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Roubaix Capital Portfolio holdings

AUM $214M
1-Year Est. Return 32.43%
This Fund
S&P 500
This Quarter Est. Return
+2.69%
1 Year Est. Return
+32.43%
3 Year Est. Return
+104.01%
5 Year Est. Return
+128.11%
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

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
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
LFUS icon
26
Littelfuse
LFUS
$10.3B
$4.92M 2.1%
+19,442
New +$4.95M
ORA icon
27
Ormat Technologies
ORA
$6.2B
$4.82M 2.05%
43,598
-18,457
-30% -$2.02M
NXT icon
28
Nextpower Inc
NXT
$15.2B
$4.75M 2.02%
+54,513
New +$4.94M
EVLV icon
29
Evolv Technologies
EVLV
$968M
$4.49M 1.91%
+626,414
New +$4.45M
KRMN
30
Karman Holdings
KRMN
$6.53B
$4.47M 1.91%
+61,118
New +$4.43M
SWIM icon
31
Latham Group
SWIM
$668M
$4.34M 1.85%
684,028
+209,285
+44% +$1.46M
MLAB icon
32
Mesa Laboratories
MLAB
$540M
$4.33M 1.85%
55,189
-21,468
-28% -$1.63M
LTH icon
33
Life Time Group Holdings
LTH
$9.62B
$4.31M 1.84%
+162,150
New +$4.22M
ATI icon
34
ATI
ATI
$27.1B
$4.28M 1.82%
37,284
-9,259
-20% -$902K
ITRI icon
35
Itron
ITRI
$3.74B
$4.19M 1.79%
+45,141
New +$4.92M
ATR icon
36
AptarGroup
ATR
$8.49B
$4.19M 1.78%
+34,317
New +$4.24M
KIDS icon
37
OrthoPediatrics
KIDS
$506M
$4.16M 1.77%
+234,323
New +$4.1M
STVN icon
38
Stevanato
STVN
$5.34B
$3.94M 1.68%
+195,973
New +$4.55M
PAR icon
39
PAR Technology
PAR
$659M
$3.86M 1.65%
+106,461
New +$3.84M
TKNO icon
40
Alpha Teknova
TKNO
$266M
$3.79M 1.62%
998,532
+164,713
+20% +$802K
AAOI icon
41
Applied Optoelectronics
AAOI
$7.97B
$3.77M 1.61%
+108,275
New +$3.23M
VERX icon
42
Vertex
VERX
$1.97B
$3.68M 1.57%
+184,446
New +$3.99M
PCOR icon
43
Procore
PCOR
$6.7B
$3.42M 1.46%
47,067
+2,572
+6% +$190K
MEC icon
44
Mayville Engineering Co
MEC
$777M
$2.74M 1.17%
146,297
-66,391
-31% -$1.08M
CLBT icon
45
Cellebrite
CLBT
$3.66B
$2.63M 1.12%
145,679
-41,442
-22% -$744K
SI
46
Shoulder Innovations Inc
SI
$420M
$2.27M 0.97%
+158,816
New +$2.17M
AEIS icon
47
Advanced Energy
AEIS
$12.1B
– –
-25,857
Closed -$4.4M
AIP icon
48
Arteris
AIP
$1.43B
– –
-233,726
Closed -$2.36M
APPN icon
49
Appian
APPN
$1.81B
– –
-133,512
Closed -$4.08M
ATS icon
50
ATS Corp
ATS
$2.59B
– –
-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.