Shannon River Fund Management LLC — 13F holdings

Shannon River Fund Management LLC reported 37 holdings worth $1.12B in its 13F filing for Q2 2026, filed August 13, 2026. That's up 113.8% from $524M in Q1 2026, when it reported 28 holdings. Its 10 largest positions make up 49.6% of the portfolio.

Shannon River Fund Management LLC's largest positions in Q2 2026

  1. TSEM TOWER SEMICONDUCTOR LTD — $99.8M (8.9%) · cut 24%
  2. FLEX FLEX LTD — $61.6M (5.5%) · added 22%
  3. AMD ADVANCED MICRO DEVICES INC — $61.4M (5.5%) · new position
  4. IDCC INTERDIGITAL INC — $52.2M (4.7%) · added 241%
  5. CLS CELESTICA INC — $51.1M (4.6%) · added 162%
  6. COHR COHERENT CORP — $51.0M (4.6%) · added 47%
  7. HNGE HINGE HEALTH INC — $46.6M (4.2%) · added 35%
  8. EXTR EXTREME NETWORKS — $46.1M (4.1%) · added 8%
  9. KLIC KULICKE & SOFFA INDS INC — $44.8M (4.0%) · new position
  10. TWLO TWILIO INC — $41.5M (3.7%) · new position
  11. CIEN CIENA CORP — $39.9M (3.6%) · new position
  12. LYV LIVE NATION ENTERTAINMENT IN — $39.6M (3.5%) · cut 27%
  13. RMBS RAMBUS INC DEL — $38.7M (3.5%) · cut 13%
  14. QNT QUANTINUUM INC — $38.4M (3.4%) · new position
  15. UTI UNIVERSAL TECHNICAL INST INC — $38.1M (3.4%) · new position
  16. ABNB AIRBNB INC — $35.5M (3.2%) · unchanged
  17. TTWO TAKE-TWO INTERACTIVE SOFTWAR — $34.5M (3.1%) · new position
  18. OUST OUSTER INC — $28.1M (2.5%) · new position
  19. PDFS PDF SOLUTIONS INC — $26.2M (2.3%) · new position
  20. NOK NOKIA CORP — $25.3M (2.3%) · new position

What Shannon River Fund Management LLC bought in Q2 2026

22 new positions and 9 positions added to.

  1. AMD ADVANCED MICRO DEVICES INC — new position, about $61.4M
  2. KLIC KULICKE & SOFFA INDS INC — new position, about $44.8M
  3. TWLO TWILIO INC — new position, about $41.5M
  4. CIEN CIENA CORP — new position, about $39.9M
  5. QNT QUANTINUUM INC — new position, about $38.4M
  6. UTI UNIVERSAL TECHNICAL INST INC — new position, about $38.1M
  7. IDCC INTERDIGITAL INC — added, about $36.9M
  8. TTWO TAKE-TWO INTERACTIVE SOFTWAR — new position, about $34.5M
  9. CLS CELESTICA INC — added, about $31.5M
  10. OUST OUSTER INC — new position, about $28.1M

What Shannon River Fund Management LLC sold in Q2 2026

13 positions sold out and 3 reduced.

  1. MRVL MARVELL TECHNOLOGY INC — sold out, about $168M
  2. TSEM TOWER SEMICONDUCTOR LTD — cut 24%, about $31.6M
  3. LGN LEGENCE CORP — sold out, about $28.8M
  4. AXON AXON ENTERPRISE INC — sold out, about $26.6M
  5. ALAB ASTERA LABS INC — sold out, about $22.9M
  6. TOST TOAST INC — sold out, about $20.4M
  7. LYV LIVE NATION ENTERTAINMENT IN — cut 27%, about $14.3M
  8. RMBS RAMBUS INC DEL — cut 13%, about $5.59M

Shannon River Fund Management LLC portfolio value by quarter

What does Shannon River Fund Management LLC own?

Its largest positions in Q2 2026 were TSEM, FLEX, AMD, IDCC, CLS, out of 37 holdings worth $1.12B.

What did Shannon River Fund Management LLC buy last quarter?

In Q2 2026 it opened 22 new positions and added to 9; the largest buys were AMD, KLIC, TWLO.

What did Shannon River Fund Management LLC sell last quarter?

In Q2 2026 it sold out of 13 positions and reduced 3, including MRVL, LGN, AXON.