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SRFM

Shannon River Fund Management Portfolio holdings

AUM $1.12B
1-Year Est. Return 150.26%
This Fund
S&P 500
This Quarter Est. Return
+10.64%
1 Year Est. Return
+150.26%
3 Year Est. Return
+553.98%
5 Year Est. Return
+735.5%
10 Year Est. Return
+5,351.96%
AUM
$524M
AUM Growth
-$113M
Cap. Flow
-$134M
Cap. Flow %
-25.57%
Top 10 Hldgs %
66.74%
Holding
39
New
13
Increased
7
Reduced
8
Closed
11

Top Buys

Rank Stock Value
1
RMBS icon
Rambus
RMBS
+$33.3M
2
ABNB icon
Airbnb
ABNB
+$32.1M
3
TOST icon
Toast
TOST
+$21.8M
4
MRVL icon
Marvell Technology
MRVL
+$15.6M
5
FFIV icon
F5
FFIV
+$13.9M

Top Sells

Rank Stock Value
1
PEGA icon
Pegasystems
PEGA
+$62M
2
U icon
Unity
U
+$47.1M
3
CWAN
Clearwater Analytics
CWAN
+$29.8M
4
NCNO icon
nCino
NCNO
+$29.1M
5
KVYO icon
Klaviyo
KVYO
+$23.7M

Sector Composition

Rank Sector Weight
1 Technology 66.53%
2 Communication Services 13.21%
3 Industrials 7.48%
4 Consumer Discretionary 5.95%
5 Healthcare 3.07%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
TSEM icon
1
Tower Semiconductor
TSEM
$28.6B
$88.5M 16.88%
504,239
-98,565
-16% -$13.3M
MRVL icon
2
Marvell Technology
MRVL
$199B
$55.8M 10.65%
563,573
+185,889
+49% +$15.6M
LYV icon
3
Live Nation Entertainment
LYV
$43.2B
$44.9M 8.57%
294,398
+38,965
+15% +$5.9M
ABNB icon
4
Airbnb
ABNB
$111B
$31.2M 5.95%
+247,006
New +$32.1M
RMBS icon
5
Rambus
RMBS
$10.8B
$28.7M 5.48%
+333,817
New +$33.3M
COHR icon
6
Coherent
COHR
$64B
$20.9M 4%
87,905
-80,013
-48% -$18.3M
FLEX icon
7
Flex
FLEX
$45.9B
$20.4M 3.89%
311,223
-2,050
-0.7% -$131K
AXON
8
Axon Enterprise
AXON
$50B
$20.1M 3.84%
47,442
+26,726
+129% +$13.9M
EXTR icon
9
Extreme Networks
EXTR
$3.16B
$19.8M 3.78%
1,313,061
-591,467
-31% -$8.83M
TOST icon
10
Toast
TOST
$20.4B
$19.4M 3.7%
+732,027
New +$21.8M
LGN
11
Legence Corp
LGN
$4.86B
$19.1M 3.64%
337,638
+2,775
+0.8% +$140K
IDCC icon
12
InterDigital
IDCC
$8.88B
$16.3M 3.12%
54,104
+614
+1% +$209K
HNGE
13
Hinge Health
HNGE
$7.05B
$16.1M 3.07%
417,182
+183,828
+79% +$7.64M
ADTN icon
14
Adtran
ADTN
$665M
$15.3M 2.93%
+1,219,976
New +$12.4M
CLS icon
15
Celestica
CLS
$43.8B
$15.1M 2.88%
53,495
-53,635
-50% -$15.6M
FFIV icon
16
F5
FFIV
$24B
$14.5M 2.77%
+50,196
New +$13.9M
LION icon
17
Lionsgate Studios
LION
$3.49B
$9.98M 1.9%
+1,040,934
New +$9.61M
GWRE icon
18
Guidewire Software
GWRE
$15.2B
$9.4M 1.79%
62,863
-63,194
-50% -$9.62M
UUUU icon
19
Energy Fuels
UUUU
$3.64B
$9.26M 1.77%
+507,555
New +$10.5M
SPHR icon
20
Sphere Entertainment
SPHR
$6.33B
$8.61M 1.64%
+73,345
New +$7.67M
AMBA icon
21
Ambarella
AMBA
$3.6B
$5.92M 1.13%
114,940
-186,153
-62% -$11.6M
APP icon
22
Applovin
APP
$105B
$5.76M 1.1%
+14,480
New +$7M
DLR icon
23
Digital Realty Trust
DLR
$73.1B
$5.38M 1.03%
+29,838
New +$5.1M
ALAB icon
24
Astera Labs
ALAB
$56B
$5.19M 0.99%
47,394
-120,247
-72% -$17.1M
OSIS icon
25
OSI Systems
OSIS
$3.82B
$5.12M 0.98%
+19,274
New +$5.33M
1
2

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Shannon River Fund Management's Q1 2026 Portfolio in Review

As of Q1 2026, Shannon River Fund Management held 39 positions worth $524M, down 18% from $638M the previous quarter. Its ten largest holdings account for 67% of the portfolio.

Shannon River Fund Management withdrew a net $134M in Q1 2026, closing 11 positions and reducing 8 holdings. Its most notable exit was Pegasystems, an estimated $62M position sold in full.

By sector, the portfolio is most concentrated in Technology at 67% of assets, down from 88% a quarter earlier, followed by Communication Services and Industrials.

Against the trend, Shannon River Fund Management opened a new position in Rambus worth $28.7M.

  • Shannon River Fund Management's largest Q1 2026 buy was Rambus: 333,817 shares worth $28.7M.
  • Shannon River Fund Management added most to Marvell Technology in Q1 2026, an estimated $15.6M increase.
  • Shannon River Fund Management's biggest Q1 2026 reduction was Coherent, cutting an estimated $18.3M.
  • Shannon River Fund Management fully exited Pegasystems in Q1 2026, selling an estimated $62M.
  • Shannon River Fund Management's ten largest holdings make up 67% of its $524M portfolio in Q1 2026.
  • Shannon River Fund Management opened 13 new positions and closed 11 in Q1 2026.
  • Shannon River Fund Management's portfolio value fell 18% quarter-over-quarter to $524M.

Based on Shannon River Fund Management's 13F filing for Q1 2026, filed 14 May 2026.