IRIDIAN ASSET MANAGEMENT LLC/CT

Q3 2026 13F-HR Holdings

Location
Westport, CT
Holdings as of
9/30/2026
Date filed
10/23/2026
Form type
13F-HR
Num holdings
41
Total value ($000)
$274,904
Net value change ($000)
-16,151 (-5.5%)
New positions
3
Sold out positions
3
Turnover %
2.2%
Sector allocation + QoQ delta (equities-only)
Prev filing: 7/29/2026 Next filing: — SEC filing

Snapshot: Change Analysis

Compared to Q2 2026
Methodology: sector metrics are equities-only; instrument mix chart is ex-options; options exposure is shown separately. Why this matters.
Top Adds (Value $000, Stocks/ETFs)
PGEN 3,251 14.1%
NKTR 3,024 111.6%
NVCT 2,463 17.2%
XYL 2,097 NEW
YOU 1,692 NEW
FLS 1,384 199.7%
INVA 862 NEW
BALL 608 29.4%
HGV 545 2.3%
ABVX 463 37.9%
Top Reduces (Value $000, Stocks/ETFs)
LAD -4,895 -26.4%
AXSM -3,409 -29.1%
FLEX -2,944 -34.0%
TNL -2,741 -18.3%
HLF -2,349 -8.6%
NESR -2,124 -31.2%
ELV -1,811 -31.2%
KPLT -1,752 -30.4%
BILL -1,517 -22.3%
GEN -1,485 -39.2%
Instrument mix + QoQ Δ (ex-options)
How this table is calculated: SEC VALUE ($000) is used as reported. For derivatives (PUT/CALL/WARRANT/RIGHT), SEC value represents reported underlying exposure, not premium cash paid/received. Column % is bucket-based: non-options share is calculated inside non-option total, options share is calculated inside options total. Details.
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Instrument:
Issuer Name Ticker Sector Industry Class History Value ($000) % Shares Shares Δ Shares Δ% Value Δ ($000) Value Δ% Principal Option Type