2026 Q1 Portfolio Activity
In 2026 Q1, Shannon River Fund Management LLC maintained a portfolio of 39 distinct positions. The most significant new addition was AIRBNB INC, now representing 5.95% of the total fund value. They heavily accumulated shares in MARVELL TECHNOLOGY INC, increasing the position by 49.2%. Conversely, Shannon River Fund Management LLC completely exited their position in PEGASYSTEMS INC.
Position History
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Total Positions
39
Quarter
2026 Q1
Top Holding
TSEM (16.9%)
Top 10 Concentration
66.7%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-39 of 39
Shannon River Fund Management LLC Full Holdings List — 2026 Q1
| Stock | History | Sector / Type | Port % | Prev % | Rank / Prev | Conviction | Change | % Change | Influence | Shares | Mkt Value | Avg Cost | Price Held | 1st Owned | Source | Source Date | Date Reported | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
TSEM
TOWER SEMICONDU...
|
Technology | 16.88% | 11.10% |
#1
Prev: #1
|
6.5 |
—
|
-98,565 | -16.4% |
P
S
|
504,239 | $88,483,860 | 2023 Q4 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
MRVL
MARVELL TECHNOL...
|
Technology | 10.65% | 5.03% |
#2
3
Prev: #5
|
8.0 |
—
|
185,889 | 49.2% |
P
S
|
563,573 | $55,821,906 | 2015 Q2 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
LYV
LIVE NATION ENT...
|
Communication Services | 8.57% | 5.71% |
#3
1
Prev: #4
|
6.4 |
—
|
38,965 | 15.3% |
P
S
|
294,398 | $44,898,639 | 2010 Q1 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
ABNB
AIRBNB INC
|
Consumer Cyclical | 5.95% | — |
#4
Prev: #—
|
6.4 |
—
|
247,006 | — |
NEW
|
247,006 | $31,191,918 | 2026 Q1 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
RMBS
RAMBUS INC DEL
|
Technology | 5.48% | — |
#5
Prev: #—
|
6.2 |
—
|
333,817 | — |
NEW
|
333,817 | $28,718,276 | 2008 Q3 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
COHR
COHERENT CORP
|
Technology | 4.00% | 4.86% |
#6
2
Prev: #8
|
1.6 |
—
|
-80,013 | -47.7% |
P
S
|
87,905 | $20,939,850 | 2025 Q2 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
FLEX
FLEXTRONICS INT...
|
Technology | 3.89% | 2.97% |
#7
9
Prev: #16
|
2.1 |
—
|
-2,050 | -0.7% |
P
S
|
311,223 | $20,372,658 | 2019 Q3 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
AXON
AXON ENTERPRISE...
|
Industrials | 3.84% | 1.85% |
#8
11
Prev: #19
|
4.5 |
—
|
26,726 | 129.0% |
P
S
|
47,442 | $20,148,143 | 2025 Q4 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
EXTR
EXTREME NETWORK...
|
Technology | 3.78% | 4.97% |
#9
3
Prev: #6
|
1.5 |
—
|
-591,467 | -31.1% |
P
S
|
1,313,061 | $19,800,960 | 2010 Q3 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
TOST
TOAST INC
|
Technology | 3.70% | — |
#10
Prev: #—
|
5.0 |
—
|
732,027 | — |
NEW
|
732,027 | $19,406,036 | 2026 Q1 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
LGN
LEGENCE CORP
|
Industrials | 3.64% | 2.26% |
#11
7
Prev: #18
|
2.0 |
—
|
2,775 | 0.8% |
P
S
|
337,638 | $19,063,042 | 2025 Q4 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
IDCC
INTERDIGITAL IN...
|
Technology | 3.12% | 2.67% |
#12
5
Prev: #17
|
1.7 |
—
|
614 | 1.1% |
P
S
|
54,104 | $16,339,408 | 2008 Q1 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
HNGE
HINGE HEALTH IN...
|
Healthcare | 3.07% | 1.70% |
#13
7
Prev: #20
|
4.2 |
—
|
183,828 | 78.8% |
P
S
|
417,182 | $16,086,538 | 2025 Q4 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
ADTN
ADTRAN HOLDINGS...
|
Technology | 2.93% | — |
#14
Prev: #—
|
4.7 |
—
|
1,219,976 | — |
NEW
|
1,219,976 | $15,347,298 | 2026 Q1 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
CLS
CELESTICA INC
|
Technology | 2.88% | 4.97% |
#15
8
Prev: #7
|
1.2 |
—
|
-53,635 | -50.1% |
P
S
|
53,495 | $15,068,472 | 2024 Q3 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
FFIV
F5 INC
|
Technology | 2.77% | — |
#16
Prev: #—
|
4.6 |
—
|
50,196 | — |
NEW
|
50,196 | $14,523,209 | 2009 Q3 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
LION
LIONSGATE STUDI...
|
Unknown | 1.90% | — |
#17
Prev: #—
|
4.3 |
—
|
1,040,934 | — |
NEW
|
1,040,934 | $9,982,557 | 2026 Q1 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
GWRE
GUIDEWIRE SOFTW...
|
Technology | 1.79% | 3.97% |
#18
6
Prev: #12
|
0.7 |
—
|
-63,194 | -50.1% |
P
S
|
62,863 | $9,401,790 | 2018 Q2 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
UUUU
ENERGY FUELS IN...
|
Energy | 1.77% | — |
#19
Prev: #—
|
4.2 |
—
|
507,555 | — |
NEW
|
507,555 | $9,262,879 | 2026 Q1 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
SPHR
SPHERE ENTERTAI...
|
Communication Services | 1.64% | — |
#20
Prev: #—
|
4.2 |
—
|
73,345 | — |
NEW
|
73,345 | $8,610,703 | 2026 Q1 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
AMBA
AMBARELLA INC
|
Technology | 1.13% | 3.35% |
#21
6
Prev: #15
|
0.5 |
—
|
-186,153 | -61.8% |
P
S
|
114,940 | $5,916,536 | 2017 Q1 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
APP
APPLOVIN CORP
|
Communication Services | 1.10% | — |
#22
Prev: #—
|
3.9 |
—
|
14,480 | — |
NEW
|
14,480 | $5,763,040 | 2026 Q1 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
DLR
DIGITAL RLTY TR...
|
Real Estate | 1.03% | — |
#23
Prev: #—
|
3.9 |
—
|
29,838 | — |
NEW
|
29,838 | $5,377,106 | 2026 Q1 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
ALAB
ASTERA LABS INC
|
Technology | 0.99% | 4.37% |
#24
13
Prev: #11
|
0.4 |
—
|
-120,247 | -71.7% |
P
S
|
47,394 | $5,194,383 | 2025 Q4 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
OSIS
OSI SYSTEMS INC
|
Technology | 0.98% | — |
#25
Prev: #—
|
3.9 |
—
|
19,274 | — |
NEW
|
19,274 | $5,117,440 | 2016 Q4 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
EQIX
EQUINIX INC
|
Real Estate | 0.95% | — |
#26
Prev: #—
|
3.9 |
—
|
5,102 | — |
NEW
|
5,102 | $5,001,184 | 2008 Q3 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
PLTR
PALANTIR TECHNO...
|
Technology | 0.81% | 0.81% |
#27
2
Prev: #25
|
0.8 |
—
|
185 | 0.6% |
P
S
|
29,150 | $4,264,062 | 2025 Q1 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
SNOW
SNOWFLAKE INC
|
Technology | 0.76% | — |
#28
Prev: #—
|
3.8 |
—
|
26,377 | — |
NEW
|
26,377 | $3,978,179 | 2026 Q1 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
WIX
WIX COM LTD
|
Technology | 0.00% | 0.76% |
Sold All 😨
(Was: #26) |
0.0 |
—
|
-46,731 | -100.0% |
CLOSED
|
— | $— | 2023 Q3 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
MU
MICRON TECHNOLO...
|
Technology | 0.00% | 0.91% |
Sold All 😨
(Was: #24) |
0.0 |
—
|
-20,400 | -100.0% |
CLOSED
|
— | $— | 2021 Q1 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
QCOM
QUALCOMM INC
|
Technology | 0.00% | 1.24% |
Sold All 😨
(Was: #23) |
0.0 |
—
|
-46,212 | -100.0% |
CLOSED
|
— | $— | 2008 Q1 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
CCCS
CCC INTELLIGENT...
|
Unknown | 0.00% | 1.34% |
Sold All 😨
(Was: #22) |
0.0 |
—
|
-1,075,546 | -100.0% |
CLOSED
|
— | $— | 2025 Q2 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
DOCU
DOCUSIGN INC
|
Technology | 0.00% | 1.68% |
Sold All 😨
(Was: #21) |
0.0 |
—
|
-156,813 | -100.0% |
CLOSED
|
— | $— | 2024 Q4 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
CRDO
CREDO TECHNOLOG...
|
Technology | 0.00% | 3.38% |
Sold All 😨
(Was: #14) |
0.0 |
—
|
-149,966 | -100.0% |
CLOSED
|
— | $— | 2025 Q2 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
KVYO
KLAVIYO INC
|
Technology | 0.00% | 3.72% |
Sold All 😨
(Was: #13) |
0.0 |
—
|
-729,703 | -100.0% |
CLOSED
|
— | $— | 2025 Q4 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
NCNO
NCINO INC
|
Technology | 0.00% | 4.57% |
Sold All 😨
(Was: #10) |
0.0 |
—
|
-1,135,922 | -100.0% |
CLOSED
|
— | $— | 2025 Q2 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
CWAN
CLEARWATER ANAL...
|
Technology | 0.00% | 4.68% |
Sold All 😨
(Was: #9) |
0.0 |
—
|
-1,236,412 | -100.0% |
CLOSED
|
— | $— | 2023 Q3 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
U
UNITY SOFTWARE ...
|
Technology | 0.00% | 7.38% |
Sold All 😨
(Was: #3) |
0.0 |
—
|
-1,065,452 | -100.0% |
CLOSED
|
— | $— | 2025 Q2 | 13F Filing | 2026-03-31 | 2026-05-14 | |||
|
PEGA
PEGASYSTEMS INC
|
Technology | 0.00% | 9.73% |
Sold All 😨
(Was: #2) |
0.0 |
—
|
-1,038,832 | -100.0% |
CLOSED
|
— | $— | 2006 Q4 | 13F Filing | 2026-03-31 | 2026-05-14 |
Showing 1-39 of 39 holdings