Shannon River Fund Management LLC
13F filer · CIK 1301050 · New York, NY
Summary
Shannon River Fund Management LLC reported $1.12B across 37 positions in its 13F for 2026 Q2, filed Aug 13, 2026. The largest holdings are TSEM (8.9%), FLEX (5.5%), AMD (5.5%). Versus 2026 Q1, leaving options aside, it opened 22 new positions, added to 12, trimmed 3 and sold out of 13.
Reported value$1.12B
Positions37
Report period2026 Q2
FiledAug 13, 2026
New positions22
Added12
Trimmed3
Sold out13
Top 25 holdings
By reported value, options listed separately · change vs 2026 Q1
Weight 8.9%Value $99.81MPrice $226.04Shares 383K -24.06%Since Jun 30 -13.28%
Weight 5.5%Value $61.56MPrice $113.04Shares 380K +22.05%Since Jun 30 -30.25%
Weight 5.5%Value $61.43MPrice $607.57Shares 106KSince Jun 30 +4.59%
Weight 4.7%Value $52.21MPrice $327.14Shares 184K +240.80%Since Jun 30 +15.54%
Weight 4.6%Value $51.06MPrice $366.47Shares 140K +161.64%Since Jun 30 +0.46%
Weight 4.6%Value $51.00MPrice $282.45Shares 129K +47.07%Since Jun 30 -28.40%
Weight 4.2%Value $46.58MPrice $92.45Shares 561K +34.53%Since Jun 30 +11.39%
Weight 4.1%Value $46.10MPrice $21.00Shares 1.42M +8.46%Since Jun 30 -35.13%
Weight 4.0%Value $44.78MPrice $91.68Shares 335KSince Jun 30 -31.46%
Weight 3.7%Value $41.54MPrice $286.98Shares 201KSince Jun 30 +39.09%
Weight 3.6%Value $39.88MPrice $354.92Shares 81KSince Jun 30 -27.65%
Weight 3.5%Value $39.56MPrice $171.89Shares 216K -26.62%Since Jun 30 -6.13%
Weight 3.5%Value $38.72MPrice $102.12Shares 292K -12.61%Since Jun 30 -23.07%
Weight 3.4%Value $38.37MPrice $49.11Shares 469KSince Jun 30 -39.92%
Weight 3.4%Value $38.07MPrice $18.47Shares 890KSince Jun 30 -56.82%
Weight 3.2%Value $35.47MPrice $156.96Shares 248K +0.34%Since Jun 30 +9.69%
Weight 3.1%Value $34.50MPrice $202.35Shares 138KSince Jun 30 -19.05%
Weight 2.5%Value $28.09MPrice $40.90Shares 449KSince Jun 30 -34.58%
Weight 2.3%Value $26.18MPrice $49.75Shares 370KSince Jun 30 -29.72%
Weight 2.3%Value $25.32MPrice $10.12Shares 1.91MSince Jun 30 -23.80%
Weight 2.0%Value $22.67MPrice $112.10Shares 220KSince Jun 30 +8.91%
Weight 2.0%Value $22.48MPrice $72.19Shares 221KSince Jun 30 -28.98%
Weight 1.9%Value $21.32MPrice $435.56Shares 51K +2.12%Since Jun 30 +4.71%
Weight 1.8%Value $19.96MPrice $266.79Shares 39KSince Jun 30 -47.23%
Weight 1.5%Value $16.36MPrice $16.51Shares 668KSince Jun 30 -32.61%
| Stock | Weight | Value | Since Jun 30 | Shares change | Action |
|---|---|---|---|---|---|
| 8.9% | $99.81M | -13.28% | -24.06% | Trim | |
| 5.5% | $61.56M | -30.25% | +22.05% | Add | |
| 5.5% | $61.43M | +4.59% | — | New | |
| 4.7% | $52.21M | +15.54% | +240.80% | Add | |
| 4.6% | $51.06M | +0.46% | +161.64% | Add | |
| 4.6% | $51.00M | -28.40% | +47.07% | Add | |
| 4.2% | $46.58M | +11.39% | +34.53% | Add | |
| 4.1% | $46.10M | -35.13% | +8.46% | Add | |
| 4.0% | $44.78M | -31.46% | — | New | |
| 3.7% | $41.54M | +39.09% | — | New | |
| 3.6% | $39.88M | -27.65% | — | New | |
| 3.5% | $39.56M | -6.13% | -26.62% | Trim | |
| 3.5% | $38.72M | -23.07% | -12.61% | Trim | |
| 3.4% | $38.37M | -39.92% | — | New | |
| 3.4% | $38.07M | -56.82% | — | New | |
| 3.2% | $35.47M | +9.69% | +0.34% | Add | |
| 3.1% | $34.50M | -19.05% | — | New | |
| 2.5% | $28.09M | -34.58% | — | New | |
| 2.3% | $26.18M | -29.72% | — | New | |
| 2.3% | $25.32M | -23.80% | — | New | |
| 2.0% | $22.67M | +8.91% | — | New | |
| 2.0% | $22.48M | -28.98% | — | New | |
| 1.9% | $21.32M | +4.71% | +2.12% | Add | |
| 1.8% | $19.96M | -47.23% | — | New | |
| 1.5% | $16.36M | -32.61% | — | New |
Weight is the share of the reported 13F value, including options at notional value. “Since Jun 30” compares the latest close with the quarter-end price implied by the filing (value ÷ shares).
Largest buys in 2026 Q2
Largest sells in 2026 Q2
Source: SEC Form 13F, values as reported by the filer. Filings lag up to 45 days after quarter end and cover only certain long positions. Research only, not investment advice.