Skip to main content

ALETHEA CAPITAL MANAGEMENT, LLC

Registered adviser
Location
MERCER ISLAND, WA
Portfolio Value
Small $239,164,015
Diversification
Highly concentrated
Filing Date
Global Rank
#5,797 / 8,807 ▼ 65
Top Industry
Biotechnology 88.6%
3Y Alpha vs SPY
+2.5%
Period ended 4 months ago
Filed Aug 14, 2026 · 2mo
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 156500
Roster of Oct 1, 2026
Regulatory AUM
$302,636,121
Main clients
Individuals and high net worth (66% of AUM)
Private funds
2 funds · Venture capital funds
$85,311,296 gross assets

Portfolio style

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

Style
Concentrated
The top 10 positions are 93.0% of the book (60%+)
Turnover
Medium turnover
40.0% over the last four quarters (30% to under 100%)
Horizon
Long horizon
Value-weighted holding period 20.6 quarters (12+), a floor since 66.4% of the book was already held when coverage starts

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 against every 13F filer's combined book at 20% or less, 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.

View clone backtest

Portfolio Concentration

41 tracked positions · as of Jun 30, 2026 · Δ vs Mar 31, 2026
Top Position
66.4%
+9.4 pts
Top 5
90.5%
−8.7 pts
Top 10
93.0%
−7.0 pts
HHI
4,667
Sep 2023 → Jun 2026 · range 4,088 – 6,855
Highly concentrated+429

Portfolio Trend

26 quarters · across all stocks

Sector Breakdown

As of Jun 30, 2026
Sector % Portfolio Value
Healthcare 79.3% $189,687,992
Unclassified 12.4% $29,739,562
Consumer Defensive 1.8% $4,372,050
Energy 1.5% $3,505,584
Technology 1.1% $2,557,367
Utilities 1.0% $2,302,708
Communication Services 0.8% $1,832,969
Financial Services 0.7% $1,593,385
Consumer Cyclical 0.5% $1,290,006
Real Estate 0.4% $912,114
Industrials 0.4% $905,819
Basic Materials 0.2% $464,459

Last Quarter's Activity

Export CSV
Jun 30, 2026 vs Mar 31, 2026

Added To

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

Trimmed

Positions the filer reduced
4 positions
Ticker Δ Shares Shares Value Open
— −315,512 324,526 $29,739,562

New Positions

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

Sold Out

Positions the filer fully exited
1 positions
Ticker Shares Value Open

Portfolio Positions

Export CSV View 13F filing
41 tracked positions · $239,164,015 total · filing declares 41 positions · $241,411,144 · as of Jun 30, 2026
Ticker Company Shares Value (USD) % of Portfolio History
324,526 $29,739,562 12.43%
12,000 $37,320 0.02%

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.