Paychex, Inc.
DE ˙ XTRA ˙ US7043261079
86,22 € ↑1,74 (2,06%)
2026-06-05
DEL PRIS
SecurityDE:PCX / Paychex, Inc.
InstitutionRenaissance Technologies Llc
ManagerJames Simons
Latest Disclosed Ownership1,166,201 shares
Latest Disclosed Value $ 107,430,436
Renaissance Technologies Llc reports 6.58% increase in ownership of PCX / Paychex, Inc.

On May 14, 2026 - Renaissance Technologies Llc filed a 13F-HR form disclosing ownership of 1,166,201 shares of Paychex, Inc. (DE:PCX) valued at $92,701,317 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 1,094,201 shares of Paychex, Inc.. This represents a change in shares of 6.58% during the quarter. The current value of the position is $100,549,850 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)
2026-05-14 2026-03-31 13F PAYCHEX COM 704326107 1,166,201 72,000 6.58 107,430 -12.48 0.1680
2026-02-12 2025-12-31 13F PAYCHEX COM 704326107 1,094,201 790,000 259.70 122,747 218.33 0.1904
2025-11-13 2025-09-30 13F PAYCHEX COM 704326107 304,201 304,201 38,561 0.0509
2024-02-13 2023-12-31 13F PAYCHEX COM 704326107 0 -386,201 -100.00 0 -100.00
2023-11-14 2023-09-30 13F PAYCHEX COM 704326107 386,201 321,600 497.83 45 528.57 0.0759
2023-08-11 2023-06-30 13F PAYCHEX COM 704326107 64,601 -27,800 -30.09 7 -30.00 0.0104
2023-05-12 2023-03-31 13F PAYCHEX COM 704326107 92,401 92,401 11 0.0141
2023-02-13 2022-12-31 13F PAYCHEX COM 704326107 0 -271,601 -100.00 0 -100.00
2022-11-14 2022-09-30 13F PAYCHEX COM 704326107 271,601 271,601 30,476 0.0431
2022-05-13 2022-03-31 13F PAYCHEX COM 704326107 0 -413,201 -100.00 0 -100.00
2022-02-11 2021-12-31 13F PAYCHEX COM 704326107 413,201 21,600 5.52 56,402 28.08 0.0702
2021-11-12 2021-09-30 13F PAYCHEX COM 704326107 391,601 391,601 44,036 0.0569
2021-08-13 2021-06-30 13F ITAMAR MED SPONSORED ADS 465437101 0 -33,700 -100.00 0 -100.00
2021-05-13 2021-03-31 13F ITAMAR MED SPONSORED ADS 465437101 33,700 33,700 807 0.0010
2021-02-10 2020-12-31 13F PAYCHEX COM 704326107 0 -121,701 -100.00 0 -100.00
2020-11-13 2020-09-30 13F PAYCHEX COM 704326107 121,701 -473,900 -79.57 9,708 -78.48 0.0097
2020-08-13 2020-06-30 13F PAYCHEX COM 704326107 595,601 386,500 184.84 45,117 242.91 0.0389
2020-08-13 2020-06-30 13F ITAMAR MED SPONSORED ADS 465437101 44,300 3,220 824 0.0007
2020-05-14 2020-03-31 13F PAYCHEX COM 704326107 209,101 209,101 13,157 0.0128
2020-05-14 2020-03-31 13F ITAMAR MED SPONSORED ADS 465437101 41,080 41,080 484 0.0005
2020-02-12 2019-12-31 13F PAYCHEX COM 704326107 0 -605,401 -100.00 0 -100.00
2019-11-13 2019-09-30 13F PAYCHEX COM 704326107 605,401 605,401 50,109 0.0424
2019-05-14 2019-03-31 13F PAYCHEX COM 704326107 0 -578,001 -100.00 0 -100.00
2019-02-12 2018-12-31 13F PAYCHEX COM 704326107 578,001 484,200 516.20 37,657 445.12 0.0412
2018-11-13 2018-09-30 13F PAYCHEX COM 704326107 93,801 58,901 168.77 6,908 221.45 0.0071
2018-08-13 2018-06-30 13F PAYCHEX COM 704326107 34,900 0 0.00 2,149 0.00 0.0024
2018-05-14 2018-03-31 13F PAYCHEX COM 704326107 34,900 -252,700 -87.87 2,149 -89.02 0.0024
2018-02-13 2017-12-31 13F PAYCHEX COM 704326107 287,600 -901,801 -75.82 19,580 -72.54 0.0216
2017-11-13 2017-09-30 13F PAYCHEX COM 704326107 1,189,401 1,148,001 2,772.95 71,316 2,925.71 0.0839
2017-08-11 2017-06-30 13F PAYCHEX COM 704326107 41,400 41,400 -96.52 2,357 -96.69 0.0030
2017-02-13 2016-12-31 13F PAYCHEX COM 704326107 0 -685,901 -100.00 0 -100.00
2016-11-14 2016-09-30 13F PAYCHEX COM 704326107 685,901 685,901 0.00 39,693 0.0702
2016-05-13 2016-03-31 13F PAYCHEX COM 704326107 0 -55,401 -100.00 0 -100.00
2016-02-11 2015-12-31 13F PAYCHEX COM 704326107 55,401 -242,200 -81.38 2,930 -79.33 0.0064
2015-11-12 2015-09-30 13F PAYCHEX COM 704326107 297,601 297,601 437.18 14,175 383.79 0.0338
2015-02-13 2014-12-31 13F PAYCHEX COM 704326107 0 -243,601 -100.00 0 -100.00
2014-11-12 2014-09-30 13F PAYCHEX COM 704326107 243,601 145,100 147.31 10,767 162.99 0.0295
2014-08-13 2014-06-30 13F PAYCHEX COM 704326107 98,501 98,501 4,094 0.0095
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.