SEC Form 4
Louisiana-Pacific Corp. (LPX) insider trading
In the 12 months to Oct 24, 2026, 2 LPX insiders reported open-market sales of $15.3M across 6 filings; 2 insiders bought $2.0M.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $15.3M
- 6 filings · 2 insiders
- Open-market purchases
- $2.0M
- 2 filings
- Pre-arranged sales (10b5-1)
- 4 of 6
- $15.2M of $15.3M sold (99%)
Who traded LPX, and when
- Purchase
- Sale
- Sale, pre-arranged (10b5-1)
LPX daily close from Oct 24, 2025 to Oct 23, 2026, between $64.55 and $98.57, last $73.76. 6 sale and 2 purchase filings by 4 insiders, marked at their filing dates. William Bradley Southern, Chief Executive Officer: sold $15.2M across 4 filings, first filed Dec 17, 2025, last Feb 18, 2026. F. Nicholas Grasberger III, Director: bought $1.7M across 1 filing, first filed Feb 23, 2026, last Feb 23, 2026. Stephen E. Macadam, Director: bought $249.8K across 1 filing, first filed Nov 12, 2025, last Nov 12, 2025. Lizanne M. Bruce, Director: sold $191.4K across 2 filings, first filed Mar 11, 2026, last Jun 16, 2026.
Largest mark · tap a row for others
William Bradley Southern · Chief Executive Officer
Sale $6,391,645
69,512 shares at $91.95 avg
Filed Jan 16, 2026 · traded Jan 14
Pre-arranged (10b5-1) · close on filing date $93.14
William Bradley Southern · Chief Executive Officer
Chief Executive Officer
$15.2M soldF. Nicholas Grasberger III · Director
Director
$1.7M boughtStephen E. Macadam · Director
Director
$249.8K boughtLizanne M. Bruce · Director
Director
$191.4K soldHas Louisiana-Pacific Corp.'s CEO sold stock?
Yes. William Bradley Southern (CEO) sold 170,008 shares ($15.2M) between Dec 2025 and Feb 2026, all under a pre-arranged 10b5-1 plan. Jason Paul Ringblom (CEO) made no open-market sales filed as CEO in the last 12 months.
Open-market trades
8 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| William Bradley Southern | Chief Executive Officer | $15.2M | — | 4 | 100% of sales | |
| F. Nicholas Grasberger III | Director | — | $1.7M | 1 | — | |
| Stephen E. Macadam | Director | — | $249.8K | 1 | — | |
| Lizanne M. Bruce | Director | $191.4K | — | 2 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Lizanne M. Bruce Director | Sale | 1,141 | $78.21 | $89.2K | 17,895 | |
traded | Lizanne M. Bruce Director | Sale | 1,300 | $78.59 | $102.2K | 17,160 | |
traded | F. Nicholas Grasberger III Director | Purchase | 20,000 | $85.49 | $1.7M | 38,954 | |
traded | William Bradley Southern Chief Executive Officer | SalePre-arranged (10b5-1) | 28,332 | $88.57 | $2.5M | 448,260 | |
traded | William Bradley Southern Chief Executive Officer | SalePre-arranged (10b5-1) | 28,332 | $87.43 | $2.5M | 478,029 | |
traded | William Bradley Southern Chief Executive Officer | SalePre-arranged (10b5-1) | 69,512 | $91.95 | $6.4M | 493,232 | |
traded | William Bradley Southern Chief Executive Officer | SalePre-arranged (10b5-1) | 43,832 | $86.22 | $3.8M | 558,590 | |
traded | Stephen E. Macadam Director | Purchase | 3,200 | $78.06 | $249.8K | 41,149 |
GET /stocks/filings/vX/form-4?tickers=LPX&filing_date.gte=2025-10-24&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"LPX",
"NBN"
],
"issuer_cik": "0000060519",
"owner_cik": "0001379754",
"accession_number": "0001193125-26-272584",
"form_type": "4",
"filing_date": "2026-06-16",
"period_of_report": "2026-06-15",
"issuer_name": "LOUISIANA-PACIFIC CORP",
"issuer_trading_symbol": "LPX",
"owner_name": "Bruce Lizanne M",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-06-15",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 1141,
"transaction_price_per_share": 78.21,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 17895,
"transaction_value": 89237.60999999999,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "Includes 7 shares representing the credit of dividend equivalents on outstanding restricted stock units since the reporting person's last Form 4 filing."
}
]
},
{
"tickers": [
"LPX",
"NBN"
],
"issuer_cik": "0000060519",
"owner_cik": "0001379754",
"accession_number": "0001193125-26-102365",
"form_type": "4",
"filing_date": "2026-03-11",
"period_of_report": "2026-03-10",
"issuer_name": "LOUISIANA-PACIFIC CORP",
"issuer_trading_symbol": "LPX",
"owner_name": "Bruce Lizanne M",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-03-10",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 1300,
"transaction_price_per_share": 78.59,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 17160,
"transaction_value": 102167,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "Includes 9 shares reflecting the credit of dividend equivalents on outstanding restricted stock units since the reporting person's last Form 4 filing."
}
]
}
]
}
// 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) · 50 records
- Tax withholding29 records
- Grants and awards20 records
- Other1 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 LPX 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.
- Pre-arranged (10b5-1)
- The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.