Six Flags Entertainment Corporation
US ˙ NYSE

SecurityFUN / Six Flags Entertainment Corporation
InstitutionGAMMA Investing LLC
Latest Disclosed Ownership7,757 shares
Latest Disclosed Value $ 137,687
GAMMA Investing LLC reports 30.30% increase in ownership of FUN / Six Flags Entertainment Corporation

On April 6, 2026 - GAMMA Investing LLC filed a 13F-HR form disclosing ownership of 7,757 shares of Six Flags Entertainment Corporation (US:FUN) valued at $137,687 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 5, 2026 disclosing 5,953 shares of Six Flags Entertainment Corporation. This represents a change in shares of 30.30% during the quarter. The current value of the position is $157,390 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-06 2026-03-31 13F SIX FLAGS ENTERTAINMENT CORP COM Common Stock 83001C108 7,757 1,804 30.30 138 50.55 0.0064
2026-01-05 2025-12-31 13F SIX FLAGS ENTERTAINMENT CORP COM Common Stock 83001C108 5,953 5,331 857.07 91 550.00 0.0046
2025-10-02 2025-09-30 13F SIX FLAGS ENTERTAINMENT CORP COM Common Stock 83001C108 622 -1,178 -65.44 14 -74.07 0.0008
2025-07-14 2025-06-30 13F SIX FLAGS ENTERTAINMENT CORP COM Common Stock 83001C108 1,800 884 96.51 55 68.75 0.0035
2025-04-15 2025-03-31 13F/A-1 SIX FLAGS ENTERTAINMENT CORP COM Common Stock 83001C108 916 34 3.85 33 -23.81 0.0025
2025-04-07 2025-03-31 13F SIX FLAGS ENTERTAINMENT CORP COM Common Stock 83001C108 32,674 31,792 1 0.0049
2025-01-03 2024-12-31 13F SIX FLAGS ENTERTAINMENT CORP COM Common Stock 83001C108 882 192 27.83 43 55.56 0.0036
2024-10-04 2024-09-30 13F SIX FLAGS ENTERTAINMENT CORP COM Common Stock 83001C108 690 690 28 0.0028
2024-10-07 2024-09-30 13F SIX FLAGS ENTERTAINMENT CORP COM Common Stock 83001C108 690 690 28 0.0028
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.