SEC Form 4
Six Flags Entertainment Corporation (FUN) insider trading
In the 12 months to Oct 23, 2026, 4 FUN insiders reported open-market purchases of $6.4M across 5 filings; no open-market sales were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $0
- 0 filings · 0 insiders
- Open-market purchases
- $6.4M
- 5 filings
Who traded FUN, and when
- Purchase
FUN daily close from Oct 23, 2025 to Oct 23, 2026, between $6.77 and $26.74, last $6.77. 0 sale and 5 purchase filings by 4 insiders, marked at their filing dates. Rehan Jaffer, Director: bought $5.9M across 1 filing, first filed Jun 16, 2026, last Jun 16, 2026. John T. Reilly, President & CEO: bought $248.3K across 1 filing, first filed Aug 12, 2026, last Aug 12, 2026. Richard M. Haddrill, Executive Chair: bought $190.8K across 1 filing, first filed May 14, 2026, last May 14, 2026. Marilyn G. Spiegel, Director: bought $95.6K across 2 filings, first filed May 14, 2026, last May 26, 2026.
Largest mark · tap a row for others
Rehan Jaffer · Director
Purchase $5,887,675
250,000 shares at $23.55 avg
Filed Jun 16, 2026 · traded Jun 12
Close on filing date $24.45
Rehan Jaffer · Director
Director
$5.9M boughtJohn T. Reilly · President & CEO
President & CEO
$248.3K boughtRichard M. Haddrill · Executive Chair
Executive Chair
$190.8K boughtMarilyn G. Spiegel · Director
Director
$95.6K boughtHas the Six Flags Entertainment Corporation's CEO sold stock?
No. John T. Reilly and Richard Zimmerman (CEOs) made no open-market sales filed as CEO in the last 12 months.
Open-market trades
5 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Rehan Jaffer | Director | — | $5.9M | 1 | — | |
| John T. Reilly | President & CEO | — | $248.3K | 1 | — | |
| Richard M. Haddrill | Executive Chair | — | $190.8K | 1 | — | |
| Marilyn G. Spiegel | Director | — | $95.6K | 2 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | John T. Reilly President & CEO | PurchasePre-arranged (10b5-1) | 15,713 | $15.80 | $248.3K | 297,736 | |
traded | Rehan Jaffer Director | Purchase | 250,000 | $23.55 | $5.9M | 4,900,000 | |
traded | Marilyn G. Spiegel Director | Purchase | 2,500 | $19.10 | $47.8K | 15,161 | |
traded | Marilyn G. Spiegel Director | Purchase | 2,500 | $19.13 | $47.8K | 12,661 | |
traded | Richard M. Haddrill Executive Chair | Purchase | 10,000 | $19.08 | $190.8K | 230,117 |
GET /stocks/filings/vX/form-4?tickers=FUN&filing_date.gte=2025-10-23&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"FUN"
],
"issuer_cik": "0001999001",
"owner_cik": "0001671356",
"accession_number": "0001671356-26-000005",
"form_type": "4",
"filing_date": "2026-08-12",
"period_of_report": "2026-08-12",
"issuer_name": "Six Flags Entertainment Corporation/NEW",
"issuer_trading_symbol": "FUN",
"owner_name": "Reilly John T",
"is_director": true,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "President & CEO",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock, par value $0.01 per share",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-08-12",
"transaction_code": "P",
"equity_swap_involved": false,
"transaction_shares": 15713,
"transaction_price_per_share": 15.8,
"transaction_acquired_disposed": "A",
"shares_owned_following_transaction": 297736,
"transaction_value": 248265.40000000002,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "The purchase reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 12, 2026."
}
]
},
{
"tickers": [
"FUN"
],
"issuer_cik": "0001999001",
"owner_cik": "0001364501",
"accession_number": "0001999001-26-000075",
"form_type": "4",
"filing_date": "2026-06-16",
"period_of_report": "2026-06-12",
"issuer_name": "Six Flags Entertainment Corporation/NEW",
"issuer_trading_symbol": "FUN",
"owner_name": "JAFFER REHAN",
"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, par value $0.01 per share",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-06-12",
"transaction_code": "P",
"equity_swap_involved": false,
"transaction_shares": 125000,
"transaction_price_per_share": 23.6929,
"transaction_acquired_disposed": "A",
"shares_owned_following_transaction": 4775000,
"transaction_value": 2961612.5,
"not_subject_to_section_16": false,
"direct_or_indirect": "I",
"nature_of_ownership": "See Footnote",
"footnotes": [
{
"id": "F1",
"description": "The price reported in column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $23.4500 to $24.0650, inclusive. The reporting person undertakes to provide Issuer, any security holder of Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote."
},
{
"id": "F2",
"description": "Funds owned and managed by H Partners Management, LLC (\"H Management\") directly own the reported securities. As a result, the Reporting Person, as Founder and Managing Member of H Management, may be deemed to have voting and dispositive power with respect to the shares of common stock held by the managed funds. Mr. Jaffer disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that such reporting person is the beneficial owner of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose."
}
]
}
]
}
// 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) · 28 records
- Option exercises2 records
- Tax withholding9 records
- Grants and awards15 records
- Other2 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 FUN 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.