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Polaris Capital Management, LLC

Registered adviser
Location
BOSTON, MA
Portfolio Value
Small $947,935,776
Diversification
Diversified
Filing Date
Global Rank
#2,436 / 8,818 ▼ 403 · as of Jun 2026
Top Industry
Banks - Regional 18.6%
Period ended 28 days ago
Filed Oct 21, 2026 · 7d
27 quarters · since Mar 2020

Regulatory profile

From Form ADV, the SEC filer profile, 13D/13G type codes and N-CEN, never from the name.

Holder type
Registered adviser
Form ADV roster, Oct 1, 2026
Form ADV adviser
CRD 106278
Roster of Oct 1, 2026
Regulatory AUM
$5,452,307,694
Main clients
Registered funds and BDCs (50% of AUM)
Private funds
3 funds · Other private funds
Focus by fund count, roster of Oct 1, 2026
$200,264,784 gross assets
Registered funds advised
1 series (0 index, 0 ETFs)
$433,121,532 net assets· N-CEN Dec 31, 2025
LEI
213800S3KTWVNRTWA706
Private funds on Schedule D 7.B.(1)
As filed Mar 28, 2024; SEC's bulk Form ADV archive ends with 2024 filings.
$229,937,445 gross assets in 3 funds Other private funds $229,937,445 (3)
Form ADV history
Monthly rosters from Dec 2019; each row is a run with the same figures, newest first.
Rosters Regulatory AUM Main clients
Feb 2026 to Oct 2026 $5,452,307,694 Registered funds and BDCs (50%)
Apr 2025 to Jan 2026 $8,901,029,329 Registered funds and BDCs (51%)
Apr 2024 to Mar 2025 $11,775,149,425 Diversified
May 2023 to Mar 2024 $12,425,022,064 Diversified
Apr 2023 $12,425,022,064 Diversified
Mar 2022 to Mar 2023 $16,198,252,799 Diversified
3 earlier changes not shown.

Portfolio style

Measured from the filed 13F common-share book for Jun 30, 2026, the newest measured quarter, never from the firm's own description.

Style
Diversified active
Top 10 weight 48.0%, 28.7 effective positions, active share 94.7% against the S&P MidCap 400 as of 2026-06-30; it meets none of the index-like, systematic-like or concentrated tests
Turnover
Low turnover
20.3% over the last four quarters (under 30%)
Horizon
Long horizon
Value-weighted holding period 17.8 quarters (12+), a floor since 36.4% of the book was already held when coverage starts

Closest benchmark: the S&P MidCap 400 as of 2026-06-30, active share 94.7%; sector active share 48.8% against the combined 13F book's sector weights.

Over time 26 measured quarters

How the bands are measured

Style bands measure the filed 13F common-share book each closed quarter, tested in this order. Unknown: under $10,000,000 of valued equity or 5 stocks. Index-like (100+ stocks): active share of 20% or less against the closest benchmark, which is the S&P 500, S&P MidCap 400, S&P SmallCap 600, Russell 1000, Russell 2000, Nasdaq-100 or Dow Jones Industrial Average (weighted by an index-tracking fund's reported holdings or the index's constituents nearest the quarter end, over the names resolved to companies, and only when those are 90%+ of its weight) or every 13F filer's combined book, or index series holding 80%+ of the registered fund assets it advises (N-CEN) and equal to 50%+ of its book. Systematic-like: 500+ stocks, 100%+ annual turnover and a top 10 weight of 25% or less. Concentrated: a top 10 weight of 60%+ or 12 or fewer effective positions. Diversified active: none of these. Turnover is the smaller of buys and sells over average equity value, summed over four quarters: low under 30%, high 100%+. Horizon is the value-weighted number of quarters each position has been held: short under 4, long 12+.

Clone Performance

Build a hypothetical price-return history from this filer's public 13F holdings.

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Portfolio Concentration

85 tracked positions · as of Sep 30, 2026 · Δ vs Jun 30, 2026
Top Position
8.3%
+0.1 pts
Top 5
32.5%
+0.2 pts
Top 10
49.2%
+1.2 pts
HHI
355
Dec 2023 → Sep 2026 · range 302 – 431
Diversified+6

Portfolio Trend

27 quarters · across all stocks

Sector Breakdown

As of Sep 30, 2026
Sector % Portfolio Value
Financial Services 27.8% $263,416,466
Healthcare 26.7% $252,786,173
Consumer Cyclical 11.9% $112,494,508
Technology 9.2% $87,266,232
Basic Materials 7.2% $68,131,228
Energy 5.7% $54,456,138
Consumer Defensive 5.0% $47,809,572
Industrials 3.4% $31,919,640
Utilities 1.8% $16,658,285
Real Estate 1.4% $12,997,534

Last Quarter's Activity

Export CSV
Sep 30, 2026 vs Jun 30, 2026

Added To

Positions the filer increased
7 positions
Ticker Δ Shares Shares Value Open

Trimmed

Positions the filer reduced
25 positions
Ticker Δ Shares Shares Value Open

New Positions

Positions the filer opened this quarter
5 positions
Ticker Shares Value Open

Sold Out

Positions the filer fully exited
3 positions
Ticker Shares Value Open
— 276,538 $21,133,033

Portfolio Positions

Export CSV View 13F filing
85 tracked positions · $947,935,776 total · filing declares 86 positions · $953,424,763 · as of Sep 30, 2026
Showing 1–50 of 85 positions by value · page 1 of 2
Ticker Company Shares Value (USD) % of Portfolio History

Showing the top 50 of 85 positions. Create a free account to see every position, past quarters, search, filters and CSV export.

Covers the securities this platform tracks: U.S.-listed common stock and the put/call positions reported on it. A 13F can also report security types outside that coverage — preferred shares, bonds, warrants, untracked share classes — so the filing's own declared total can exceed the figures above. The source filing is linked at the top of this table.