PDF SOLUTIONS INC - Common Stock, par value $0.00015 per share (PDFS)

CUSIP: 693282105

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class
Equity / Common Stock, par value $0.00015 per share
Total 13F shares
32,188,100
Total 13F value
$1,052,684,102
Holder snapshot 6 visible 7 signals
Share change
+1,626,542
Put/Call ratio
318%
SEC-reported price per share
$32.71
Number of holders
205
Value change
+$55,049,169
Number of buys
104
Open additional details 1 more signal available
Number of sells
77
Security identity Names, identifiers, and filing context for this profile. 1 source field
Shares outstanding
39,660,784

Security key

693282105

Report period

Q1 2026

Institutions

205

Top holders

10

PDFS full security history Ownership snapshot Full 13F holder table Previous quarter: Q4 2025 PDF SOLUTIONS INC SEC filings PDF SOLUTIONS INC company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Ownership snapshot

Top reported holders of PDFS - PDF SOLUTIONS INC - Common Stock, par value $0.00015 per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader
John Kachig Kibarian
Disclosed value leader
BlackRock, Inc.
Comparable rows
15/15
Latest evidence
31 Mar 2026
13D/G 3/4/5 13F Lead comparable stake: 6.5% 13D/G row: John Kachig Kibarian Showing 1-6 of 15 holder rows.

Quick read

John Kachig Kibarian leads the comparable SEC ownership view at 6.5%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens John Kachig Kibarian's linked filing trail.
Comparable ownership Top 5
John Kachig Kibarian 6.5%
NEEDHAM INVESTMENT MANAGEMENT LLC 5.1%
Kimon Michaels 4%
Adnan Raza 0.24%
Andrzej Strojwas 0.22%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
John Kachig Kibarian
13D/G 3/4/5
KIBARIAN JOHN KACHIG · PRESIDENT AND CEO, Director
13D/G 3/4/5
6.5%
$80,871,679
2,562,474 shares
 +$1,578,000 31 Dec 2025
NEEDHAM INVESTMENT MANAGEMENT LLC
13D/G 13F
Needham Investment Management L.L.C. · Company
13D/G 13F
5.1%
$78,541,441
2,022,700 shares
 +$2,240,491 31 Mar 2026
Kimon Michaels
3/4/5
EVP of Products and Solutions, Director
3/4/5
4%
$43,703,396
1,570,370 shares
 — 09 Dec 2025
Adnan Raza
3/4/5
EVP, Finance and CFO
3/4/5
0.24%
$2,652,806
93,383 shares
 — 01 Jan 2026
Andrzej Strojwas
3/4/5
Chief Technology Officer
3/4/5
0.22%
$2,544,990
89,204 shares
 — 01 Jan 2026
Nancy Erba
3/4/5
Director
3/4/5
0.1%
$791,597
41,122 shares
 — 01 Jul 2025
How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions
205
Shares
32,188,100
Rows available
205
Investor Option Weight % Change % SEC-reported value * Price Shares Share Change Activity Report Period

* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2026 vs Q4 2025 Across Filers

Q4 2025 holders
187
Q1 2026 holders
205
Holder diff
18
Investor Q4 2025 Shares Q1 2026 Shares Share Diff Share Chg % Q4 2025 value Q1 2026 value Value change Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
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