PDFS
PDF SOLUTIONS INCMarquee-fund ownership over time
This quarter's activity
New positions opened
None.
Current holders
Sorted by tenure (longest first)| Fund | First disclosed | Held | Entry price | Latest close | Return on entry |
|---|---|---|---|---|---|
| Citadel Advisors | Q3 2024(8Q snapshot) | 7Q | $32 | $44 | +37% |
| AQR Capital Management | Q3 2024(8Q snapshot) | 7Q | $32 | $44 | +37% |
“Return on entry” is the price-only move from the fund's first disclosure to today — it ignores any adds, trims, or dividends. A fund that built its position over multiple quarters has a true cost basis somewhere between entry price and latest close; this figure is the upper bound.
Past holders
Funds that exited at some point| Fund | Last entry | Exited | Entry → Exit | Return |
|---|---|---|---|---|
| Two Sigma Investments 3× in & out | Q4 2025 | Q2 2026 | → $45 | +78% |
| D.E. Shaw | Q3 2024 | Q2 2026 | → $45 | +41% |
| Renaissance Technologies | Q4 2024 | Q1 2026 | → $32 | +1% |
| Millennium Management | Q3 2024 | Q4 2025 | → $25 | -21% |
Insider activity
Form 4 — officers, directors, 10%+ ownersFiled within two business days of each transaction by anyone with material insider status at PDF SOLUTIONS INC. Pair with the holders table above as a sanity check: heavy insider buying alongside marquee-fund accumulation is the strongest accumulation signal; heavy insider selling alongside fund exits is the strongest distribution signal.
30d / 90d windows measured from Jan 5, 2026 — the most recent Form 4 on file — not from today.
- Form 40001437749-26-000381Jan 5, 2026
- Form 40001437749-26-000374Jan 5, 2026
- Form 40001437749-25-037538Dec 11, 2025
- Form 40001437749-25-024679Aug 4, 2025
- Form 40001437749-25-024672Aug 4, 2025
- Form 40001437749-25-022174Jul 3, 2025
- Form 40001437749-25-022122Jul 3, 2025
- Form 40001437749-25-022120Jul 3, 2025
- Form 40001437749-25-022003Jul 2, 2025
- Form 40001437749-25-021998Jul 2, 2025
- Form 40001437749-25-021992Jul 2, 2025
- Form 40001437749-25-021976Jul 2, 2025
- Form 40001437749-25-021972Jul 2, 2025
- Form 40001437749-25-021964Jul 2, 2025
- Form 40001415889-25-012951May 14, 2025
Fundamentals
XBRL · PDF SOLUTIONS INCAnnual figures sourced directly from PDF SOLUTIONS INC's 10-K / 10-Q filings via SEC EDGAR XBRL. Latest fiscal year and the year-over-year change, with up to ten years of history.
Recent SEC filings
10-K · 10-Q · 8-K · 13D/G · proxyThe most recent material filings for PDF SOLUTIONS INC — earnings, material events, ownership disclosures, proxy statements. Form 4 insider activity is shown in the panel above.
- 8-KMaterial eventMay 15, 2026
- 10-QFORM 10-QMay 7, 2026
- 8-KFORM 8-KMay 7, 2026
- DEF 14AFORM DEF 14AApr 29, 2026
- 8-KFORM 8-KApr 24, 2026
- 10-KFORM 10-KFeb 24, 2026
- 8-KFORM 8-KFeb 12, 2026
- 8-KFORM 8-KNov 13, 2025
- 10-QFORM 10-QNov 6, 2025
- 8-KFORM 8-KNov 6, 2025
- 10-QFORM 10-QAug 7, 2025
- 8-KFORM 8-KAug 7, 2025
- 8-KFORM 8-KJun 23, 2025
- 10-QQuarterly reportMay 8, 2025
- 8-KMaterial eventMay 8, 2025
Trade history
Every open→close lifecycle across tracked funds| Fund | Open date | Close date | Open price | Close price / current | Return |
|---|---|---|---|---|---|
| Two Sigma Investments | Q4 2025 | Q2 2026 | $25 | $45 | +78% |
| Two Sigma Investments | Q1 2025 | Q2 2025 | $23 | $20 | -11% |
| Renaissance Technologies | Q4 2024 | Q1 2026 | $32 | $32 | +1% |
| Citadel Advisors | Q3 2024 | open | $32 | $44 | +37% |
| Two Sigma Investments | Q3 2024 | Q4 2024 | $32 | $31 | -2% |
| D.E. Shaw | Q3 2024 | Q2 2026 | $32 | $45 | +41% |
| AQR Capital Management | Q3 2024 | open | $32 | $44 | +37% |
| Millennium Management | Q3 2024 | Q4 2025 | $32 | $25 | -21% |
- Covers only the 27 marquee funds tracked here, not the full institutional universe. A “0 holders” reading does not mean unowned.
- Heavy funds (Renaissance Technologies, Citadel Advisors, Soros Fund Management, Two Sigma Investments, D.E. Shaw, AQR Capital Management, Millennium Management, Point72 Asset Management) use 8-quarter snapshots, so their pre-2024 history is missing.
- “Current” reflects each fund's most recent 13F — filings lag the actual trade by up to 45 days; positions shown may have changed since.
- Cost = price at the entry filing date. Re-entered positions show the most recent open lot.
- Options, ADRs, and unmapped CUSIPs are excluded from the follower-backtest pipeline that produces these snapshots, so certain holding types won't appear here.