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Roubaix Capital Portfolio holdings

AUM $279M Turnover 69.01%
1-Year Est. Return 54.84%
This Fund
S&P 500
This Quarter Est. Return
+2.69%
1 Year Est. Return
+54.84%
3 Year Est. Return
+173.81%
5 Year Est. Return
+195.03%
10 Year Est. Return
–
AUM
$235M
AUM Growth
+$19.8M
Cap. Flow
+$18.2M
Cap. Flow %
7.75%
Top 10 Hldgs %
29.6%
Holding
68
New
21
Increased
15
Reduced
10
Closed
22
Avg Time Held
0.5 years
Top 10 Avg Time Held
0.6 years
Top 20 Avg Time Held
0.6 years

Top Buys

Rank Stock Value
1
RVTY icon
Revvity
RVTY
+$5.87M
2
XMTR icon
Xometry
XMTR
+$5.69M
3
BIRK icon
Birkenstock
BIRK
+$5.53M
4
AZTA icon
Azenta
AZTA
+$5.3M
5
TRNS icon
Transcat
TRNS
+$5.27M

Top Sells

Rank Stock Value
1
TATT icon
TAT Technologies
TATT
+$11M
2
ATS icon
ATS Corp
ATS
+$5.86M
3
JHX icon
James Hardie Industries
JHX
+$5.6M
4
SKY icon
Champion Homes
SKY
+$4.78M
5
WAY icon
Waystar Holding Corp
WAY
+$4.48M

Sector Composition

Rank Sector Weight
1 Technology 33.84%
2 Industrials 30.82%
3 Healthcare 17.23%
4 Consumer Discretionary 9.23%
5 Materials 4.65%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow Held Since
LFUS icon
26
Littelfuse
LFUS
$9.67B
$4.92M 2.1%
+19,442
New +$4.95M
2025 Q4
0 quarters
ORA icon
27
Ormat Technologies
ORA
$5.49B
$4.82M 2.05%
43,598
-18,457
-30% -$2.02M
2025 Q1
3 quarters
NXT icon
28
Nextpower Inc. Common Stock
NXT
$12.1B
$4.75M 2.02%
+54,513
New +$4.94M
2025 Q4
0 quarters
EVLV icon
29
Evolv Technologies
EVLV
$753M
$4.49M 1.91%
+626,414
New +$4.45M
2025 Q4
0 quarters
KRMN icon
30
Karman Holdings
KRMN
$4.6B
$4.47M 1.91%
+61,118
New +$4.43M
2025 Q4
0 quarters
SWIM icon
31
Latham Group
SWIM
$720M
$4.34M 1.85%
684,028
+209,285
+44% +$1.46M
2024 Q1
7 quarters
MLAB icon
32
Mesa Laboratories
MLAB
$685M
$4.33M 1.85%
55,189
-21,468
-28% -$1.63M
2025 Q3
1 quarter
LTH icon
33
Life Time Group Holdings
LTH
$9.05B
$4.31M 1.84%
+162,150
New +$4.22M
2025 Q4
0 quarters
ATI icon
34
ATI
ATI
$25.3B
$4.28M 1.82%
37,284
-9,259
-20% -$902K
2025 Q1
3 quarters
ITRI icon
35
Itron
ITRI
$3.64B
$4.19M 1.79%
+45,141
New +$4.92M
2025 Q4
0 quarters
ATR icon
36
AptarGroup
ATR
$7.92B
$4.19M 1.78%
+34,317
New +$4.24M
2025 Q4
0 quarters
KIDS icon
37
OrthoPediatrics
KIDS
$573M
$4.16M 1.77%
+234,323
New +$4.1M
2025 Q4
0 quarters
STVN icon
38
Stevanato
STVN
$5.16B
$3.94M 1.68%
+195,973
New +$4.55M
2025 Q4
0 quarters
PAR icon
39
PAR Technology
PAR
$717M
$3.86M 1.65%
+106,461
New +$3.84M
2025 Q4
0 quarters
TKNO icon
40
Alpha Teknova
TKNO
$380M
$3.79M 1.62%
998,532
+164,713
+20% +$802K
2025 Q2
2 quarters
AAOI icon
41
Applied Optoelectronics
AAOI
$6.42B
$3.77M 1.61%
+108,275
New +$3.23M
2025 Q4
0 quarters
VERX icon
42
Vertex
VERX
$2.17B
$3.68M 1.57%
+184,446
New +$3.99M
2025 Q4
0 quarters
PCOR icon
43
Procore
PCOR
$8.66B
$3.42M 1.46%
47,067
+2,572
+6% +$190K
2025 Q3
1 quarter
MEC icon
44
Mayville Engineering Co
MEC
$354M
$2.74M 1.17%
146,297
-66,391
-31% -$1.08M
2025 Q2
2 quarters
CLBT icon
45
Cellebrite
CLBT
$2.77B
$2.63M 1.12%
145,679
-41,442
-22% -$744K
2025 Q2
2 quarters
SI icon
46
Shoulder Innovations Inc
SI
$377M
$2.27M 0.97%
+158,816
New +$2.17M
2025 Q4
0 quarters
AEIS icon
47
Advanced Energy
AEIS
$9.53B
– –
-25,857
Closed -$4.4M –
AIP icon
48
Arteris
AIP
$922M
– –
-233,726
Closed -$2.36M –
APPN icon
49
Appian
APPN
$2.95B
– –
-133,512
Closed -$4.08M –
ATS icon
50
ATS Corp
ATS
$1.78B
– –
-223,532
Closed -$5.86M –
1
2
3

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Roubaix Capital's Q4 2025 Portfolio in Review

As of Q4 2025, Roubaix Capital held 68 positions worth $235M, up 9.2% from $215M the previous quarter. Its ten largest holdings account for 30% of the portfolio.

Roubaix Capital deployed $18.2M of net new capital in Q4 2025, opening 21 new positions and adding to 15 existing holdings. Its largest new stake was Revvity: 61,105 shares worth $5.91M.

By sector, the portfolio is most concentrated in Technology at 34% of assets, up from 30% a quarter earlier, followed by Industrials and Healthcare.

On the sell side, the largest reduction was nLIGHT, an estimated $3.51M trimmed.

  • Roubaix Capital's largest Q4 2025 buy was Revvity: 61,105 shares worth $5.91M.
  • Roubaix Capital added most to Azenta in Q4 2025, an estimated $5.3M increase.
  • Roubaix Capital's biggest Q4 2025 reduction was nLIGHT, cutting an estimated $3.51M.
  • Roubaix Capital fully exited TAT Technologies in Q4 2025, selling an estimated $11M.
  • Roubaix Capital's ten largest holdings make up 30% of its $235M portfolio in Q4 2025.
  • Roubaix Capital opened 21 new positions and closed 22 in Q4 2025.
  • Roubaix Capital's portfolio value rose 9.2% quarter-over-quarter to $235M.

Based on Roubaix Capital's 13F filing for Q4 2025, filed 9 Feb 2026.