Shannon River Fund Management LLC

Q3 2026 13F-HR Holdings

Location
New York, NY
Holdings as of
9/30/2026
Date filed
11/13/2026
Form type
13F-HR
Num holdings
27
Total value ($000)
$644,686
Net value change ($000)
-475,708 (-42.5%)
New positions
7
Sold out positions
17
Turnover %
72.2%
Sector allocation + QoQ delta (equities-only)
Prev filing: 8/13/2026 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)
OSIS 25,971 NEW
MRVL 24,154 NEW
DT 18,911 NEW
ALAB 16,898 NEW
RELY 16,004 NEW
GLBE 12,821 104.5%
VSH 10,735 NEW
CIFR 8,782 53.7%
APPN 6,460 NEW
CLS 3,633 7.1%
Top Reduces (Value $000, Stocks/ETFs)
EXTR -46,098 -100.0%
AMD -44,563 -72.5%
QUANTINUUM INC -38,365 -100.0%
UTI -38,070 -100.0%
TSEM -37,629 -37.7%
ABNB -35,465 -100.0%
KLIC -34,500 -77.0%
OUST -28,088 -100.0%
COHR -27,364 -53.7%
RMBS -26,198 -67.7%
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