ARKX
equityARK Space & Defense Innovation ETF
Buy it with play money
Fills at the latest stored close and lands in your paper portfolio
Sign in to buy ARKX with $10,000 of play money and watch it from here.
Sign in to tradePrice, and when Congress traded it
Hollow marks where they traded, filled where the filing went public
Hover a marker to see who traded and what it was worth.
If you had bought it yourself
Paid at that day's close, held ever since. No member involved.
Working it out…
Short interest
Shares sold short, as brokers report them to FINRA twice a month
| Settlement date | Shares short | Change | Days to cover |
|---|---|---|---|
| Sep 30, 2026 | 124.32K | -18.9% | 0.3 |
| Sep 15, 2026 | 153.26K | -52.3% | 0.4 |
| Aug 31, 2026 | 321.05K | -54.7% | 0.7 |
| Aug 14, 2026 | 708.09K | -30.9% | 1.1 |
| Jul 31, 2026 | 1.02M | +31.6% | 1.4 |
| Jul 15, 2026 | 778.08K | +24.2% | 0.9 |
| Jun 30, 2026 | 626.61K | +16.1% | 0.3 |
| Jun 15, 2026 | 539.91K | -12.3% | 0.3 |
Largest fails to deliver, the last year
45 settlement days with at least $10,000 of shares sold and not delivered
| Settlement date | Shares | Value |
|---|---|---|
| Jan 23, 2026 | 512.57K | $17.4M |
| Feb 20, 2026 | 33.5K | $1.1M |
| Jun 4, 2026 | 25.73K | $922K |
| Aug 6, 2026 | 28.15K | $917.1K |
| Jul 16, 2026 | 25.99K | $820.6K |
Short interest is every broker's short position at the settlement date, reported to FINRA and published about a week and a half later; it does not say who is short. Days to cover is the short position over the average day's trading, and the share of the company is against the shares outstanding on its latest filing. A fail to deliver is the balance of shares sold and not delivered by settlement, from the SEC: it can be a short seller who never borrowed the stock, but is as often a late delivery that clears within days.
More on ARKX
Who traded it
Most active first
No disclosures
Every disclosure
0 in total, newest first
No disclosures
Follow ARK Space & Defense Innovation ETF (ARKX) by email
New trades in ARK Space & Defense Innovation ETF (ARKX) by members of Congress, insiders and funds, with the rest of the week's filings. One email a week, free.
Unsubscribe with one click from any email.