Genuine Parts Company
MX ˙ BMV ˙ US3724601055
SecurityMX:GPC / Genuine Parts Company
InstitutionMassmutual Trust Co Fsb/adv
Latest Disclosed Ownership27,999 shares
Latest Disclosed Value $ 2,960,894
Massmutual Trust Co Fsb/adv reports 9.09% decrease in ownership of GPC / Genuine Parts Company

On April 13, 2026 - Massmutual Trust Co Fsb/adv filed a 13F-HR form disclosing ownership of 27,999 shares of Genuine Parts Company (MX:GPC) valued at $2,960,894 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 7, 2026 disclosing 30,798 shares of Genuine Parts Company. This represents a change in shares of -9.09% during the quarter.

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)
2026-04-13 2026-03-31 13F Genuine Parts Common / Ordinary Stock 372460105 27,999 -2,799 -9.09 2,961 -21.82 0.0806
2026-01-07 2025-12-31 13F Genuine Parts Common / Ordinary Stock 372460105 30,798 -1,876 -5.74 3,787 -16.39 0.0975
2025-10-22 2025-09-30 13F Genuine Parts Common / Ordinary Stock 372460105 32,674 -1,669 -4.86 4,529 8.69 0.1153
2025-07-09 2025-06-30 13F Genuine Parts Common / Ordinary Stock 372460105 34,343 -948 -2.69 4,166 -0.90 0.1110
2025-04-01 2025-03-31 13F Genuine Parts Common / Ordinary Stock 372460105 35,291 -1,654 -4.48 4,205 -2.53 0.1216
2025-01-16 2024-12-31 13F Genuine Parts Common / Ordinary Stock 372460105 36,945 -3,268 -8.13 4,314 -23.20 0.1210
2024-10-02 2024-09-30 13F Genuine Parts Common / Ordinary Stock 372460105 40,213 -1,535 -3.68 5,617 -2.74 0.1600
2024-07-02 2024-06-30 13F Genuine Parts Common / Ordinary Stock 372460105 41,748 -422 -1.00 5,775 -11.62 0.1752
2024-04-09 2024-03-31 13F Genuine Parts Common / Ordinary Stock 372460105 42,170 -1,683 -3.84 6,533 7.57 0.2033
2024-01-03 2023-12-31 13F Genuine Parts Common / Ordinary Stock 372460105 43,853 -988 -2.20 6,074 -6.19 0.2038
2023-10-04 2023-09-30 13F Genuine Parts Common / Ordinary Stock 372460105 44,841 -872 -1.91 6,474 -16.31 0.2391
2023-08-02 2023-06-30 13F Genuine Parts Common / Ordinary Stock 372460105 45,713 -737 -1.59 7,736 -0.45 0.2782
2023-04-11 2023-03-31 13F Genuine Parts Common / Ordinary Stock 372460105 46,450 680 1.49 7,772 110,914.29 0.2970
2023-01-06 2022-12-31 13F Genuine Parts Common / Ordinary Stock 372460105 45,770 409 0.90 8 16.67 0.3267
2022-10-07 2022-09-30 13F Genuine Parts Common / Ordinary Stock 372460105 45,361 -793 -1.72 7 0.00 0.3074
2022-07-07 2022-06-30 13F Genuine Parts Common / Ordinary Stock 372460105 46,154 -484 -1.04 6 20.00 0.2658
2022-04-08 2022-03-31 13F Genuine Parts Common / Ordinary Stock 372460105 46,638 600 1.30 6 -16.67 0.2222
2022-02-09 2021-12-31 13F Genuine Parts Common / Ordinary Stock 372460105 46,038 72 0.16 6 20.00 0.2397
2021-11-12 2021-09-30 13F Genuine Parts Common / Ordinary Stock 372460105 45,966 640 1.41 6 0.00 0.2304
2021-08-16 2021-06-30 13F Genuine Parts Common / Ordinary Stock 372460105 45,326 1,356 3.08 6 0.00 0.2435
2021-05-17 2021-03-31 13F Genuine Parts Common / Ordinary Stock 372460105 43,970 1,470 3.46 5 25.00 0.2390
2021-02-16 2020-12-31 13F Genuine Parts Common / Ordinary Stock 372460105 42,500 -2,363 -5.27 4 0.00 0.2185
2020-11-13 2020-09-30 13F Genuine Parts Common / Ordinary Stock 372460105 44,863 -911 -1.99 4 -99.90 0.2496
2020-08-13 2020-06-30 13F Genuine Parts Common / Ordinary Stock 372460105 45,774 -169 -0.37 3,981 28.71 0.2566
2020-05-15 2020-03-31 13F Genuine Parts Common / Ordinary Stock 372460105 45,943 150 0.33 3,093 -36.42 0.2469
2020-05-15 2019-12-31 13F Genuine Parts Common / Ordinary Stock 372460105 45,793 741 1.64 4,865 8.42 0.3005
2019-11-14 2019-09-30 13F Genuine Parts Common / Ordinary Stock 372460105 45,052 331 0.74 4,487 -3.13 0.3005
2019-08-14 2019-06-30 13F Genuine Parts Common / Ordinary Stock 372460105 44,721 2,816 6.72 4,632 -1.32 0.3203
2019-05-15 2019-03-31 13F Genuine Parts Common / Ordinary Stock 372460105 41,905 3,520 9.17 4,695 27.38 0.3385
2019-02-26 2018-12-31 13F Genuine Parts Common / Ordinary Stock 372460105 38,385 924 2.47 3,686 -1.02 0.3154
2018-11-09 2018-09-30 13F Genuine Parts Common / Ordinary Stock 372460105 37,461 978 2.68 3,724 11.20 0.2763
2018-08-20 2018-06-30 13F Genuine Parts Common / Ordinary Stock 372460105 36,483 648 1.81 3,349 4.01 0.2673
2018-05-21 2018-03-31 13F Genuine Parts Common / Ordinary Stock 372460105 35,835 1,346 3.90 3,219 -1.74 0.2664
2018-03-01 2017-12-31 13F/A-1 Genuine Parts Common / Ordinary Stock 372460105 34,489 1,039 3.11 3,277 2.41 0.2715
2018-02-21 2017-12-31 13F iShares U.S. Medical Devices ETF Exchange Traded Fund 372460105 71 -33,379 12
2018-02-13 2017-09-30 13F Genuine Parts common 372460105 33,450 3,074 10.12 3,199 13.56 0.2651
2017-08-14 2017-06-30 13F Genuine Parts common 372460105 30,376 1,106 3.78 2,818 4.18 0.2509
2017-05-02 2017-03-31 13F Genuine Parts common 372460105 29,270 5,385 22.55 2,705 18.54 0.2540
2017-02-13 2016-12-31 13F Genuine Parts common 372460105 23,885 8,491 55.16 2,282 46.41 0.2791
2016-08-10 2016-06-30 13F GENUINE PARTS common 372460105 15,394 2,000 14.93 1,559 17.14 0.1970
2016-05-10 2016-03-31 13F GENUINE PARTS common 372460105 13,394 121 0.91 1,331 16.67 0.1795
2016-02-12 2015-12-31 13F GENUINE PARTS common 372460105 13,273 5,259 65.62 1,140 62.39 0.1630
2015-11-04 2015-09-30 13F GENUINE PARTS common 372460105 8,014 2,189 37.58 703 37.38 0.1483
2015-07-29 2015-06-30 13F GENUINE PARTS common 372460105 5,825 -5,849 -50.10 511 -52.99 0.1142
2015-05-11 2015-03-31 13F GENUINE PARTS common 372460105 11,674 2,455 26.63 1,088 10.69 0.1793
2015-02-05 2014-12-31 13F GENUINE PARTS common 372460105 9,219 1,205 15.04 982 39.89 0.3176
2014-11-04 2014-09-30 13F GENUINE PARTS COMMON STOCK 372460105 8,014 2,189 37.58 703 37.38 0.1397
2014-07-09 2014-06-30 13F GENUINE PARTS COMMON STOCK 372460105 5,825 2,340 67.14 511 69.21 0.2021
2014-05-15 2014-03-31 13F GENUINE PARTS common 372460105 3,485 765 28.12 303 33.63 0.1770
2014-02-14 2013-12-31 13F/A-1 GENUINE PARTS COMMON STOCK 372460105 2,720 2,720 226 0.2081
2014-02-13 2013-12-31 13F GENUINE PARTS COMMON STOCK 372460105 2,720 226 0.2081
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.