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O'SHAUGHNESSY ASSET MANAGEMENT, LLC

Registered adviser
Location
Stamford, CT
Portfolio Value
Large $21,696,220,098
Diversification
Diversified
Filing Date
Global Rank
#338 / 8,819 ▼ 30
Top Industry
Semiconductors 10.8%
Period ended 4 months ago
Filed Aug 13, 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 144594
Roster of Oct 1, 2026
Regulatory AUM
$19,782,138,121
Main clients
Individuals and high net worth (81% of AUM)
Registered funds advised
1 series (0 index, 0 ETFs)
$221,618,595 net assets· N-CEN Jul 31, 2025
Private funds on Schedule D 7.B.(1)
As filed Dec 17, 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
Jan 2026 to Oct 2026 $19,782,138,121 Individuals and high net worth (81%)
Jan 2025 to Dec 2025 $12,599,503,777 Individuals and high net worth (73%)
Jan 2024 to Dec 2024 $7,983,580,249 Individuals and high net worth (55%)
May 2023 to Dec 2023 $6,304,455,763 Diversified
Jan 2023 to Apr 2023 $6,304,455,763 Diversified
Mar 2022 to Dec 2022 $6,885,813,750 Diversified
4 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 26.7%, 84.0 effective positions, active share 28.2% against every 13F filer's combined book; it meets none of the index-like, systematic-like or concentrated tests
Turnover
Low turnover
18.6% over the last four quarters (under 30%)
Horizon
Long horizon
Value-weighted holding period 23.0 quarters (12+), a floor since 73.7% of the book was already held when coverage starts

Closest benchmark: every 13F filer's combined book, active share 28.2%; sector active share 8.9% 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

2,579 tracked positions · as of Jun 30, 2026 · Δ vs Mar 31, 2026
Top Position
5.5%
+0.1 pts
Top 5
20.1%
+0.3 pts
Top 10
27.0%
+0.3 pts
HHI
120
Sep 2023 → Jun 2026 · range 70 – 120
Diversified+6

Portfolio Trend

26 quarters · across all stocks

Sector Breakdown

As of Jun 30, 2026
Sector % Portfolio Value
Technology 26.9% $5,826,867,931
Financial Services 15.6% $3,395,292,835
Unclassified 11.2% $2,437,553,659
Consumer Cyclical 8.9% $1,941,550,351
Industrials 8.5% $1,835,173,532
Healthcare 7.7% $1,660,295,116
Communication Services 6.6% $1,428,871,128
Consumer Defensive 5.3% $1,143,432,369
Energy 4.3% $924,942,686
Basic Materials 2.5% $551,640,938
Real Estate 1.4% $294,206,718
Utilities 1.2% $256,392,835

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

Trimmed

Positions the filer reduced
25 positions
Ticker Δ Shares Shares Value Open
— −160,246 409,280 $10,911,404

New Positions

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

Sold Out

Positions the filer fully exited
25 positions
Ticker Shares Value Open
— 220,241 $2,982,063
— 135,483 $2,238,179
— 60,626 $2,130,398
— 24,905 $1,990,906
— 29,080 $1,358,908
— 11,752 $888,334

Portfolio Positions

Export CSV View 13F filing
2,579 tracked positions · $21,696,220,098 total · filing declares 2,929 positions · $21,693,502,145 · as of Jun 30, 2026
Showing 1–50 of 2,579 positions by value · page 1 of 52
Ticker Company Shares Value (USD) % of Portfolio History

Showing the top 50 of 2,579 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.