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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 | |
|---|---|---|---|---|---|---|
|
151
First Solar
FSLR
$22.4B
| – | – |
-78,761
| Closed | -$20.6M |
|
152
Gates Industrial Corporation Ltd.
GTES
$6.96B
| – | – |
-97,125
| Closed | -$2.09M |
|
153
Harvard Bioscience
HBIO
$27.6M
| – | – |
-40,965
| Closed | -$274K |
|
154
MarineMax
HZO
$725M
| – | – |
-487,426
| Closed | -$11.8M |
|
155
indie Semiconductor
INDI
$801M
| – | – |
-671,998
| Closed | -$2.37M |
|
156
Ramaco Resources Class A
METC
$812M
| – | – |
-561,718
| Closed | -$10.1M |
|
157
Magna International
MGA
$18.4B
| – | – |
-255,481
| Closed | -$13.6M |
|
158
Mercury Systems
MRCY
$5.94B
| – | – |
-46,348
| Closed | -$3.38M |
|
159
Microsoft
MSFT
$2.9T
| – | – |
-5,972
| Closed | -$2.89M |
|
160
Nu Skin
NUS
$253M
| – | – |
-596,724
| Closed | -$5.74M |
|
161
Newell Brands
NWL
$2.29B
| – | – |
-126,100
| Closed | -$469K |
|
|
OLPX
162
DELISTED
Olaplex Holdings
OLPX
| – | – |
-3,082,600
| Closed | -$4.13M |
|
|
OPRA
163
Opera Ltd
OPRA
$1.72B
| – | – |
-631,177
| Closed | -$8.94M |
|
164
Oracle
ORCL
$362B
| – | – |
-9,560
| Closed | -$1.86M |
|
165
Ouster
OUST
$2.62B
| – | – |
-145,148
| Closed | -$3.14M |
|
166
Owlet
OWLT
$154M
| – | – |
-343,543
| Closed | -$5.56M |
|
167
Qiagen
QGEN
$8.37B
| – | – |
-90,182
| Closed | -$4.06M |
|
168
Quantum Corp
QMCO
$459M
| – | – |
-477,214
| Closed | -$3.08M |
|
169
Sweetgreen
SG
$749M
| – | – |
-848,085
| Closed | -$5.73M |
|
170
Shoals Technologies Group
SHLS
$1.75B
| – | – |
-72,781
| Closed | -$619K |
|
171
Super Micro Computer
SMCI
$19.8B
| – | – |
-96,544
| Closed | -$2.83M |
|
172
Similarweb
SMWB
$550M
| – | – |
-492,861
| Closed | -$3.69M |
|
173
SharkNinja
SN
$20.8B
| – | – |
-15,907
| Closed | -$1.78M |
|
174
Snap
SNAP
$7.52B
| – | – |
-1,496,410
| Closed | -$12.1M |
|
175
Sphere Entertainment
SPHR
$4.95B
| – | – |
-175,646
| Closed | -$16.7M |
|
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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.