SEC Form 4
Diodes Inc (DIOD) insider trading
In the 12 months to Oct 24, 2026, 8 DIOD insiders reported open-market sales of $16.8M across 24 filings; no open-market purchases were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $16.8M
- 24 filings · 8 insiders
- Open-market purchases
- $0
- 0 filings
Who traded DIOD, and when
- Sale
DIOD daily close from Oct 24, 2025 to Oct 23, 2026, between $42.36 and $122.76, last $81.07. 24 sale and 0 purchase filings by 8 insiders, marked at their filing dates. Keh Shew Lu, Director: sold $7.8M across 2 filings, first filed Nov 13, 2025, last Feb 24, 2026. Francis Tang, Chief Technology Officer: sold $3.1M across 3 filings, first filed May 13, 2026, last Jun 1, 2026. Brett R. Whitmire, CFO: sold $2.2M across 3 filings, first filed Feb 4, 2026, last May 13, 2026. Emily Yang, SVP Worldwide Sales/Marketing: sold $1.2M across 6 filings, first filed Feb 4, 2026, last May 27, 2026. Gary Yu, President and CEO: sold $716.3K across 3 filings, first filed Feb 4, 2026, last May 27, 2026. Jin Zhao, President, Diodes Asia: sold $707.8K across 3 filings, first filed Feb 4, 2026, last May 27, 2026. 2 others: sold $1.0M across 4 filings, first filed Feb 17, 2026, last Jun 1, 2026.
Largest mark · tap a row for others
Keh Shew Lu · Director
Sale $7,521,102
111,000 shares at $67.76 avg
Filed Feb 24, 2026 · traded Feb 20
Close on filing date $69.29
Keh Shew Lu · Director
Director
$7.8M soldFrancis Tang · Chief Technology Officer
Chief Technology Officer
$3.1M soldBrett R. Whitmire · CFO
CFO
$2.2M soldEmily Yang · SVP Worldwide Sales/Marketing
SVP Worldwide Sales/Marketing
$1.2M soldGary Yu · President and CEO
President and CEO
$716.3K soldJin Zhao · President, Diodes Asia
President, Diodes Asia
$707.8K sold2 others
Combined, one mark per week
$1.0M soldHas Diodes Inc's CEO sold stock?
Yes. Gary Yu (CEO) sold 8,532 shares ($716.3K) between Feb 2026 and May 2026.
Open-market trades
24 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Keh Shew Lu | Director | $7.8M | — | 2 | — | |
| Francis Tang | Chief Technology Officer | $3.1M | — | 3 | — | |
| Brett R. Whitmire | CFO | $2.2M | — | 3 | — | |
| Emily Yang | SVP Worldwide Sales/Marketing | $1.2M | — | 6 | — | |
| Gary Yu | President and CEO | $716.3K | — | 3 | — | |
| Jin Zhao | President, Diodes Asia | $707.8K | — | 3 | — | |
| Andy Tsong | SVP Worldwide Products Group | $691.8K | — | 3 | — | |
| Richard Dallas White | Corporate Secretary | $318.5K | — | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Francis Tang Chief Technology Officer | Sale | 15,330 | $112.04 | $1.7M | 71,438 | |
traded | Richard Dallas White Corporate Secretary | Sale | 3,000 | $106.17 | $318.5K | 8,071 | |
traded | Francis Tang Chief Technology Officer | Sale | 9,137 | $109.14 | $997.2K | 86,768 | |
traded | Emily Yang SVP Worldwide Sales/Marketing | Sale | 5,000 | $109.06 | $545.3K | 61,878 | |
traded | Jin Zhao President, Diodes Asia | Sale | 3,689 | $106.86 | $394.2K | 43,531 | |
traded | Gary Yu President and CEO | Sale | 3,632 | $110.08 | $399.8K | 108,147 | |
traded | Andy Tsong SVP Worldwide Products Group | Sale | 1,582 | $106.96 | $169.2K | 48,170 | |
traded | Emily Yang SVP Worldwide Sales/Marketing | Sale | 2,000 | $96.81 | $193.6K | 66,878 | |
traded | Emily Yang SVP Worldwide Sales/Marketing | Sale | 2,000 | $101.47 | $202.9K | 68,878 | |
traded | Francis Tang Chief Technology Officer | Sale | 3,643 | $108.00 | $393.4K | 95,905 | |
traded | Brett R. Whitmire CFO | Sale | 16,556 | $103.34 | $1.7M | 44,632 | |
traded | Jin Zhao President, Diodes Asia | Sale | 2,760 | $102.36 | $282.5K | 47,220 | |
traded | Andy Tsong SVP Worldwide Products Group | Sale | 2,652 | $110.00 | $291.7K | 49,752 | |
traded | Gary Yu President and CEO | Sale | 2,000 | $70.00 | $140.0K | 109,671 | |
traded | Emily Yang SVP Worldwide Sales/Marketing | Sale | 2,154 | $69.89 | $150.6K | 70,878 | |
traded | Keh Shew Lu Director | Sale | 111,000 | $67.76 | $7.5M | Multiple accounts | |
traded | Andy Tsong SVP Worldwide Products Group | Sale | 3,277 | $70.46 | $230.9K | 52,404 | |
traded | Emily Yang SVP Worldwide Sales/Marketing | Sale | 1,000 | $71.89 | $71.9K | 73,032 | |
traded | Brett R. Whitmire CFO | Sale | 5,953 | $71.22 | $424.0K | 61,188 | |
traded | Brett R. Whitmire CFO | Sale | 830 | $60.85 | $50.5K | 67,141 | |
traded | Emily Yang SVP Worldwide Sales/Marketing | Sale | 950 | $60.85 | $57.8K | 74,032 | |
traded | Gary Yu President and CEO | Sale | 2,900 | $60.85 | $176.5K | 111,671 | |
traded | Jin Zhao President, Diodes Asia | Sale | 525 | $59.19 | $31.1K | 49,980 | |
traded | Keh Shew Lu Director | Sale | 6,000 | $47.42 | $284.5K | Multiple accounts |
GET /stocks/filings/vX/form-4?tickers=DIOD&filing_date.gte=2025-10-24&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"DIOD"
],
"issuer_cik": "0000029002",
"owner_cik": "0001368889",
"accession_number": "0001368889-26-000002",
"form_type": "4",
"filing_date": "2026-06-01",
"period_of_report": "2026-05-29",
"issuer_name": "DIODES INC /DEL/",
"issuer_trading_symbol": "DIOD",
"owner_name": "White Richard Dallas",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "Corporate Secretary",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Diodes Incorporated Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-05-29",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 1000,
"transaction_price_per_share": 104.48,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 10071,
"transaction_value": 104480,
"direct_or_indirect": "D"
},
{
"tickers": [
"DIOD"
],
"issuer_cik": "0000029002",
"owner_cik": "0001368889",
"accession_number": "0001368889-26-000002",
"form_type": "4",
"filing_date": "2026-06-01",
"period_of_report": "2026-05-29",
"issuer_name": "DIODES INC /DEL/",
"issuer_trading_symbol": "DIOD",
"owner_name": "White Richard Dallas",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "Corporate Secretary",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Diodes Incorporated Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-05-29",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 2000,
"transaction_price_per_share": 107.0101,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 8071,
"transaction_value": 214020.19999999998,
"direct_or_indirect": "D"
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 29 records
- Tax withholding9 records
- Grants and awards19 records
- Gifts1 record
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
Build this yourself
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for DIOD every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.