Portolan Capital Management, LLC
โขCIK: 1350290โขFiling: Q4 2025
**Portolan Capital Management, LLC** manages $1.9B across a diversified portfolio of 155 positions. The firm maintains significant exposure to technology and growth sectors, highlighted by top holdings including TTMI at $79.1M and MOD at $71.6M. Further notable allocations include CSTL ($67.3M), CLS ($50.9M), and AKAM ($45.7M). This concentrated approach suggests a conviction-driven strategy targeting outsized returns from key market segments.
Total AUM
$1.9B
QoQ Performance
+1.0%
Positions
155
Top 10 Concentration
26.4%
Latest Filing
Q4 2025
Top Holdings Allocation
TTMI4.2%
MOD3.8%
CSTL3.6%
CLS2.7%
AKAM2.5%
REAX2.1%
SMTC2.0%
BIDUN1.8%
๐ Biggest Buys
๐ Biggest Sells
Sector Breakdown
Other98.5%
Materials0.8%
Technology0.7%
๐ช Exited Positionssold since Q3 2025
+16 more exited positions
Changes from Q3 2025
NEW57 new positions
โ34 increased
โ55 decreased
Historical Filings
Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023