Tucows Inc /Pa/ (Nasdaq: TCX), an SEC filer in Services-Computer Processing & Data Preparation, closed at $10.12, +1.5%, on 2026-08-28, with a market cap of $111M as of 2026-08-27, a net margin of -19.4% and 3-year sales growth of 6.7%. Institutional ownership, earnings history and filed financials are on the tabs below.
| # | Holder | Shares | Value | % of shares out | Δ QoQ |
|---|---|---|---|---|---|
| 1 | EdgePoint Investment Group Inc. | 2,118,5752.1M | $36M | 19.04% | — |
| 2 | Blacksheep Fund Management Ltd | 1,091,9851.1M | $19M | 9.81% | — |
| 3 | Universal- Beteiligungs- und Servicegesellschaft mbH | 533,873533,873 | $9M | 4.80% | — |
| 4 | BlackRock, Inc. | 516,163516,163 | $9M | 4.64% | — |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 361,244361,244 | $6M | 3.25% | NEW† |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | 198,550198,550 | $3M | 1.78% | ADD 7% |
| 7 | STATE STREET CORP | 184,484184,484 | $3M | 1.66% | ADD 2% |
| 8 | Baader Bank Aktiengesellschaft | 163,270163,270 | $3M | 1.47% | — |
| 9 | RENAISSANCE TECHNOLOGIES LLC | 135,851135,851 | $2M | 1.22% | TRIM -3% |
| 10 | Russell Investments Group, Ltd. | 112,390112,390 | $2M | 1.01% | ADD 11706% |
† NEW this big is usually a rename.
Ranked by each filer’s own reported value, not shares.
| Biggest buyers | Δ shares | Δ value | |
|---|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC | +361,244 | $6M | OPEN |
| Russell Investments Group, Ltd. | +111,438 | $2M | ADD |
| VANGUARD FIDUCIARY TRUST CO | +55,384 | $950,389 | OPEN |
| VANGUARD PORTFOLIO MANAGEMENT LLC | +39,208 | $672,809 | OPEN |
| GEODE CAPITAL MANAGEMENT, LLC | +13,544 | $232,415 | ADD |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| VANGUARD GROUP INC | −464,026 | $8M | CLOSE |
| JANE STREET GROUP, LLC | −36,649 | $628,897 | CLOSE |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | −28,674 | $492,046 | TRIM |
| CITADEL ADVISORS LLC | −15,078 | $258,738 | TRIM |
| TWO SIGMA INVESTMENTS, LP | −12,714 | $218,172 | CLOSE |
Prior quarter split-rebased · 13Fs are long, US-listed only.
| Holder | 2024-Q4 | 2025-Q1 | 2025-Q2 | 2025-Q3 | 2025-Q4 | 2026-Q1 | Latest value |
|---|---|---|---|---|---|---|---|
| EdgePoint Investment Group Inc. | 2.1M | 2.1M | 2.1M | 2.1M | 2.1M | 2.1M | $36M |
| Blacksheep Fund Management Ltd | 904K | 1.1M | 1.1M | 1.1M | 1.1M | 1.1M | $19M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | — | 511K | 511K | 511K | 527K | 534K | $9M |
| BlackRock, Inc. | 589K | 577K | 530K | 524K | 523K | 516K | $9M |
| VANGUARD CAPITAL MANAGEMENT LLC | — | — | — | — | — | 361K | $6M |
| GEODE CAPITAL MANAGEMENT, LLC | 202K | 205K | 195K | 185K | 185K | 199K | $3M |
| STATE STREET CORP | 195K | 184K | 182K | 181K | 180K | 184K | $3M |
| Baader Bank Aktiengesellschaft | 163K | 163K | 163K | 163K | 163K | 163K | $3M |
| RENAISSANCE TECHNOLOGIES LLC | 156K | 153K | 148K | 146K | 140K | 136K | $2M |
| Russell Investments Group, Ltd. | 24 | 44 | 386 | 4K | 952 | 112K | $2M |
Green = added, red = trimmed, grey = held; a dash is a quarter with no 13F on file — a gap, not an exit.
Breaks = no 13F that quarter.
Short interest has its own tab now — open SI →
SEC Form 13F · ~10,250 filers, 10y · long-only, US-listed, filed ≤45d after quarter-end.
SEC Schedule 13D/G XML · group aggregate.
