Cathie Wood trades · 20 Oct 2026

Cathie Wood takes a first bite of Iambic Therapeutics Inc — $20.5M

ARKG opened the position from scratch. The rest of the day's trades, plus ARK's scorecard against the S&P 500.

By ETFpeek Research20 Oct 2026Data: ARK daily holdings files

Cathie Wood takes a first bite of Iambic Therapeutics Inc — $20.5M

Generated from ARK's own holdings data.

ARKG bought an estimated $20.5M of Iambic Therapeutics Inc (IAM) on 20 Oct 2026. Yesterday the position was zero.

IAM bought

$20.5M

ARKG

Days in a row

of buying

ARKG this year

+63.5%

S&P 500 +13.3%

ARKG over 5 years

-37.6%

S&P 500 +81.9%

This isn't a one-off. Across 1 trades in 30 days, ARK has bought a net $20.5M of the stock.

Everything ARK did on 20 Oct 2026

ARK made 8 real moves that day, once money flowing in and out of the funds is stripped out:

Stock	Funds	Est. value
IAM Iambic Therapeutics IncNew position	ARKG	+$20.5M
CRWV CoreWeave Inc	ARKK	+$8.9M
PSNL Personalis IncSold 10 days running	ARKG	−$4.5M
PLTR Palantir Technologies Inc	ARKK	−$3.1M
SHOP Shopify Inc	ARKK	−$3.1M
NTLA Intellia Therapeutics Inc	ARKG and ARKK	+$1.4M

The bigger picture: ARK's last 30 days

Zoom out to 30 days and ARK's largest net purchases are Nvidia Corp ($81.0M), CoreWeave Inc ($74.9M), Rocket Lab ($51.6M). On the other side, it has been cutting Advanced Micro Devices ($126.3M), Personalis Inc ($83.5M), 10X Genomics Inc ($76.2M).

Is it working?

So far this year ARKG is winning — +63.5% against the S&P 500's +13.3%.

ARKG has lagged the index by 9 points over the past month (-8.3% vs +0.6%). Most of the damage came from Tempus AI Inc (-20%, 9% of the fund), Genedx Holdings Corp (-37%, 3% of the fund), Twist Bioscience Corp (-10%, 9% of the fund).

Over the past year the gap is wider: ARKG returned +52.8% against +16.6% for the S&P 500, 36 points apart.

Over five years the gap is 119 points. ARKG is 58% below its all-time high from Jan 2021, having fallen as much as 84% at its worst in Apr 2025.

To date	1 month	YTD	1 year	5 years
ARKG	-8.3%	+63.5%	+52.8%	-37.6%
S&P 500 (SPY)	+0.6%	+13.3%	+16.6%	+81.9%
Nasdaq-100 (QQQ)	-0.3%	+17.2%	+19.4%	+96.9%

Track every Cathie Wood trade →Today's buys and sells, ARK vs the market, and how the six ARK funds compare. Updated every market day.

IAM in every ETF ARKG holdings

How we work this out

ARK publishes every fund's full holdings each day. We compare each day with the one before. When money flows into a fund, ARK buys more of every stock by the same percentage, so we strip that out and count only the moves beyond it as real decisions. Dollar values are estimates: shares traded × that day's price from ARK's own file.

ETFpeek is an independent research tool and is not affiliated with ARK Invest or Cathie Wood. Figures are estimates from public fund data, shown for information only — not financial advice. Past performance does not indicate future results.