ARK Investment Management · Cathie Wood
Latest 13F holdings with ERM3 risk decomposition — how much of the portfolio's return is market beta versus genuine stock-picking, and where the residual risk concentrates.
- Reported AUM
- $14.2B
- Holdings
- 140
- Top-10 weight
- 43%
- As of
- 2026-06-30
- Filed
- 2026-08-14
Return attribution — beta or stock-picking?
Sum of monthly ERM3 attribution over the trailing 12 months (2025-07-31 → 2026-06-30), modeled subset of holdings. Stock selection (residual return) detracted about 49% of the gross return over this window — the factor legs carried the book.
Gross
+25.3%
Market
+35.3%
Sector
+3.9%
Subsector
-0.1%
Stock selection
-12.5%
Top holdings
140 reported positions; top 15 shown. “Stock-specific” is the share of each position's variance not explained by market, sector, or subsector factors.
| # | Holding | Weight | Value | Stock-specific |
|---|---|---|---|---|
| 1 | TSLATesla, Inc. | 8.2% | $1.2B | 47% |
| 2 | AMDAdvanced Micro Devices, Inc. | 5.8% | $823M | 46% |
| 3 | SPCXSpace Exploration Technologies Corp. Class A Common Stock | 5.4% | $765M | 105% |
| 4 | TEMTempus AI, Inc. Class A | 4.1% | $581M | 77% |
| 5 | HOODRobinhood Markets, Inc. Class A | 3.7% | $525M | 51% |
| 6 | CRSPCRISPR Therapeutics AG | 3.6% | $516M | 60% |
| 7 | SHOPShopify, Inc. Class A | 3.3% | $475M | 63% |
| 8 | TWSTTwist Bioscience Corp. | 3.3% | $468M | 71% |
| 9 | TXG10x Genomics Inc Class A | 2.7% | $384M | 84% |
| 10 | AMZNAmazon.com, Inc. | 2.7% | $379M | 46% |
| 11 | PLTRPalantir Technologies Inc. Class A | 2.6% | $375M | 59% |
| 12 | GOOGAlphabet Inc. Class C | 2.6% | $369M | 60% |
| 13 | COINCoinbase Global, Inc. Class A | 2.6% | $367M | 62% |
| 14 | RBLXRoblox Corp. Class A | 2.5% | $352M | 90% |
| 15 | BEAMBeam Therapeutics, Inc. | 2.5% | $351M | 61% |
99% of reported AUM is in the ERM3 model universe; attribution and risk shares cover that subset. Source: SEC Form 13F-HR, filed 2026-08-14.
How concentrated is this book?
Quarter-end concentration across 39 filings from 2016-12-31 to 2026-06-30, with the latest filing set against this manager's own median.
- Effective N
- 34.6
- median 28.8
- Top 5 weight
- —
- no median
- Top 10 weight
- 42.7%
- median 49.8%
- Weight HHI
- —
- no median
Effective N is inverse-Herfindahl breadth, not a holding count: it falls well below the number of positions when one name dominates, which is the case worth seeing. This book held 140 positions at 2026-06-30.
Interrogate this portfolio
Ask the AI risk analyst what changed last quarter, where the concentration risk sits, or how your portfolio overlaps with Cathie Wood's.