137 tracked 13F filers disclose a position in RBBN as of the latest SEC 13F filings, a combined $242.0M in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | JPMORGAN CHASE & CO | $108.0M | 52.0M | ▲~0% Added · +5K sh | Q1 2026 | |
| 2 | Neuberger Berman Group LLC | $33.2M | 17.4M | ▼−0.4% Reduced · −69K sh | Q1 2026 | |
| 3 | BlackRock, Inc. | $14.3M | 6.7M | ▼−12% Reduced · −942K sh | Q1 2026 | |
| 4 | DIMENSIONAL FUND ADVISORS LP | $13.5M | 6.4M | ▼−1.9% Reduced · −124K sh | Q1 2026 | |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | $8.9M | 4.2M | →First observed position No prior filed position | Q1 2026 | |
| 6 | VANGUARD PORTFOLIO MANAGEMENT LLC | $7.1M | 3.3M | →First observed position No prior filed position | Q1 2026 | |
| 7 | PARADIGM CAPITAL MANAGEMENT INC/NY | $7.1M | 3.0M | ▼−62% Reduced · −5.0M sh | Q2 2026 | |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $5.8M | 2.5M | ▲+2.9% Added · +71K sh | Q2 2026 | |
| 9 | Connor, Clark & Lunn Investment Management Ltd. | $5.2M | 2.2M | ▲+5.9% Added · +123K sh | Q2 2026 | |
| 10 | STATE STREET CORP | $4.5M | 1.9M | ▲+1.1% Added · +20K sh | Q2 2026 | |
| 11 | D. E. Shaw & Co., Inc. | $3.3M | 1.5M | ▲+57% Added · +559K sh | Q1 2026 | |
| 12 | AQR CAPITAL MANAGEMENT LLC | $2.7M | 1.3M | ▲+156% Added · +766K sh | Q1 2026 | |
| 13 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $2.6M | 1.2M | ▲+18% Added · +187K sh | Q1 2026 | |
| 14 | MARSHALL WACE, LLP | $1.6M | 770K | ▲+343% Added · +596K sh | Q1 2026 | |
| 15 | GOLDMAN SACHS GROUP INC | $1.6M | 745K | ▼−5.4% Reduced · −43K sh | Q1 2026 | |
| 16 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $1.5M | 708K | ▼−7.9% Reduced · −61K sh | Q1 2026 | |
| 17 | NORTHERN TRUST CORP | $1.5M | 706K | ▼−23% Reduced · −217K sh | Q1 2026 | |
| 18 | JACOBS LEVY EQUITY MANAGEMENT, INC | $1.5M | 685K | ▼−23% Reduced · −205K sh | Q1 2026 | |
| 19 | VANGUARD FIDUCIARY TRUST CO | $1.2M | 587K | →First observed position No prior filed position | Q1 2026 | |
| 20 | CITADEL ADVISORS LLC | $1.2M | 575K | ▲11× Added · +521K sh | Q1 2026 | |
| 21 | MILLENNIUM MANAGEMENT LLC | $1.0M | 491K | ▲+805% Added · +437K sh | Q1 2026 | |
| 22 | MORGAN STANLEY | $898K | 423K | ▲+7.9% Added · +31K sh | Q1 2026 | |
| 23 | VICTORY CAPITAL MANAGEMENT INC | $895K | 422K | ▲+21% Added · +73K sh | Q1 2026 | |
| 24 | Silverberg Bernstein Capital Management LLC | $980K | 419K | ▼−4.4% Reduced · −19K sh | Q2 2026 | |
| 25 | Bank of New York Mellon Corp | $800K | 377K | ▼−3.2% Reduced · −13K sh | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
Last quarter, 3 funds opened a new position in RBBN and 21 added to an existing one, while 15 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 60 funds | $157.9B |
| ALPHABET INC-CL AGOOGL | 60 funds | $89.3B |
| JPMORGAN CHASE & COJPM | 59 funds | $34.3B |
| NVIDIA CORPNVDA | 58 funds | $223.0B |
| AMAZON.COM INCAMZN | 58 funds | $112.6B |
| ALPHABET INC-CL CGOOG | 58 funds | $77.2B |
| META PLATFORMS INC-CLASS AMETA | 58 funds | $62.2B |
| VISA INC-CLASS A SHARESV | 58 funds | $34.9B |
| COSTCO WHOLESALE CORPCOST | 58 funds | $21.0B |
| MCKESSON CORPMCK | 58 funds | $10.3B |
| BRISTOL-MYERS SQUIBB COBMY | 58 funds | $7.4B |
| APPLE INCAAPL | 57 funds | $169.2B |
Ranked by how many of RBBN's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Feb 13, 2026 | McClelland Bruce William | President & CEO, Director | Buy (P) | 13K | $25K |
| Feb 11, 2026 | McClelland Bruce William | President & CEO, Director | Buy (P) | 13K | $25K |
| Feb 10, 2026 | McClelland Bruce William | President & CEO, Director | Buy (P) | 12K | $25K |
| Sep 8, 2025 | Redington Dan | EVP, Global Sales | Sell (S) | 14K | $57K |
| Sep 5, 2025 | Redington Dan | EVP, Global Sales | Sell (S) | 155K | $626K |
| Sep 5, 2025 | INFANTE BEATRIZ V | Director | Sell (S) | 9K | $35K |
| Sep 4, 2025 | Redington Dan | EVP, Global Sales | Sell (S) | 20K | $83K |
| Apr 9, 2025 | JPMORGAN CHASE & CO | 10% Owner | Buy (P) | 14 | $51 |
| Apr 9, 2025 | JPMORGAN CHASE & CO | 10% Owner | Sell (S) | 14 | $0 |
| Sep 13, 2024 | INFANTE BEATRIZ V | Director | Sell (S) | 6K | $18K |
| Mar 15, 2024 | GRAYSON BRUNS H | Director | Buy (P) | 100K | $289K |
| Mar 15, 2024 | LOPEZ MIGUEL A | EVP, CFO | Buy (P) | 2K | $6K |
Connected entities for RBBN
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/RBBN/capital-change-brief"
Use Arkolith's capital_change_brief for RBBN. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for RBBN. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.