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IRIDIAN ASSET MANAGEMENT LLC/CT

Registered adviser
Location
WESTPORT, CT
Portfolio Value
Small $290,996,898
Diversification
Diversified
Filing Date
Global Rank
#5,180 / 8,807 ▼ 216
Top Industry
Biotechnology 18.8%
Period ended 4 months ago
Filed Jul 29, 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 104550
Roster of Oct 1, 2026
Regulatory AUM
$280,161,820
Main clients
Pooled investment vehicles (59% of AUM)
Private funds
3 funds · Hedge funds
Focus by fund count, roster of Oct 1, 2026
$145,679,289 gross assets
LEI
549300A9VAL70VQYHE09
Private funds on Schedule D 7.B.(1)
As filed Mar 20, 2024; SEC's bulk Form ADV archive ends with 2024 filings.
$156,345,130 gross assets in 4 funds Hedge funds $84,582,252 (2) Other private funds $71,762,878 (2)
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 $280,161,820 Pooled investment vehicles (59%)
Apr 2025 to Mar 2026 $366,873,060 Pooled investment vehicles (51%)
Apr 2024 to Mar 2025 $372,306,405 Diversified
May 2023 to Mar 2024 $895,701,169 Pooled investment vehicles (69%)
Apr 2023 $895,701,169 Pooled investment vehicles (69%)
Apr 2022 to Mar 2023 $1,698,287,827 Pooled investment vehicles (52%)
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 67.2% of the book (60%+)
Turnover
Medium turnover
46.4% over the last four quarters (30% to under 100%)
Horizon
Long horizon
Value-weighted holding period 20.3 quarters (12+), a floor since 25.4% of the book was already held when coverage starts

Closest benchmark: the S&P MidCap 400 as of 2026-06-30, active share 98.8%; sector active share 54.0% 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

41 tracked positions · as of Jun 30, 2026 · Δ vs Mar 31, 2026
Top Position
11.3%
+1.6 pts
Top 5
43.7%
+3.5 pts
Top 10
67.2%
+4.8 pts
HHI
567
Sep 2023 → Jun 2026 · range 486 – 850
Diversified+68

Portfolio Trend

26 quarters · across all stocks

Sector Breakdown

As of Jun 30, 2026
Sector % Portfolio Value
Consumer Cyclical 34.5% $100,348,092
Healthcare 21.1% $61,310,167
Consumer Defensive 17.5% $50,865,419
Technology 12.2% $35,447,379
Financial Services 4.5% $13,110,059
Basic Materials 4.0% $11,564,523
Energy 3.9% $11,429,427
Industrials 2.2% $6,385,583
Communication Services 0.2% $536,249

Last Quarter's Activity

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Jun 30, 2026 vs Mar 31, 2026

Added To

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

Trimmed

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

New Positions

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

Sold Out

Positions the filer fully exited
3 positions
Ticker Shares Value Open

Portfolio Positions

Export CSV View 13F filing
41 tracked positions · $290,996,898 total · filing declares 45 positions · $291,054,769 · 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.