Shannon River Fund Management LLC
Spencer Waxman New York, NY 20 13Fs · since 2021 Q3
- AUM $524M
- positions 28
- period 2026 Q1
- QoQ −17.9%
- top 5 47.6%
- qoq N 13 E 11 A 6 R 8
- TOWER SEMICONDUCTOR LTD 16.9%
- MARVELL TECHNOLOGY INC - MRVL 10.6%
- LIVE NATION ENTERTAINMENT IN - LYV 8.6%
- AIRBNB INC - ABNB 6.0%
- RAMBUS INC DEL 5.5%
- COHERENT CORP - COHR 4.0%
- FLEXTRONICS INTL LTD - FLEX 3.9%
- AXON ENTERPRISE INC - AXON 3.8%
- EXTREME NETWORKS 3.8%
- TOAST INC - TOST 3.7%
- LEGENCE CORP 3.6%
- INTERDIGITAL INC 3.1%
- Other 26.5%
AUM over time
Holdings value
2026 Q1
$524M
−17.9% QoQ
Latest book
| TOWER SEMICONDUCTOR LTD | 16.88% | Reduce −16.4% | 504,239 | $175.48 | $88M | −98,565 | +$18M |
| MARVELL TECHNOLOGY INC - MRVL | 10.65% | Add +49.2% | 563,573 | $99.05 | $56M | +185,889 | +$24M |
| LIVE NATION ENTERTAINMENT IN - LYV | 8.57% | Add +15.3% | 294,398 | $152.51 | $45M | +38,965 | +$8M |
| AIRBNB INC - ABNB | 5.95% | New | 247,006 | $126.28 | $31M | +247,006 | +$31M |
| RAMBUS INC DEL | 5.48% | New | 333,817 | $86.03 | $29M | +333,817 | +$29M |
| COHERENT CORP - COHR | 4.00% | Reduce −47.7% | 87,905 | $238.21 | $21M | −80,013 | −$10M |
| FLEXTRONICS INTL LTD - FLEX | 3.89% | Reduce −0.7% | 311,223 | $65.46 | $20M | −2,050 | +$1M |
| AXON ENTERPRISE INC - AXON | 3.84% | Add +129.0% | 47,442 | $424.69 | $20M | +26,726 | +$8M |
| EXTREME NETWORKS | 3.78% | Reduce −31.1% | 1,313,061 | $15.08 | $20M | −591,467 | −$12M |
| TOAST INC - TOST | 3.70% | New | 732,027 | $26.51 | $19M | +732,027 | +$19M |
| LEGENCE CORP | 3.64% | Add +0.8% | 337,638 | $56.46 | $19M | +2,775 | +$5M |
| INTERDIGITAL INC | 3.12% | Add +1.1% | 54,104 | $302.00 | $16M | +614 | −$691 |
| HINGE HEALTH INC | 3.07% | Add +78.8% | 417,182 | $38.56 | $16M | +183,828 | +$5M |
| ADTRAN HOLDINGS INC - ADTN | 2.93% | New | 1,219,976 | $12.58 | $15M | +1,219,976 | +$15M |
| CELESTICA INC - CLS | 2.88% | Reduce −50.1% | 53,495 | $281.68 | $15M | −53,635 | −$17M |
| F5 INC - FFIV | 2.77% | New | 50,196 | $289.33 | $15M | +50,196 | +$15M |
| LIONSGATE STUDIOS CORP | 1.90% | New | 1,040,934 | $9.59 | $10M | +1,040,934 | +$10M |
| GUIDEWIRE SOFTWARE INC - GWRE | 1.79% | Reduce −50.1% | 62,863 | $149.56 | $9M | −63,194 | −$16M |
| ENERGY FUELS INC | 1.77% | New | 507,555 | $18.25 | $9M | +507,555 | +$9M |
| SPHERE ENTERTAINMENT CO | 1.64% | New | 73,345 | $117.40 | $9M | +73,345 | +$9M |
| AMBARELLA INC | 1.13% | Reduce −61.8% | 114,940 | $51.47 | $6M | −186,153 | −$15M |
| APPLOVIN CORP - APP | 1.10% | New | 14,480 | $398.00 | $6M | +14,480 | +$6M |
| DIGITAL RLTY TR INC - DLR | 1.03% | New | 29,838 | $180.21 | $5M | +29,838 | +$5M |
| ASTERA LABS INC - ALAB | 0.99% | Reduce −71.7% | 47,394 | $109.60 | $5M | −120,247 | −$23M |
| OSI SYSTEMS INC | 0.98% | New | 19,274 | $265.51 | $5M | +19,274 | +$5M |
| EQUINIX INC - EQIX | 0.95% | New | 5,102 | $980.24 | $5M | +5,102 | +$5M |
| PALANTIR TECHNOLOGIES INC - PLTR | 0.81% | Add +0.6% | 29,150 | $146.28 | $4M | +185 | −$884 |
| SNOWFLAKE INC - SNOW | 0.76% | New | 26,377 | $150.82 | $4M | +26,377 | +$4M |
| PEGASYSTEMS INC | — | Exit | 0 | $59.72 | — | −1,038,832 | −$62M |
| UNITY SOFTWARE INC - U | — | Exit | 0 | $44.17 | — | −1,065,452 | −$47M |
| CLEARWATER ANALYTICS HLDGS I - CWAN | — | Exit | 0 | $24.12 | — | −1,236,412 | −$30M |
| NCINO INC | — | Exit | 0 | $25.64 | — | −1,135,922 | −$29M |
| KLAVIYO INC - KLAC | — | Exit | 0 | $32.47 | — | −729,703 | −$24M |
| CREDO TECHNOLOGY GROUP HOLDI - CRDO | — | Exit | 0 | $143.89 | — | −149,966 | −$22M |
| DOCUSIGN INC - DOCU | — | Exit | 0 | $68.40 | — | −156,813 | −$11M |
| CCC INTELLIGENT SOLUTIONS HL - CCC | — | Exit | 0 | $7.95 | — | −1,075,546 | −$9M |
| QUALCOMM INC - QCOM | — | Exit | 0 | $171.06 | — | −46,212 | −$8M |
| MICRON TECHNOLOGY INC - MU | — | Exit | 0 | $285.39 | — | −20,400 | −$6M |
| WIX COM LTD - WIX | — | Exit | 0 | $103.89 | — | −46,731 | −$5M |
* Reported price is value ÷ shares from the 13F as of period end — not a live market quote. Weight % is each long-equity position ÷ full 13F AUM, so rows may not sum to 100% when the filing includes options or other non-equity (excluded from this table). Share change and $ change are vs 2025 Q4. Click column headers to sort · click New / Exit / Add / Reduce to promote that move type to the top. Among managers we track.
filings history
20 periods · normalized AUM · click period for holdings
| Period | Holdings | AUM | QoQ | Form | Filed | Filing ID |
|---|---|---|---|---|---|---|
| 2026 Q1 | 28 | $524M | −17.9% | 13F-HR | 5/14/2026 | 000101359426000581 |
| 2025 Q4 | 26 | $638M | +2.7% | 13F-HR | 2/17/2026 | 000101359426000239 |
| 2025 Q3 | 20 | $621M | −17.4% | 13F-HR | 11/13/2025 | 000101359425001398 |
| 2025 Q2 | 24 | $752M | +96.3% | 13F-HR | 8/13/2025 | 000101359425000992 |
| 2025 Q1 | 14 | $383M | −43.5% | 13F-HR | 5/14/2025 | 000101359425000645 |
| 2024 Q4 | 19 | $678M | −5.2% | 13F-HR | 2/13/2025 | 000101359425000260 |
| 2024 Q3 | 19 | $715M | +15.3% | 13F-HR | 11/13/2024 | 000101359424000941 |
| 2024 Q2 | 22 | $620M | +38.1% | 13F-HR | 8/13/2024 | 000101359424000640 |
| 2024 Q1 | 18 | $449M | −17.9% | 13F-HR | 5/14/2024 | 000101359424000471 |
| 2023 Q4 | 23 | $547M | +8.7% | 13F-HR | 2/13/2024 | 000101359424000153 |
| 2023 Q3 | 16 | $503M | +25.4% | 13F-HR | 11/13/2023 | 000101359423000910 |
| 2023 Q2 | 15 | $401M | −9.5% | 13F-HR | 8/11/2023 | 000101359423000659 |
| 2023 Q1 | 27 | $443M | +8.6% | 13F-HR | 5/12/2023 | 000101359423000466 |
| 2022 Q4 | 30 | $408M | +75.1% | 13F-HR | 2/13/2023 | 000101359423000174 |
| 2022 Q3 | 30 | $233M | −33.8% | 13F-HR | 11/14/2022 | 000156761922019714 |
| 2022 Q2 | 35 | $352M | −60.9% | 13F-HR | 8/15/2022 | 000156761922016018 |
| 2022 Q1 | 48 | $901M | — | RESTATEMENT | 7/20/2022 | 000156761922014249 |
| 2022 Q1 | 48 | $901M | −8.6% | 13F-HR | 5/16/2022 | 000156761922010783 |
| 2021 Q4 | 45 | $986M | −30.5% | 13F-HR | 2/14/2022 | 000156761922003912 |
| 2021 Q3 | 57 | $1.4B | — | 13F-HR | 11/15/2021 | 000156761921020217 |
About
Shannon River Fund Management LLC
20 processed 13Fs · since 2021 Q3