Institutional Manager · CIK 0001301050
Shannon River Fund Management LLC
NEW YORK, NY · File #028-12219
Latest AUM
$637.5M
Positions
26
Top-10 Concentration
63.0%
Filings
9
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| NEW | UNITY SOFTWARE INC | U | +1,065,452 | +$47.1M | $0 |
| REDUCE | TOWER SEMICONDUCTOR LTD | TSEM | -359,259 | -$42.2M | +$43.4M |
| EXITED | JFROG LTD | M6191J100 | -863,924 | -$40.9M | $0 |
| REDUCE | INTERDIGITAL INC | IDCC | -125,230 | -$39.9M | -$4.8M |
| NEW | LIVE NATION ENTERTAINMENT IN | LYV | +255,433 | +$36.4M | $0 |
| EXITED | FORMFACTOR INC | 346375108 | -968,161 | -$35.3M | $0 |
| REDUCE | FLEX LTD | FLEX | -536,143 | -$32.4M | +$2.1M |
| NEW | EXTREME NETWORKS | EXTR | +1,904,528 | +$31.7M | $0 |
| NEW | CELESTICA INC | CLS | +107,130 | +$31.7M | $0 |
| REDUCE | WIX COM LTD | WIX | -283,352 | -$29.4M | -$24.3M |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 202526 pos · $637.5M
- 13F HOLDINGS REPORTQ/E Sep 202520 pos · $621.2M
- 13F HOLDINGS REPORTQ/E Jun 202524 pos · $752.0M
- 13F HOLDINGS REPORTQ/E Mar 202514 pos · $383.2M
- 13F HOLDINGS REPORTQ/E Dec 202419 pos · $677.6M
- 13F HOLDINGS REPORTQ/E Sep 202419 pos · $714.7M
- 13F HOLDINGS REPORTQ/E Jun 202422 pos · $620.5M
- 13F HOLDINGS REPORTQ/E Mar 202418 pos · $449.1M
- 13F HOLDINGS REPORTQ/E Dec 202316 pos · $503.1M
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | TOWER SEMICONDUCTOR LTD | TSEM | 602,804 | $70.8M | 11.10% |
| 2 | PEGASYSTEMS INC | PEGA | 1,038,832 | $62.0M | 9.73% |
| 3 | UNITY SOFTWARE INC | U | 1,065,452 | $47.1M | 7.38% |
| 4 | LIVE NATION ENTERTAINMENT IN | LYV | 255,433 | $36.4M | 5.71% |
| 5 | MARVELL TECHNOLOGY INC | MRVL | 377,684 | $32.1M | 5.03% |
| 6 | EXTREME NETWORKS | EXTR | 1,904,528 | $31.7M | 4.97% |
| 7 | CELESTICA INC | CLS | 107,130 | $31.7M | 4.97% |
| 8 | COHERENT CORP | COHR | 167,918 | $31.0M | 4.86% |
| 9 | CLEARWATER ANALYTICS HLDGS I | CWAN | 1,236,412 | $29.8M | 4.68% |
| 10 | NCINO INC | NCNO | 1,135,922 | $29.1M | 4.57% |
| 11 | ASTERA LABS INC | ALAB | 167,641 | $27.9M | 4.37% |
| 12 | GUIDEWIRE SOFTWARE INC | GWRE | 126,057 | $25.3M | 3.97% |
| 13 | KLAVIYO INC | KVYO | 729,703 | $23.7M | 3.72% |
| 14 | CREDO TECHNOLOGY GROUP HOLDI | CRDO | 149,966 | $21.6M | 3.38% |
| 15 | AMBARELLA INC | AMBA | 301,093 | $21.3M | 3.35% |
| 16 | FLEX LTD | FLEX | 313,273 | $18.9M | 2.97% |
| 17 | INTERDIGITAL INC | IDCC | 53,490 | $17.0M | 2.67% |
| 18 | LEGENCE CORP | LGN | 334,863 | $14.4M | 2.26% |
| 19 | AXON ENTERPRISE INC | AXON | 20,716 | $11.8M | 1.85% |
| 20 | HINGE HEALTH INC | HNGE | 233,354 | $10.8M | 1.70% |