SEC Form 4
Hydrofarm Holdings Group, Inc. (HYFM) insider trading
In the 12 months to Oct 31, 2026, one HYFM insider reported open-market sales of $5.6K across 1 filing; one president bought $20.0K.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $5.6K
- 1 filing · 1 insider
- Open-market purchases
- $20.0K
- 1 filing · Mark S. Parker, President
Who traded HYFM, and when
- Purchase
- Sale
HYFM daily close from Oct 31, 2025 to Oct 30, 2026, between $0.54 and $2.47, last $0.70. 1 sale and 1 purchase filings by 2 insiders, marked at their filing dates. Mark S. Parker, President: bought $20.0K across 1 filing, first filed Oct 29, 2026, last Oct 29, 2026. Melisa Denis, Director: sold $5.6K across 1 filing, first filed Dec 8, 2025, last Dec 8, 2025.
Largest mark · tap a row for others
Mark S. Parker · President
Purchase $20,000
22,099 shares at $0.91 avg
Filed Oct 29, 2026 · traded Oct 27
Close on filing date $0.78
Mark S. Parker · President
President
$20.0K boughtMelisa Denis · Director
Director
$5.6K soldOpen-market trades
2 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Mark S. Parker | President | — | $20.0K | 1 | — | |
| Melisa Denis | Director | $5.6K | — | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Mark S. Parker President | Purchase | 22,099 | $0.91 | $20.0K | 40,657 | |
traded | Melisa Denis Director | Sale | 2,995 | $1.88 | $5.6K | 58,423 |
GET /stocks/filings/vX/form-4?tickers=HYFM&filing_date.gte=2025-10-31&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"HYFM"
],
"issuer_cik": "0001695295",
"owner_cik": "0001915363",
"accession_number": "0001437749-26-034002",
"form_type": "4",
"filing_date": "2026-10-29",
"period_of_report": "2026-10-27",
"issuer_name": "HYDROFARM HOLDINGS GROUP, INC.",
"issuer_trading_symbol": "HYFM",
"owner_name": "PARKER MARK S",
"is_officer": true,
"officer_title": "President",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock, $0.0001 par value per share",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-10-27",
"transaction_code": "P",
"equity_swap_involved": false,
"transaction_shares": 22099,
"transaction_price_per_share": 0.905,
"transaction_acquired_disposed": "A",
"shares_owned_following_transaction": 40657,
"transaction_value": 19999.595,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "On October 27, 2026, Issuer entered into a Securities Purchase Agreement (the \"Purchase Agreement\") with the purchasers signatory thereto and consummated the transactions contemplated thereunder. Pursuant to the Purchase Agreement, Issuer agreed to issue and sell to Reporting Person (i) in a registered direct offering 3,837 shares of Common Stock, $0.0001 par value per share (\"Common Stock\") and (ii) in a concurrent private placement 18,262 shares of Common Stock and 22,099 accompanying common stock purchase warrants to purchase shares of Common Stock (the \"Common Warrants\")."
}
]
},
{
"tickers": [
"HYFM"
],
"issuer_cik": "0001695295",
"owner_cik": "0001834132",
"accession_number": "0001834132-25-000003",
"form_type": "4",
"filing_date": "2025-12-08",
"period_of_report": "2025-12-04",
"issuer_name": "HYDROFARM HOLDINGS GROUP, INC.",
"issuer_trading_symbol": "HYFM",
"owner_name": "Denis Melisa",
"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, $0.0001 par value per share",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2025-12-04",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 2875,
"transaction_price_per_share": 1.8806,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 58543,
"transaction_value": 5406.725,
"not_subject_to_section_16": false,
"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) · 13 records
- Tax withholding5 records
- Tax withholding (sold to cover)1 record
- Grants and awards7 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
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.
Frequently asked questions
Has Hydrofarm Holdings Group, Inc.'s CEO sold stock?
No. William Douglas Toler (CEO) made no open-market sales filed as CEO in the last 12 months.
How current is HYFM’s insider data?
These are HYFM Form 4 filings from the last year, refreshed daily. The Massive Form 4 API has the full, continuously updated record.
What counts as an open-market buy or sell?
Only purchases and sales at the market price. Option exercises, grants, gifts, and shares withheld for taxes are reported on Form 4 but are left out of the buy and sell totals.
Build with AI
Track HYFM insider trades with your agent
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 HYFM 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.
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