ARK Invest

One of the app's features lets you select ARK Invest ETFs in the Watchlist and aggregate their holdings to see how often each ticker appears across the selected funds. Repeated holdings make overlapping exposure visible: the more selected funds include a ticker, the greater its potential influence on the portfolio; gains in that holding may help, while declines may hurt, and actual impact also depends on each fund's position size. Another feature makes it faster and easier to find funds with stronger growth over different periods, higher dividend yields or distributions, greater Total Return (price performance plus dividends), and other key performance metrics. A single-file client-side tool that reads the generated ./api/ark static feed (ark-funds.com ETF pages and per-fund overview, NAV-history and performance JSON — official NAV returns, expenses, net assets and whole-life NAV/market-price history — plus the official daily holdings CSV files, with SEC EDGAR N-PORT-P and Yahoo Finance as fallbacks) into a searchable ETF/asset-class catalog with per-fund tabs, watchlist aggregation, ticker copy and CSV/TXT export — the same look, feel, columns and business logic as the sibling applications.

Using Bun

bunx degit daggerok/ARK#main ./12345 && cd $_
bunx serve . -p 1234
open http://0:1234

GitHub Pages serves the main branch; the application will be available at https://daggerok.github.io/ARK/ once the implementation branch is merged (deployment pending).

Updating the static ARK Invest data

Run the updater with Bun:

bun test
./scripts/update-data.ts

Run ./scripts/update-data.ts -h (or --help) to print every configuration variable with its default and usage examples.

Defaults live in scripts/update-data.config.json (every control as a string). Explicit environment variables override the file; an ARK_<KEY> alias (for example ARK_CONCURRENCY) wins over the plain <KEY> when both are set. The Update ARK Invest ETF data GitHub Actions workflow uses the same resolver: individual workflow_dispatch inputs are blank by default and inherit the file, the advanced input accepts a JSON object with any control, and the precedence is file < advanced JSON < nonblank individual inputs. GitHub allows at most 25 inputs, so SEC_UA, SKIP_ARK and VERBOSE are set through advanced (for example {"VERBOSE":"true"}). All supplied filters use AND logic.

Data sources

Block	Source
Catalog (the 14 ARK ETFs)	https://www.ark-funds.com/our-etfs/ (the official ETF overview page; ARKVX, an interval fund, is excluded)
Fund facts per fund	https://www.ark-funds.com/api/fund/overview/{ID} (the JSON behind each fund page, e.g. ARKK; the page ID is discovered from the page at run time)
Holdings per fund	https://assets.ark-funds.com/fund-documents/funds-etf-csv/{FUND}_HOLDINGS.csv (the official daily holdings CSV linked from each fund page; ARKY uses a structured-note layout)
Daily history	https://www.ark-funds.com/api/fund/nav-historical-change/{ID} (official NAV and market-price history)
Returns	https://www.ark-funds.com/api/fund/performance/{ID} (official month-end and quarter-end NAV returns)
Distributions	Yahoo Finance chart API dividend events (ARK publishes no dividend-history endpoint)
Fallback	SEC EDGAR N-PORT-P (ARK ETF Trust, CIK 0001579982; Ark 21Shares Bitcoin ETF, CIK 0001869699) + Yahoo Finance chart API as fallbacks

All issuer requests go directly to ark-funds.com with a short contact-bearing User-Agent (DaggerOk ARK static feed updater (admin@…)). The site's Cloudflare WAF answers HTTP 403 to any User-Agent that contains a URL (the crawler-style (+https://github.com/…)) and challenges browser User-Agents sent from a non-browser TLS stack, so the updater deliberately uses neither. Only if two consecutive direct requests are still denied does it fall back to the read-only r.jina.ai reader for the remaining issuer requests (one [ issuer ] notice; that reader is limited to roughly 20 requests per minute, so proxied requests are spaced 3 seconds apart across the whole run). A previously published fund page ID is reused when the overview endpoint confirms it still answers for the same ticker, which skips the heaviest page download on repeat runs; IDs are never hard-coded. Holdings CSVs, SEC EDGAR and Yahoo Finance are always fetched directly. A fund whose sources fail keeps its previously published data.

Each fund carries a derived metrics object that powers the catalog columns shared with the sibling sites:

• ytd / tr1y — official YTD and 1-year NAV returns → YTD Return, TR 1Y
• cagr3y / cagr5y / cagr10y — published annualized 3Y/5Y/10Y figures → CAGR 3Y/5Y/10Y
• tr3y / tr5y / tr10y — cumulative 3Y/5Y/10Y figures (1 + CAGR)^n - 1 → TR 3Y/5Y/10Y
• siAnn — since-inception annualized → SI Ann.
• dividendYield — indicated yield (latest Yahoo Finance distribution × inferred frequency ÷ market price) or trailing 12-month yield; — when no distributions are reported
• secYield — 30-day SEC yield when published on the fund page; — otherwise

Update controls

Environment variable	Default	Meaning
MAX_FETCHES	all	Batch size: with a positive value the updater continues after the committed cursor in api/ark/update-state.json; empty or 0 is a full pass — every fund is refreshed in one run.
REQUEST_SLEEP	1.5	Minimum delay in seconds between request starts within one worker, including retries, for every provider (ark-funds.com, Azure holdings, Yahoo Finance, SEC EDGAR). Only the last-resort r.jina.ai fallback is additionally limited to one request every 3 seconds across all workers.
CONCURRENCY	2	Number of independent fund workers. Each worker owns its request lane, so CONCURRENCY=15 starts 15 funds at once and total run time shrinks roughly in proportion.
AUM	:	Net Assets range. Each bound may be a USD amount or K/M/B/T, or one of nano, micro, small, mid, large.
TER	:	Expense ratio range in % (strict min:max).
DIVIDEND_YIELD	:	Dividend-yield percentage range.
SEC_YIELD	:	30-day SEC yield percentage range.
CATEGORY	all	Case-insensitive substring of the fund category, e.g. Thematic.
TICKERS	all	Space-, comma- or semicolon-separated ticker allowlist, e.g. ARKK ARKW ARKG ARKB.
PERFORMANCE_YTD / _1Y / _3Y / _5Y / _10Y	:	Official annualized NAV return ranges in %.
TOTAL_RETURN_YTD / _1Y / _3Y / _5Y / _10Y	:	Cumulative NAV total-return ranges in %.
HOLDINGS_PAGE_SIZE	250	Rows in each generated current-holdings JSON page.
HISTORY_PAGE_SIZE	1000	Rows in each generated daily-history JSON page.
MAX_RETRIES	2	Retries after the initial request. Only network errors (including the 90-second per-request timeout) and HTTP 408/425/429/5xx are retried with exponential backoff and Retry-After.
SEC_UA	declared UA	Override the SEC User-Agent. SEC policy requires automated tools to declare a contact.
EDGAR_FALLBACK	on	Set to 0/false to disable the SEC EDGAR N-PORT-P holdings fallback.
SKIP_ARK	off	Do not request ark-funds.com; keep the fixed catalog and previously published official data and only run the fallbacks.
SKIP_YAHOO	off	Skip Yahoo Finance history and distribution updates.
VERBOSE	off	Print per-request retry and fallback notices.

TICKERS combines with AUM, TER, yield and return filters using AND logic; it does not override them. Funds not selected for a successful update keep their prior published metadata and data files.

Examples

MAX_FETCHES=3 ./scripts/update-data.ts
CONCURRENCY=15 ./scripts/update-data.ts
TICKERS="ARKK ARKW ARKG ARKB" ./scripts/update-data.ts
AUM="1B:" TER=":0.75" ./scripts/update-data.ts
PERFORMANCE_1Y="15:" ./scripts/update-data.ts

TypeScript

The browser app is intentionally build-free: index.html carries the markup, styles and bootstrap, and app.tsx is TypeScript compiled in the browser with Babel standalone — no build step, no bundler, no tsconfig.json needed. Bun runs TypeScript out of the box.

Verification before every publish: bun install --frozen-lockfile, bun test, and git diff --check.

Brands table

Brand	Where to get the data
abrdn (Aberdeen)	aberdeeninvestments.com | aberdeen
Amplify	amplifyetfs.com | Amplify
ARK Invest	ark-funds.com | ARK
Capital Group	capitalgroup.com | Capital-Group
Fidelity	fidelity.com | Fidelity
First Trust	ftportfolios.com | First-Trust
Franklin Templeton	franklintempleton.com | Franklin
Global X	globalxetfs.com/explore | Global X
Goldman Sachs	am.gs.com | Goldman-Sachs
Invesco	invesco.com | Invesco
iShares	ishares.com | iShares
JPMorgan	am.jpmorgan.com | JPMorgan
NEOS	neosfunds.com | Neos
Northern Trust	etfs.ntam.northerntrust.com | Northern-Trust
ProShares	proshares.com | ProShares
Schwab	schwabassetmanagement.com | Schwab
SPDR	ssga.com | SPDR
VanEck	vaneck.com | VanEck
Vanguard	investor.vanguard.com | Vanguard
VictoryShares	vcm.com VictoryShares ETFs | VictoryShares
WisdomTree	wisdomtree.com | WisdomTree

Sibling applications

Application	Data provider	Repository
abrdn (Aberdeen)	Official Aberdeen gateway + SEC N-PORT holdings fallback + Yahoo history/dividends	aberdeen
Amplify	Amplify ETFs (Firestore data feed)	Amplify
ARK Invest	ark-funds.com fund pages + overview/NAV-history/performance JSON + official daily holdings CSV + SEC EDGAR N-PORT-P holdings fallback + Yahoo Finance distributions/history fallback	ARK
Capital Group	Official Capital Group fund data + SEC N-PORT holdings fallback + Yahoo history fallback	Capital-Group
Fidelity	SEC EDGAR N-PORT-P + Yahoo Finance	Fidelity
First Trust	ftportfolios.com official ETF list + fund summary, holdings, distribution and price-history export pages + SEC EDGAR N-PORT-P holdings fallback + Yahoo Finance history fallback	First-Trust
Franklin Templeton	franklintempleton.com ETF listings + product pages + SEC EDGAR N-PORT-P	Franklin
Global X	globalxetfs.com Next.js catalog and fund pages + dated full-holdings CSV	Global X
Goldman Sachs	am.gs.com fund finder + detail pages + SEC EDGAR N-PORT-P	Goldman-Sachs
Invesco	invesco.com CSV downloads + Yahoo Finance	Invesco
iShares	iShares (BlackRock) product workbooks	iShares
JPMorgan	am.jpmorgan.com fund explorer + product-data JSON	JPMorgan
NEOS	neosfunds.com lineup table + official fund pages + daily holdings CSV	Neos
Northern Trust	etfs.ntam.northerntrust.com funds list + per-fund CSV/JSON downloads	Northern-Trust
ProShares	proshares.com ETF finder + fund pages + official data host	ProShares
Schwab	schwabassetmanagement.com product pages + CSV exports	Schwab
SPDR	SSGA / State Street public feeds	SPDR
VanEck	vaneck.com ETF finder + product pages	VanEck
Vanguard	Vanguard product pages + SEC EDGAR N-PORT-P	Vanguard
VictoryShares	VCM VictoryShares catalog and product JSON + SEC EDGAR N-PORT-P holdings fallback + Yahoo Finance adjusted-market-price history	VictoryShares
WisdomTree	WisdomTree product table + SEC EDGAR N-PORT-P + Yahoo Finance	WisdomTree

License

MIT — same as all sibling ETF repositories.

ARK®, ARK Invest® and the fund names/tickers referenced here are trademarks of ARK Investment Management LLC. This is an independent, unofficial tool; it is not affiliated with, endorsed by, or sponsored by ARK Investment Management LLC or ARK ETF Trust. All data is reproduced from ARK Invest's own public fund pages and downloads, public SEC EDGAR filings and Yahoo Finance for research purposes. All other trademarks, including index names, are the property of their respective owners.