Six Flags Entertainment Corporation (FUN) insider trading
Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Aug 12, 2026.
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- Filings shown
- 8
- Open-market buys
- 1
- Open-market sells
- 0
- Buys, 10b5-1 box not checked
- 0 of 1
Counts cover the 8 most recent Form 4 filings Tradune holds for FUN (filed Jun 29 – Aug 12, 2026); the score below covers only the trailing 90 days (1 buy, 0 sells). No completed check of FUN's Form 4 list on SEC EDGAR is on record yet; the latest FUN filing Tradune holds was filed Aug 12, 2026. This is not guaranteed to be the complete record — see FUN's full Form 4 filing history on SEC EDGAR.
Open-market activity, last 90 days
Purchases (Form 4 code P) and sales (code S) on the 4 filings Tradune holds for FUN filed Jul 31 – Aug 12, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
| Insider | Buys | Sells | Shares bought | Shares sold | Value |
|---|---|---|---|---|---|
| John T. ReillyPresident & CEO | 1 | 0 | 15,713 | — | +$248,265 |
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →
How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying. “Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).
Insider Buying at FUN
Insiders reported 1 open-market purchase of FUN between Jun 29, 2026 and Aug 12, 2026, across 1 distinct buyer. The most recent purchase was reported by John T. Reilly (President & CEO) on Aug 12, 2026. Grants, option exercises, and tax-withholding transactions are excluded from these counts.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase 10b5-1 box checked | 15,713 | $15.80 | 297,736 | +5.6% | Aug 12, 2026 |
† change in this filer’s own reported holding line (Form 4 Table I, col. 5), not of total company ownership; small prior holdings produce large percentages, so under 100 shares the prior holding is shown instead.
“10b5-1 box checked” = the filer checked the Form 4 box stating that a transaction on the filing was made under a plan intended to satisfy Rule 10b5-1(c); “10b5-1 box not checked” = the box was left blank, which does not prove that no plan exists. The box applies to Form 4s filed from April 1, 2023; older filings, and boxes we could not read, carry no tag. What the 10b5-1 box means.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 66,738 | — | 107,333 | +164% | Jul 29, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 16,017 | — | 115,227 | +16% | Jul 29, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 9,343 | — | 46,697 | +25% | Jul 29, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 40,595 | — | 40,595 | — | Jun 25, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 18,788 | — | 18,788 | — | Jun 25, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 13,032 | — | 42,694 | +44% | Jun 25, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 13,032 | — | 99,210 | +15% | Jun 25, 2026 |
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to FUN's (Aug 12, 2026).
Frequently asked about FUN insider activity
How many insiders bought FUN stock in these Form 4 filings?
1 distinct insider at Six Flags Entertainment Corporation reported 1 open-market purchase (Form 4 code P) of FUN shares between Jun 29, 2026 and Aug 12, 2026, the most recent filed by John T. Reilly (President & CEO) on Aug 12, 2026. Grants, option exercises, and tax-withholding transactions are excluded from these counts.
Who filed the most recent Form 4 for FUN?
The most recent Form 4 on this page was filed by John T. Reilly (President & CEO) on Aug 12, 2026, reporting 1 transaction. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.
What was the largest open-market FUN insider purchase shown?
The largest open-market purchase among the filings shown was 15,713 FUN shares at $15.80 (about $248,265) by John T. Reilly (President & CEO) on Aug 12, 2026. Value is shares × the price reported on the Form 4; that Form 4 has the Rule 10b5-1 box checked.
Do the recent FUN insider purchases have the Form 4 10b5-1 box checked?
Yes. The one FUN open-market purchase among the filings shown has the Rule 10b5-1 box checked on the Form 4: the filer states that a transaction on the filing was made under a plan intended to satisfy Rule 10b5-1(c).
New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.
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Track FUN insider filings free →This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.