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55I, LLC

Registered adviser
Location
Boston, MA
Portfolio Value
Mid $3,420,458,797
Diversification
Highly concentrated
Filing Date
Global Rank
#662 / 6,826 ▲ 108 · as of Sep 2022
Top Industry
Asset Management 13.3%
Period ended 4 years ago
Filed Nov 14, 2022 · 3y
11 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 286620
Roster of Oct 1, 2026
Regulatory AUM
$36,740,224,268
Main clients
Other investment advisers (94% of AUM)
LEI
9845007ADCEA70F1F924
Private funds on Schedule D 7.B.(1)
As filed Sep 20, 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 $36,740,224,268 Other investment advisers (94%)
Apr 2025 to Mar 2026 $27,921,787,334 Other investment advisers (93%)
Apr 2024 to Mar 2025 $17,476,639,771 Other investment advisers (92%)
May 2023 to Mar 2024 $8,633,130,314 Other investment advisers (87%)
Apr 2023 $8,633,130,314 Other investment advisers (87%)
Apr 2022 to Mar 2023 $4,647,837,373 Other investment advisers (98%)
3 earlier changes not shown.

Portfolio style

Measured from the filed 13F common-share book for Sep 30, 2022, never from the firm's own description.

Style
Concentrated
The top 10 positions are 83.2% of the book (60%+)
Turnover
Medium turnover
47.1% over the last four quarters (30% to under 100%)
Horizon
Horizon unknown
The value-weighted holding period is at least 9.0 quarters, but 61.8% of the book was already held when coverage starts

Closest benchmark: every 13F filer's combined book, active share 80.2%; sector active share 76.8% against the combined 13F book's sector weights.

Over time 11 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

573 tracked positions · as of Sep 30, 2022 · Δ vs Jun 30, 2022
Top Position
56.6%
−4.1 pts
Top 5
75.4%
−6.1 pts
Top 10
83.1%
−7.1 pts
HHI
3,338
Mar 2020 → Sep 2022 · range 1,207 – 3,852
Highly concentrated−515

Portfolio Trend

11 quarters · across all stocks

Sector Breakdown

As of Sep 30, 2022
Sector % Portfolio Value
Unclassified 87.5% $2,993,387,203
Financial Services 3.0% $104,241,932
Technology 2.8% $94,567,548
Healthcare 1.8% $61,885,677
Consumer Cyclical 1.2% $42,568,809
Communication Services 0.9% $29,552,009
Consumer Defensive 0.9% $29,361,851
Industrials 0.8% $28,444,723
Energy 0.4% $14,686,413
Utilities 0.3% $9,068,913
Real Estate 0.2% $6,836,521
Basic Materials 0.2% $5,857,198

Last Quarter's Activity

Export CSV
Sep 30, 2022 vs Jun 30, 2022

Added To

Positions the filer increased
25 positions
Ticker Δ Shares Shares Value Open
— +137,869 177,825 $6,056,719

Trimmed

Positions the filer reduced
25 positions
Ticker Δ Shares Shares Value Open
— −234,704 359,881 $6,570,707

New Positions

Positions the filer opened this quarter
25 positions
Ticker Shares Value Open
— 230,468 $13,300,308
— 35,263 $1,011,695
— 19,760 $700,887

Sold Out

Positions the filer fully exited
21 positions
Ticker Shares Value Open
— 2,040 $220,381
— 1,578 $206,639

Portfolio Positions

Export CSV View 13F filing
573 tracked positions · $3,420,458,797 total · filing declares 580 positions · $3,579,271,000 · as of Sep 30, 2022
Showing 1–50 of 573 positions by value · page 1 of 12
Ticker Company Shares Value (USD) % of Portfolio History
230,468 $13,300,308 0.39%

Showing the top 50 of 573 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.