Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionJpmorgan Chase & Co
Latest Disclosed Ownership20,155,017 shares
Ownership 7.80%
Jpmorgan Chase & Co ownership in AJG / Arthur J. Gallagher & Co.

2025-10-31 - Jpmorgan Chase & Co has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 20,155,017 shares of Arthur J. Gallagher & Co. (MX:AJG). This represents 7.8 percent ownership of the company. In their previous filing dated 2025-04-22 , Jpmorgan Chase & Co had reported owning 17,145,622 shares, indicating an increase of 17.55 percent.

Jpmorgan Chase & Co has a history of taking positions in derivatives of the underlying security (AJG) in the form of stock options. The firm currently holds call options representing 6,700 of underlying shares valued at $1,446,865 USD and put options representing 0 of underlying shares valued at $0 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: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date
Effective
Date
Form Prev
Shares
Latest
Shares
ΔShares
(Percent)
Ownership
(Percent)
ΔOwnership
(Percent)
2025-10-31 2025-10-31 13G/A 17,145,622 20,155,017 17.55 7.80 16.42
2025-04-22 2025-04-22 13G/A 12,539,559 17,145,622 36.73 6.70 34.00
2025-02-10 2025-02-10 13G 7,006,583 12,539,559 78.97 5.00 31.58
2017-12-07 2017-12-07 13G/A 13,609,878 7,006,583 -48.52 3.80 -50.00
2017-01-18 2017-01-18 13G/A 11,928,483 13,609,878 14.10 7.60 13.43
2016-01-26 2016-01-26 13G 11,928,483 6.70

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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:AJG / Arthur J. Gallagher & 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)
2026-05-13 2026-03-31 13F/A-1 GALLAGHER ARTHUR J COMMON 363576109 19,568,047 -745,202 -3.67 4,225,720 -19.62 0.0294
2026-02-11 2025-12-31 13F GALLAGHER ARTHUR J COMMON 363576109 20,313,249 -25,284 -0.12 5,256,867 -16.55 0.3300
2025-11-26 2025-09-30 13F/A-1 GALLAGHER ARTHUR J COMMON 363576109 20,338,533 3,330,205 19.58 6,299,674 15.70 0.3774
2025-11-07 2025-09-30 13F GALLAGHER ARTHUR J COMMON 363576109 20,338,533 3,330,205 6,299,674 0.0399
2025-08-12 2025-06-30 13F GALLAGHER ARTHUR J COMMON 363576109 17,008,328 -364,417 -2.10 5,444,724 -9.22 0.3560
2025-05-12 2025-03-31 13F GALLAGHER ARTHUR J COMMON 363576109 17,372,745 4,815,207 38.35 5,997,767 68.27 0.4380
2025-02-12 2024-12-31 13F GALLAGHER ARTHUR J COMMON 363576109 12,557,538 7,712,881 159.20 3,564,458 161.49 0.2654
2024-12-26 2024-09-30 13F/A-1 GALLAGHER ARTHUR J COMMON 363576109 4,844,657 140,502 2.99 1,363,142 11.75 0.1036
2024-11-08 2024-09-30 13F GALLAGHER ARTHUR J COMMON 363576109 4,844,657 140,502 1,363,142 0.1039
2024-12-26 2024-06-30 13F/A-1 GALLAGHER ARTHUR J COMMON 363576109 4,704,155 168,644 3.72 1,219,835 7.56 0.1000
2024-08-12 2024-06-30 13F GALLAGHER ARTHUR J COMMON 363576109 4,704,155 168,644 1,219,835 0.1002
2024-12-26 2024-03-31 13F/A-1 GALLAGHER ARTHUR J COMMON 363576109 4,535,511 -280,952 -5.83 1,134,059 4.70 0.0958
2024-05-10 2024-03-31 13F GALLAGHER ARTHUR J COMMON 363576109 4,535,511 -280,952 1,134,059 0.0959
2024-12-26 2023-12-31 13F/A-1 GALLAGHER ARTHUR J COMMON 363576109 4,816,463 -184,512 -3.69 1,083,126 -4.98 0.1039
2024-02-12 2023-12-31 13F GALLAGHER ARTHUR J COMMON 363576109 4,816,463 -184,512 1,083,126 0.1041
2023-11-14 2023-09-30 13F GALLAGHER ARTHUR J COMMON 363576109 5,000,975 90,842 1.85 1,139,872 5.73 0.1258
2023-08-11 2023-06-30 13F GALLAGHER ARTHUR J COMMON 363576109 4,910,133 185,399 3.92 1,078,118 19.28 0.1172
2023-05-18 2023-03-31 13F/A-1 GALLAGHER ARTHUR J COMMON 363576109 4,724,734 -923,926 -16.36 903,888 84,851.88 0.1101
2023-05-11 2023-03-31 13F GALLAGHER ARTHUR J COMMON 363576109 4,624,904 -1,023,756 903,888 0.0134
2023-02-13 2022-12-31 13F GALLAGHER ARTHUR J COMMON 363576109 5,648,660 -1,173,485 -17.20 1,065 -99.91 0.1404
2022-11-14 2022-09-30 13F GALLAGHER ARTHUR J COMMON 363576109 6,822,145 -1,413,099 -17.16 1,168,089 -13.00 0.1677
2022-08-11 2022-06-30 13F GALLAGHER ARTHUR J COMMON 363576109 8,235,244 -111,088 -1.33 1,342,675 -7.86 0.1870
2022-05-11 2022-03-31 13F GALLAGHER ARTHUR J COMMON 363576109 8,346,332 2,555,055 44.12 1,457,269 48.31 0.1755
2022-02-11 2021-12-31 13F/A-1 GALLAGHER ARTHUR J COMMON 363576109 5,791,277 361,369 6.66 982,606 21.74 0.1135
2022-02-10 2021-12-31 13F GALLAGHER ARTHUR J COMMON 363576109 5,791,277 361,369 982,606 0.1125
2021-11-12 2021-09-30 13F GALLAGHER ARTHUR J COMMON 363576109 5,429,908 302,294 5.90 807,156 12.37 0.0998
2021-08-12 2021-06-30 13F GALLAGHER ARTHUR J COMMON 363576109 5,127,614 759,643 17.39 718,277 31.80 0.0857
2021-05-12 2021-03-31 13F GALLAGHER ARTHUR J COMMON 363576109 4,367,971 -34,933 -0.79 544,993 0.06 0.0727
2021-02-19 2020-12-31 13F/A-1 GALLAGHER ARTHUR J COMMON 363576109 4,402,904 -720,778 -14.07 544,683 1.47 0.0800
2021-02-11 2020-12-31 13F GALLAGHER ARTHUR J COMMON 363576109 4,402,904 -720,778 544,683 13,470.3987
2020-11-12 2020-09-30 13F/A-1 GALLAGHER ARTHUR J COMMON 363576109 5,123,682 -558,825 -9.83 536,808 -3.10 0.0902
2020-11-12 2020-09-30 13F GALLAGHER ARTHUR J COMMON 363576109 5,123,682 536,808
2020-08-11 2020-06-30 13F GALLAGHER ARTHUR J COMMON 363576109 5,682,507 -1,974,340 -25.79 553,988 -11.24 0.1069
2020-05-12 2020-03-31 13F GALLAGHER ARTHUR J COMMON 363576109 7,656,847 -55,941 -0.73 624,110 -15.03 0.1465
2020-02-11 2019-12-31 13F GALLAGHER ARTHUR J COMMON 363576109 7,712,788 433,543 5.96 734,489 12.65 0.1370
2019-11-12 2019-09-30 13F GALLAGHER ARTHUR J COMMON 363576109 7,279,245 -1,153,126 -13.67 652,003 -10.03 0.1298
2019-08-07 2019-06-30 13F GALLAGHER ARTHUR J COMMON 363576109 8,432,371 2,895,732 52.30 724,679 67.59 0.1417
2019-05-07 2019-03-31 13F GALLAGHER ARTHUR J COMMON 363576109 5,536,639 475,061 9.39 432,410 15.92 0.0883
2019-02-11 2018-12-31 13F GALLAGHER ARTHUR J COMMON 363576109 5,061,578 1,378,751 37.44 373,040 36.07 0.0863
2018-11-13 2018-09-30 13F/A-1 GALLAGHER ARTHUR J COMMON 363576109 3,682,827 115,903 3.25 274,149 17.74 0.0525
2018-11-07 2018-09-30 13F GALLAGHER ARTHUR J COMMON 363576109 3,682,827 115,903 274,149
2018-08-14 2018-06-30 13F GALLAGHER ARTHUR J COMMON 363576109 3,566,924 -635,649 -15.13 232,849 -19.39 0.0479
2018-05-10 2018-03-31 13F GALLAGHER ARTHUR J COMMON 363576109 4,202,573 -721,244 -14.65 288,842 -7.30 0.0619
2018-02-13 2017-12-31 13F GALLAGHER ARTHUR J COMMON 363576109 4,923,817 -4,304,703 -46.65 311,579 -45.11 0.0656
2017-11-09 2017-09-30 13F GALLAGHER ARTHUR J COMMON 363576109 9,228,520 -499,559 -5.14 567,646 1.92 0.1252
2017-08-09 2017-06-30 13F GALLAGHER ARTHUR J COMMON 363576109 9,728,079 -3,437,613 -26.11 556,934 -25.18 0.1273
2017-05-10 2017-03-31 13F GALLAGHER ARTHUR J COMMON 363576109 13,165,692 -690,979 -4.99 744,390 3.39 0.1701
2017-02-06 2016-12-31 13F GALLAGHER ARTHUR J COMMON 363576109 13,856,671 1,784,544 14.78 719,990 17.24 0.1730
2016-11-04 2016-09-30 13F GALLAGHER ARTHUR J COMMON 363576109 12,072,127 925,361 8.30 614,107 15.74 0.1511
2016-08-08 2016-06-30 13F GALLAGHER ARTHUR J COMMON 363576109 11,146,766 -270,262 -2.37 530,586 4.48 0.1323
2016-05-10 2016-03-31 13F GALLAGHER ARTHUR J COMMON 363576109 11,417,028 -534,042 -4.47 507,832 3.79 0.1300
2016-02-12 2015-12-31 13F GALLAGHER ARTHUR J COMMON 363576109 11,951,070 6,061,954 102.93 489,277 101.26 0.1228
2015-11-13 2015-09-30 13F GALLAGHER ARTHUR J COMMON 363576109 5,889,116 2,716,316 85.61 243,103 61.99 0.0650
2015-08-14 2015-06-30 13F ARTHUR J GALLAGHER COMMON 363576109 3,172,800 190,123 6.37 150,073 7.63 0.0354
2015-05-15 2015-03-31 13F ARTHUR J GALLAGHER COMMON 363576109 2,982,677 312,889 11.72 139,439 10.93 0.0318
2015-02-13 2014-12-31 13F ARTHUR J GALLAGHER COMMON 363576109 2,669,788 -636,487 -19.25 125,695 -16.19 0.0287
2014-12-08 2014-09-30 13F/A-1 ARTHUR J GALLAGHER COMMON 363576109 3,306,275 282,826 9.35 149,973 6.44 0.0355
2014-11-14 2014-09-30 13F ARTHUR J GALLAGHER COMMON 363576109 3,306,275 149,973
2014-09-03 2014-06-30 13F/A-1 ARTHUR J GALLAGHER COMMON 363576109 3,023,449 -494,104 -14.05 140,894 -15.82 0.0358
2014-08-14 2014-06-30 13F ARTHUR J GALLAGHER COMMON 363576109 3,023,449 140,894
2014-05-15 2014-03-31 13F GALLAGHER ARTHUR J COMMON 363576109 3,517,553 -266,320 -7.04 167,366 -5.75 0.0462
2014-02-26 2013-12-31 13F/A-1 GALLAGHER ARTHUR J COMMON 363576109 3,783,873 -39,795 -1.04 177,576 6.39 0.0504
2014-02-13 2013-12-31 13F GALLAGHER ARTHUR J COMMON 363576109 3,783,873 177,576
2013-10-31 2013-09-30 13F GALLAGHER ARTHUR J COMMON 363576109 3,823,668 319,397 9.11 166,905 9.01 0.0495
2013-08-13 2013-06-30 13F GALLAGHER ARTHUR J COMMON 363576109 3,504,271 3,504,271 153,103 0.0488
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
(%)
2026-05-13 2026-03-31 13F/A GALLAGHER ARTHUR J OPTION Call 6,700 1,447 n/a n/a n/a
2025-05-12 2025-03-31 13F GALLAGHER ARTHUR J OPTION Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-02-12 2024-12-31 13F GALLAGHER ARTHUR J OPTION Call 200 57 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
(%)
2025-02-12 2024-12-31 13F GALLAGHER ARTHUR J OPTION Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-12-26 2024-09-30 13F/A GALLAGHER ARTHUR J OPTION Put 105,800 103.46 29,769 120.77 n/a n/a n/a
2024-11-08 2024-09-30 13F GALLAGHER ARTHUR J OPTION Put 105,800 29,769 n/a n/a n/a
2024-12-26 2024-06-30 13F/A GALLAGHER ARTHUR J OPTION Put 52,000 316.00 13,484 331.49 n/a n/a n/a
2024-08-12 2024-06-30 13F GALLAGHER ARTHUR J OPTION Put 52,000 13,484 n/a n/a n/a
2024-12-26 2024-03-31 13F/A GALLAGHER ARTHUR J OPTION Put 12,500 3,126 n/a n/a n/a
2024-05-10 2024-03-31 13F GALLAGHER ARTHUR J OPTION Put 12,500 3,126 n/a n/a n/a
2016-11-04 2016-09-30 13F GALLAGHER ARTHUR J OPTION Put 0 -100.00 0 -100.00 n/a n/a n/a
2016-08-08 2016-06-30 13F GALLAGHER ARTHUR J OPTION Put 200 0.00 10 11.11 n/a n/a n/a
2016-05-10 2016-03-31 13F GALLAGHER ARTHUR J OPTION Put 200 9 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.