SEC Form 4
SiteOne Landscape Supply, Inc. (SITE) insider trading
In the 12 months to Oct 24, 2026, 3 SITE insiders reported open-market sales of $665.1K across 3 filings; 2 insiders bought $1.5M.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $665.1K
- 3 filings · 3 insiders
- Open-market purchases
- $1.5M
- 3 filings
- Pre-arranged sales (10b5-1)
- 1 of 3
- $128.1K of $665.1K sold (19%)
Who traded SITE, and when
- Purchase
- Sale
- Sale, pre-arranged (10b5-1)
SITE daily close from Oct 24, 2025 to Oct 23, 2026, between $86.36 and $163.25, last $103.16. 3 sale and 3 purchase filings by 5 insiders, marked at their filing dates. Doug Black, CEO: bought $1.3M across 2 filings, first filed Aug 6, 2026, last Aug 28, 2026. Eric J. Elema, EVP, CFO and Assistant Sec.: sold $278.9K across 1 filing, first filed Feb 17, 2026, last Feb 17, 2026. John T. Guthrie, EVP, CFO and Assistant Sec.: sold $258.2K across 1 filing, first filed Dec 1, 2025, last Dec 1, 2025. Daniel T. Laughlin, SVP, Strategy & Development: bought $247.2K across 1 filing, first filed May 8, 2026, last May 8, 2026. Fred M. Diaz, Director: sold $128.1K across 1 filing, first filed May 29, 2026, last May 29, 2026.
Largest mark · tap a row for others
Doug Black · CEO
Purchase $816,280
8,000 shares at $102.04 avg
Filed Aug 6, 2026 · traded Aug 4
Close on filing date $98.52
Doug Black · CEO
CEO
$1.3M boughtEric J. Elema · EVP, CFO and Assistant Sec.
EVP, CFO and Assistant Sec.
$278.9K soldJohn T. Guthrie · EVP, CFO and Assistant Sec.
EVP, CFO and Assistant Sec.
$258.2K soldDaniel T. Laughlin · SVP, Strategy & Development
SVP, Strategy & Development
$247.2K boughtFred M. Diaz · Director
Director
$128.1K soldHas SiteOne Landscape Supply, Inc.'s CEO sold stock?
No. Doug Black (CEO) made no open-market sales filed as CEO in the last 12 months.
Open-market trades
6 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Doug Black | CEO | — | $1.3M | 2 | — | |
| Eric J. Elema | EVP, CFO and Assistant Sec. | $278.9K | — | 1 | — | |
| John T. Guthrie | EVP, CFO and Assistant Sec. | $258.2K | — | 1 | — | |
| Daniel T. Laughlin | SVP, Strategy & Development | — | $247.2K | 1 | — | |
| Fred M. Diaz | Director | $128.1K | — | 1 | 100% of sales |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Doug Black CEO | Purchase | 5,000 | $96.13 | $480.7K | 13,000 | |
traded | Doug Black CEO | Purchase | 8,000 | $102.04 | $816.3K | 4,000 | |
traded | Fred M. Diaz Director | SalePre-arranged (10b5-1) | 1,125 | $113.83 | $128.1K | 11,267 | |
traded | Daniel T. Laughlin SVP, Strategy & Development | Purchase | 2,000 | $123.60 | $247.2K | 2,000 | |
traded | Eric J. Elema EVP, CFO and Assistant Sec. | Sale | 1,765 | $158.01 | $278.9K | 2,911 | |
traded | John T. Guthrie EVP, CFO and Assistant Sec. | Sale | 1,915 | $134.83 | $258.2K | 13,569 |
GET /stocks/filings/vX/form-4?tickers=SITE&filing_date.gte=2025-10-24&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"SITE"
],
"issuer_cik": "0001650729",
"owner_cik": "0001672083",
"accession_number": "0001104659-26-103314",
"form_type": "4",
"filing_date": "2026-08-28",
"period_of_report": "2026-08-26",
"issuer_name": "SiteOne Landscape Supply, Inc.",
"issuer_trading_symbol": "SITE",
"owner_name": "BLACK DOUG",
"is_director": true,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "CEO",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-08-26",
"transaction_code": "P",
"equity_swap_involved": false,
"transaction_shares": 5000,
"transaction_price_per_share": 96.13,
"transaction_acquired_disposed": "A",
"shares_owned_following_transaction": 13000,
"transaction_value": 480650,
"not_subject_to_section_16": false,
"direct_or_indirect": "I",
"nature_of_ownership": "By 2021 Family Trust",
"footnotes": [
{
"id": "F1",
"description": "Reflects indirect ownership by a family trust for which the Reporting Person serves as trustee."
}
]
},
{
"tickers": [
"SITE"
],
"issuer_cik": "0001650729",
"owner_cik": "0001672083",
"accession_number": "0001104659-26-092153",
"form_type": "4",
"filing_date": "2026-08-06",
"period_of_report": "2026-08-04",
"issuer_name": "SiteOne Landscape Supply, Inc.",
"issuer_trading_symbol": "SITE",
"owner_name": "BLACK DOUG",
"is_director": true,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "CEO",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-08-04",
"transaction_code": "P",
"equity_swap_involved": false,
"transaction_shares": 4000,
"transaction_price_per_share": 102.13,
"transaction_acquired_disposed": "A",
"shares_owned_following_transaction": 8000,
"transaction_value": 408520,
"not_subject_to_section_16": false,
"direct_or_indirect": "I",
"nature_of_ownership": "By Family Trust",
"footnotes": [
{
"id": "F1",
"description": "Reflects indirect ownership by a family trust for which the Reporting Person serves as trustee."
}
]
}
]
}
// 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) · 60 records
- Option exercises28 records
- Tax withholding23 records
- Grants and awards4 records
- Gifts5 records
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 SITE 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.