Packaging Corporation of America
MX ˙ BMV ˙ US6951561090
SecurityMX:PKG / Packaging Corporation of America
InstitutionBlair William & Co/il
Latest Disclosed Ownership4,621 shares
Latest Disclosed Value $ 980,658
Blair William & Co/il reports 40.37% increase in ownership of PKG / Packaging Corporation of America

On May 8, 2026 - Blair William & Co/il filed a 13F-HR form disclosing ownership of 4,621 shares of Packaging Corporation of America (MX:PKG) valued at $980,658 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 3,292 shares of Packaging Corporation of America. This represents a change in shares of 40.37% 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)
2026-05-08 2026-03-31 13F PACKAGING CORP AMER COM 695156109 4,621 1,329 40.37 981 44.54 0.0028
2026-02-17 2025-12-31 13F PACKAGING CORP AMER COM 695156109 3,292 992 43.13 679 35.33 0.0018
2025-11-12 2025-09-30 13F PACKAGING CORP AMER COM 695156109 2,300 213 10.21 501 27.48 0.0013
2025-07-24 2025-06-30 13F PACKAGING CORP AMER COM 695156109 2,087 -79 -3.65 393 -8.18 0.0011
2025-05-09 2025-03-31 13F PACKAGING CORP AMER COM 695156109 2,166 149 7.39 429 -5.73 0.0013
2025-02-12 2024-12-31 13F PACKAGING CORP AMER COM 695156109 2,017 -136 -6.32 454 -1.94 0.0013
2024-11-12 2024-09-30 13F PACKAGING CORP AMER COM 695156109 2,153 -11 -0.51 464 17.22 0.0014
2024-08-12 2024-06-30 13F PACKAGING CORP AMER COM 695156109 2,164 7 0.32 395 -3.42 0.0012
2024-05-09 2024-03-31 13F PACKAGING CORP AMER COM 695156109 2,157 -3 -0.14 409 16.52 0.0013
2024-02-12 2023-12-31 13F PACKAGING CORP AMER COM 695156109 2,160 209 10.71 352 17.39 0.0012
2023-11-09 2023-09-30 13F PACKAGING CORP AMER COM 695156109 1,951 4 0.21 300 16.34 0.0011
2023-08-11 2023-06-30 13F PACKAGING CORP AMER COM 695156109 1,947 395 25.45 257 19.53 0.0009
2023-05-12 2023-03-31 13F PACKAGING CORP AMER COM 695156109 1,552 1,552 215 0.0009
2022-11-09 2022-09-30 13F PACKAGING CORP AMER COM 695156109 0 -1,516 -100.00 0 -100.00
2022-08-10 2022-06-30 13F PACKAGING CORP AMER COM 695156109 1,516 113 8.05 208 -5.02 0.0009
2022-05-13 2022-03-31 13F PACKAGING CORP AMER COM 695156109 1,403 -68 -4.62 219 9.50 0.0008
2022-02-14 2021-12-31 13F PACKAGING CORP AMER COM 695156109 1,471 -182 -11.01 200 -11.89 0.0006
2021-11-12 2021-09-30 13F PACKAGING CORP AMER COM 695156109 1,653 1,653 227 0.0008
2018-05-15 2018-03-31 13F PACKAGING CORP AMER COM 695156109 0 -7,081 -100.00 0 -100.00
2018-02-14 2017-12-31 13F PACKAGING CORP AMER COM 695156109 7,081 -513 -6.76 854 -1.95 0.0058
2017-11-13 2017-09-30 13F PACKAGING CORP OF AMERICA COM 695156109 7,594 -296 -3.75 871 -0.91 0.0065
2017-08-04 2017-06-30 13F PACKAGING CORP AMER COM 695156109 7,890 -29 -0.37 879 20.08 0.0066
2017-05-10 2017-03-31 13F PACKAGING CORP OF AMERICA COM 695156109 7,919 -39 -0.49 732 8.44 0.0059
2017-02-14 2016-12-31 13F PACKAGING CORP OF AMERICA COM 695156109 7,958 -541 -6.37 675 -2.32 0.0060
2016-11-14 2016-09-30 13F PACKAGING CORP OF AMERICA COM 695156109 8,499 2,529 42.36 691 72.75 0.0061
2016-08-08 2016-06-30 13F PACKAGING CORP OF AMERICA COM 695156109 5,970 5,970 400 0.0037
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.