Packaging Corporation of America
US ˙ NYSE ˙ US6951561090

SecurityPKG / Packaging Corporation of America
InstitutionDiamant Asset Management, Inc.
Latest Disclosed Ownership893,446 shares
Latest Disclosed Value $ 893,446
Diamant Asset Management, Inc. reports 19,710.33% increase in ownership of PKG / Packaging Corporation of America

On April 22, 2026 - Diamant Asset Management, Inc. filed a 13F-HR form disclosing ownership of 893,446 shares of Packaging Corporation of America (US:PKG) valued at $189,607,110 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 4,510 shares of Packaging Corporation of America. This represents a change in shares of 19,710.33% during the quarter. The current value of the position is $200,480,348 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-04-22 2026-03-31 13F PACKAGING CORP AMER COM COM 695156109 893,446 888,936 19,710.33 893 -3.98 0.6510
2026-02-06 2025-12-31 13F PACKAGING CORP AMER COM Com 695156109 4,510 0 0.00 930 -5.30 0.6724
2025-10-29 2025-09-30 13F PACKAGING CORP AMER COM Comm 695156109 4,510 0 0.00 983 15.67 0.7240
2025-07-16 2025-06-30 13F PACKAGING CORP AMER COM Stock 695156109 4,510 0 0.00 850 -4.93 0.6473
2025-05-15 2025-03-31 13F PACKAGING CORP AMER COM COM 695156109 4,510 115 2.62 893 -9.71 0.6778
2025-01-22 2024-12-31 13F PACKAGING CORP AMER COM Com 695156109 4,395 -200 -4.35 989 0.00 0.6328
2024-11-20 2024-09-30 13F PACKAGING CORP AMER COM COM 695156109 4,595 0 0.00 990 18.02 0.6202
2024-08-06 2024-06-30 13F PACKAGING CORP AMER COM Com 695156109 4,595 0 0.00 839 -3.90 0.5612
2024-04-24 2024-03-31 13F PACKAGING CORP AMER COM Stock 695156109 4,595 0 0.00 872 16.58 0.6054
2024-02-13 2023-12-31 13F PACKAGING CORP AMER COM Stock 695156109 4,595 0 0.00 749 6.10 0.5546
2023-11-08 2023-09-30 13F PACKAGING CORP AMER COM COM 695156109 4,595 0 0.00 706 16.14 0.5803
2023-07-21 2023-06-30 13F PACKAGING CORP AMER COM 695156109 4,595 0 0.00 607 -4.71 0.4641
2023-05-16 2023-03-31 13F/A-1 PACKAGING CORP AMER Com 695156109 4,595 0 0.00 638 8.52 0.5229
2023-05-15 2023-03-31 13F PACKAGING CORP AMER COM COM 695156109 4,595 0 588 0.5277
2023-02-08 2022-12-31 13F PACKAGING CORP AMER COM COM 695156109 4,595 0 0.00 588 13.76 0.5277
2022-10-21 2022-09-30 13F PACKAGING CORP AMER COM COM 695156109 4,595 0 0.00 516 -18.35 0.5006
2022-08-02 2022-06-30 13F PACKAGING CORP AMER COM Stock 695156109 4,595 0 0.00 632 -11.85 0.5688
2022-05-12 2022-03-31 13F PACKAGING CORP AMER COM 695156109 4,595 -600 -11.55 717 1.41 0.5491
2022-01-31 2021-12-31 13F PACKAGING CORP AMER COM 695156109 5,195 -5 -0.10 707 -1.12 0.5168
2021-10-21 2021-09-30 13F PACKAGING CORP AMER COM 695156109 5,200 0 0.00 715 2.29 0.5912
2021-04-19 2021-03-31 13F PACKAGING CORP AMER COM 695156109 5,200 0 0.00 699 -2.51 0.6140
2021-01-21 2020-12-31 13F PACKAGING CORP AMER COM 695156109 5,200 0 0.00 717 26.46 0.6379
2020-11-02 2020-09-30 13F PACKAGING CORP AMER COM 695156109 5,200 0 0.00 567 9.25 0.5451
2020-07-28 2020-06-30 13F PACKAGING CORP AMER COM 695156109 5,200 -25 -0.48 519 14.32 0.5465
2020-04-23 2020-03-31 13F PACKAGING CORP AMER COM 695156109 5,225 -700 -11.81 454 -31.63 0.5859
2020-02-04 2019-12-31 13F PACKAGING CORP AMER COM 695156109 5,925 0 0.00 664 5.56 0.6164
2019-10-31 2019-09-30 13F PACKAGING CORP AMER COM 695156109 5,925 -400 -6.32 629 4.31 0.6302
2019-07-22 2019-06-30 13F PACKAGING CORP AMER COM 695156109 6,325 0 0.00 603 -4.13 0.5968
2019-04-30 2019-03-31 13F PACKAGING CORP AMER COM 695156109 6,325 0 0.00 629 19.13 0.6319
2019-01-30 2018-12-31 13F PACKAGING CORP AMER COM 695156109 6,325 325 5.42 528 -19.76 0.5924
2018-10-23 2018-09-30 13F PACKAGING CORP AMER COM 695156109 6,000 -950 -13.67 658 -15.32 0.6096
2018-07-24 2018-06-30 13F PACKAGING CORP AMER COM 695156109 6,950 0 0.00 777 -0.77 0.7515
2018-05-07 2018-03-31 13F PACKAGING CORP AMER COM 695156109 6,950 4,550 189.58 783 170.93 0.7680
2018-02-13 2017-12-31 13F PACKAGING CORP AMER COM 695156109 2,400 2,400 289 0.0423
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.