Sphere Entertainment Co.
MX ˙ BMV
SecurityMX:SPHR / Sphere Entertainment Co.
InstitutionMillennium Management Llc
ManagerIsrael Englander
Latest Disclosed Ownership41,531 shares
Latest Disclosed Value $ 4,875,739
Millennium Management Llc ownership in SPHR / Sphere Entertainment Co.

On May 15, 2026 - Millennium Management Llc filed a 13F-HR form disclosing ownership of 41,531 shares of Sphere Entertainment Co. (MX:SPHR) valued at $4,875,739 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 460,553 shares of Sphere Entertainment Co.. This represents a change in shares of -90.98% during the quarter.

Millennium Management Llc has a history of taking positions in derivatives of the underlying security (SPHR) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 79,900 of underlying shares valued at $9,380,260 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:SPHR / Sphere Entertainment Co. Historical Put/Call Ratio
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)
2026-05-15 2026-03-31 13F SPHERE ENTERTAINMENT CL A 55826T102 41,531 -419,022 -90.98 4,876 -88.87 0.0020
2026-02-17 2025-12-31 13F SPHERE ENTERTAINMENT CL A 55826T102 460,553 325,805 241.79 43,789 423.17 0.0184
2025-11-14 2025-09-30 13F SPHERE ENTERTAINMENT CL A 55826T102 134,748 -246,559 -64.66 8,371 -47.48 0.0036
2025-08-14 2025-06-30 13F SPHERE ENTERTAINMENT CL A 55826T102 381,307 361,727 1,847.43 15,939 2,390.31 0.0077
2025-05-15 2025-03-31 13F SPHERE ENTERTAINMENT CL A 55826T102 19,580 -44,939 -69.65 641 -75.39 0.0003
2025-02-14 2024-12-31 13F SPHERE ENTERTAINMENT CL A 55826T102 64,519 -260,555 -80.15 2,601 -81.89 0.0013
2024-11-14 2024-09-30 13F SPHERE ENTERTAINMENT CL A 55826T102 325,074 -10,164 -3.03 14,362 22.19 0.0068
2024-08-14 2024-06-30 13F SPHERE ENTERTAINMENT CL A 55826T102 335,238 261,857 356.85 11,753 226.38 0.0054
2024-05-15 2024-03-31 13F SPHERE ENTERTAINMENT CL A 55826T102 73,381 -145,282 -66.44 3,602 -51.50 0.0015
2024-02-14 2023-12-31 13F SPHERE ENTERTAINMENT CL A 55826T102 218,663 194,109 790.54 7,426 714.14 0.0032
2023-11-14 2023-09-30 13F SPHERE ENTERTAINMENT CL A 55826T102 24,554 24,554 912 0.0005
2023-08-14 2023-06-30 13F MADISON SQUARE GRDN ENTERTNM CL A 55826T102 0 -8,824 -100.00 0 -100.00
2023-05-15 2023-03-31 13F MADISON SQUARE GRDN ENTERTNM CL A 55826T102 8,824 3,553 67.41 521 119.83 0.0003
2023-02-14 2022-12-31 13F MADISON SQUARE GRDN ENTERTNM CL A 55826T102 5,271 -446 -7.80 237 -5.95 0.0001
2022-11-14 2022-09-30 13F MADISON SQUARE GRDN ENTERTNM CL A 55826T102 5,717 -24,491 -81.07 252 -84.15 0.0001
2022-08-15 2022-06-30 13F MADISON SQUARE GRDN ENTERTNM CL A 55826T102 30,208 30,208 1,590 0.0010
2022-02-14 2021-12-31 13F MADISON SQUARE GRDN ENTERTNM CL A 55826T102 0 -74,295 -100.00 0 -100.00
2021-11-15 2021-09-30 13F MADISON SQUARE GRDN ENTERTNM CL A 55826T102 74,295 25,163 51.22 5,399 30.85 0.0032
2021-08-16 2021-06-30 13F MADISON SQUARE GRDN ENTERTNM CL A 55826T102 49,132 -48,109 -49.47 4,126 -48.13 0.0025
2021-05-17 2021-03-31 13F MADISON SQUARE GRDN ENTERTNM CL A 55826T102 97,241 82,283 550.09 7,954 406.30 0.0057
2021-02-16 2020-12-31 13F MADISON SQUARE GRDN ENTERTNM CL A 55826T102 14,958 3,097 26.11 1,571 93.47 0.0011
2020-11-16 2020-09-30 13F MADISON SQUARE GRDN ENTERTNM CL A 55826T102 11,861 -69,649 -85.45 812 -86.72 0.0010
2020-08-14 2020-06-30 13F MADISON SQUARE GRDN ENTERTNM CL A 55826T102 81,510 81,510 6,113 0.0084
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F SPHERE ENTERTAINMENT CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2026-02-17 2025-12-31 13F SPHERE ENTERTAINMENT CL A Call 13,000 1,236 n/a n/a n/a
2025-08-14 2025-06-30 13F SPHERE ENTERTAINMENT CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-05-15 2025-03-31 13F SPHERE ENTERTAINMENT CL A Call 104,000 602.70 3,403 470.81 n/a n/a n/a
2025-02-14 2024-12-31 13F SPHERE ENTERTAINMENT CL A Call 14,800 -36.21 597 -41.80 n/a n/a n/a
2024-11-14 2024-09-30 13F SPHERE ENTERTAINMENT CL A Call 23,200 1,025 n/a n/a n/a
2024-08-14 2024-06-30 13F SPHERE ENTERTAINMENT CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-15 2024-03-31 13F SPHERE ENTERTAINMENT CL A Call 50,000 0.00 2,454 44.52 n/a n/a n/a
2024-02-14 2023-12-31 13F SPHERE ENTERTAINMENT CL A Call 50,000 1,698 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F SPHERE ENTERTAINMENT CL A Put 79,900 2,002.63 9,380 2,498.34 n/a n/a n/a
2026-02-17 2025-12-31 13F SPHERE ENTERTAINMENT CL A Put 3,800 361 n/a n/a n/a
2025-05-15 2025-03-31 13F SPHERE ENTERTAINMENT CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-02-14 2024-12-31 13F SPHERE ENTERTAINMENT CL A Put 23,900 -45.56 964 -50.34 n/a n/a n/a
2024-11-14 2024-09-30 13F SPHERE ENTERTAINMENT CL A Put 43,900 1,940 n/a n/a n/a
2024-08-14 2024-06-30 13F SPHERE ENTERTAINMENT CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-15 2024-03-31 13F SPHERE ENTERTAINMENT CL A Put 50,000 0.00 2,454 44.52 n/a n/a n/a
2024-02-14 2023-12-31 13F SPHERE ENTERTAINMENT CL A Put 50,000 1,698 n/a n/a n/a
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.