Portolan Capital Management, LLC
All 13F Filings
- Location
- Boston, MA
- Most recent 13F
- Q2 2026
- Holdings value ($000)
- 2,670,929
- Description
- —
- Website
- —
- Founded
- —
- Chairman
- —
- CEO
- —
- All SEC filings
- View on sec.gov
Sector allocation over time (stocks only)
Stacked by quarter. Hover to see detailed sector breakdown for any quarter.
| Quarter | Date Filed | Holdings | Value ($000) | Form Type | Name |
|---|---|---|---|---|---|
| Q2 2026 | 8/14/2026 | 148 | 2,670,929 | 13F-HR | Portolan Capital Management, LLC |
| Q1 2026 | 5/15/2026 | 144 | 1,878,963 | 13F-HR | Portolan Capital Management, LLC |
| Q4 2025 | 2/17/2026 | 155 | 1,866,424 | 13F-HR | Portolan Capital Management, LLC |
| Q3 2025 | 11/13/2025 | 119 | 1,848,024 | 13F-HR | Portolan Capital Management, LLC |
| Q2 2025 | 8/13/2025 | 118 | 1,594,953 | 13F-HR | Portolan Capital Management, LLC |
| Q1 2014 | 5/15/2014 | 139 | 434,359 | 13F-HR | Portolan Capital Management, LLC |
| Q4 2013 | 2/13/2014 | 119 | 451,005 | 13F-HR | Portolan Capital Management, LLC |
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Money flow by instrument (QoQ, ex-options)
| Type | Value ($000) | Share % | Inflow | Outflow | Net |
|---|---|---|---|---|---|
| Stocks | 2.671 M | 100.0% | 792 K | 0 | 792 K |
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Fund Snapshot
Q2 2026
Latest filed
8/14/2026
Total value ($000)
2,670,929
Holdings
148
QoQ value change ($000)
791,966
(42.1%)
Value = total reported 13F value ($000), Holdings = number of positions.
13F Value over time
Holdings count over time
Sector allocation (latest, stocks only)
Methodology:
sector allocation is stocks-only;
instrument flow table is ex-options;
options exposure is shown separately.
Details.