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LONGFELLOW INVESTMENT MANAGEMENT CO LLC

Registered adviser
Location
BOSTON, MA
Portfolio Value
Small $489,081,250
Diversification
Diversified
Filing Date
Global Rank
#3,890 / 8,818 ▼ 261
Top Industry
Oil & Gas Midstream 44.2%
Period ended 4 months ago
Filed Aug 6, 2026 · 3mo
26 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 104945
Roster of Oct 1, 2026
Regulatory AUM
$23,442,074,430
Main clients
Diversified
LEI
254900OQCWZH3CTEME48
Private funds on Schedule D 7.B.(1)
As filed Apr 10, 2024; SEC's bulk Form ADV archive ends with 2024 filings.
No private funds listed.
Form ADV history
Monthly rosters from Dec 2019; each row is a run with the same figures, newest first.
Rosters Regulatory AUM Main clients
Apr 2026 to Oct 2026 $23,442,074,430 Diversified
Apr 2025 to Mar 2026 $18,925,792,512 Diversified
Apr 2024 to Mar 2025 $17,000,577,298 Diversified
May 2023 to Mar 2024 $16,792,077,162 Diversified
Apr 2023 $16,792,077,162 Diversified
Apr 2022 to Mar 2023 $18,128,008,950 Diversified
3 earlier changes not shown.

Portfolio style

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

Style
Diversified active
Top 10 weight 51.6%, 27.6 effective positions, active share 86.5% against the S&P 500 as of 2026-06-30; it meets none of the index-like, systematic-like or concentrated tests
Turnover
Medium turnover
49.5% over the last four quarters (30% to under 100%)
Horizon
Long horizon
Value-weighted holding period 16.8 quarters (12+)

Closest benchmark: the S&P 500 as of 2026-06-30, active share 86.5%; sector active share 48.4% 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

239 tracked positions · as of Jun 30, 2026 · Δ vs Mar 31, 2026
Top Position
8.6%
−0.2 pts
Top 5
36.8%
−0.6 pts
Top 10
51.6%
−1.7 pts
HHI
362
Sep 2023 → Jun 2026 · range 362 – 745
Diversified−13

Portfolio Trend

26 quarters · across all stocks

Sector Breakdown

As of Jun 30, 2026
Sector % Portfolio Value
Energy 44.6% $218,086,519
Financial Services 11.9% $58,359,353
Communication Services 8.0% $39,243,915
Industrials 6.2% $30,322,322
Real Estate 5.2% $25,558,725
Consumer Defensive 5.2% $25,348,470
Healthcare 4.7% $23,203,426
Technology 4.7% $22,893,932
Consumer Cyclical 3.3% $16,177,620
Basic Materials 3.3% $16,013,804
Unclassified 2.6% $12,491,753
Utilities 0.3% $1,381,411

Last Quarter's Activity

Export CSV
Jun 30, 2026 vs Mar 31, 2026

Added To

Positions the filer increased
25 positions
Ticker Δ Shares Shares Value Open
— +4,898 10,365 $152,676

Trimmed

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

New Positions

Positions the filer opened this quarter
25 positions
Ticker Shares Value Open
— 9,070 $152,920
— 10,972 $150,974
— 611 $81,098
— 2,755 $78,434
— 2,932 $76,848
— 8,173 $76,744
— 3,015 $75,013
— 5,671 $74,914
— 159 $56,370

Sold Out

Positions the filer fully exited
25 positions
Ticker Shares Value Open
— 6,253 $154,574
— 1,512 $114,292
— 429 $76,306
— 4,013 $75,725
— 1,610 $75,235
— 1,860 $74,828
— 3,106 $73,457
— 942 $10,353

Portfolio Positions

Export CSV View 13F filing
239 tracked positions · $489,081,250 total · filing declares 244 positions · $489,087,343 · as of Jun 30, 2026
Showing 1–50 of 239 positions by value · page 1 of 5
Ticker Company Shares Value (USD) % of Portfolio History
118,150 $2,957,294 0.60%

Showing the top 50 of 239 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.