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Omega Fund Management, LLC

Registered adviser
Location
Boston, MA
Portfolio Value
Small $185,685,947
Diversification
Moderately concentrated
Filing Date
Global Rank
#6,613 / 8,807 ▼ 369
Top Industry
Biotechnology 74.9%
3Y Alpha vs SPY
-30.9%
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 157753
Roster of Oct 1, 2026
Regulatory AUM
$1,713,751,848
Main clients
Pooled investment vehicles (100% of AUM)
Private funds
5 funds · Venture capital funds
$914,413,202 gross assets
Private funds on Schedule D 7.B.(1)
As filed Mar 30, 2024; SEC's bulk Form ADV archive ends with 2024 filings.
$693,680,918 gross assets in 8 funds Private equity funds $693,680,918 (8)
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 $1,713,751,848 Pooled investment vehicles (100%)
Apr 2025 to Mar 2026 $1,799,390,730 Pooled investment vehicles (100%)
Apr 2024 to Mar 2025 $1,592,308,964 Pooled investment vehicles (100%)
May 2023 to Mar 2024 $1,394,723,335 Pooled investment vehicles (100%)
Apr 2023 $1,394,723,335 Pooled investment vehicles (100%)
Apr 2022 to Mar 2023 $1,911,362,032 Pooled investment vehicles (100%)
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
Concentrated
The top 10 positions are 100.0% of the book (60%+)
Turnover
Low turnover
21.9% over the last four quarters (under 30%)
Horizon
Medium horizon
Value-weighted holding period 10.6 quarters (4 to under 12)

Closest benchmark: the Russell 2000 as of 2026-06-30, active share 99.8%; sector active share 90.6% 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

10 tracked positions · as of Jun 30, 2026 · Δ vs Mar 31, 2026
Top Position
29.1%
−0.0 pts
Top 5
92.5%
+3.4 pts
Top 10
100.0%
0.0 pts
HHI
1,980
Sep 2023 → Jun 2026 · range 1,462 – 4,980
Moderately concentrated+102

Portfolio Trend

26 quarters · across all stocks

Sector Breakdown

As of Jun 30, 2026
Sector % Portfolio Value
Healthcare 100.0% $185,685,947

Last Quarter's Activity

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Jun 30, 2026 vs Mar 31, 2026

Added To

Positions the filer increased
No qualifying positions this quarter.

Trimmed

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

New Positions

Positions the filer opened this quarter
1 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
10 tracked positions · $185,685,947 total · filing declares 10 positions · $185,685,956 · as of Jun 30, 2026
Ticker Company Shares Value (USD) % of Portfolio History

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.