Cambium Networks Corporation
Cambium Networks Corporation (CMBM) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · CMBM · as of Sep 30, 2025
Ownership Breakdown
35
Institutional Holders
▼ 1 vs Q2
$16.22M
Total Inst. Value
▲ $8.95M vs Q2
28.24M
Shares Outstanding
freeFloat 48.69%
18.11M
13F Shares Held
▲ 155,447 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
CMBM largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VECTOR CAPITAL MANAGEMENT, L.P. radio & tv broadcasting & communications equipment | 14.33M | 52.06% | 52.06% | $12.81B | Nov 14, 2025 | — held |
AMH EQUITY LTD radio & tv broadcasting & communications equipment | 800.0K | 2.91% | 2.91% | $715.44M | Oct 29, 2025 | ▼ 2.4K |
RENAISSANCE TECHNOLOGIES LLC radio & tv broadcasting & communications equipment | 488.0K | 1.77% | 1.77% | $436.41M | Nov 13, 2025 | ▲ 201.6K |
PARADIGM CAPITAL MANAGEMENT INC/NY radio & tv broadcasting & communications equipment | 466.9K | 1.70% | 1.70% | $417.55M | Nov 14, 2025 | — held |
TWO SIGMA ADVISERS, LP radio & tv broadcasting & communications equipment | 444.2K | 1.61% | 1.61% | $397.25M | Nov 14, 2025 | ▲ 141.0K |
TWO SIGMA INVESTMENTS, LP radio & tv broadcasting & communications equipment | 361.1K | 1.31% | 1.31% | $322.92M | Nov 14, 2025 | ▼ 21.5K |
RBF CAPITAL, LLC radio & tv broadcasting & communications equipment | 207.3K | 75.33% | 75.33% | $185.39M | Nov 14, 2025 | — held |
GSA CAPITAL PARTNERS LLP radio & tv broadcasting & communications equipment | 182.7K | 66.40% | 66.40% | $163.00M | Nov 7, 2025 | ▲ 18.4K |
VANGUARD GROUP INC radio & tv broadcasting & communications equipment | 165.9K | 60.27% | 60.27% | $148.29M | Nov 7, 2025 | ▲ 5.5K |
BLACKROCK, INC. radio & tv broadcasting & communications equipment | 155.3K | 56.43% | 56.43% | $138.87M | Nov 12, 2025 | ▼ 16.4K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
15
Increased
+521.1K shares0
New Positions
first time holders8
Decreased
−113.6K shares5
Sold Out
fully exitedNet shares change (top 50)
+407.5K
+521.1K / −113.6K
Net new holders
+2
0 new / 5 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
CMBM insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
0
Buy transactions
2
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Cada-Bartoli Melissa Elizabeth Global Controller and CAO | Feb 27, 2026 | Tax Withhold | 59 | $1.12 | $66.08 | 6.4K | Form 4 ↗ |
Kurk Morgan C S President and CEO | Feb 18, 2026 | Tax Withhold | 2,109 | $1.21 | $2.6K | 86.0K | Form 4 ↗ |
Vivek Vibhu Senior VP, Products | Jan 10, 2026 | Tax Withhold | 895 | $1.49 | $1.3K | 115.5K | Form 4 ↗ |
Cada-Bartoli Melissa Elizabeth Global Controller and CAO | Dec 1, 2025 | Tax Withhold | 50 | $1.83 | $91.5 | 6.4K | Form 4 ↗ |
Kurk Morgan C S President and CEO | Nov 18, 2025 | Tax Withhold | 1,788 | $2.61 | $4.7K | 88.1K | Form 4 ↗ |
Vivek Vibhu Senior VP, Products | Oct 10, 2025 | Tax Withhold | 895 | $0.77 | $686.465 | 116.4K | Form 4 ↗ |
Cada-Bartoli Melissa Elizabeth Global Controller and CAO | Sep 1, 2025 | Tax Withhold | 48 | $0.76 | $36.442 | 6.5K | Form 4 ↗ |
Kurk Morgan C S President and CEO | Aug 18, 2025 | Tax Withhold | 14,300 | $0.69 | $9.8K | 89.9K | Form 4 ↗ |
Sayer Jacob Chief Financial Officer | Aug 15, 2025 | Tax Withhold | 550 | $0.70 | $384.45 | 26.9K | Form 4 ↗ |
Vivek Vibhu Senior VP, Products | Jul 10, 2025 | Tax Withhold | 3,579 | $0.44 | $1.6K | 117.3K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Cambium Networks Corporation (CMBM) is primarily owned by institutional investors, who hold approximately 64.1% of total shares outstanding. Company insiders own approximately 51.31%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Cambium Networks Corporation is VECTOR CAPITAL MANAGEMENT, L.P., holding approximately 14.33 million shares — equal to 52.06% of outstanding shares — as of September 30, 2025.
A total of 35 institutional investors currently hold CMBM stock, with a combined institutional value of approximately $16,220,702 as of the most recent 13F filing period.
Frequently asked questions
CMBM ownershipCambium Networks Corporation (CMBM) is primarily owned by institutional investors, who hold approximately 64.1% of shares. The largest shareholder is VECTOR CAPITAL MANAGEMENT, L.P. with a 52.06% stake. Company insiders hold 51.31%. Data sourced from SEC Form 13F as of September 30, 2025.