EFOI Energy Focus, Inc. - Common Stock

NASDAQ · Electrical Equipment · View on SEC EDGAR ↗
$2.99
Price · Aug 19, 2026
Fundamentals as of Aug 11, 2026

EFOI Stock Snapshot Price, market cap, P/E, EPS, ROE, debt/equity, 52-week range

Price
$2.99
Market Cap
$19M
P/E (TTM)
-16.6
EPS (TTM)
$-0.18
Revenue (TTM)
$4M
Div Yield
ROE
-29.7%
Debt/Equity
52W Range
$2 – $10

EFOI Stock Price Chart Daily OHLCV with technical indicators — pan, zoom, and customize your view

10-Year Performance Revenue, net income, margins and EPS trends

Revenue & Net Income $4M
10-point trend, -88.5%
2016-12-31 2025-12-31
EPS $-0.18
4-point trend, +87.6%
2016-12-31 2025-12-31
Free Cash Flow $-1M
9-point trend, +92.0%
2016-12-31 2025-12-31
Margins -28.8%
9-point trend, -23.8%
2016-12-31 2025-12-31

Valuation P/E, P/S, P/B, EV/EBITDA ratios — is the stock expensive or cheap?

Metric
5Y trend
EFOI
Peer Median
P/E (TTM)
5-point trend, +24.4%
-16.6
P/S (TTM)
5-point trend, -78.8%
5.3
0.8
P/B
5-point trend, -88.4%
4.6
2.1
Price / FCF
5-point trend, +46.4%
-12.9

Profitability Gross, operating and net margins; ROE, ROA, ROIC

Metric
5Y trend
EFOI
Peer Median
Gross Margin
5-point trend, +9.7%
18.9%
23.1%
Operating Margin
5-point trend, +67.4%
-28.8%
Net Profit Margin
5-point trend, +63.9%
-28.8%
-19.9%
ROA
5-point trend, +67.5%
-19.2%
-41.6%
ROE
5-point trend, +79.8%
-29.7%
-51.5%
ROIC
5-point trend, +77.3%
-24.9%

Financial Health Debt, liquidity, solvency — balance sheet strength

Metric
5Y trend
EFOI
Peer Median
Current Ratio
5-point trend, +206.4%
5.0
1.2
Quick Ratio
5-point trend, +258.6%
1.7

Growth Revenue, EPS and net income growth: YoY, 3Y CAGR, 5Y CAGR

Metric
5Y trend
EFOI
Peer Median
Revenue YoY
5-point trend, -63.9%
-26.8%
Revenue CAGR 3Y
5-point trend, -63.9%
-15.8%
Revenue CAGR 5Y
5-point trend, -63.9%
-26.7%

Per Share Metrics EPS, book value per share, cash flow per share, dividend per share

Metric
5Y trend
EFOI
Peer Median
EPS (Diluted)
4-point trend, +87.6%
$-0.18

Capital Efficiency Asset turnover, inventory turnover, receivables turnover

Metric
5Y trend
EFOI
Peer Median

EFOI Analyst Consensus Bullish and bearish analyst opinions, 12-month price target, upside

BUY 7 analysts
  • Strong Buy 2 28.6%
  • Buy 4 57.1%
  • Hold 1 14.3%
  • Sell 0 0.0%
  • Strong Sell 0 0.0%

Earnings History EPS actual vs estimate, surprise %, beat rate, next earnings date

Avg Surprise
-0.87%
Period EPS Actual EPS Est Surprise
Dec. 31, 2024 $-0.05
March 31, 2024 $-0.13
June 30, 2022 $-2.45 $-1.43 -1.0%
March 31, 2022 $-3.08 $-2.36 -0.72%

Peer comparison (GICS sub-industry) Key metrics vs sector peers

Ticker Market Cap P/E Rev YoY Net Margin ROE Gross Margin
EFOI $15M -12.8 -26.8% -28.8% -29.7% 18.9%
GWH $42M -0.4 -74.9% -4007.6% -1064.2% -1748.1%
SMXT -6.3 295.8%
DFLI
FLUX -3.8 9.2%
SUNE $4M -0.2 26.5% -15.2% -46.9% 38.3%

Full Fundamentals All metrics by year — income statement, balance sheet, cash flow

Income Statement 18
Annual Income Statement data for EFOI
Metric Trend 202520242023202220212020201920182017201620152014
Revenue 12-point trend, -84.3% $4M $5M $6M $6M $10M $17M $13M $18M $20M $31M $64M $23M
Cost of Revenue 12-point trend, -80.6% $3M $4M $5M $6M $8M $12M $11M $15M $15M $23M $35M $15M
Gross Profit 12-point trend, -91.4% $672.0K $699.0K $223.0K $-318.0K $2M $5M $2M $3M $5M $8M $29M $8M
R&D Expense 12-point trend, -60.0% $412.0K $524.0K $587.0K $1M $2M $1M $1M $3M $3M $4M $3M $1M
SG&A Expense 12-point trend, -83.6% $1M $2M $4M $7M $9M $8M $7M $10M $11M $20M $17M $8M
Operating Expenses 12-point trend, -80.9% $2M $3M $4M $9M $10M $9M $9M $12M $16M $25M $20M $9M
Operating Income 12-point trend, +6.1% $-1M $-2M $-4M $-9M $-9M $-4M $-7M $-9M $-11M $-17M $10M $-1M
Interest Expense 10-point trend, -85.9% · · $380.0K $954.0K $792.0K $481.0K $317.0K $8.0K $2.0K $0 $85.0K $3M
Interest Income 3-point trend, -96.5% $2.0K $0 $57.0K · · · · · · · · ·
Other Non-op 8-point trend, +86.1% · · · · $-65.0K $-73.0K $-91.0K $-7.0K $-99.0K $-18.0K $53.0K $-466.0K
Pretax Income 12-point trend, +75.8% $-1M $-2M $-4M $-10M $-8M $-6M $-7M $-9M $-11M $-17M $10M $-4M
Income Tax 12-point trend, +0.00 $0 $0 $3.0K $4.0K $-1.0K $-5.0K $10.0K $11.0K $-100.0K $27.0K $149.0K $0
Net Income 12-point trend, +82.9% $-1M $-2M $-4M $-10M $-8M $-6M $-7M $-9M $-11M $-17M $9M $-6M
EPS (Basic) 6-point trend, +76.0% $-0.18 $-0.32 · · · · · · $-0.95 $-1.45 $0.84 $-0.75
EPS (Diluted) 6-point trend, +76.0% $-0.18 $-0.32 · · · · · · $-0.95 $-1.45 $0.82 $-0.75
Shares (Basic) 12-point trend, -29.0% 5,553,000 4,947,000 3,241,000 1,158,000 4,561,000 3,270,000 2,462,000 11,997,000 11,806,000 11,673,000 10,413,000 7,816,000
Shares (Diluted) 11-point trend, -29.0% 5,553,000 4,947,000 3,241,000 1,158,000 4,561,000 3,270,000 · 11,997,000 11,806,000 11,673,000 10,752,000 7,816,000
EBITDA 9-point trend, +93.9% $-1M $-2M $-4M $-9M $-9M $-4M $-7M · $-11M $-17M · ·
Balance Sheet 27
Annual Balance Sheet data for EFOI
Metric Trend 202520242023202220212020201920182017201620152014
Cash & Equivalents 12-point trend, -85.7% $1M $565.0K $2M $52.0K $3M $2M $350.0K $6M $11M $17M $35M $7M
Receivables 11-point trend, -80.2% $526.0K $804.0K · $445.0K $1M $2M $2M $2M $4M $6M $10M $3M
Inventory 12-point trend, -57.3% $3M $3M $4M $5M $8M $6M $6M $8M $6M $9M $8M $7M
Prepaid Expense 12-point trend, -86.0% $126.0K $157.0K $156.0K $232.0K $479.0K $782.0K $353.0K $1M $596.0K $882.0K $740.0K $899.0K
Other Current Assets 5-point trend, -100.0% · $0 $2.0K $0 $3.0K $1.0K · · · · · ·
Current Assets 12-point trend, -75.4% $5M $5M $9M $7M $13M $11M $9M $18M $21M $33M $53M $19M
PP&E (Net) 7-point trend, -7.9% · · · · · $420.0K $389.0K $610.0K $1M $2M $2M $456.0K
PP&E (Gross) 7-point trend, -1.5% · · · · · $3M $3M $3M $3M $5M $5M $3M
Accum. Depreciation 7-point trend, -0.4% · · · · · $3M $3M $3M $2M $2M $3M $3M
Intangibles · · · · · · $817.0K · · · · ·
Other Non-current Assets 7-point trend, -100.0% · · · · · $0 $405.0K $194.0K $159.0K $33.0K $51.0K $38.0K
Total Assets 12-point trend, -73.8% $5M $6M $10M $8M $14M $12M $12M $18M $22M $35M $56M $19M
Accounts Payable 9-point trend, -69.0% · · · $2M $2M $2M $1M $4M $2M $3M $7M $7M
Accrued Liabilities 9-point trend, -90.6% · $90.0K $110.0K · · $1M $1M $1M $992.0K $2M $3M $962.0K
Short-term Debt 7-point trend, -100.0% $0 $0 $450.0K $0 $2M $0 $885.0K · · · · ·
Current Liabilities 12-point trend, -90.4% $922.0K $2M $6M $8M $8M $8M $7M $7M $3M $5M $10M $10M
Capital Leases 7-point trend, -91.4% $78.0K $254.0K $798.0K $1M $26.0K $318.0K $906.0K · · · · ·
Other Non-current Liabilities 7-point trend, -100.0% · · · · · $0 $14.0K $200.0K $232.0K $107.0K $77.0K $46.0K
Total Liabilities 12-point trend, -89.7% $1M $3M $7M $9M $8M $8M $8M $7M $3M $5M $10M $10M
Long-term Debt 2-point trend, -100.0% · · · · · · · · · · $0 $70.0K
Total Debt 4-point trend, -100.0% · $0 $450.0K $3M $2M · · · · · · ·
Common Stock 12-point trend, +0.0% $1.0K $1.0K $0 $1.0K $0 $0 $0 $1.0K $1.0K $1.0K $1.0K $1.0K
Retained Earnings 12-point trend, -75.5% $-156M $-155M $-153M $-149M $-139M $-131M $-125M $-117M $-108M $-97M $-80M $-89M
AOCI 12-point trend, -100.6% $-3.0K $-3.0K $-3.0K $-3.0K $-3.0K $-3.0K $-3.0K $-1.0K $2.0K $-1.0K $0 $469.0K
Stockholders' Equity 12-point trend, -58.0% $4M $3M $3M $-477.0K $6M $4M $4M $11M $19M $30M $45M $10M
Liabilities + Equity 12-point trend, -73.8% $5M $6M $10M $8M $14M $12M $12M $18M $22M $35M $56M $19M
Shares Outstanding 12-point trend, -33.1% 6,306,433 5,260,741 4,348,690 1,406,920 910,000 3,525,000 2,485,684 12,090,695 11,868,896 11,710,549 11,648,978 9,423,975
Cash Flow 15
Annual Cash Flow data for EFOI
Metric Trend 202520242023202220212020201920182017201620152014
Stock-based Comp 12-point trend, -77.3% $121.0K $4.0K $44.0K $117.0K $429.0K $131.0K $616.0K $908.0K $807.0K $1M $813.0K $532.0K
Deferred Tax 6-point trend, +0.00 $0 $0 · · · · · $0 $-125.0K $0 $0 ·
Amort. of Intangibles Flat — no change across 2 periods · · · · · · · · · · $0 $0
Restructuring 4-point trend, +100000.00 · · · · · · · $100.0K $2M · $0 $0
Operating Cash Flow 12-point trend, -758.9% $-1M $-1M $-2M $-7M $-10M $-2M $-7M $-7M $-6M $-17M $4M $-163.0K
CapEx 12-point trend, -72.2% $54.0K $19.0K $69.0K $41.0K $443.0K $223.0K $132.0K $57.0K $162.0K $2M $2M $194.0K
Investing Cash Flow 10-point trend, -62.8% $-197.0K $-19.0K $-69.0K $-16.0K $-443.0K $-223.0K $-129.0K $189.0K $-65.0K · · $-121.0K
Stock Issued 6-point trend, -64.7% $2M $851.0K · · · · · · $0 $0 $24M $6M
Stock Repurchased 3-point trend, +309000.00 · · · · · · · · · $309.0K $0 $0
Net Stock Activity 3-point trend, +779.6% $2M · · · · · · · $0 $-309.0K · ·
Financing Cash Flow 12-point trend, -66.3% $2M $-149.0K $4M $4M $11M $4M $1M $2M $81.0K $146.0K $26M $6M
Net Change in Cash 12-point trend, -91.0% $499.0K $-1M $2M $-3M $504.0K $1M $-6M $-4M $-6M $-18M $27M $6M
Taxes Paid 2-point trend, -40.0% $3.0K $5.0K · · · · · · · · · ·
Free Cash Flow 9-point trend, +92.0% $-1M $-1M $-3M $-7M $-10M $-3M $-7M · $-6M $-18M · ·
Levered FCF 7-point trend, +84.1% · · $-3M $-8M $-11M $-3M $-7M · $-6M $-18M · ·
Profitability 8
Annual Profitability data for EFOI
Metric Trend 202520242023202220212020201920182017201620152014
Gross Margin 9-point trend, -23.8% 18.9% 14.4% 3.9% -5.3% 17.2% 30.8% 15.5% · 24.3% 24.8% · ·
Operating Margin 9-point trend, +47.0% -28.8% -37.9% -69.5% -155.8% -88.3% -24.2% -54.7% · -56.8% -54.3% · ·
Net Margin 9-point trend, +47.0% -28.8% -32.6% -75.1% -172.2% -79.9% -35.5% -58.2% · -56.8% -54.5% · ·
Pretax Margin 9-point trend, +46.9% -28.8% -32.5% -75.0% -172.2% -80.0% -35.6% -58.0% · -57.4% -54.4% · ·
EBITDA Margin 9-point trend, +47.0% -28.8% -37.9% -69.5% -155.8% -88.3% -24.2% -54.7% · -56.8% -54.3% · ·
ROA 9-point trend, +48.6% -19.2% -20.0% -45.9% -89.8% -58.9% -49.6% -49.0% · -39.4% -37.2% · ·
ROE 9-point trend, +33.9% -29.7% -51.7% -123.7% -1016.2% -147.2% -187.1% -160.2% · -45.8% -44.9% · ·
ROIC 9-point trend, +55.7% -24.9% -63.3% -113.5% -434.3% -109.8% -95.6% -174.3% · -57.9% -56.3% · ·
Liquidity & Solvency 4
Annual Liquidity & Solvency data for EFOI
Metric Trend 202520242023202220212020201920182017201620152014
Current Ratio 9-point trend, -23.7% 5.0 2.1 1.4 0.9 1.6 1.5 1.4 · 8.0 6.6 · ·
Quick Ratio 9-point trend, -61.8% 1.7 0.2 0.3 0.1 0.5 0.5 0.4 · 5.5 4.5 · ·
Debt / Equity 4-point trend, -100.0% · 0.0 0.1 -5.5 0.3 · · · · · · ·
Interest Coverage 6-point trend, +99.8% · · -10.4 -9.7 -11.0 -8.5 -21.9 · -5640.5 · · ·
Efficiency 3
Annual Efficiency data for EFOI
Metric Trend 202520242023202220212020201920182017201620152014
Asset Turnover 9-point trend, -2.9% 0.7 0.6 0.6 0.5 0.7 1.4 0.8 · 0.7 0.7 · ·
Inventory Turnover 9-point trend, -65.6% 0.9 1.1 1.1 0.9 1.2 2.0 1.5 · 2.0 2.7 · ·
Receivables Turnover 7-point trend, +36.0% 5.4 · · 6.7 6.1 7.7 5.6 · 4.3 3.9 · ·
Per Share 5
Annual Per Share data for EFOI
Metric Trend 202520242023202220212020201920182017201620152014
Book Value / Share 9-point trend, -74.5% $0.65 $0.55 $0.70 $-0.05 $0.97 $1.21 $0.32 · $1.63 $2.56 · ·
Revenue / Share 7-point trend, -75.9% $0.64 $0.98 $1.76 $0.74 $2.16 · · · $1.68 $2.66 · ·
Cash Flow / Share 7-point trend, +82.2% $-0.25 $-0.26 $-0.75 $-0.83 $-2.14 · · · $-0.50 $-1.42 · ·
Cash / Share 9-point trend, -88.1% $0.17 $0.11 $0.47 $0.01 $0.42 $0.52 $0.03 · $0.91 $1.42 · ·
EPS (TTM) 12-point trend, +76.0% $-0.18 $-0.32 $-1.31 $-1.31 $-1.76 $-1.88 $-1.07 $-1.07 $-0.95 $-1.45 $0.82 $-0.75
Growth Rates 3
Annual Growth Rates data for EFOI
Metric Trend 202520242023202220212020201920182017201620152014
Revenue YoY 5-point trend, +35.4% -26.8% -15.0% -4.2% -39.5% -41.4% · · · · · · ·
Revenue CAGR 3Y 3-point trend, +47.7% -15.8% -21.0% -30.2% · · · · · · · · ·
Revenue CAGR 5Y -26.7% · · · · · · · · · · ·
Valuation (TTM) 14
Annual Valuation (TTM) data for EFOI
Metric Trend 202520242023202220212020201920182017201620152014
Revenue TTM 12-point trend, -84.3% $4M $5M $6M $6M $10M $17M $13M $18M $20M $31M $64M $23M
Net Income TTM 12-point trend, +82.4% $-1M $-2M $-4M $-10M $-8M $-6M $-7M $-9M $-11M $-17M $9M $-6M
Market Cap 9-point trend, -99.2% $15M $6M $7M $22M $190M $99M $204M · $1.02B $1.74B · ·
Enterprise Value 4-point trend, -97.0% · $6M $5M $25M $189M · · · · · · ·
P/E 12-point trend, +94.4% -12.8 -3.7 -1.2 -1.7 -17.0 -15.0 -15.4 -20.3 -90.3 -102.6 586.9 -230.1
P/S 9-point trend, -92.7% 4.1 1.3 1.1 3.7 19.3 5.9 16.1 · 51.3 56.2 · ·
P/B 9-point trend, -93.9% 3.5 2.1 2.2 -46.2 30.7 23.4 51.2 · 52.8 58.2 · ·
P / Tangible Book 5-point trend, -84.8% 3.5 2.1 2.2 · 30.7 23.4 · · · · · ·
P / Cash Flow 9-point trend, +90.1% -10.4 -4.8 -2.7 -3.3 -19.5 -40.6 -30.9 · -173.3 -105.2 · ·
P / FCF 9-point trend, +89.6% -10.0 -4.8 -2.6 -3.3 -18.6 -37.2 -30.3 · -168.6 -95.8 · ·
EV / EBITDA 4-point trend, +85.8% · -3.1 -1.3 -2.6 -21.8 · · · · · · ·
EV / FCF 4-point trend, +76.7% · -4.3 -2.0 -3.6 -18.6 · · · · · · ·
EV / Revenue 4-point trend, -93.9% · 1.2 0.9 4.1 19.2 · · · · · · ·
Earnings Yield 12-point trend, -1711.6% -7.8% -26.9% -86.8% -58.5% -5.9% -6.7% -6.5% -4.9% -1.1% -0.97% 0.17% -0.43%

Financial Statements Income statement, balance sheet, cash flow — annual, last 5 years

Income Statement
2025-12-312024-12-312023-12-312022-12-312021-12-31
Revenue $4M$5M$6M$6M$10M
Gross Margin % 18.9%14.4%3.9%-5.3%17.2%
Operating Margin % -28.8%-37.9%-69.5%-155.8%-88.3%
Net Income $-1M$-2M$-4M$-10M$-8M
Diluted EPS $-0.18$-0.32
Balance Sheet
2025-12-312024-12-312023-12-312022-12-312021-12-31
Debt / Equity 0.00.1-5.50.3
Current Ratio 5.02.11.40.91.6
Quick Ratio 1.70.20.30.10.5
Cash Flow
2025-12-312024-12-312023-12-312022-12-312021-12-31
Free Cash Flow $-1M$-1M$-3M$-7M$-10M

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Institutional owners (13F) 18 filers · $616K total · As of June 30, 2026

Institutions that report holding this stock in their quarterly SEC Form 13F. Long positions only; a single filer may appear twice for separate option legs. Large offsetting put/call legs typically reflect market-making or hedged inventory, not directional conviction.

Institutional activity — Q2 2026 vs prior quarter
New positions Exited positions Increased Decreased Net shares change
5 (+2 vs prior Q) 2 (0 vs prior Q) 5 (+3 vs prior Q) 1 (-2 vs prior Q) +49K

Compared to Q1 2026. SEC Form 13F filings are due within 45 days of quarter-end plus a short buffer for late filers — quarters still inside that window are skipped in favor of the most recent fully-reported pair.

Institution Value Shares % of tracked 13F Type
VANGUARD CAPITAL MANAGEMENT LLC $142,996 43,332 23.21% Shares
RENAISSANCE TECHNOLOGIES LLC $110,213 33,398 17.89% Shares
VANGUARD GROUP INC $100,097 43,332 16.25% Shares
GEODE CAPITAL MANAGEMENT, LLC $71,722 21,734 11.64% Shares
VANGUARD FIDUCIARY TRUST CO $65,159 19,745 10.58% Shares
STATE STREET CORP $45,593 13,816 7.40% Shares
CITADEL ADVISORS LLC $41,927 12,705 6.81% Shares
BlackRock, Inc. $10,877 3,296 1.77% Shares
Tower Research Capital LLC (TRC) $9,359 2,836 1.52% Shares
MORGAN STANLEY $8,128 2,463 1.32% Shares
UBS Group AG $7,201 2,182 1.17% Shares
ROYAL BANK OF CANADA $1,000 175 0.16% Shares
FMR LLC $946 287 0.15% Shares
CIBC Private Wealth Group LLC $656 236 0.11% Shares
BankPlus Trust Department $149 45 0.02% Shares
Federation des caisses Desjardins du Quebec $26 8 0.00% Shares
COUNTRY TRUST BANK $13 4 0.00% Shares
Motiv8 Investments LLC $0 28 0.00% Shares

Company insiders 53 insiders · 16 officers · 29 directors

Insider Role Last activity Shares owned Buys 12m Sells 12m Net 12m
Lesley A. Matt Chief Executive Officer April 28, 2023 A 0 0 $0
Ted L Tewksbury III Chairman, CEO & President Feb. 27, 2019 M 95,934 0 0 $0
James Tu Executive Chairman & CEO March 14, 2016 A 0 0 $0
Joseph G. Kaveski Chief Executive Officer April 1, 2011 J 67,697 0 0 $0
Jerry Turin CFO and Secretary Dec. 31, 2018 A 6,906 0 0 $0
Michael Harry Port CFO & Secretary April 3, 2018 M 15,793 0 0 $0
Bradley Brian White CFO & Secretary March 10, 2017 P 1,075 0 0 $0
Marcia Jean Miller Chief Financial Officer March 14, 2016 A 8,377 0 0 $0
Mark J Plush Chief Financial Officer and VP Aug. 11, 2011 P 0 0 $0
Nicholas G Berchtold Former Chief Financial Officer April 1, 2011 J 39,153 0 0 $0
Eric Hilliard President & COO March 14, 2016 A 10,665 0 0 $0
John Davenport President April 1, 2011 J 223,725 0 0 $0
James Raymond Warren III SVP, GC & Corp. Secretary April 28, 2023 A 0 0 $0
Roger Buelow Chief Technology Officer Aug. 5, 2011 A 39,153 0 0 $0
Barry R Greenwald Senior VP Pool & Spa Division May 25, 2007 M 6,693 0 0 $0
Steven J Keplinger Sr. V.P. Operations March 11, 2004 M 5,729 0 0 $0
Gina Huang Director March 30, 2023 A 3,720,242 0 0 $0
Chiao Chieh Huang Director March 28, 2023 A 2,659,017 0 0 $0
Geraldine Mcmanus Director Dec. 17, 2019 M 20,000 0 0 $0
Jennifer Y Cheng Director Dec. 17, 2019 M 20,000 0 0 $0
Philip Politziner Director Nov. 12, 2019 A 20,000 0 0 $0
Michael Rush Ramelot Director June 19, 2019 M 47,927 0 0 $0
Robert A. Farkas Director April 1, 2019 A 0 0 $0
William Cohen Director June 20, 2018 M 663,622 0 0 $0
Glenda Dorchak Director June 20, 2018 A 32,427 0 0 $0
Marc Eisenberg Director June 20, 2018 A 32,427 0 0 $0
Ronald D Black Director June 20, 2018 A 32,427 0 0 $0
Satish Rishi Director June 20, 2018 A 3,169 0 0 $0
Jiangang Luo Director June 15, 2017 M 16,486 0 0 $0
Simon Cheng Director March 16, 2016 A 0 0 $0
David Anthony Director Sept. 30, 2010 A 0 0 $0
Michael A Kasper Director Sept. 30, 2010 A 0 0 $0
Paul Von Paumgartten Director Sept. 30, 2010 A 0 0 $0
Louis R Schneeberger Director Sept. 30, 2010 A 0 0 $0
James J Finnerty Director July 23, 2010 A 53,385 0 0 $0
Laurence V Goddard Director June 24, 2009 A 0 0 $0
Philip Wolfson Director June 24, 2009 A 2,002 0 0 $0
David N Ruckert Director June 24, 2009 A 253,073 0 0 $0
Ronald A Casentini Director March 14, 2008 P 7,250 0 0 $0
John B Stuppin Director March 14, 2008 P 158,275 0 0 $0
Theodore L Eliot JR Director Aug. 23, 2004 M 5,000 0 0 $0
ADVANCED LIGHTING TECHNOLOGIES INC 10% owner March 23, 2004 J 140,068 0 0 $0
TRIGRAN INVESTMENTS LP 10% owner March 9, 2004 S 597,183 0 0 $0
Kaj Den Daas Sept. 4, 2022 A 0 0 $0
Stephen Socolof June 22, 2022 M 25,500 0 0 $0
Tod A Nestor Feb. 11, 2022 A 45,432 0 0 $0
DIKER MANAGEMENT LLC Feb. 22, 2010 S 1,907,108 0 0 $0
Enfants Edward W Des Dec. 5, 2006 A 0 0 $0
Jeffrey H Brite July 7, 2006 A 10,000 0 0 $0
Robert A Connors July 7, 2006 A 5,000 0 0 $0

Insiders from SEC Form 3/4/5 filings; net = open-market P/S only

Activists & 5%+ owners 26 positions

Investors who filed SEC Schedule 13D — beneficial ownership above 5% with an intent to influence the issuer (activist stakes, board campaigns, M&A). Each row shows the most recent known state of that filer's position.

Filer Filed Stake Status Purpose Filing
Huang Chiao Chieh, SANDER ELECTRONIC CO., LTD. Dec. 31, 2025 31.90% Initial filing SEC
Gina Huang, Jag International, Ltd., Brilliant Start Enterprise, Inc., Jiangang Luo, Cleantech Global Ltd., James Tu, Fusion Park LLC, 5 Elements Global Fund L.P., Yeh-Mei Hui Cheng, Communal International, Ltd., 5 Elements Energy Efficiency Limited ×4 filings Jan. 30, 2020 Initial filing Passive investment SEC
Costar Partners II, LLC, William Cohen ×2 filings Jan. 4, 2018 Initial filing SEC
Cleantech Global Ltd. (formerly Prime Science & Technology, Inc.), Jiangang Luo Oct. 7, 2015 Initial filing SEC
Cleantech Global Limited (formerly Prime Science & Technology Inc.), Jiangang Luo Oct. 14, 2014 Initial filing SEC
Scott DeSano ×2 filings Oct. 14, 2014 Initial filing SEC
Prime Science & Technology, Inc., Jiangang Luo April 24, 2014 Initial filing Passive investment SEC
Brilliant Start Enterprise, Inc., Jag International, Ltd., Gina Huang April 22, 2014 Initial filing Passive investment SEC
James Tu, 5 Elements Global Fund L.P. April 17, 2014 Initial filing Passive investment SEC
Scott E. DeSano ×2 filings Aug. 5, 2013 Initial filing SEC
Scott E. DeSano (2) April 5, 2012 Initial filing SEC
S.S. or I.R.S. Identificaiton No. of Above Person David Gelbaum, Trustee, The Quercus Trust, S.S. or I.R.S. Identificaiton No. of Above Person Monica Chavez Gelbaum, Trustee, The Quercus Trust, S.S. or I.R.S. Identificaiton No. of Above Person The Quercus Trust ×6 filings July 8, 2011 Initial filing SEC
Undisclosed reporting person, Undisclosed reporting person March 4, 2010 Initial filing SEC
Undisclosed reporting person, Undisclosed reporting person Feb. 23, 2010 Initial filing SEC
David Gelbaum, Trustee, The Quercus Trust (2), Monica Chavez Gelbaum, Trustee, The Quercus Trust (2), The Quercus Trust (2) ×4 filings Jan. 21, 2010 Initial filing SEC

Purpose is an automated classification of the filer's own stated purpose (SEC Item 4) — not investment advice. "—" means no clear purpose was stated or the text could not be classified.

ETF ownership Held by 2 ETFs

Weight reflects direct equity holdings (N-PORT) only; leveraged or derivative-based funds may hold additional swap exposure not shown.

Fund Weight Units As of Source
DCOR · Dimensional ETF Trust 0.00% 3,205 NS April 30, 2026 N-PORT
VXF · VANGUARD INDEX FUNDS July 15, 2026 Daily