2026 Q1

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

RBBN stock page Silverberg Bernstein Capital Management LLC fund profile Silverberg Bernstein Capital Management LLC full holdings
How Silverberg Bernstein Capital Management LLC held RBBN — position size vs. price
% of Fund (quarterly)    RBBN price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 10 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 ADDED — — — 438,123 +2,100 +0.5% 0.51% $929K 2026-04-16 $2.71
2025 Q4 ADDED — — — 436,023 +8,044 +1.9% 0.73% $1.3M 2026-01-12 $2.81
2025 Q3 ADDED — — — 427,979 +35,400 +9.0% 0.99% $1.6M 2025-10-07 $3.76
2025 Q2 ADDED — — — 392,579 +98,996 +33.7% 1.08% $1.6M 2025-07-09 $4.07
2025 Q1 REDUCED 7.1% +2.3% ❌ 293,583 -22,527 -7.1% 1.07% $1.2M 2025-04-10 $3.46
2024 Q4 REDUCED 13.6% -5.8% ✅ 316,110 -49,900 -13.6% 1.16% $1.3M 2025-01-14 $3.99
2024 Q3 REDUCED 6.6% +27.7% ❌ 366,010 -26,001 -6.6% 1.09% $1.2M 2024-10-04 $3.28
2024 Q2 REDUCED — — — 392,011 -4,600 -1.2% 1.25% $1.3M 2024-07-12 $3.71
2024 Q1 REDUCED — — — 396,611 -8,982 -2.2% 1.24% $1.3M 2024-04-11 $2.80
2023 Q4 INITIATED — — — 405,593 — — 1.12% $1.2M 2024-01-17 $2.84

🏢 Other funds also holding RBBN

As of 2026 Q1 — sorted by position size

FIRST WILSHIRE SECURITIES MANAGEMENT INC 3Y 7Y 0.67% PARADIGM CAPITAL MANAGEMENT INC/NY 3Y 7Y 0.65% Pacific Ridge Capital Partners, LLC 3Y 7Y 0.11% ROYCE & ASSOCIATES LP 3Y 7Y 0.1% EntryPoint Capital, LLC 0.09% GSA CAPITAL PARTNERS LLP 3Y 7Y 0.04% HERALD INVESTMENT MANAGEMENT Ltd 3Y 7Y 0.03% Neuberger Berman Group LLC 3Y 7Y 0.03% SEVEN MILE ADVISORY 0.02% Dynamic Technology Lab Private Ltd 3Y 7Y 0.02%

FAQ About Silverberg Bernstein Capital Management LLC and RBBN

These are the practical questions this page is built to answer before you even open the full history table.

How long has Silverberg Bernstein Capital Management LLC reported owning RBBN?

Silverberg Bernstein Capital Management LLC reported RBBN across 10 quarterly 13F filings, from 2023 Q4 through 2026 Q1.

What was the largest reported RBBN position in Silverberg Bernstein Capital Management LLC's portfolio?

The largest reported portfolio weight for RBBN was 1.25% in 2024 Q2.

What is the latest reported RBBN position on this page?

The most recent filing on this page is 2026 Q1, when Silverberg Bernstein Capital Management LLC reported 438,123 shares, equal to 0.51% of portfolio, with an estimated market value of $929K.

What does the chart on this RBBN ownership page compare?

The chart compares Silverberg Bernstein Capital Management LLC's quarterly RBBN portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

How well did Silverberg Bernstein Capital Management LLC time their RBBN position?

Based on 13F filing dates vs. subsequent RBBN price moves, Silverberg Bernstein Capital Management LLC correctly timed 2 out of 9 reported position changes (22%). The annualised alpha on RBBN relative to SPY over the holding period was -18.9%.

← Back to Silverberg Bernstein Capital Management LLC Holdings