Marsh & McLennan Companies, Inc.
DE ˙ DB ˙ US5717481023
135,70 € ↓ -3,10 (-2,23%)
2026-06-03
DEL PRIS
SecurityDE:MSN / Marsh & McLennan Companies, Inc.
InstitutionMillennium Management Llc
ManagerIsrael Englander
Latest Disclosed Ownership80,034 shares
Latest Disclosed Value $ 13,881,897
Millennium Management Llc ownership in MSN / Marsh & McLennan Companies, Inc.

On May 15, 2026 - Millennium Management Llc filed a 13F-HR form disclosing ownership of 80,034 shares of Marsh & McLennan Companies, Inc. (DE:MSN) valued at $11,977,088 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 724,648 shares of Marsh & McLennan Companies, Inc.. This represents a change in shares of -88.96% during the quarter. The current value of the position is $10,860,614 USD.

Millennium Management Llc has a history of taking positions in derivatives of the underlying security (MSN) 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 15,200 of underlying shares valued at $2,636,440 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.

DE:MSN / Marsh & McLennan Companies, Inc. 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 MARSH & MCLENNAN COS COM 571748102 80,034 -644,614 -88.96 13,882 -89.67 0.0058
2026-02-17 2025-12-31 13F MARSH & MCLENNAN COS COM 571748102 724,648 540,513 293.54 134,437 262.28 0.0565
2025-11-14 2025-09-30 13F MARSH & MCLENNAN COS COM 571748102 184,135 -509,556 -73.46 37,109 -75.53 0.0158
2025-08-14 2025-06-30 13F MARSH & MCLENNAN COS COM 571748102 693,691 275,712 65.96 151,669 48.70 0.0732
2025-05-15 2025-03-31 13F MARSH & MCLENNAN COS COM 571748102 417,979 -358,209 -46.15 101,999 -38.13 0.0543
2025-02-14 2024-12-31 13F MARSH & MCLENNAN COS COM 571748102 776,188 607,481 360.08 164,870 338.06 0.0806
2024-11-14 2024-09-30 13F MARSH & MCLENNAN COS COM 571748102 168,707 -142,494 -45.79 37,637 -42.61 0.0178
2024-08-14 2024-06-30 13F MARSH & MCLENNAN COS COM 571748102 311,201 -127,128 -29.00 65,576 -27.37 0.0304
2024-05-15 2024-03-31 13F MARSH & MCLENNAN COS COM 571748102 438,329 232,098 112.54 90,287 131.07 0.0386
2024-02-14 2023-12-31 13F MARSH & MCLENNAN COS COM 571748102 206,231 -456,566 -68.88 39,075 -69.02 0.0169
2023-11-14 2023-09-30 13F MARSH & MCLENNAN COS COM 571748102 662,797 186,099 39.04 126,130 40.68 0.0637
2023-08-14 2023-06-30 13F MARSH & MCLENNAN COS COM 571748102 476,698 -228,405 -32.39 89,657 -23.65 0.0442
2023-05-15 2023-03-31 13F MARSH & MCLENNAN COS COM 571748102 705,103 683,961 3,235.08 117,435 3,256.24 0.0673
2023-02-14 2022-12-31 13F MARSH & MCLENNAN COS COM 571748102 21,142 18,792 799.66 3,499 896.87 0.0019
2022-11-14 2022-09-30 13F MARSH & MCLENNAN COS COM 571748102 2,350 -102,487 -97.76 351 -97.84 0.0002
2022-08-15 2022-06-30 13F MARSH & MCLENNAN COS COM 571748102 104,837 46,769 80.54 16,276 64.47 0.0101
2022-05-16 2022-03-31 13F MARSH & MCLENNAN COS COM 571748102 58,068 -172,577 -74.82 9,896 -75.32 0.0052
2022-02-14 2021-12-31 13F MARSH & MCLENNAN COS COM 571748102 230,645 -224,353 -49.31 40,091 -41.81 0.0204
2021-11-15 2021-09-30 13F MARSH & MCLENNAN COS COM 571748102 454,998 395,678 667.02 68,900 725.64 0.0413
2021-08-16 2021-06-30 13F MARSH & MCLENNAN COS COM 571748102 59,320 -5,499 -8.48 8,345 5.70 0.0051
2021-05-17 2021-03-31 13F MARSH & MCLENNAN COS COM 571748102 64,819 -101,275 -60.97 7,895 -59.37 0.0056
2021-02-16 2020-12-31 13F MARSH & MCLENNAN COS COM 571748102 166,094 74,903 82.14 19,433 85.78 0.0140
2020-11-16 2020-09-30 13F MARSH & MCLENNAN COS COM 571748102 91,191 52,269 134.29 10,460 150.30 0.0129
2020-08-14 2020-06-30 13F MARSH & MCLENNAN COS COM 571748102 38,922 -141,215 -78.39 4,179 -73.17 0.0057
2020-05-14 2020-03-31 13F MARSH & MCLENNAN COS COM 571748102 180,137 62,943 53.71 15,575 19.28 0.0350
2020-02-14 2019-12-31 13F MARSH & MCLENNAN COS COM 571748102 117,194 -16,745 -12.50 13,057 -2.56 0.0163
2019-11-14 2019-09-30 13F MARSH & MCLENNAN COS COM 571748102 133,939 -139,683 -51.05 13,400 -50.90 0.0212
2019-08-15 2019-06-30 13F/A-1 MARSH & MCLENNAN COS COM 571748102 273,622 243,444 806.69 27,294 863.09 0.0410
2019-08-14 2019-06-30 13F MARSH & MCLENNAN COS COM 571748102 273,622 243,444 27,294
2019-05-14 2019-03-31 13F MARSH & MCLENNAN COS COM 571748102 30,178 1,015 3.48 2,834 21.84 0.0042
2019-02-15 2018-12-31 13F/A-1 MARSH & MCLENNAN COS COM 571748102 29,163 22,677 349.63 2,326 333.15 0.0036
2019-02-14 2018-12-31 13F MARSH & MCLENNAN COS COM 571748102 29,163 2,326
2018-11-14 2018-09-30 13F MARSH & MCLENNAN COS COM 571748102 6,486 -354,652 -98.20 537 -98.19 0.0007
2018-08-14 2018-06-30 13F MARSH & MCLENNAN COS COM 571748102 361,138 64,854 21.89 29,602 20.97 0.0386
2018-05-15 2018-03-31 13F MARSH & MCLENNAN COS COM 571748102 296,284 -25,170 -7.83 24,470 -6.47 0.0327
2018-02-14 2017-12-31 13F MARSH & MCLENNAN COS COM 571748102 321,454 204,949 175.91 26,163 167.95 0.0361
2017-11-14 2017-09-30 13F MARSH & MCLENNAN COS COM 571748102 116,505 -402,832 -77.57 9,764 -75.88 0.0149
2017-08-14 2017-06-30 13F MARSH & MCLENNAN COS COM 571748102 519,337 -740,631 -58.78 40,488 -56.51 0.0722
2017-05-15 2017-03-31 13F MARSH & MCLENNAN COS COM 571748102 1,259,968 -24,155 -1.88 93,099 7.26 0.1706
2017-02-14 2016-12-31 13F MARSH & MCLENNAN COS COM 571748102 1,284,123 1,284,123 0.00 86,794 0.1817
2016-11-14 2016-09-30 13F MARSH & MCLENNAN COS COM 571748102 0 -199,291 -100.00 0 -100.00
2016-08-15 2016-06-30 13F MARSH & MCLENNAN COS COM 571748102 199,291 -8,985 -4.31 13,643 7.76 0.0312
2016-05-16 2016-03-31 13F MARSH & MCLENNAN COS COM 571748102 208,276 -312,835 -60.03 12,661 -56.18 0.0316
2016-02-16 2015-12-31 13F MARSH & MCLENNAN COS COM 571748102 521,111 521,111 0.00 28,896 0.0607
2015-11-16 2015-09-30 13F MARSH & MCLENNAN COS COM 571748102 0 -507,446 -100.00 0 -100.00
2015-08-14 2015-06-30 13F MARSH & MCLENNAN COS COM 571748102 507,446 -369,612 -42.14 28,772 -41.51 0.0544
2015-05-15 2015-03-31 13F MARSH & MCLENNAN COS COM 571748102 877,058 -270,616 -23.58 49,194 -25.12 0.0915
2015-02-17 2014-12-31 13F MARSH & MCLENNAN COS COM 571748102 1,147,674 1,101,511 2,386.13 65,693 2,619.08 0.1392
2014-11-14 2014-09-30 13F MARSH & MCLENNAN COS COM 571748102 46,163 -9,295 -16.76 2,416 -15.94 0.0061
2014-08-14 2014-06-30 13F MARSH & MCLENNAN COS COM 571748102 55,458 -422,655 -88.40 2,874 -87.81 0.0080
2014-05-15 2014-03-31 13F MARSH & MCLENNAN COS COM 571748102 478,113 -65,208 -12.00 23,571 -10.29 0.0683
2014-02-14 2013-12-31 13F MARSH & MCLENNAN COS COM 571748102 543,321 -107,015 -16.46 26,275 -7.23 0.0829
2013-11-14 2013-09-30 13F MARSH & MCLENNAN COS COM 571748102 650,336 -217,924 -25.10 28,322 -18.29 0.0912
2013-08-14 2013-06-30 13F MARSH & MCLENNAN COS COM 571748102 868,260 868,260 34,661 0.1062
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 MARSH & MCLENNAN COS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2026-02-17 2025-12-31 13F MARSH & MCLENNAN COS COM Call 12,900 -54.09 2,393 -57.74 n/a n/a n/a
2025-11-14 2025-09-30 13F MARSH & MCLENNAN COS COM Call 28,100 -64.20 5,663 -67.01 n/a n/a n/a
2025-08-14 2025-06-30 13F MARSH & MCLENNAN COS COM Call 78,500 20.40 17,163 7.88 n/a n/a n/a
2025-05-15 2025-03-31 13F MARSH & MCLENNAN COS COM Call 65,200 649.43 15,911 761.40 n/a n/a n/a
2025-02-14 2024-12-31 13F MARSH & MCLENNAN COS COM Call 8,700 -85.33 1,848 -86.04 n/a n/a n/a
2024-11-14 2024-09-30 13F MARSH & MCLENNAN COS COM Call 59,300 42.89 13,229 51.29 n/a n/a n/a
2024-08-14 2024-06-30 13F MARSH & MCLENNAN COS COM Call 41,500 -71.48 8,745 -70.82 n/a n/a n/a
2024-05-15 2024-03-31 13F MARSH & MCLENNAN COS COM Call 145,500 79.19 29,970 94.81 n/a n/a n/a
2024-02-14 2023-12-31 13F MARSH & MCLENNAN COS COM Call 81,200 -38.16 15,385 -38.43 n/a n/a n/a
2023-11-14 2023-09-30 13F MARSH & MCLENNAN COS COM Call 131,300 15.18 24,986 16.53 n/a n/a n/a
2023-08-14 2023-06-30 13F MARSH & MCLENNAN COS COM Call 114,000 4.97 21,441 18.54 n/a n/a n/a
2023-05-15 2023-03-31 13F MARSH & MCLENNAN COS COM Call 108,600 3,644.83 18,087 3,668.13 n/a n/a n/a
2023-02-14 2022-12-31 13F MARSH & MCLENNAN COS COM Call 2,900 480 n/a n/a n/a
2022-11-14 2022-09-30 13F MARSH & MCLENNAN COS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-08-15 2022-06-30 13F MARSH & MCLENNAN COS COM Call 81,200 12,606 n/a n/a n/a
2022-05-16 2022-03-31 13F MARSH & MCLENNAN COS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-02-14 2021-12-31 13F MARSH & MCLENNAN COS COM Call 15,800 378.79 2,746 449.20 n/a n/a n/a
2021-11-15 2021-09-30 13F MARSH & MCLENNAN COS COM Call 3,300 500 n/a n/a n/a
2021-08-16 2021-06-30 13F MARSH & MCLENNAN COS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-05-17 2021-03-31 13F MARSH & MCLENNAN COS COM Call 8,900 -22.61 1,084 -19.47 n/a n/a n/a
2021-02-16 2020-12-31 13F MARSH & MCLENNAN COS COM Call 11,500 45.57 1,346 48.57 n/a n/a n/a
2020-11-16 2020-09-30 13F MARSH & MCLENNAN COS COM Call 7,900 0.00 906 6.84 n/a n/a n/a
2020-08-14 2020-06-30 13F MARSH & MCLENNAN COS COM Call 7,900 848 n/a n/a n/a
2015-02-17 2014-12-31 13F MARSH & MCLENNAN COS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2014-11-14 2014-09-30 13F MARSH & MCLENNAN COS COM Call 6,600 345 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 MARSH & MCLENNAN COS COM Put 15,200 -23.62 2,636 -28.58 n/a n/a n/a
2026-02-17 2025-12-31 13F MARSH & MCLENNAN COS COM Put 19,900 -24.91 3,692 -30.88 n/a n/a n/a
2025-11-14 2025-09-30 13F MARSH & MCLENNAN COS COM Put 26,500 -32.23 5,341 -37.53 n/a n/a n/a
2025-08-14 2025-06-30 13F MARSH & MCLENNAN COS COM Put 39,100 -10.11 8,549 -19.47 n/a n/a n/a
2025-05-15 2025-03-31 13F MARSH & MCLENNAN COS COM Put 43,500 10,615 n/a n/a n/a
2025-02-14 2024-12-31 13F MARSH & MCLENNAN COS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-11-14 2024-09-30 13F MARSH & MCLENNAN COS COM Put 37,000 132.70 8,254 146.39 n/a n/a n/a
2024-08-14 2024-06-30 13F MARSH & MCLENNAN COS COM Put 15,900 17.78 3,350 20.50 n/a n/a n/a
2024-05-15 2024-03-31 13F MARSH & MCLENNAN COS COM Put 13,500 -34.47 2,781 -28.77 n/a n/a n/a
2024-02-14 2023-12-31 13F MARSH & MCLENNAN COS COM Put 20,600 -49.88 3,903 -50.10 n/a n/a n/a
2023-11-14 2023-09-30 13F MARSH & MCLENNAN COS COM Put 41,100 -39.47 7,821 -38.75 n/a n/a n/a
2023-08-14 2023-06-30 13F MARSH & MCLENNAN COS COM Put 67,900 1,786.11 12,771 2,028.33 n/a n/a n/a
2023-05-15 2023-03-31 13F MARSH & MCLENNAN COS COM Put 3,600 24.14 600 25.00 n/a n/a n/a
2023-02-14 2022-12-31 13F MARSH & MCLENNAN COS COM Put 2,900 -73.64 480 -70.77 n/a n/a n/a
2022-11-14 2022-09-30 13F MARSH & MCLENNAN COS COM Put 11,000 -90.86 1,642 -91.22 n/a n/a n/a
2022-08-15 2022-06-30 13F MARSH & MCLENNAN COS COM Put 120,400 1,223.08 18,692 1,105.16 n/a n/a n/a
2022-05-16 2022-03-31 13F MARSH & MCLENNAN COS COM Put 9,100 -44.17 1,551 -45.25 n/a n/a n/a
2022-02-14 2021-12-31 13F MARSH & MCLENNAN COS COM Put 16,300 101.23 2,833 130.89 n/a n/a n/a
2021-11-15 2021-09-30 13F MARSH & MCLENNAN COS COM Put 8,100 68.75 1,227 81.78 n/a n/a n/a
2021-08-16 2021-06-30 13F MARSH & MCLENNAN COS COM Put 4,800 0.00 675 15.38 n/a n/a n/a
2021-05-17 2021-03-31 13F MARSH & MCLENNAN COS COM Put 4,800 585 n/a n/a n/a
2015-02-17 2014-12-31 13F MARSH & MCLENNAN COS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2014-11-14 2014-09-30 13F MARSH & MCLENNAN COS COM Put 4,400 230 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.