Shannon River Fund Management LLC: 13F holdings, Q2 2026
Hedge fund · SEC EDGAR filings (CIK 1301050) · Explore on the interactive board
Shannon River Fund Management LLC disclosed 37 US equity positions worth $1.1bn in its Q2 2026 13F filing (holdings as of June 30, 2026, filed August 13, 2026). Its largest position is TSEM at 8.9% of the reported book, followed by FLEX, AMD. The top ten holdings are 49.6% of the book, and the portfolio behaves like about 26 equal-weight positions. Versus the prior filing it opened 22 new positions, added to 11, reduced 3 and exited 13. Note: this manager's most recent filing is 3934 quarters behind the newest quarter on file, so these figures are history rather than current positioning.
What does Shannon River Fund Management LLC own? Top holdings as of June 30, 2026
Change is measured in shares against the previous filing (Q1 2026), so price moves do not read as decisions. This quarter: 22 new, 11 added, 3 reduced, 13 exited.
| # | Stock | Sector | Weight | Value | Shares | Δ shares | Action |
|---|---|---|---|---|---|---|---|
| 1 | TSEM TOWER SEMICONDUCTOR LTD | Technology | 8.9% | $99.8m | 382,933 | -24% | reduced |
| 2 | FLEX FLEX LTD | Technology | 5.5% | $61.6m | 379,834 | 22% | added |
| 3 | AMD ADVANCED MICRO DEVICES INC | Technology | 5.5% | $61.4m | 105,751 | – | new |
| 4 | IDCC INTERDIGITAL INC | Technology | 4.7% | $52.2m | 184,388 | 241% | added |
| 5 | CLS CELESTICA INC | Technology | 4.6% | $51.1m | 139,964 | 162% | added |
| 6 | COHR COHERENT CORP | Technology | 4.6% | $51.0m | 129,283 | 47% | added |
| 7 | HNGE HINGE HEALTH INC | Healthcare | 4.2% | $46.6m | 561,224 | 35% | added |
| 8 | EXTR EXTREME NETWORKS INC | Technology | 4.1% | $46.1m | 1,424,095 | 8% | added |
| 9 | KLIC KULICKE & SOFFA INDS INC | Technology | 4.0% | $44.8m | 334,781 | – | new |
| 10 | TWLO TWILIO INC | Technology | 3.7% | $41.5m | 201,352 | – | new |
| 11 | CIEN CIENA CORP | Technology | 3.6% | $39.9m | 81,298 | – | new |
| 12 | LYV LIVE NATION ENTERTAINMENT IN | Communication Services | 3.5% | $39.6m | 216,037 | -27% | reduced |
| 13 | RMBS RAMBUS INC DEL | Technology | 3.5% | $38.7m | 291,713 | -13% | reduced |
| 14 | QUANTINUUM INC | 3.4% | $38.4m | 469,355 | – | new | |
| 15 | UTI UNIVERSAL TECHNICAL INST INC | Consumer Defensive | 3.4% | $38.1m | 890,113 | – | new |
| 16 | ABNB AIRBNB INC | Consumer Cyclical | 3.2% | $35.5m | 247,836 | 0% | held |
| 17 | TTWO TAKE-TWO INTERACTIVE SOFTWAR | Communication Services | 3.1% | $34.5m | 138,029 | – | new |
| 18 | OUST OUSTER INC | Technology | 2.5% | $28.1m | 449,264 | – | new |
| 19 | PDFS PDF SOLUTIONS INC | Technology | 2.3% | $26.2m | 369,776 | – | new |
| 20 | NOK NOKIA CORP | Technology | 2.3% | $25.3m | 1,906,902 | – | new |
| 21 | ALNT ALLIENT INC | Technology | 2.0% | $22.7m | 220,237 | – | new |
| 22 | RKLB ROCKET LAB CORP | Industrials | 2.0% | $22.5m | 221,143 | – | new |
| 23 | FFIV F5 INC | Technology | 1.9% | $21.3m | 51,258 | 2% | added |
| 24 | DY DYCOM INDS INC | Industrials | 1.8% | $20.0m | 39,473 | – | new |
| 25 | CIFR CIPHER DIGITAL INC | Technology | 1.5% | $16.4m | 667,931 | – | new |
| 26 | LION LIONSGATE STUDIOS CORP | 1.4% | $16.1m | 1,050,445 | 1% | added | |
| 27 | DLR DIGITAL RLTY TR INC | Real Estate | 1.4% | $15.9m | 88,764 | 197% | added |
| 28 | GWRE GUIDEWIRE SOFTWARE INC | Technology | 1.2% | $13.9m | 113,230 | 80% | added |
| 29 | SPHR SPHERE ENTERTAINMENT CO | Communication Services | 1.1% | $12.8m | 73,878 | 1% | added |
| 30 | GLBE GLOBAL-E ONLINE LTD | Consumer Cyclical | 1.1% | $12.3m | 353,200 | – | new |
| 31 | AMPX AMPRIUS TECHNOLOGIES INC | Industrials | 1.0% | $11.6m | 838,887 | – | new |
| 32 | APLD APPLIED DIGITAL CORP | Technology | 0.9% | $9.9m | 265,474 | – | new |
| 33 | NET CLOUDFLARE INC | Technology | 0.5% | $5.8m | 23,589 | – | new |
| 34 | AMKR AMKOR TECHNOLOGY INC | Technology | 0.5% | $5.7m | 65,895 | – | new |
| 35 | MU MICRON TECHNOLOGY INC | Technology | 0.5% | $5.2m | 4,484 | – | new |
| 36 | BW BABCOCK & WILCOX ENTERPRISES | 0.4% | $4.7m | 333,153 | – | new | |
| 37 | MXL MAXLINEAR INC | Technology | 0.3% | $3.5m | 27,377 | – | new |
What did Shannon River Fund Management LLC sell? Positions exited since the previous filing
| Stock | Prior weight | Prior value |
|---|---|---|
| MRVL MARVELL TECHNOLOGY INC | 32.0% | $55.8m |
| AXON AXON ENTERPRISE INC | 11.6% | $20.1m |
| TOST TOAST INC | 11.1% | $19.4m |
| LGN LEGENCE CORP | 10.9% | $19.1m |
| ADTN ADTRAN HOLDINGS INC | 8.8% | $15.3m |
| UUUU ENERGY FUELS INC | 5.3% | $9.3m |
| AMBA AMBARELLA INC | 3.4% | $5.9m |
| APP APPLOVIN CORP | 3.3% | $5.8m |
| ALAB ASTERA LABS INC | 3.0% | $5.2m |
| OSIS OSI SYSTEMS INC | 2.9% | $5.1m |
| EQIX EQUINIX INC | 2.9% | $5.0m |
| PLTR PALANTIR TECHNOLOGIES INC | 2.4% | $4.3m |
| SNOW SNOWFLAKE INC | 2.3% | $4.0m |
Sector mix
| Sector | Weight |
|---|---|
| Technology | 68.9% |
| Communication Services | 7.8% |
| Industrials | 4.8% |
| Consumer Cyclical | 4.3% |
| Healthcare | 4.2% |
| Consumer Defensive | 3.4% |
Sectors cover positions whose ticker resolved to a sector; the remainder is unclassified, not cash.
Filing history
How concentrated is Shannon River Fund Management LLC's portfolio?
Across every quarter Shannon River Fund Management LLC has filed, its median largest position is 12.9% of the book and its median top-ten weight is 58.2%, which WhaleCreep classifies as concentrated (the gate is a median largest position of 5%). Of 13.0 completed holding spells, the median lasted 1.0 quarters; 37.0 positions are still open and their final length is unknown.