PDF Solutions, Inc.
DE ˙ DB ˙ US6932821050
41,40 € ↑3,00 (7,81%)
2026-05-29
DELAT PRIS
SecurityDE:PD9 / PDF Solutions, Inc.
InstitutionVanguard Group Inc
Latest Disclosed Ownership0 shares
Ownership 0.00%
Vanguard Group Inc ownership in PD9 / PDF Solutions, Inc.

2026-03-27 - Vanguard Group Inc has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 0 shares of PDF Solutions, Inc. (DE:PD9). This represents 0.0 percent ownership of the company. In their previous filing dated 2024-02-13 , Vanguard Group Inc had reported owning 3,089,669 shares, indicating a decrease of -100.00 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2026-03-27 2026-03-27 13G/A 3,089,669 0 -100.00 0.00 -100.00
2024-02-13 2024-02-13 13G/A 2,253,291 3,089,669 37.12 8.08 34.00
2023-02-09 2023-02-09 13G/A 2,096,952 2,253,291 7.46 6.03 7.30
2022-02-10 2022-02-10 13G/A 2,149,506 2,096,952 -2.44 5.62 -4.26
2021-02-10 2021-02-10 13G/A 1,932,913 2,149,506 11.21 5.87 -1.68
2020-02-12 2020-02-12 13G/A 1,852,837 1,932,913 4.32 5.97 4.01
2019-02-11 2019-02-11 13G 1,852,837 5.74

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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)
2026-01-29 2025-12-31 13F PDF SOLUTIONS COM 693282105 3,089,519 -65,100 -2.06 88,144 8.21 0.0013
2025-11-07 2025-09-30 13F PDF SOLUTIONS COM 693282105 3,154,619 -29,081 -0.91 81,452 19.66 0.0012
2025-08-11 2025-06-30 13F PDF SOLUTIONS COM 693282105 3,183,700 25,405 0.80 68,068 12.78 0.0011
2025-05-09 2025-03-31 13F PDF SOLUTIONS COM 693282105 3,158,295 -14,492 -0.46 60,355 -29.75 0.0011
2025-02-11 2024-12-31 13F PDF SOLUTIONS COM 693282105 3,172,787 -6,460 -0.20 85,919 -14.69 0.0015
2024-11-13 2024-09-30 13F PDF SOLUTIONS COM 693282105 3,179,247 -3,332 -0.10 100,719 -13.01 0.0018
2024-08-13 2024-06-30 13F PDF SOLUTIONS COM 693282105 3,182,579 14,367 0.45 115,782 8.54 0.0022
2024-05-10 2024-03-31 13F PDF SOLUTIONS COM 693282105 3,168,212 78,543 2.54 106,674 7.42 0.0021
2024-03-11 2023-12-31 13F/A-1 PDF SOLUTIONS COM 693282105 3,089,669 160,441 5.48 99,302 4.63 0.0022
2024-02-14 2023-12-31 13F PDF SOLUTIONS COM 693282105 3,089,669 160,441 99,302 0.0019
2023-12-18 2023-09-30 13F/A-1 PDF SOLUTIONS COM 693282105 2,929,228 353,236 13.71 94,907 -18.31 0.0023
2023-11-14 2023-09-30 13F PDF SOLUTIONS COM 693282105 2,929,228 353,236 94,907 0.0023
2023-08-14 2023-06-30 13F PDF SOLUTIONS COM 693282105 2,575,992 312,020 13.78 116,177 21.03 0.0028
2023-07-14 2023-03-31 13F/A-1 PDF SOLUTIONS COM 693282105 2,263,972 10,681 0.47 95,992 49.37 0.0024
2023-05-15 2023-03-31 13F PDF SOLUTIONS COM 693282105 2,263,972 10,681 95,992 0.0024
2023-02-10 2022-12-31 13F PDF SOLUTIONS COM 693282105 2,253,291 -22,394 -0.98 64,264 15.12 0.0017
2022-11-14 2022-09-30 13F PDF SOLUTIONS COM 693282105 2,275,685 131,134 6.11 55,822 21.01 0.0016
2022-08-12 2022-06-30 13F PDF SOLUTIONS COM 693282105 2,144,551 4,471 0.21 46,130 -22.66 0.0013
2022-05-13 2022-03-31 13F PDF SOLUTIONS COM 693282105 2,140,080 43,128 2.06 59,644 -10.53 0.0014
2022-02-14 2021-12-31 13F PDF SOLUTIONS COM 693282105 2,096,952 5,379 0.26 66,662 38.33 0.0015
2021-11-12 2021-09-30 13F PDF SOLUTIONS COM 693282105 2,091,573 28,417 1.38 48,190 28.48 0.0012
2021-08-13 2021-06-30 13F PDF SOLUTIONS COM 693282105 2,063,156 -39,570 -1.88 37,508 0.32 0.0009
2021-05-14 2021-03-31 13F PDF SOLUTIONS COM 693282105 2,102,726 -46,780 -2.18 37,387 -19.47 0.0010
2021-02-12 2020-12-31 13F PDF SOLUTIONS COM 693282105 2,149,506 45,520 2.16 46,429 17.94 0.0013
2020-11-16 2020-09-30 13F PDF SOLUTIONS COM 693282105 2,103,986 108,878 5.46 39,365 0.87 0.0013
2020-08-14 2020-06-30 13F PDF SOLUTIONS COM 693282105 1,995,108 32,295 1.65 39,025 69.64 0.0014
2020-05-15 2020-03-31 13F PDF SOLUTIONS COM 693282105 1,962,813 29,900 1.55 23,004 -29.54 0.0010
2020-02-14 2019-12-31 13F PDF SOLUTIONS COM 693282105 1,932,913 3,855 0.20 32,647 29.48 0.0011
2019-11-14 2019-09-30 13F PDF SOLUTIONS COM 693282105 1,929,058 20,614 1.08 25,213 0.69 0.0009
2019-08-14 2019-06-30 13F PDF SOLUTIONS COM 693282105 1,908,444 1,991 0.10 25,039 6.35 0.0009
2019-05-15 2019-03-31 13F PDF SOLUTIONS COM 693282105 1,906,453 53,616 2.89 23,545 50.74 0.0009
2019-02-14 2018-12-31 13F PDF SOLUTIONS COM 693282105 1,852,837 360,978 24.20 15,620 15.94 0.0007
2018-12-13 2018-09-30 13F/A-2 PDF SOLUTIONS COM 693282105 1,491,859 -325,634 -17.92 13,472 -38.13 0.0005
2018-11-23 2018-09-30 13F/A-1 PDF SOLUTIONS COM 693282105 1,491,859 0 13,472 0.0005
2018-11-14 2018-09-30 13F PDF SOLUTIONS COM 693282105 1,491,859 -325,634 13,472
2018-08-14 2018-06-30 13F PDF SOLUTIONS COM 693282105 1,817,493 429,672 30.96 21,774 34.57 0.0009
2018-05-15 2018-03-31 13F PDF SOLUTIONS COM 693282105 1,387,821 -90,999 -6.15 16,181 -30.31 0.0007
2018-02-14 2017-12-31 13F PDF SOLUTIONS COM 693282105 1,478,820 225,165 17.96 23,218 19.56 0.0010
2017-11-14 2017-09-30 13F PDF SOLUTIONS COM 693282105 1,253,655 77,070 6.55 19,419 0.33 0.0009
2017-08-24 2017-06-30 13F/A-1 PDF SOLUTIONS COM 693282105 1,176,585 54,358 4.84 19,356 -23.75 0.0010
2017-08-11 2017-06-30 13F PDF SOLUTIONS COM 693282105 1,176,585 54,358 19,356
2017-05-12 2017-03-31 13F PDF SOLUTIONS COM 693282105 1,122,227 67,530 6.40 25,385 6.74 0.0013
2017-02-14 2016-12-31 13F PDF SOLUTIONS COM 693282105 1,054,697 7,197 0.69 23,783 24.96 0.0013
2016-11-14 2016-09-30 13F PDF SOLUTIONS COM 693282105 1,047,500 21,820 2.13 19,032 32.64 0.0011
2016-08-10 2016-06-30 13F PDF SOLUTIONS COM 693282105 1,025,680 20,834 2.07 14,349 6.72 0.0009
2016-05-13 2016-03-31 13F PDF SOLUTIONS COM 693282105 1,004,846 74,521 8.01 13,445 33.33 0.0009
2016-02-08 2015-12-31 13F PDF SOLUTIONS COM 693282105 930,325 20,503 2.25 10,084 10.84 0.0007
2015-11-12 2015-09-30 13F/A-1 PDF SOLUTIONS COM 693282105 909,822 48,418 5.62 9,098 -33.99 0.0004
2015-11-12 2015-09-30 13F/A-1 PDF SOLUTIONS COM 693282105 909,822 48,418 9,098 0.0004
2015-08-13 2015-06-30 13F PDF SOLUTIONS COM 693282105 861,404 4,799 0.56 13,782 -10.22 0.0009
2015-05-15 2015-03-31 13F/A-1 PDF SOLUTIONS COM 693282105 856,605 73,635 9.40 15,351 31.94 0.0010
2015-05-14 2015-03-31 13F PDF SOLUTIONS COM 693282105 856,605 15,351
2015-02-12 2014-12-31 13F PDF SOLUTIONS COM 693282105 782,970 20,617 2.70 11,635 21.03 0.0008
2014-11-12 2014-09-30 13F PDF SOLUTIONS COM 693282105 762,353 70,267 10.15 9,613 -34.54 0.0007
2014-08-11 2014-06-30 13F PDF SOLUTIONS COM 693282105 692,086 21,144 3.15 14,686 20.47 0.0012
2014-05-13 2014-03-31 13F PDF SOLUTIONS COM 693282105 670,942 26,031 4.04 12,191 -26.21 0.0010
2014-02-12 2013-12-31 13F PDF SOLUTIONS COM 693282105 644,911 43,559 7.24 16,522 29.29 0.0015
2013-11-07 2013-09-30 13F PDF SOLUTIONS COM 693282105 601,352 4,341 0.73 12,779 16.14 0.0012
2013-08-13 2013-06-30 13F PDF SOLUTIONS COM 693282105 597,011 597,011 11,003 0.0012
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.