OBERWEIS ASSET MANAGEMENT INC/

Q1 2026 13F-HR Holdings

Location
Lisle, IL
Holdings as of
3/31/2026
Date filed
5/15/2026
Form type
13F-HR
Num holdings
180
Total value ($000)
$3,385,665
Net value change ($000)
+650,786 (23.8%)
New positions
22
Sold out positions
21
Turnover %
12.3%
Sector allocation + QoQ delta (equities-only)
Prev filing: 2/17/2026 Next filing: — SEC filing

Snapshot: Change Analysis

Compared to Q4 2025
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)
AAOI 127,682 179.6%
LITE 83,542 80.7%
DOCN 42,084 112.3%
DAN 35,302 186.5%
FSLY 24,102 343.2%
UCTT 23,905 150.2%
NVMI 22,709 61.0%
DRS 20,012 NEW
INDV 19,916 NEW
CHYM 19,395 NEW
Top Reduces (Value $000, Stocks/ETFs)
AMBA -28,574 -65.3%
FRSH -24,703 -98.2%
CARG -19,881 -100.0%
SXT -17,663 -100.0%
GENI -17,477 -100.0%
ACIW -15,811 -100.0%
INDV -15,247 -100.0%
CVLT -13,902 -100.0%
TPB -11,219 -100.0%
WK -10,997 -100.0%
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