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PDFS in the 13F filings

PDF Solutions Inc · CUSIP 693282105

Sector · Software and IT servicesTheme · Cloud and enterprise software· L3VLUP-definedTheme · Prepackaged software
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q1 2024Q4 2023Q3 2023Q2 2023Q1 2023Q2 2017Q1 2017Q2 2016Q4 2013
Quarter end
30 Jun 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 6 Aug 2026
Managers listing it
22
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q1 2026 and Q2 2026; 1 listed it in both
Shares listed
3,319,645
combined, among listed positions
Reported value
$233m
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 15 buyers (opened or added shares) and 8 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +1,425,144.

Managers listing PDFS in Q2 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2026, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

22 of 22 holders

ActionFiling
Janus Henderson Group Ltd927,781$66munder 0.1%Trimmed-107,88514 Aug 2026 (the filing on sec.gov)
Point72 Asset Management LP598,902$42munder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Invesco Ltd422,931$30munder 0.1%Added+278,59114 Aug 2026 (the filing on sec.gov)
Baillie Gifford & Co345,472$24munder 0.1%Newnew6 Aug 2026 (the filing on sec.gov)
Fidelity (FMR LLC)310,389$22munder 0.1%Added+8,18013 Aug 2026 (the filing on sec.gov)
Susquehanna International Group LLP126,387$8.9munder 0.1%Added+87,63514 Aug 2026 (the filing on sec.gov)
Jane Street Group LLC102,116$7.2munder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Squarepoint Ops LLC95,294$6.7munder 0.1%Trimmed-35,62514 Aug 2026 (the filing on sec.gov)
Citadel Advisors LLC84,419$6.0munder 0.1%Added+49,8312 Sep 2026 (the filing on sec.gov)
Arrowstreet Capital LP66,592$4.7munder 0.1%Newnew13 Aug 2026 (the filing on sec.gov)
Millennium Management LLC45,944$3.3munder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
AQR Capital Management LLC45,580$3.2munder 0.1%Trimmed-2,99214 Aug 2026 (the filing on sec.gov)
Acadian Asset Management LLC40,393$2.9munder 0.1%Trimmed-10,59513 Aug 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc27,185$1.9munder 0.1%Added+4,30114 Aug 2026 (the filing on sec.gov)
AllianceBernstein LP41,341$1.4munder 0.1%Trimmed-3,63914 Aug 2026 (the filing on sec.gov)
Caxton Associates LLP9,475$671kunder 0.1%Trimmed-76814 Aug 2026 (the filing on sec.gov)
Man Group PLC7,277$515kunder 0.1%Trimmed-11,50014 Aug 2026 (the filing on sec.gov)
Freestone Grove Partners LP7,003$496kunder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Two Sigma Investments LP5,600$396kunder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Bridgewater Associates LP4,807$340kunder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Neuberger Berman Group LLC4,296$304kunder 0.1%Newnew27 Oct 2026 (the filing on sec.gov)
Quantbot Technologies LP461$33kunder 0.1%Newnew12 Aug 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

Q1 2026 to Q2 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (10)

Exited (1)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
1 in Q2 2017 to 3 in Q2 2026

Tracked managers listing it, at least.

0123Q4 2013Q2 2016Q1 2017Q2 2017Q1 2023Q2 2023Q3 2023Q4 2023Q1 2024Q1 2026Q2 2026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
PDFS by quarter
QuarterHoldersReported valueBuyersSellers
Q4 20131$1.4mn.a.n.a.
Q2 20161$214kn.a.n.a.
Q1 20171$1.1mn.a.n.a.
Q2 20171$863kn.a.n.a.
Q1 20231$15mn.a.n.a.
Q2 20231$15mn.a.n.a.
Q3 20231$772kn.a.n.a.
Q4 20231$652k01
Q1 20241$664k01
Q1 20261$34m109
Q2 20263$91m158

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

PDFS and GOOGL →PDFS and AMZN →PDFS and MSFT →Choose a stock to compare with PDFS →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own PDFS, latest filings →Back to the 13F Explorer →