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Portolan Capital Management Portfolio holdings
AUM
$1.88B
1-Year Est. Return
115.74%
This Fund
S&P 500
This Quarter
Est. Return
+14.56%
1 Year Est. Return
+115.74%
3 Year Est. Return
+581.85%
5 Year Est. Return
+1,047.01%
10 Year Est. Return
+13,266.68%
AUM
$1.88B
AUM Growth
+$12.5M
(+0.67%)
Cap. Flow
-$57.3M
Cap. Flow
% of AUM
-3.05%
Top 10 Holdings %
Top 10 Hldgs %
27.97%
Holding
185
New
30
Increased
49
Reduced
61
Closed
41
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Virtu Financial
VIRT
|
+$32.5M |
| 2 |
Par Pacific Holdings
PARR
|
+$31.1M |
| 3 |
PBF Energy
PBF
|
+$30M |
| 4 |
Crescent Energy
CRGY
|
+$26.8M |
| 5 |
Fabrinet
FN
|
+$22.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
TTM Technologies
TTMI
|
+$39.9M |
| 2 |
Modine Manufacturing
MOD
|
+$23.3M |
| 3 |
First Solar
FSLR
|
+$20.6M |
| 4 |
nLIGHT
LASR
|
+$19.8M |
| 5 |
First American
FAF
|
+$19.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 34.42% |
| 2 | Consumer Discretionary | 13.66% |
| 3 | Industrials | 12.34% |
| 4 | Healthcare | 11.94% |
| 5 | Energy | 9.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
101
Personalis
PSNL
$1.31B
| $4.69M | 0.25% |
736,713
+357,516
| +94% | +$3.02M |
|
102
Mobileye
MBLY
$7.39B
| $4.66M | 0.25% |
678,135
+336,199
| +98% | +$3.05M |
|
103
i3 Verticals
IIIV
$383M
| $4.63M | 0.25% |
207,274
-464,713
| -69% | -$10.8M |
|
104
Onto Innovation
ONTO
$14.7B
| $4.57M | 0.24% |
+22,263
| New | +$4.56M |
|
105
ProPetro Holding
PUMP
$1.67B
| $4.54M | 0.24% |
+314,815
| New | +$3.76M |
|
|
SEZL
106
Sezzle
SEZL
$5.86B
| $4.43M | 0.24% |
70,046
-97,827
| -58% | -$6.67M |
|
107
Novanta
NOVT
$5.17B
| $4.43M | 0.24% |
37,507
-69,588
| -65% | -$9.13M |
|
108
Douglas Elliman
DOUG
$160M
| $4.38M | 0.23% |
2,669,030
+315,080
| +13% | +$730K |
|
109
Vicor
VICR
$9.91B
| $4.29M | 0.23% |
26,670
-22,051
| -45% | -$3.64M |
|
110
Lumentum
LITE
$64.6B
| $4.09M | 0.22% |
5,822
| – | – |
|
111
Bio-Rad Laboratories Class A
BIO
$8.19B
| $3.95M | 0.21% |
14,173
-19,986
| -59% | -$5.76M |
|
112
Sanmina
SANM
$11.7B
| $3.54M | 0.19% |
27,332
-39,257
| -59% | -$5.77M |
|
|
FPS
113
Forgent Power Solutions
FPS
$10.1B
| $3.45M | 0.18% |
+117,933
| New | +$3.92M |
|
|
DPRO
114
Draganfly
DPRO
$159M
| $3.35M | 0.18% |
+682,730
| New | +$5.06M |
|
115
Green Dot
GDOT
$753M
| $3.35M | 0.18% |
298,697
-108,037
| -27% | -$1.28M |
|
116
ACM Research
ACMR
$6.19B
| $3.28M | 0.17% |
83,256
-202,250
| -71% | -$10.7M |
|
117
Sprout Social
SPT
$457M
| $3.18M | 0.17% |
558,350
+256,877
| +85% | +$1.98M |
|
|
XZO
118
Exzeo Group
XZO
$1.44B
| $3.08M | 0.16% |
209,885
-195,129
| -48% | -$3.47M |
|
119
Oshkosh
OSK
$9.27B
| $2.68M | 0.14% |
18,185
-7,755
| -30% | -$1.21M |
|
120
Applied Optoelectronics
AAOI
$8.87B
| $2.52M | 0.13% |
29,833
-198,625
| -87% | -$12.7M |
|
121
Amplitude
AMPL
$1.16B
| $2.45M | 0.13% |
359,593
-200,503
| -36% | -$1.65M |
|
122
Tapestry
TPR
$29B
| $2.4M | 0.13% |
17,038
-8,830
| -34% | -$1.25M |
|
123
GigaCloud Technology
GCT
$1.38B
| $2.36M | 0.13% |
52,014
-85,464
| -62% | -$3.47M |
|
124
Natera
NTRA
$37.8B
| $2.28M | 0.12% |
11,418
-4,170
| -27% | -$897K |
|
|
UCTT
125
Ultra Clean Holdings
UCTT
$4.55B
| $2.1M | 0.11% |
+33,700
| New | +$1.73M |
|
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Portolan Capital Management's Q1 2026 Portfolio in Review
As of Q1 2026, Portolan Capital Management held 185 positions worth $1.88B, up 0.67% from $1.87B the previous quarter. Its ten largest holdings account for 28% of the portfolio.
Portolan Capital Management withdrew a net $57.3M in Q1 2026, closing 41 positions and reducing 61 holdings. Its most notable exit was First Solar, an estimated $20.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 34% of assets, down from 39% a quarter earlier, followed by Consumer Discretionary and Industrials.
Against the trend, Portolan Capital Management opened a new position in Par Pacific Holdings worth $43.5M.
- Portolan Capital Management's largest Q1 2026 buy was Par Pacific Holdings: 693,834 shares worth $43.5M.
- Portolan Capital Management added most to Virtu Financial in Q1 2026, an estimated $32.5M increase.
- Portolan Capital Management's biggest Q1 2026 reduction was TTM Technologies, cutting an estimated $39.9M.
- Portolan Capital Management fully exited First Solar in Q1 2026, selling an estimated $20.6M.
- Portolan Capital Management's ten largest holdings make up 28% of its $1.88B portfolio in Q1 2026.
- Portolan Capital Management opened 30 new positions and closed 41 in Q1 2026.
- Portolan Capital Management's portfolio value rose 0.67% quarter-over-quarter to $1.88B.
Based on Portolan Capital Management's 13F filing for Q1 2026, filed 15 May 2026.