Shannon River Fund Management LLC
13F Reported Value
ⓘ$524.1M
Holdings
28
Latest Filing
2026-03-31
Filing Quarter
Q1 2026
Portfolio Overview
Shannon River Fund Management LLC disclosed 28 positions worth $524.1M in its Form 13F-HR for Q1 2026, led by $TSEM (TOWER SEMICONDUCTOR LTD) at 16.9% of the equity portfolio, followed by $MRVL and $LYV. During the quarter the fund opened 13 new positions and exited 11 — including a new stake in $ABNB and a full exit from $PEGA. The portfolio is most concentrated in Technology (76.7% of disclosed assets). All figures are sourced directly from Shannon River Fund Management LLC’s Form 13F-HR filing with the SEC under CIK 1301050.
AI Fund Analysis
ConcentratingSector Allocation
AUM History
Top Equity Holdings by Value
Quarterly Activity — Q1 2026
Click any card to unlockTop Holdings
- —
Quality
$88.5M504,239 sh - 77.3#88
Quality
$55.8M563,573 sh - 55.0#1,179
Quality
$44.9M294,398 sh - 70.1
Quality
$31.2M247,006 sh - 75.2
Quality
$28.7M333,817 sh - 64.0
Quality
$20.9M87,905 sh - —
Quality
$20.4M311,223 sh - 55.6
Quality
$20.1M47,442 sh - 52.0
Quality
$19.8M1,313,061 sh - 69.5
Quality
$19.4M732,027 sh
| Company | Quality | Value | Shares |
|---|---|---|---|
 TOWER SEMICONDUCTOR LTD$TSEM | — | $88.5M | 504,239 |
 Marvell Technology, Inc.$MRVL | 77.3#88 | $55.8M | 563,573 |
 Live Nation Entertainment, Inc.$LYV | 55.0#1,179 | $44.9M | 294,398 |
 Airbnb, Inc.$ABNB | 70.1 | $31.2M | 247,006 |
 RAMBUS INC$RMBS | 75.2 | $28.7M | 333,817 |
 COHERENT CORP.$COHR | 64.0 | $20.9M | 87,905 |
 FLEX LTD.$FLEX | — | $20.4M | 311,223 |
 AXON ENTERPRISE, INC.$AXON | 55.6 | $20.1M | 47,442 |
 EXTREME NETWORKS INC$EXTR | 52.0 | $19.8M | 1,313,061 |
 Toast, Inc.$TOST | 69.5 | $19.4M | 732,027 |
Unlock AI quality scores for every holding
32-signal composite ranking on each of Shannon River Fund Management LLC's 28 positions.
Showing top 10 of 28 holdings.
Sector Allocation
Technology
$401.7M
Communication Services
$63.5M
Industrials
$39.2M
Real Estate
$10.4M
Materials
$9.3M
Full Holdings — Shannon River Fund Management LLC (Q1 2026)
All 28 disclosed positions from the latest Form 13F-HR, with quarter-over-quarter share changes and 13F Pro quality scores. Sourced from SEC EDGAR.
| # | Ticker | Company | Value | Weight | QoQ | Quality |
|---|---|---|---|---|---|---|
| 1 | $TSEM | TOWER SEMICONDUCTOR LTD | $88.5M | 16.9% | -16% | — |
| 2 | $MRVL | Marvell Technology, Inc. | $55.8M | 10.7% | +49% | 77.3 |
| 3 | $LYV | Live Nation Entertainment, Inc. | $44.9M | 8.6% | +15% | 55 |
| 4 | $ABNB | Airbnb, Inc. | $31.2M | 6.0% | NEW | 70.1 |
| 5 | $RMBS | RAMBUS INC | $28.7M | 5.5% | NEW | 75.2 |
| 6 | $COHR | COHERENT CORP. | $20.9M | 4.0% | -48% | 64 |
| 7 | $FLEX | FLEX LTD. | $20.4M | 3.9% | -1% | — |
| 8 | $AXON | AXON ENTERPRISE, INC. | $20.1M | 3.8% | +129% | 55.6 |
| 9 | $EXTR | EXTREME NETWORKS INC | $19.8M | 3.8% | -31% | 52 |
| 10 | $TOST | Toast, Inc. | $19.4M | 3.7% | NEW | 69.5 |
| 11 |  $LGN | Legence Corp. | $19.1M | 3.6% | +1% | — |
| 12 |  $IDCC | InterDigital, Inc. | $16.3M | 3.1% | +1% | 76.2 |
| 13 |  $HNGE | Hinge Health, Inc. | $16.1M | 3.1% | +79% | 44.9 |
| 14 |  $ADTN | ADTRAN Holdings, Inc. | $15.3M | 2.9% | NEW | 41.6 |
| 15 |  $CLS | CELESTICA INC | $15.1M | 2.9% | -50% | 69 |
| 16 |  $FFIV | F5, INC. | $14.5M | 2.8% | NEW | 70 |
| 17 |  $LION | Lionsgate Studios Corp. | $10.0M | 1.9% | NEW | 46.5 |
| 18 |  $GWRE | Guidewire Software, Inc. | $9.4M | 1.8% | -50% | 66.2 |
| 19 |  $UUUU | ENERGY FUELS INC | $9.3M | 1.8% | NEW | 27 |
| 20 |  $SPHR | Sphere Entertainment Co. | $8.6M | 1.6% | NEW | 50.3 |
| 21 |  $AMBA | AMBARELLA INC | $5.9M | 1.1% | -62% | 38.5 |
| 22 |  $APP | AppLovin Corp | $5.8M | 1.1% | NEW | 86.8 |
| 23 |  $DLR | DIGITAL REALTY TRUST, INC. | $5.4M | 1.0% | NEW | 70.2 |
| 24 |  $ALAB | Astera Labs, Inc. | $5.2M | 1.0% | -72% | 77.7 |
| 25 |  $OSIS | OSI SYSTEMS INC | $5.1M | 1.0% | NEW | 64.1 |
| 26 |  $EQIX | EQUINIX INC | $5.0M | 0.9% | NEW | 61.4 |
| 27 |  $PLTR | Palantir Technologies Inc. | $4.3M | 0.8% | +1% | 85.8 |
| 28 |  $SNOW | Snowflake Inc. | $4.0M | 0.8% | NEW | 49.6 |
New Positions (13)
$ABNB Airbnb, Inc.$31.2M$RMBS RAMBUS INC$28.7M$TOST Toast, Inc.$19.4M$ADTN ADTRAN Holdings, Inc.$15.3M$FFIV F5, INC.$14.5M$LION Lionsgate Studios Corp.$10.0M$UUUU ENERGY FUELS INC$9.3M$SPHR Sphere Entertainment Co.$8.6M$APP AppLovin Corp$5.8M$DLR DIGITAL REALTY TRUST, INC.$5.4M$OSIS OSI SYSTEMS INC$5.1M$EQIX EQUINIX INC$5.0M$SNOW Snowflake Inc.$4.0MExited Positions (11)
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