Zweig-DiMenna Associates LLC CDNA — CAREDX INC

Ownership history in Zweig-DiMenna Associates LLC  ·  15 quarters on record

AI Ownership Summary

Zweig-DiMenna Associates LLC reported CAREDX INC (CDNA) in 15 quarterly 13F filings from 2025 Q2 through 2026 Q3. Peak portfolio weight reached 1.95% in 2026 Q3. The latest visible filing shows CDNA at 1.95% 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 CDNA ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Zweig-DiMenna Associates LLC's position in CAREDX 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 Q3

CDNA was reported at 1.95% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
1.95% in 2026 Q3

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

Time in book
Holding Window
2025 Q2 to 2026 Q3

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.

CDNA stock page Zweig-DiMenna Associates LLC fund profile Zweig-DiMenna Associates LLC full holdings
How Zweig-DiMenna Associates LLC held CDNA — position size vs. price
% of Fund (quarterly)    CDNA price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 6 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q3 ADDED — — — 389,812 +1,000 +0.3% 1.95% $25.3M 2026-11-06 $78.56
2026 Q2 REDUCED — — — 388,812 -1,443 -0.4% 1.01% $11.1M 2026-08-13 $47.38
2026 Q1 REDUCED 42.5% +68.7% ❌ 390,255 -288,745 -42.5% 0.94% $6.8M 2026-05-05 $20.70
2025 Q4 ADDED — — — 679,000 +104,000 +18.1% 0.79% $12.8M 2026-02-10 $20.57
2025 Q3 ADDED — — — 575,000 +348,400 +153.8% 0.58% $8.4M 2025-11-07 $15.62
2025 Q2 REDUCED 24.8% -23.9% ✅ 226,600 -74,874 -24.8% 0.42% $4.4M 2025-08-05 $12.85
9 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding CDNA

As of 2026 Q3 — sorted by position size

GAGNON SECURITIES LLC 3Y 7Y 12.11% Gagnon Advisors, LLC 3Y 7Y 10.24% Lisanti Capital Growth, LLC 3Y 7Y 2.27% Capricorn Fund Managers Ltd 3Y 0.38% THOMPSON DAVIS & CO., INC. 3Y 7Y 0.32% PERKINS CAPITAL MANAGEMENT INC 3Y 7Y 0.28% BURNEY CO/ 3Y 7Y 0.24% Bradley & Co. Private Wealth Management, LLC 3Y 0.24% ARS Investment Partners, LLC 3Y 7Y 0.21% Balance Wealth Partners LLC 0.13%

FAQ About Zweig-DiMenna Associates LLC and CDNA

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

How long has Zweig-DiMenna Associates LLC reported owning CDNA?

Zweig-DiMenna Associates LLC reported CDNA across 6 quarterly 13F filings, from 2025 Q2 through 2026 Q3.

What was the largest reported CDNA position in Zweig-DiMenna Associates LLC's portfolio?

The largest reported portfolio weight for CDNA was 1.95% in 2026 Q3.

What is the latest reported CDNA position on this page?

The most recent filing on this page is 2026 Q3, when Zweig-DiMenna Associates LLC reported 389,812 shares, equal to 1.95% of portfolio, with an estimated market value of $25.3M.

What does the chart on this CDNA ownership page compare?

The chart compares Zweig-DiMenna Associates LLC's quarterly CDNA 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 Zweig-DiMenna Associates LLC time their CDNA position?

Based on 13F filing dates vs. subsequent CDNA price moves, Zweig-DiMenna Associates LLC correctly timed 5 out of 14 reported position changes (36%). The annualised alpha on CDNA relative to SPY over the holding period was +38.4%.

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