PDF Solutions, Inc.
DE ˙ DB ˙ US6932821050
€ 47,00 ↑1.40 (3.07%)
2026-06-04
PREÇO DA AÇÃO
SecurityDE:PD9 / PDF Solutions, Inc.
InstitutionCitigroup Inc
Latest Disclosed Ownership6,406 shares
Latest Disclosed Value $ 209,540
Citigroup Inc reports 35.54% decrease in ownership of PD9 / PDF Solutions, Inc.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 6,406 shares of PDF Solutions, Inc. (DE:PD9) valued at $175,653 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 9,938 shares of PDF Solutions, Inc.. This represents a change in shares of -35.54% during the quarter. The current value of the position is $301,082 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)
2026-05-11 2026-03-31 13F PDF SOLUTIONS COM 693282105 6,406 -3,532 -35.54 210 -26.15 0.0001
2026-02-13 2025-12-31 13F PDF SOLUTIONS COM 693282105 9,938 -19,587 -66.34 284 -62.86 0.0001
2025-11-10 2025-09-30 13F PDF SOLUTIONS COM 693282105 29,525 -1,629 -5.23 762 14.41 0.0003
2025-08-11 2025-06-30 13F PDF SOLUTIONS COM 693282105 31,154 -15,175 -32.75 666 -24.75 0.0003
2025-05-12 2025-03-31 13F PDF SOLUTIONS COM 693282105 46,329 -1,198 -2.52 885 -31.24 0.0005
2025-02-12 2024-12-31 13F PDF SOLUTIONS COM 693282105 47,527 6,571 16.04 1,287 -0.77 0.0008
2024-11-12 2024-09-30 13F PDF SOLUTIONS COM 693282105 40,956 6,509 18.90 1,297 3.51 0.0008
2024-08-12 2024-06-30 13F PDF SOLUTIONS COM 693282105 34,447 13,344 63.23 1,253 76.48 0.0008
2024-05-10 2024-03-31 13F PDF SOLUTIONS COM 693282105 21,103 32 0.15 711 4.87 0.0005
2024-02-09 2023-12-31 13F PDF SOLUTIONS COM 693282105 21,071 7,835 59.19 677 58.18 0.0005
2023-12-06 2023-09-30 13F/A-1 PDF SOLUTIONS COM 693282105 13,236 -13,043 -49.63 429 -63.88 0.0003
2023-11-09 2023-09-30 13F PDF SOLUTIONS COM 693282105 13,236 -13,043 429 0.0003
2023-08-10 2023-06-30 13F PDF SOLUTIONS COM 693282105 26,279 8,811 50.44 1,185 60.14 0.0008
2023-05-11 2023-03-31 13F PDF SOLUTIONS COM 693282105 17,468 -3,612 -17.13 741 23.13 0.0005
2023-02-09 2022-12-31 13F PDF SOLUTIONS COM 693282105 21,080 -605 -2.79 601 12.97 0.0005
2022-11-10 2022-09-30 13F PDF SOLUTIONS COM 693282105 21,685 5,363 32.86 532 51.57 0.0004
2022-08-10 2022-06-30 13F PDF SOLUTIONS COM 693282105 16,322 -9,577 -36.98 351 -51.39 0.0003
2022-05-12 2022-03-31 13F PDF SOLUTIONS COM 693282105 25,899 2,734 11.80 722 -1.90 0.0004
2022-02-10 2021-12-31 13F PDF SOLUTIONS COM 693282105 23,165 7,313 46.13 736 101.64 0.0004
2021-11-10 2021-09-30 13F PDF SOLUTIONS COM 693282105 15,852 -1,480 -8.54 365 15.87 0.0002
2021-08-10 2021-06-30 13F PDF SOLUTIONS COM 693282105 17,332 14,014 422.36 315 433.90 0.0002
2021-05-13 2021-03-31 13F PDF SOLUTIONS COM 693282105 3,318 -4,318 -56.55 59 -64.24 0.0000
2021-02-11 2020-12-31 13F PDF SOLUTIONS COM 693282105 7,636 5,412 243.35 165 292.86 0.0001
2020-11-12 2020-09-30 13F PDF SOLUTIONS COM 693282105 2,224 -10,933 -83.10 42 -83.66 0.0000
2020-08-12 2020-06-30 13F PDF SOLUTIONS COM 693282105 13,157 3,262 32.97 257 121.55 0.0002
2020-05-12 2020-03-31 13F PDF SOLUTIONS COM 693282105 9,895 -6,265 -38.77 116 -57.51 0.0001
2020-02-12 2019-12-31 13F PDF SOLUTIONS COM 693282105 16,160 -1,288 -7.38 273 19.74 0.0002
2019-11-08 2019-09-30 13F PDF SOLUTIONS COM 693282105 17,448 -3,489 -16.66 228 -16.79 0.0002
2019-08-12 2019-06-30 13F PDF SOLUTIONS COM 693282105 20,937 4,290 25.77 274 33.66 0.0002
2019-05-13 2019-03-31 13F PDF SOLUTIONS COM 693282105 16,647 -782 -4.49 205 39.46 0.0002
2019-02-12 2018-12-31 13F PDF SOLUTIONS COM 693282105 17,429 275 1.60 147 -5.16 0.0001
2018-11-13 2018-09-30 13F PDF SOLUTIONS COM 693282105 17,154 12,079 238.01 155 154.10 0.0001
2018-08-10 2018-06-30 13F PDF SOLUTIONS COM 693282105 5,075 -1,682 -24.89 61 -22.78 0.0001
2018-05-11 2018-03-31 13F PDF SOLUTIONS COM 693282105 6,757 6,481 2,348.19 79 1,875.00 0.0001
2018-02-12 2017-12-31 13F PDF SOLUTIONS COM 693282105 276 -1,569 -85.04 4 -86.21 0.0000
2017-11-13 2017-09-30 13F PDF SOLUTIONS COM 693282105 1,845 661 55.83 29 52.63 0.0000
2017-08-11 2017-06-30 13F PDF SOLUTIONS COM 693282105 1,184 -1,494 -55.79 19 -68.33 0.0000
2017-05-12 2017-03-31 13F PDF SOLUTIONS COM 693282105 2,678 -27,795 -91.21 60 -91.27 0.0001
2017-02-10 2016-12-31 13F PDF SOLUTIONS COM 693282105 30,473 24,881 444.94 687 580.20 0.0006
2016-11-10 2016-09-30 13F PDF SOLUTIONS COM 693282105 5,592 -507 -8.31 101 17.44 0.0001
2016-08-12 2016-06-30 13F PDF SOLUTIONS COM 693282105 6,099 -23,037 -79.07 86 -77.95 0.0001
2016-05-13 2016-03-31 13F PDF SOLUTIONS COM 693282105 29,136 11,810 68.16 390 107.45 0.0004
2016-02-12 2015-12-31 13F PDF SOLUTIONS COM 693282105 17,326 13,623 367.89 188 408.11 0.0002
2015-11-13 2015-09-30 13F PDF SOLUTIONS COM 693282105 3,703 -2,459 -39.91 37 -62.63 0.0000
2015-08-13 2015-06-30 13F PDF SOLUTIONS COM 693282105 6,162 733 13.50 99 1.02 0.0001
2015-05-14 2015-03-31 13F PDF SOLUTIONS COM 693282105 5,429 -5,535 -50.48 98 -39.88 0.0001
2015-02-17 2014-12-31 13F PDF SOLUTIONS COM 693282105 10,964 2,164 24.59 163 46.85 0.0001
2014-11-14 2014-09-30 13F PDF SOLUTIONS COM 693282105 8,800 1,842 26.47 111 -25.00 0.0001
2014-08-14 2014-06-30 13F PDF SOLUTIONS COM 693282105 6,958 -4,261 -37.98 148 -27.80 0.0001
2014-05-15 2014-03-31 13F PDF SOLUTIONS COM 693282105 11,219 -6,280 -35.89 205 -54.24 0.0002
2014-02-14 2013-12-31 13F PDF SOLUTIONS COM 693282105 17,499 10,147 138.02 448 185.35 0.0004
2013-11-14 2013-09-30 13F PDF SOLUTIONS COM 693282105 7,352 -681 -8.48 157 6.08 0.0001
2013-08-14 2013-06-30 13F PDF SOLUTIONS COM 693282105 8,033 8,033 148 0.0001
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.