PDF Solutions, Inc.
DE ˙ DB ˙ US6932821050
41,40 € ↑3,00 (7,81%)
2026-05-29
DEL PRIS
SecurityDE:PD9 / PDF Solutions, Inc.
InstitutionState Street Corp
Latest Disclosed Ownership1,192,408 shares
Latest Disclosed Value $ 39,003,666
State Street Corp reports 3.55% increase in ownership of PD9 / PDF Solutions, Inc.

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 1,192,408 shares of PDF Solutions, Inc. (DE:PD9) valued at $32,695,827 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,151,576 shares of PDF Solutions, Inc.. This represents a change in shares of 3.55% during the quarter. The current value of the position is $49,365,691 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)
2026-05-15 2026-03-31 13F PDF SOLUTIONS COM 693282105 1,192,408 40,832 3.55 39,004 18.72 0.0013
2026-02-13 2025-12-31 13F PDF SOLUTIONS COM 693282105 1,151,576 5,619 0.49 32,854 11.04 0.0011
2025-11-14 2025-09-30 13F PDF SOLUTIONS COM 693282105 1,145,957 8,671 0.76 29,589 21.69 0.0010
2025-08-14 2025-06-30 13F PDF SOLUTIONS COM 693282105 1,137,286 -12,000 -1.04 24,315 10.71 0.0009
2025-05-15 2025-03-31 13F PDF SOLUTIONS COM 693282105 1,149,286 -53,413 -4.44 21,963 -32.57 0.0009
2025-02-14 2024-12-31 13F PDF SOLUTIONS COM 693282105 1,202,699 55,077 4.80 32,569 -10.42 0.0013
2024-11-14 2024-09-30 13F PDF SOLUTIONS COM 693282105 1,147,622 23,148 2.06 36,357 -11.13 0.0015
2024-08-14 2024-06-30 13F PDF SOLUTIONS COM 693282105 1,124,474 -12,892 -1.13 40,908 6.82 0.0018
2024-05-15 2024-03-31 13F PDF SOLUTIONS COM 693282105 1,137,366 23,760 2.13 38,295 7.00 0.0017
2024-02-14 2023-12-31 13F PDF SOLUTIONS COM 693282105 1,113,606 62,388 5.93 35,791 5.09 0.0017
2023-11-14 2023-09-30 13F PDF SOLUTIONS COM 693282105 1,051,218 30,765 3.01 34,059 -25.99 0.0019
2023-08-14 2023-06-30 13F PDF SOLUTIONS COM 693282105 1,020,453 39,886 4.07 46,022 10.69 0.0024
2023-05-15 2023-03-31 13F PDF SOLUTIONS COM 693282105 980,567 25,178 2.64 41,576 52.59 0.0023
2023-05-15 2022-12-31 13F/A-99 PDF SOLUTIONS COM 693282105 955,389 -34,528 -3.49 27,248 12.21 0.0016
2023-05-15 2022-12-31 13F PDF SOLUTIONS COM 693282105 955,389 -34,528 27,248 0.0016
2022-11-15 2022-09-30 13F PDF SOLUTIONS COM 693282105 989,917 -15,094 -1.50 24,283 12.33 0.0015
2022-08-15 2022-06-30 13F PDF SOLUTIONS COM 693282105 1,005,011 27,731 2.84 21,618 -20.63 0.0013
2022-05-16 2022-03-31 13F PDF SOLUTIONS COM 693282105 977,280 27,828 2.93 27,237 -9.76 0.0013
2022-02-14 2021-12-31 13F PDF SOLUTIONS COM 693282105 949,452 8,902 0.95 30,183 39.28 0.0014
2021-11-15 2021-09-30 13F PDF SOLUTIONS COM 693282105 940,550 10,922 1.17 21,670 28.22 0.0011
2021-08-16 2021-06-30 13F PDF SOLUTIONS COM 693282105 929,628 41,673 4.69 16,901 7.05 0.0009
2021-07-09 2021-03-31 13F/A-1 PDF SOLUTIONS COM 693282105 887,955 6,810 0.77 15,788 -17.05 0.0009
2021-05-17 2021-03-31 13F PDF SOLUTIONS COM 693282105 887,955 6,810 15,788 0.0009
2021-02-16 2020-12-31 13F PDF SOLUTIONS COM 693282105 881,145 -4,625 -0.52 19,033 14.84 0.0012
2020-11-10 2020-09-30 13F PDF SOLUTIONS COM 693282105 885,770 -19,514 -2.16 16,573 -6.40 0.0011
2020-08-14 2020-06-30 13F PDF SOLUTIONS COM 693282105 905,284 25,299 2.87 17,707 71.70 0.0013
2020-06-19 2020-03-31 13F/A-1 PDF SOLUTIONS COM 693282105 879,985 56,774 6.90 10,313 -25.83 0.0009
2020-05-11 2020-03-31 13F PDF SOLUTIONS COM 693282105 879,985 56,774 10,313 905.6891
2020-02-06 2019-12-31 13F PDF SOLUTIONS COM 693282105 823,211 19,652 2.45 13,904 32.38 0.0010
2019-11-14 2019-09-30 13F PDF SOLUTIONS COM 693282105 803,559 7,002 0.88 10,503 0.50 0.0008
2019-08-14 2019-06-30 13F PDF SOLUTIONS COM 693282105 796,557 13,038 1.66 10,451 8.01 0.0008
2019-05-15 2019-03-31 13F PDF SOLUTIONS COM 693282105 783,519 42,764 5.77 9,676 54.94 0.0008
2019-02-12 2018-12-31 13F PDF SOLUTIONS COM 693282105 740,755 -21,124 -2.77 6,245 -9.24 0.0006
2018-11-09 2018-09-30 13F PDF SOLUTIONS Common equity shares 693282105 761,879 50,409 7.09 6,881 -19.27 0.0005
2018-08-14 2018-06-30 13F PDF SOLUTIONS Common equity shares 693282105 711,470 16,046 2.31 8,524 5.16 0.0007
2018-05-15 2018-03-31 13F PDF SOLUTIONS Common equity shares 693282105 695,424 13,867 2.03 8,106 -24.29 0.0007
2018-02-14 2017-12-31 13F PDF SOLUTIONS Common equity shares 693282105 681,557 164,592 31.84 10,706 33.67 0.0009
2017-11-14 2017-09-30 13F PDF SOLUTIONS Common equity shares 693282105 516,965 -1,301 -0.25 8,009 -6.07 0.0007
2017-08-14 2017-06-30 13F PDF SOLUTIONS Common equity shares 693282105 518,266 38,359 7.99 8,527 -21.46 0.0008
2017-05-15 2017-03-31 13F PDF SOLUTIONS Common equity shares 693282105 479,907 11,678 2.49 10,857 2.80 0.0010
2017-02-09 2016-12-31 13F PDF SOLUTIONS Common equity shares 693282105 468,229 4,023 0.87 10,561 25.20 0.0010
2017-01-13 2016-09-30 13F/A-1 PDF SOLUTIONS Common equity shares 693282105 464,206 3,367 0.73 8,435 30.84 0.0009
2016-11-14 2016-09-30 13F PDF SOLUTIONS Common equity shares 693282105 464,206 8,435
2016-08-12 2016-06-30 13F PDF SOLUTIONS Common equity shares 693282105 460,839 -2,837 -0.61 6,447 3.90 0.0007
2016-05-20 2016-03-31 13F/A-1 PDF SOLUTIONS Common equity shares 693282105 463,676 -2,591 -0.56 6,205 22.73 0.0007
2016-05-12 2016-03-31 13F PDF SOLUTIONS Common equity shares 693282105 463,676 6,205
2016-02-16 2015-12-31 13F PDF SOLUTIONS Common equity shares 693282105 466,267 7,510 1.64 5,056 10.20 0.0006
2015-11-16 2015-09-30 13F PDF SOLUTIONS Common equity shares 693282105 458,757 -3,502 -0.76 4,588 -37.97 0.0005
2015-08-13 2015-06-30 13F PDF SOLUTIONS Common equity shares 693282105 462,259 -1,518 -0.33 7,396 -11.02 0.0008
2015-05-15 2015-03-31 13F PDF SOLUTIONS Common equity shares 693282105 463,777 19,714 4.44 8,312 25.92 0.0009
2015-02-11 2014-12-31 13F PDF SOLUTIONS Common equity shares 693282105 444,063 6,286 1.44 6,601 19.61 0.0007
2014-11-12 2014-09-30 13F/A-1 PDF SOLUTIONS Common equity shares 693282105 437,777 8,944 2.09 5,519 -39.36 0.0006
2014-11-10 2014-09-30 13F PDF SOLUTIONS Common equity shares 693282105 437,777 5,519
2014-08-12 2014-06-30 13F PDF SOLUTIONS Common equity shares 693282105 428,833 -6,372 -1.46 9,101 15.09 0.0010
2014-05-15 2014-03-31 13F/A-1 PDF SOLUTIONS Common equity shares 693282105 435,205 18,637 4.47 7,908 -25.89 0.0009
2014-05-13 2014-03-31 13F PDF SOLUTIONS Common equity shares 693282105 435,205 7,908
2014-02-06 2013-12-31 13F/A-1 PDF SOLUTIONS Common equity shares 693282105 416,568 3,178 0.77 10,671 21.44 0.0012
2014-02-06 2013-12-31 13F PDF SOLUTIONS Common equity shares 693282105 355,978 4,905
2013-11-12 2013-09-30 13F PDF SOLUTIONS Common Stock 693282105 413,390 6,267 1.54 8,787 17.10 0.0011
2013-08-08 2013-06-30 13F PDF SOLUTIONS Common Stock 693282105 407,123 407,123 7,504 0.0010
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.