CenterBook Partners LP PDFS — PDF SOLUTIONS INC

Ownership history in CenterBook Partners LP  ·  16 quarters on record

AI Ownership Summary

CenterBook Partners LP reported PDF SOLUTIONS INC (PDFS) in 16 quarterly 13F filings from 2024 Q1 through 2026 Q1. Peak portfolio weight reached 0.23% in 2025 Q3. The latest visible filing shows PDFS at 0.03% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings. Older history is available after unlock; the visible window still shows the most recent pattern.

What this PDFS ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was CenterBook Partners LP's position in PDF SOLUTIONS INC, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2026 Q1

PDFS was reported at 0.03% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.23% in 2025 Q3

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2024 Q1 to 2026 Q1

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

PDFS stock page CenterBook Partners LP fund profile CenterBook Partners LP full holdings
How CenterBook Partners LP held PDFS — position size vs. price
% of Fund (quarterly)    PDFS price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 9 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 REDUCED — — — 17,405 -17,071 -49.5% 0.03% $569K 2026-05-05 $46.35
2025 Q4 REDUCED 80.5% +14.7% ❌ 34,476 -141,987 -80.5% 0.05% $984K 2026-02-11 $32.52
2025 Q3 ADDED — — — 176,463 +17,647 +11.1% 0.23% $4.6M 2025-11-07 $26.45
2025 Q2 ADDED — — — 158,816 +41,905 +35.8% 0.19% $3.4M 2025-08-12 $20.30
2025 Q1 ADDED — — — 116,911 +89,718 +329.9% 0.14% $2.2M 2025-05-09 $18.41
2024 Q4 REDUCED 55.0% -29.4% ✅ 27,193 -33,206 -55.0% 0.04% $736K 2025-02-13 $28.08
2024 Q3 ADDED — — — 60,399 +24,614 +68.8% 0.12% $1.9M 2024-11-14 $31.09
2024 Q2 ADDED — — — 35,785 +8,826 +32.7% 0.08% $1.3M 2024-08-12 $30.95
2024 Q1 ADDED — — — 26,959 +13,530 +100.8% 0.06% $908K 2024-05-10 $34.29
7 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding PDFS

As of 2026 Q1 — sorted by position size

Silverberg Bernstein Capital Management LLC 8.52% EMERALD MUTUAL FUND ADVISERS TRUST 3Y 7Y 0.94% EMERALD ADVISERS, LLC 3Y 7Y 0.89% Significant Wealth Partners LLC 0.36% Yorktown Management & Research Co Inc 3Y 7Y 0.26% Clarus Group, Inc. 3Y 0.12% WASATCH ADVISORS LP 3Y 7Y 0.11% CVA Family Office, LLC 3Y 0.06% Inspire Investing, LLC 3Y 7Y 0.04% Central Pacific Bank - Trust Division 0.04%

FAQ About CenterBook Partners LP and PDFS

These are the practical questions this page is built to answer before you even open the full history table.

How long has CenterBook Partners LP reported owning PDFS?

CenterBook Partners LP reported PDFS across 9 quarterly 13F filings, from 2024 Q1 through 2026 Q1.

What was the largest reported PDFS position in CenterBook Partners LP's portfolio?

The largest reported portfolio weight for PDFS was 0.23% in 2025 Q3.

What is the latest reported PDFS position on this page?

The most recent filing on this page is 2026 Q1, when CenterBook Partners LP reported 17,405 shares, equal to 0.03% of portfolio, with an estimated market value of $569K.

What does the chart on this PDFS ownership page compare?

The chart compares CenterBook Partners LP's quarterly PDFS portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

How well did CenterBook Partners LP time their PDFS position?

Based on 13F filing dates vs. subsequent PDFS price moves, CenterBook Partners LP correctly timed 9 out of 15 reported position changes (60%). The annualised alpha on PDFS relative to SPY over the holding period was -0.1%.

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