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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
+8.02%
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
$1.87B
AUM Growth
+$18.4M
Cap. Flow
-$10.9M
Cap. Flow %
-0.58%
Top 10 Hldgs %
26.36%
Holding
176
New
57
Increased
34
Reduced
55
Closed
21

Top Buys

Rank Stock Value
1
AKAM icon
Akamai
AKAM
+$43.1M
2
BIDU icon
Baidu
BIDU
+$32.2M
3
FAF icon
First American
FAF
+$20.1M
4
FOUR icon
Shift4
FOUR
+$19.7M
5
REAX icon
Real Brokerage
REAX
+$19.4M

Top Sells

Rank Stock Value
1
DBRG icon
DigitalBridge
DBRG
+$55.8M
2
ELF icon
e.l.f. Beauty
ELF
+$29.1M
3
KTOS icon
Kratos Defense & Security Solutions
KTOS
+$24.7M
4
CLS icon
Celestica
CLS
+$23.9M
5
POWL icon
Powell Industries
POWL
+$23.3M

Sector Composition

Rank Sector Weight
1 Technology 39.09%
2 Healthcare 17.39%
3 Consumer Discretionary 11.39%
4 Communication Services 7.96%
5 Financials 7.32%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
TTMI icon
1
TTM Technologies
TTMI
$13.6B
$79.1M 4.24%
1,146,682
-42,140
-4% -$2.75M
MOD icon
2
Modine Manufacturing
MOD
$12.8B
$71.6M 3.83%
535,947
-66,515
-11% -$9.91M
CSTL icon
3
Castle Biosciences
CSTL
$749M
$67.3M 3.6%
1,729,463
+214,352
+14% +$6.91M
CLS icon
4
Celestica
CLS
$35.1B
$50.9M 2.73%
172,275
-79,281
-32% -$23.9M
AKAM icon
5
Akamai
AKAM
$16.8B
$45.7M 2.45%
+524,321
New +$43.1M
REAX icon
6
Real Brokerage
REAX
$368M
$39.3M 2.11%
10,779,843
+5,010,640
+87% +$19.4M
SMTC icon
7
Semtech
SMTC
$11.7B
$37.5M 2.01%
508,655
-160,207
-24% -$11.4M
BIDU icon
8
Baidu
BIDU
$35.8B
$34.5M 1.85%
263,681
+259,101
+5,657% +$32.2M
VPG icon
9
Vishay Precision Group
VPG
$1.39B
$33.8M 1.81%
877,669
+54,371
+7% +$1.92M
GENI icon
10
Genius Sports
GENI
$1.73B
$32.4M 1.73%
2,938,119
-674,692
-19% -$7.36M
LNTH icon
11
Lantheus
LNTH
$6.82B
$31.7M 1.7%
475,789
+178,581
+60% +$10.4M
FOUR icon
12
Shift4
FOUR
$3.84B
$29.5M 1.58%
468,063
+279,302
+148% +$19.7M
QTRX icon
13
Quanterix
QTRX
$173M
$28.8M 1.54%
4,525,553
+265,702
+6% +$1.65M
FLEX icon
14
Flex
FLEX
$43.4B
$28.2M 1.51%
466,913
-128,873
-22% -$7.96M
TLN
15
Talen Energy Corp
TLN
$17.2B
$28.1M 1.51%
74,984
-19,733
-21% -$7.67M
GOOS
16
Canada Goose Holdings
GOOS
$868M
$27.7M 1.48%
2,138,904
-35,097
-2% -$467K
WRBY icon
17
Warby Parker
WRBY
$3.01B
$26.8M 1.44%
1,232,173
+586,085
+91% +$12.8M
ZETA icon
18
Zeta Global
ZETA
$4.77B
$26.8M 1.44%
1,318,797
+293,602
+29% +$5.48M
POWL icon
19
Powell Industries
POWL
$8.46B
$25.2M 1.35%
237,348
-207,387
-47% -$23.3M
LPTH icon
20
Lightpath Technologies
LPTH
$680M
$25.2M 1.35%
2,332,184
+700,562
+43% +$5.68M
BELFB
21
Bel Fuse Inc Class B
BELFB
$3.88B
$23.7M 1.27%
139,513
+15,747
+13% +$2.46M
CLBT icon
22
Cellebrite
CLBT
$3.55B
$23.2M 1.24%
1,287,287
-1,132,375
-47% -$20.3M
KTOS icon
23
Kratos Defense & Security Solutions
KTOS
$8.88B
$22.3M 1.2%
294,006
-302,100
-51% -$24.7M
LUXE
24
LuxExperience B.V.
LUXE
$1.1B
$22.2M 1.19%
2,660,674
+1,099,408
+70% +$9.81M
LASR icon
25
nLIGHT
LASR
$3.95B
$22.1M 1.19%
590,433
-179,355
-23% -$5.99M
1
2 3 4 5

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Portolan Capital Management's Q4 2025 Portfolio in Review

As of Q4 2025, Portolan Capital Management held 176 positions worth $1.87B, up 1% from $1.85B the previous quarter. Its ten largest holdings account for 26% of the portfolio.

Portolan Capital Management's Q4 2025 filing shows 57 new, 34 increased, 55 reduced and 21 closed positions. Its largest new stake was Akamai: 524,321 shares worth $45.7M. The largest sale was DigitalBridge, an estimated $55.8M.

By sector, the portfolio is most concentrated in Technology at 39% of assets, up from 36% a quarter earlier, followed by Healthcare and Consumer Discretionary.

  • Portolan Capital Management's largest Q4 2025 buy was Akamai: 524,321 shares worth $45.7M.
  • Portolan Capital Management added most to Baidu in Q4 2025, an estimated $32.2M increase.
  • Portolan Capital Management's biggest Q4 2025 reduction was DigitalBridge, cutting an estimated $55.8M.
  • Portolan Capital Management fully exited Wolverine World Wide in Q4 2025, selling an estimated $21.9M.
  • Portolan Capital Management's ten largest holdings make up 26% of its $1.87B portfolio in Q4 2025.
  • Portolan Capital Management opened 57 new positions and closed 21 in Q4 2025.
  • Portolan Capital Management's portfolio value rose 1% quarter-over-quarter to $1.87B.

Based on Portolan Capital Management's 13F filing for Q4 2025, filed 17 Feb 2026.