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Portolan Capital Management Portfolio holdings
AUM
$2.67B
Turnover
37.78%
1-Year Est. Return
169.09%
This Fund
S&P 500
This Quarter Est. Return
+69.41%
1 Year Est. Return
+169.09%
3 Year Est. Return
+737.83%
5 Year Est. Return
+1,497.12%
10 Year Est. Return
+21,256.61%
AUM
$2.67B
AUM Growth
+$792M
(+42%)
Cap. Flow
+$21.4M
Cap. Flow % of AUM
Cap. Flow %
0.8%
Top 10 Holdings %
Top 10 Hldgs %
29.02%
Holding
180
New
36
Increased
49
Reduced
59
Closed
32
Avg Time Held
1.3
years
Top 10 Avg Time Held
0.7
years
Top 20 Avg Time Held
0.6
years
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Virtu Financial
VIRT
|
+$48.9M |
| 2 |
Shift4
FOUR
|
+$38.9M |
| 3 |
Qualys
QLYS
|
+$28.6M |
| 4 |
Sportradar
SRAD
|
+$26.5M |
| 5 |
Penguin Solutions Inc
PENG
|
+$24.8M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
PBF Energy
PBF
|
+$38.1M |
| 2 |
TTM Technologies
TTMI
|
+$35.4M |
| 3 |
Crescent Energy
CRGY
|
+$35.1M |
| 4 |
Baidu
BIDU
|
+$33.5M |
| 5 |
Fabrinet
FN
|
+$31.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 44.68% |
| 2 | Consumer Discretionary | 12.13% |
| 3 | Industrials | 12.05% |
| 4 | Healthcare | 11.19% |
| 5 | Financials | 9.77% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | Held Since | |
|---|---|---|---|---|---|---|---|
1
Vishay Precision Group
VPG
$855M
| $151M | 5.66% |
1,008,167
-11,701
| -1% | -$1.09M |
2024 Q4
6 quarters
|
|
|
2
Virtu Financial
VIRT
$5.04B
| $128M | 4.78% |
2,142,215
+930,328
| +77% | +$48.9M |
2025 Q4
2 quarters
|
|
|
3
TTM Technologies
TTMI
$10.8B
| $95M | 3.56% |
507,838
-219,656
| -30% | -$35.4M |
2024 Q1
9 quarters
|
|
4
Modine Manufacturing
MOD
$7.96B
| $83.8M | 3.14% |
313,683
-98,409
| -24% | -$25.9M |
2022 Q4
14 quarters
|
|
|
5
Qualys
QLYS
$6.8B
| $72.8M | 2.73% |
529,807
+290,779
| +122% | +$28.6M |
2025 Q4
2 quarters
|
|
|
6
Shift4
FOUR
$3.12B
| $54.2M | 2.03% |
1,114,116
+899,832
| +420% | +$38.9M |
2023 Q3
11 quarters
|
|
7
Mayville Engineering Co
MEC
$368M
| $48.7M | 1.82% |
1,299,256
+478,120
| +58% | +$12.8M |
2025 Q4
2 quarters
|
|
8
Enova International
ENVA
$4.48B
| $47.9M | 1.79% |
198,795
+117,872
| +146% | +$20.3M |
2020 Q3
23 quarters
|
|
9
Semtech
SMTC
$13.2B
| $47.7M | 1.79% |
294,619
-37,708
| -11% | -$4.93M |
2024 Q1
9 quarters
|
|
10
Celestica
CLS
$38.4B
| $46.3M | 1.73% |
126,856
-71,007
| -36% | -$26.6M |
2023 Q2
12 quarters
|
|
11
United Therapeutics
UTHR
$24.2B
| $44.2M | 1.65% |
81,518
+18,083
| +29% | +$10.2M |
2022 Q2
16 quarters
|
|
12
Genius Sports
GENI
$1.72B
| $42.6M | 1.59% |
7,025,809
+4,234,791
| +152% | +$21.9M |
2022 Q4
14 quarters
|
|
13
Powell Industries
POWL
$6.21B
| $41.7M | 1.56% |
145,631
-81,859
| -36% | -$22.2M |
2024 Q4
6 quarters
|
|
|
14
Penguin Solutions Inc
PENG
$2.99B
| $41.5M | 1.55% |
+546,173
| New | +$24.8M |
2026 Q2
0 quarters
|
|
15
Dave Inc
DAVE
$4.81B
| $39.2M | 1.47% |
105,338
-104
| -0.1% | -$27K |
2025 Q4
2 quarters
|
|
16
Flex
FLEX
$31.9B
| $37.1M | 1.39% |
229,027
-214,101
| -48% | -$26M |
2022 Q3
15 quarters
|
|
17
Allient
ALNT
$1.66B
| $37M | 1.39% |
359,685
+36,232
| +11% | +$2.8M |
2025 Q3
3 quarters
|
|
18
Porch Group
PRCH
$2.11B
| $36.9M | 1.38% |
2,456,451
+311,561
| +15% | +$3.07M |
2024 Q3
7 quarters
|
|
19
Akamai
AKAM
$13B
| $36.7M | 1.37% |
310,361
-113,081
| -27% | -$14.1M |
2025 Q4
2 quarters
|
|
20
Candel Therapeutics
CADL
$640M
| $36M | 1.35% |
3,490,398
+596,073
| +21% | +$4.5M |
2024 Q4
6 quarters
|
|
21
Talen Energy Corp
TLN
$17B
| $34.7M | 1.3% |
90,312
+8,738
| +11% | +$3.2M |
2024 Q3
7 quarters
|
|
22
Regal Rexnord
RRX
$10.6B
| $32.8M | 1.23% |
137,498
+83,523
| +155% | +$17.5M |
2025 Q4
2 quarters
|
|
23
Lantheus
LNTH
$6.55B
| $32M | 1.2% |
288,691
-128,699
| -31% | -$12M |
2023 Q1
13 quarters
|
|
24
Biogen
BIIB
$35.6B
| $30.9M | 1.16% |
142,856
+24,375
| +21% | +$4.66M |
2025 Q4
2 quarters
|
|
25
Veeco
VECO
$2.85B
| $30.4M | 1.14% |
401,639
+148,260
| +59% | +$8.45M |
2026 Q1
1 quarter
|
|
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Portolan Capital Management's Q2 2026 Portfolio in Review
As of Q2 2026, Portolan Capital Management held 180 positions worth $2.67B, up 42% from $1.88B the previous quarter. Its ten largest holdings account for 29% of the portfolio.
Portolan Capital Management's Q2 2026 filing shows 36 new, 49 increased, 59 reduced and 32 closed positions. Its largest new stake was Sportradar: 1,819,949 shares worth $27.2M. The largest sale was PBF Energy, an estimated $38.1M.
By sector, the portfolio is most concentrated in Technology at 45% of assets, up from 34% a quarter earlier, followed by Consumer Discretionary and Industrials.
- Portolan Capital Management's largest Q2 2026 buy was Sportradar: 1,819,949 shares worth $27.2M.
- Portolan Capital Management added most to Virtu Financial in Q2 2026, an estimated $48.9M increase.
- Portolan Capital Management's biggest Q2 2026 reduction was TTM Technologies, cutting an estimated $35.4M.
- Portolan Capital Management fully exited PBF Energy in Q2 2026, selling an estimated $38.1M.
- Portolan Capital Management's ten largest holdings make up 29% of its $2.67B portfolio in Q2 2026.
- Portolan Capital Management opened 36 new positions and closed 32 in Q2 2026.
- Portolan Capital Management's portfolio value rose 42% quarter-over-quarter to $2.67B.
Based on Portolan Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.