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PDF Solutions, Inc. (PDFS) institutional ownership

Latest close $47.72 Jul 27, 2026
Market cap$2.1B 52-week range SectorTechnology
Funds holding · Q1 2026
179
reported PDFS position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
104 buyers · 75 sellers

PDF Solutions, Inc. (PDFS) price and institutional activity

Dates

Q1 2026

$0 bought by 104 investors
Barrow Hanley Mewhinney & Strauss LLCOphir Asset Management Pty Ltd +102 more
$0 sold by 75 investors
Samjo Management, LLCArrowmark Colorado Holdings LLC +73 more
Bought Sold Totals per quarter; hover a bar for the names.

PDF Solutions, Inc. (PDFS) institutional activity · 179

Investor Type Est. change Change Δ Own Date
Barrow Hanley Mewhinney & Strauss LLC · New
Change +1.1M Date Q1 2026
Barrow Hanley Mewhinney & Strauss LLC New· Q1 2026 +1.1M Q1 2026
Ophir Asset Management Pty Ltd · Added
Change +414K Date Q1 2026
Ophir Asset Management Pty Ltd Added· Q1 2026 +414K Q1 2026
Loomis Sayles & Co L P · Added
Change +362K Date Q1 2026
Loomis Sayles & Co L P Added· Q1 2026 +362K Q1 2026
Df Dent & Co Inc · New
Change +353K Date Q1 2026
Df Dent & Co Inc New· Q1 2026 +353K Q1 2026
Samjo Management, LLC · Reduced
Change −231K Date Q1 2026
Samjo Management, LLC Reduced· Q1 2026 −231K Q1 2026
Arrowmark Colorado Holdings LLC · Reduced
Change −137K Date Q1 2026
Arrowmark Colorado Holdings LLC Reduced· Q1 2026 −137K Q1 2026
Divisar Capital Management LLC · Reduced
Change −136K Date Q1 2026
Divisar Capital Management LLC Reduced· Q1 2026 −136K Q1 2026
Janus Henderson Group PLC · Added
Change +124K Date Q1 2026
Janus Henderson Group PLC Added· Q1 2026 +124K Q1 2026
Ranger Investment Management, L.P. · Added
Change +110K Date Q1 2026
Ranger Investment Management, L.P. Added· Q1 2026 +110K Q1 2026
Mutual of America Capital Management LLC · Exited
Change −108K Δ Own −100.0% Date Q1 2026
Mutual of America Capital Management LLC Exited· Q1 2026 −108K −100.0% Q1 2026
Pillsbury Lake Capital LLC · Reduced
Change −105K Date Q1 2026
Pillsbury Lake Capital LLC Reduced· Q1 2026 −105K Q1 2026
Snyder Capital Management L P · Added
Change +105K Date Q1 2026
Snyder Capital Management L P Added· Q1 2026 +105K Q1 2026
William Blair Investment Management, LLC · Reduced
Change −103K Date Q1 2026
William Blair Investment Management, LLC Reduced· Q1 2026 −103K Q1 2026
Squarepoint Ops LLC · Reduced
Change −87K Date Q1 2026
Squarepoint Ops LLC Reduced· Q1 2026 −87K Q1 2026
Inspire Advisors, LLC · New
Change +84K Date Q1 2026
Inspire Advisors, LLC New· Q1 2026 +84K Q1 2026
Data through Q1 2026 · filed Jun 2, 2026
15 of 179

Famous investor activity in PDF Solutions, Inc. (PDFS)

PDF Solutions, Inc. (PDFS) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Strojwas Andrzej · Officer Tax withholding or exercise payment (F) -$91K
Price $66.88 Qty -1K Owned 89K ΔOwn −1.5% Trade date Jul 1, 2026 Filed date Jul 2, 2026
Strojwas Andrzej Officer Tax withholding or exercise payment (F) $66.88 -1K -$91K 89K −1.5% Jul 1, 2026 Jul 2, 2026
Strojwas Andrzej · Officer Grant (A) 5K
Owned 94K ΔOwn +6.0% Trade date Jul 1, 2026 Filed date Jul 2, 2026
Strojwas Andrzej Officer Grant (A) 5K 94K +6.0% Jul 1, 2026 Jul 2, 2026
Zhang Shuo · Director Grant (A) 3K
Owned 25K ΔOwn +12.1% Trade date Jul 1, 2026 Filed date Jul 2, 2026
Zhang Shuo Director Grant (A) 3K 25K +12.1% Jul 1, 2026 Jul 2, 2026
Gustafson Michael B. · Director Grant (A) 3K
Owned 40K ΔOwn +7.2% Trade date Jul 1, 2026 Filed date Jul 2, 2026
Gustafson Michael B. Director Grant (A) 3K 40K +7.2% Jul 1, 2026 Jul 2, 2026
Chan Chi-Foon · Director Grant (A) 3K
Owned 24K ΔOwn +12.5% Trade date Jul 1, 2026 Filed date Jul 2, 2026
Chan Chi-Foon Director Grant (A) 3K 24K +12.5% Jul 1, 2026 Jul 2, 2026
Bronson Joseph R. · Director Grant (A) 3K
Owned 41K ΔOwn +7.0% Trade date Jul 1, 2026 Filed date Jul 2, 2026
Bronson Joseph R. Director Grant (A) 3K 41K +7.0% Jul 1, 2026 Jul 2, 2026
Li Ye Jane · Director Grant (A) 3K
Owned 27K ΔOwn +11.2% Trade date Jul 1, 2026 Filed date Jul 2, 2026
Li Ye Jane Director Grant (A) 3K 27K +11.2% Jul 1, 2026 Jul 2, 2026
Erba Nancy · Director Grant (A) 3K
Owned 12K ΔOwn +29.1% Trade date Jul 1, 2026 Filed date Jul 2, 2026
Erba Nancy Director Grant (A) 3K 12K +29.1% Jul 1, 2026 Jul 2, 2026
Raza Adnan · Officer Tax withholding or exercise payment (F) -$402K
Price $66.88 Qty -6K Owned 65K ΔOwn −8.5% Trade date Jul 1, 2026 Filed date Jul 2, 2026
Raza Adnan Officer Tax withholding or exercise payment (F) $66.88 -6K -$402K 65K −8.5% Jul 1, 2026 Jul 2, 2026
Raza Adnan · Officer Grant (A) 23K
Owned 81K ΔOwn +41.0% Trade date Jul 1, 2026 Filed date Jul 2, 2026
Raza Adnan Officer Grant (A) 23K 81K +41.0% Jul 1, 2026 Jul 2, 2026
Strojwas Andrzej · Officer Tax withholding or exercise payment (F) -$79K
Price $28.53 Qty -3K Owned 89K Trade date Jan 1, 2026 Filed date Jan 5, 2026
Strojwas Andrzej Officer Tax withholding or exercise payment (F) $28.53 -3K -$79K 89K Jan 1, 2026 Jan 5, 2026
Raza Adnan · Officer Tax withholding or exercise payment (F) -$157K
Price $28.53 Qty -5K Owned 71K Trade date Jan 1, 2026 Filed date Jan 5, 2026
Raza Adnan Officer Tax withholding or exercise payment (F) $28.53 -5K -$157K 71K Jan 1, 2026 Jan 5, 2026
Michaels Kimon · Director, Officer Gift (G) -5K
Owned 1.5M Trade date Dec 9, 2025 Filed date Dec 11, 2025
Michaels Kimon Director, Officer Gift (G) -5K 1.5M Dec 9, 2025 Dec 11, 2025
Raza Adnan · Officer Grant (A) 35K
Owned 77K Trade date Aug 1, 2025 Filed date Aug 4, 2025
Raza Adnan Officer Grant (A) 35K 77K Aug 1, 2025 Aug 4, 2025
Strojwas Andrzej · Officer Grant (A) 8K
Owned 92K Trade date Aug 1, 2025 Filed date Aug 4, 2025
Strojwas Andrzej Officer Grant (A) 8K 92K Aug 1, 2025 Aug 4, 2025
15 of 72
15 of 72 Sign in to continue to older insider transactions.

PDF Solutions, Inc. (PDFS) activist and large shareholders

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
BlackRock Inc. 4.8M
% of shares outstanding 12.7% Filing date Jan 23, 2024
BlackRock Inc. 4.8M 12.7% Jan 23, 2024
Vanguard Group Inc 3.1M
% of shares outstanding 8.1% Filing date Feb 13, 2024
Vanguard Group Inc 3.1M 8.1% Feb 13, 2024
Kibarian John Kachig 2.5M
% of shares outstanding 6.6% Filing date Feb 13, 2024
Kibarian John Kachig 2.5M 6.6% Feb 13, 2024
Needham Investment Management L.L.C. 2.0M
% of shares outstanding 5.1% Filing date May 14, 2026
Needham Investment Management L.L.C. 2.0M 5.1% May 14, 2026
Invesco Ltd. 722K
% of shares outstanding 1.9% Filing date Dec 11, 2023
Invesco Ltd. 722K 1.9% Dec 11, 2023
Advantest America, Inc. 0
% of shares outstanding 0.0% Filing date May 27, 2026
Advantest America, Inc. 0 0.0% May 27, 2026
Cowen Prime Advisors LLC
% of shares outstanding 0.0% Filing date Aug 7, 2023
Cowen Prime Advisors LLC 0.0% Aug 7, 2023
T. Rowe Price Associates 2K
% of shares outstanding 0.0% Filing date Feb 14, 2022
T. Rowe Price Associates 2K 0.0% Feb 14, 2022
8 of 8

PDF Solutions, Inc. (PDFS) ownership FAQ

Who owns PDFS?

179 reporting institutions disclosed PDFS position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.