Cathie Wood cut $ARKB by $40.0M — ARK weekly trades, Sep 14-18, 2026
YBy Yona · Sep 19, 2026 · Weekly recap
ARK's 45 trades this week, a $40.0M single-name cut in $ARKB, a 5th-straight-week trim in $AMD.
▪️ 45 trades across 25 tickers, 8 ARK ETFs
▪️ Legacy SaaS + streaming trimmed -$40.0M; crypto + AI compute + space accumulated
▪️ Sep 14 was the sharpest day — same-day directional cluster of 9 tickers
Biggest $ cut
$ARKB -$40.0M
-1.53M sh
Biggest $ add
$CRWV $14.2M
+6.5%, 174K sh
Longest streak
$AMD 5 weeks
Weekly $ flow by boardred = cut · green = add
Space book
-$4M
Crypto book
-$20M
AI compute layer
-$16M
+$14M
Legacy SaaS + streaming
-$6M
CDN + platform megacaps
-$5M
+$7M
Biotech
-$34M
+$8M
Autos + industrial cyclicals
-$3M
Other
-$60M
+$15M
Three continuing themes this week
1
$AMD — 5-week streak (weekly trims)
2
$TWST — 6-week streak (weekly trims)
3
$SLMT — 9-week streak (weekly trims)
Section 1 · Space book
Iridium Communications trimmed, no new satellite positions added.
IRDM-52.2%
Iridium Communications Inc.-$3.8M
Section 2 · Crypto book
Crypto exchanges and market infrastructure trimmed while holdings persist.
CRCL-2.6%
Circle Internet Group, Inc-$12.9M
COIN-1.6%
Coinbase Global Inc-$6.4M
BLSH-0.3%
Bullish-$642.0K
Section 3 · AI compute layer
AI cloud infrastructure favoured over chip and analytics names.
CRWV+6.5%
CoreWeave, Inc.$14.2M
AMD-2.8%
Advanced Micro Devices, Inc.-$10.6M
5wk trimPLTR-1.6%
Palantir Technologies Inc.-$5.8M
Section 4 · Legacy SaaS + streaming
Shopify trimmed as e-commerce platform exposure reduced.
SHOP-2.0%
Shopify Inc.-$6.4M
Section 5 · CDN + platform megacaps
Social media favoured over e-commerce and search advertising.
META+3.4%
Meta Platforms, Inc.$7.1M
AMZN-1.4%
Amazon.com Inc-$5.1M
GOOGL-1.2%
Alphabet Inc.-$102.7K
Section 6 · Biotech
Liquid biopsy favored over genomic tools and diagnostics.
TXG-5.5%
10x Genomics, Inc.-$22.1M
GH+9.6%
Guardant Health, Inc.$7.7M
TEM-1.1%
Tempus AI, Inc.-$5.1M
NTRA-1.7%
Natera, Inc.-$2.6M
TWST-0.5%
Twist Bioscience Corporation-$1.9M
6wk trimSection 7 · Autos + industrial cyclicals
Teledyne trimmed as industrial cyclicals see no new additions.
TDY-29.1%
Teledyne Technologies Inc-$3.3M
Section 8 · Other
Biotech and defense robotics favored over bitcoin vehicles and gene sequencing.
ARKBnew
ARK 21Shares Bitcoin ETF-$40.0M
GOOG-4.5%
Alphabet Inc.-$12.8M
IONS+28.7%
Ionis Pharmaceuticals, Inc.$9.0M
AVAV+6.9%
AeroVironment, Inc.$5.6M
BMNR-2.0%
BitMine Immersion Technologies, Inc.-$3.9M
Largest % add
$IONS +28.7%
Largest % cut
$IRDM -52.2%
Largest abs add
$CRWV 174K sh
Largest abs cut
$ARKB -1.53M sh
Largest $ add
$CRWV $14.2M
Largest $ cut
$ARKB -$40.0M
Y
Yona · AiSmartMoney research
Tracks 60+ smart-money investors' AI positions. Weekly ARK recaps compiled from arkfunds.io official daily trade files. About →
Methodology · Data from arkfunds.io official daily trade files (Mon–Fri). Dollar values derived from ARK's own share-price at trade date, with yfinance fallback for newly-opened positions. Board classification is a curated grouping.
Disclaimer · Public-market data recap only. Not investment advice.
Disclaimer · Public-market data recap only. Not investment advice.