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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 | |
|---|---|---|---|---|---|---|
126
SandRidge Energy
SD
$517M
| $2.02M | 0.11% |
123,591
-10,409
| -8% | -$169K |
|
127
Fulgent Genetics
FLGT
$555M
| $1.7M | 0.09% |
106,642
-62,948
| -37% | -$1.37M |
|
128
Kosmos Energy
KOS
$1.57B
| $1.68M | 0.09% |
+602,542
| New | +$1.13M |
|
129
Alphabet (Google) Class C
GOOG
$4.17T
| $1.64M | 0.09% |
5,710
-1,282
| -18% | -$403K |
|
|
SEI
130
Solaris Energy Infrastructure
SEI
$3.86B
| $1.58M | 0.08% |
27,930
+8,456
| +43% | +$457K |
|
131
RadNet
RDNT
$4.66B
| $1.33M | 0.07% |
23,728
-93,778
| -80% | -$6.4M |
|
132
Planet Labs
PL
$8.05B
| $1.32M | 0.07% |
47,288
-21,427
| -31% | -$548K |
|
133
Guardant Health
GH
$20B
| $1.31M | 0.07% |
14,155
-89,933
| -86% | -$9.03M |
|
134
Casella Waste Systems
CWST
$5.75B
| $1.2M | 0.06% |
15,100
-125
| -0.8% | -$12K |
|
135
Dana Inc
DAN
$3.02B
| $1.15M | 0.06% |
34,237
-218,186
| -86% | -$6.82M |
|
|
TGEN
136
Tecogen Inc
TGEN
$106M
| $1.14M | 0.06% |
443,555
-2,255
| -0.5% | -$8.28K |
|
137
Transmedics
TMDX
$2.46B
| $1.06M | 0.06% |
10,688
-86,205
| -89% | -$11.2M |
|
|
ECG
138
Everus Construction Group
ECG
$6.99B
| $1.03M | 0.05% |
8,725
| – | – |
|
139
L3Harris
LHX
$53.1B
| $744K | 0.04% |
2,157
| – | – |
|
140
GDS Holdings
GDS
$6.55B
| $616K | 0.03% |
15,281
-78
| -0.5% | -$3.35K |
|
141
Domo
DOMO
$142M
| $603K | 0.03% |
197,104
-1,961,666
| -91% | -$9.94M |
|
142
Lincoln Educational Services
LINC
$1.27B
| $570K | 0.03% |
14,007
| – | – |
|
143
Establishment Labs
ESTA
$2.76B
| $544K | 0.03% |
9,573
-85,075
| -90% | -$5.81M |
|
144
Amplify Energy
AMPY
$169M
| $463K | 0.02% |
74,120
-14,943
| -17% | -$81.3K |
|
145
Alexandria Real Estate Equities
ARE
$8.65B
| – | – |
-43,555
| Closed | -$2.13M |
|
|
BAND
146
Bandwidth Inc
BAND
$2.06B
| – | – |
-336,874
| Closed | -$5.2M |
|
147
Claros Mortgage Trust
CMTG
$321M
| – | – |
-119,700
| Closed | -$366K |
|
148
DraftKings
DKNG
$11.3B
| – | – |
-183,778
| Closed | -$6.33M |
|
|
149
First American
FAF
$7.19B
| – | – |
-320,670
| Closed | -$19.7M |
|
150
Freeport-McMoran
FCX
$93.4B
| – | – |
-288,124
| Closed | -$14.6M |
|
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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.