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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 | |
|---|---|---|---|---|---|---|
76
Ciena
CIEN
$56.2B
| $7.17M | 0.38% |
18,466
-38,015
| -67% | -$11.6M |
|
77
Ranpak Holdings
PACK
$600M
| $6.95M | 0.37% |
1,947,681
-3,049
| -0.2% | -$15K |
|
|
VNET
78
VNET Group
VNET
$2.23B
| $6.93M | 0.37% |
825,490
+18,690
| +2% | +$198K |
|
79
On Holding
ONON
$12.2B
| $6.89M | 0.37% |
+202,444
| New | +$8.84M |
|
80
Nextpower Inc
NXT
$15.9B
| $6.84M | 0.36% |
56,747
-23,042
| -29% | -$2.55M |
|
81
Frequency Electronics
FEIM
$712M
| $6.65M | 0.35% |
150,141
+37,065
| +33% | +$1.89M |
|
82
GeneDx Holdings
WGS
$1.86B
| $6.59M | 0.35% |
102,575
+46,799
| +84% | +$4.27M |
|
83
Take-Two Interactive
TTWO
$43.4B
| $6.36M | 0.34% |
32,219
-5,468
| -15% | -$1.19M |
|
84
Procept Biorobotics
PRCT
$1.01B
| $6.3M | 0.34% |
251,716
-3,402
| -1% | -$95.9K |
|
85
Northern Oil and Gas
NOG
$2.4B
| $5.97M | 0.32% |
+204,244
| New | +$5.29M |
|
86
CareDx
CDNA
$1.95B
| $5.91M | 0.31% |
340,352
-418,423
| -55% | -$7.92M |
|
87
BlackLine
BL
$1.63B
| $5.88M | 0.31% |
+159,026
| New | +$6.85M |
|
88
Meta Platforms (Facebook)
META
$1.59T
| $5.87M | 0.31% |
10,261
-57
| -0.6% | -$36.5K |
|
89
Celsius Holdings
CELH
$7.28B
| $5.84M | 0.31% |
+164,597
| New | +$7.8M |
|
90
DigitalBridge
DBRG
$2.92B
| $5.75M | 0.31% |
373,130
-451,816
| -55% | -$6.95M |
|
91
IES Holdings
IESC
$13.4B
| $5.66M | 0.3% |
11,869
+77
| +0.7% | +$35.3K |
|
92
Tower Semiconductor
TSEM
$28.2B
| $5.62M | 0.3% |
32,043
-116,482
| -78% | -$15.7M |
|
93
Ambarella
AMBA
$3.03B
| $5.6M | 0.3% |
108,749
+54,507
| +100% | +$3.4M |
|
94
Century Aluminum
CENX
$4.49B
| $5.58M | 0.3% |
+95,039
| New | +$4.76M |
|
95
Talos Energy
TALO
$2.55B
| $5.43M | 0.29% |
344,549
+225,449
| +189% | +$2.89M |
|
|
TLX
96
Telix Pharmaceuticals
TLX
$3.5B
| $5.18M | 0.28% |
+541,267
| New | +$4.12M |
|
|
MIAX
97
Miami International Holdings
MIAX
$4.05B
| $5.01M | 0.27% |
+128,819
| New | +$5.31M |
|
98
AeroVironment
AVAV
$7.61B
| $4.92M | 0.26% |
26,880
-49,078
| -65% | -$12.9M |
|
99
Viavi Solutions
VIAV
$10.4B
| $4.85M | 0.26% |
+145,844
| New | +$3.85M |
|
100
XPeng
XPEV
$12.3B
| $4.71M | 0.25% |
275,432
+178,505
| +184% | +$3.31M |
|
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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.