Packaging Corporation of America
US ˙ NYSE ˙ US6951561090

SecurityPKG / Packaging Corporation of America
InstitutionSei Investments Co
Latest Disclosed Ownership95,568 shares
Latest Disclosed Value $ 19,708,791
Sei Investments Co reports 0.81% increase in ownership of PKG / Packaging Corporation of America

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 95,568 shares of Packaging Corporation of America (US:PKG) valued at $19,708,989 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 94,803 shares of Packaging Corporation of America. This represents a change in shares of 0.81% during the quarter. The current value of the position is $21,444,504 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)
2026-02-13 2025-12-31 13F PACKAGING CORP AMER COM 695156109 95,568 765 0.81 19,709 -4.61 0.0195
2025-11-13 2025-09-30 13F PACKAGING CORP AMER COM 695156109 94,803 62,355 192.17 20,661 237.86 0.0222
2025-08-14 2025-06-30 13F PACKAGING CORP AMER COM 695156109 32,448 -25,074 -43.59 6,115 -46.32 0.0071
2025-05-14 2025-03-31 13F/A-1 PACKAGING CORP AMER COM 695156109 57,522 -67,048 -53.82 11,391 -59.39 0.0147
2025-05-13 2025-03-31 13F PACKAGING CORP AMER COM 695156109 52,198 -72,372 11,312 0.0123
2025-02-11 2024-12-31 13F PACKAGING CORP AMER COM 695156109 124,570 -47,418 -27.57 28,047 -24.29 0.0360
2024-11-12 2024-09-30 13F PACKAGING CORP AMER COM 695156109 171,988 16,463 10.59 37,047 30.48 0.0481
2024-08-13 2024-06-30 13F PACKAGING CORP AMER COM 695156109 155,525 -34,560 -18.18 28,393 -21.29 0.0402
2024-05-07 2024-03-31 13F PACKAGING CORP AMER COM 695156109 190,085 31,706 20.02 36,076 39.82 0.0529
2024-02-14 2023-12-31 13F PACKAGING CORP AMER COM 695156109 158,379 -21,626 -12.01 25,802 -6.65 0.0414
2023-11-14 2023-09-30 13F PACKAGING CORP AMER COM 695156109 180,005 -26,824 -12.97 27,640 1.12 0.0497
2023-08-11 2023-06-30 13F PACKAGING CORP AMER COM 695156109 206,829 -11,663 -5.34 27,334 -9.89 0.0477
2023-05-12 2023-03-31 13F PACKAGING CORP AMER COM 695156109 218,492 19,323 9.70 30,333 19.07 0.0563
2023-02-10 2022-12-31 13F PACKAGING CORP AMER COM 695156109 199,169 -3,479 -1.72 25,476 11.95 0.0566
2022-11-14 2022-09-30 13F PACKAGING CORP AMER COM 695156109 202,648 -15,103 -6.94 22,755 -24.05 0.0508
2022-08-15 2022-06-30 13F PACKAGING CORP AMER COM 695156109 217,751 55,348 34.08 29,959 18.15 0.0647
2022-05-13 2022-03-31 13F PACKAGING CORP AMER COM 695156109 162,403 4,701 2.98 25,356 18.08 0.0510
2022-02-14 2021-12-31 13F PACKAGING CORP AMER COM 695156109 157,702 55,698 54.60 21,473 53.16 0.0403
2021-11-12 2021-09-30 13F PACKAGING CORP AMER COM 695156109 102,004 9,104 9.80 14,020 11.44 0.0294
2021-08-06 2021-06-30 13F PACKAGING CORP AMER COM 695156109 92,900 40,573 77.54 12,581 78.78 0.0279
2021-05-12 2021-03-31 13F PACKAGING CORP AMER COM 695156109 52,327 -5,165 -8.98 7,037 -11.25 0.0177
2021-02-08 2020-12-31 13F PACKAGING CORP AMER COM 695156109 57,492 -18,182 -24.03 7,929 -3.91 0.0205
2020-12-04 2020-09-30 13F/A-1 PACKAGING CORP AMER COM 695156109 75,674 19,623 35.01 8,252 47.52 0.0239
2020-11-06 2020-09-30 13F PACKAGING CORP AMER COM 695156109 79,136 23,085 8,630 20,779.1212
2020-08-17 2020-06-30 13F/A-1 PACKAGING CORP AMER COM 695156109 56,051 6,931 14.11 5,594 31.16 0.0174
2020-08-11 2020-06-30 13F PACKAGING CORP AMER COM 695156109 32,901 -16,219 3,643 9,881.8314
2020-05-14 2020-03-31 13F PACKAGING CORP AMER COM 695156109 49,120 12,686 34.82 4,265 4.02 0.0157
2020-02-06 2019-12-31 13F PACKAGING CORP AMER COM 695156109 36,434 -4,118 -10.15 4,100 -5.66 0.0122
2019-11-12 2019-09-30 13F PACKAGING CORP AMER COM 695156109 40,552 -1,281 -3.06 4,346 9.78 0.0111
2019-08-14 2019-06-30 13F PACKAGING CORP AMER COM 695156109 41,833 -216,410 -83.80 3,959 -84.60 0.0129
2019-05-15 2019-03-31 13F PACKAGING CORP AMER COM 695156109 258,243 11,427 4.63 25,712 14.20 0.0863
2019-02-13 2018-12-31 13F PACKAGING CORP AMER COM 695156109 246,816 60,677 32.60 22,515 10.00 0.0802
2018-11-08 2018-09-30 13F PACKAGING CORP AMER COM 695156109 186,139 52,630 39.42 20,469 37.14 0.0742
2018-08-03 2018-06-30 13F PACKAGING CORP AMER COM 695156109 133,509 12,841 10.64 14,926 9.75 0.0507
2018-05-11 2018-03-31 13F PACKAGING CORP AMER COM 695156109 120,668 8,172 7.26 13,600 0.29 0.0521
2018-02-08 2017-12-31 13F PACKAGING CORP AMER COM 695156109 112,496 7,879 7.53 13,561 13.03 0.0471
2017-11-06 2017-09-30 13F PACKAGING CORP AMER COM 695156109 104,617 24,364 30.36 11,998 34.22 0.0426
2017-07-31 2017-06-30 13F PACKAGING CORP AMER COM 695156109 80,253 13,715 20.61 8,939 46.61 0.0356
2017-05-05 2017-03-31 13F PACKAGING CORP AMER COM 695156109 66,538 41,358 164.25 6,097 185.44 0.0267
2017-02-02 2016-12-31 13F PACKAGING CORP AMER COM 695156109 25,180 681 2.78 2,136 7.28 0.0103
2016-11-04 2016-09-30 13F PACKAGING CORP AMER COM 695156109 24,499 -11,328 -31.62 1,991 -16.97 0.0101
2016-08-11 2016-06-30 13F PACKAGING CORP AMER COM 695156109 35,827 -58,138 -61.87 2,398 -57.74 0.0144
2016-05-10 2016-03-31 13F/A-1 PACKAGING CORP AMER COM 695156109 93,965 59,745 174.59 5,675 162.97 0.0353
2016-02-03 2015-12-31 13F PACKAGING CORP AMER COM 695156109 34,220 32,086 1,503.56 2,158 1,572.87 0.0132
2015-11-02 2015-09-30 13F/A-1 PACKAGING CORP AMER COM 695156109 2,134 -35,745 -94.37 129 -94.55 0.0012
2015-10-30 2015-09-30 13F PACKAGING CORP AMER COM 695156109 2,134 129
2015-08-07 2015-06-30 13F/A-1 PACKAGING CORP AMER COM 695156109 37,879 -6,189 -14.04 2,368 -31.24 0.0214
2015-08-04 2015-06-30 13F PACKAGING CORP AMER COM 695156109 37,879 -6,189 2,368 0.0214
2015-05-14 2015-03-31 13F/A-1 PACKAGING CORP AMER COM 695156109 44,068 43,103 4,466.63 3,444 4,554.05 0.0299
2015-05-01 2015-03-31 13F PACIRA PHARMACEUTICALS NOTE 3.250% 2/0 695156109 44,068 3,444
2015-02-10 2014-12-31 13F PACKAGING CORP AMER COM 695156109 965 965 74 0.0007
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.