Tick-by-tick trades and L2 order-book depth for 27 IPOs & Corporate Actions series on Kalshi — When will OpenAI, Anthropic, Starlink, Stripe, Discord, Canva, Databricks, Anduril, Ramp, Rippling, Deel, Brex or Skims IPO; IPOs this year; company mergers and acquisitions; S&P 500 and DJIA additions and removals. 4,379 series-days covering March 2026 – September 2026; 10.3K trades · $265.5K turnover in the 30 days to 2026-09-02. Sold as day bundles from €1.
IPO timing markets for OpenAI, Anthropic, SpaceX/Starlink, Stripe, Databricks, Discord, Canva and more; mergers, acquisitions and index additions/removals.
Every series below is archived at full feed resolution — each contract file carries every trade print (price, size, side) and Level-2 order-book updates in one normalized, zstd-compressed schema. A series-day bundle holds all contracts of the series for one UTC day.
Ranked by USD turnover from our own daily statistics — the series a market maker or bot builder should start with.
| # | Series | Venue | Trades (30d) | Turnover (30d) | Days | |
|---|---|---|---|---|---|---|
| 1 | Anthropic IPO | Kalshi | 3,457 | $153.3K | 23 | Buy days |
| 2 | IPOs | Kalshi | 2,279 | $41.0K | 23 | Buy days |
| 3 | Company Merger | Kalshi | 2,405 | $37.1K | 23 | Buy days |
| 4 | When will OPENAI Announce IPO? | Kalshi | 754 | $12.0K | 23 | Buy days |
| 5 | companies acquired this year | Kalshi | 320 | $6.6K | 23 | Buy days |
| 6 | Companies added to SP500 | Kalshi | 401 | $6.1K | 23 | Buy days |
| 7 | When will Discord IPO | Kalshi | 151 | $2.8K | 23 | Buy days |
| 8 | Companies removed from SP500 | Kalshi | 80 | $2.1K | 23 | Buy days |
| 9 | Databricks IPO | Kalshi | 121 | $2.1K | 23 | Buy days |
| 10 | Canva IPO | Kalshi | 88 | $1.2K | 23 | Buy days |
Trades and USD turnover summed over every contract of the series, from the recorded tick data; 30 days to 2026-09-02. Series without statistics in the window are omitted.
From the live prediction-movers snapshot (contracts of this topic's series only, settled markets filtered). Intraday — not part of the archived dataset.
| Contract | Venue | Price 24h ago → now | Δ | 24h turnover |
|---|---|---|---|---|
| KXIPOANTHROPIC-DATE-26NOV01 | Kalshi | 0.89 → 0.74 | -0.15 | $13.1K |
Live contracts ranked by absolute 24-hour price change (contracts quote 0..1; settled or near-settled contracts excluded). Snapshot 2026-09-05 11:03 UTC. Full list in the prediction movers.
Largest archive first. Each series page lists its exact coverage, day count and recent days; day bundles are bought in the shop calendar.
| Series | Venue | Interval | Days | Coverage | Size | Price/day | |
|---|---|---|---|---|---|---|---|
| IPOs | Kalshi | event | 185 | March 2026 – September 2026 | 188 MB | €1 | Buy days |
| When will OPENAI Announce IPO? | Kalshi | event | 185 | March 2026 – September 2026 | 73.1 MB | €1 | Buy days |
| Anthropic IPO | Kalshi | event | 157 | April 2026 – September 2026 | 71.4 MB | €1 | Buy days |
| companies acquired this year | Kalshi | event | 109 | May 2026 – September 2026 | 44.8 MB | €1 | Buy days |
| Company Merger | Kalshi | event | 163 | March 2026 – September 2026 | 42.6 MB | €1 | Buy days |
| Companies added to SP500 | Kalshi | event | 185 | March 2026 – September 2026 | 35.0 MB | €1 | Buy days |
| When will Discord IPO | Kalshi | event | 185 | March 2026 – September 2026 | 30.6 MB | €1 | Buy days |
| When will starlink IPO | Kalshi | event | 185 | March 2026 – September 2026 | 24.8 MB | €1 | Buy days |
| When will anduril IPO | Kalshi | event | 185 | March 2026 – September 2026 | 23.6 MB | €1 | Buy days |
| When will Stripe Announce IPO? | Kalshi | event | 185 | March 2026 – September 2026 | 16.9 MB | €1 | Buy days |
| When will deel IPO | Kalshi | event | 185 | March 2026 – September 2026 | 15.5 MB | €1 | Buy days |
| When will Fannie Mae IPO? | Kalshi | event | 185 | March 2026 – September 2026 | 14.5 MB | €1 | Buy days |
| When Will Glean IPO | Kalshi | event | 185 | March 2026 – September 2026 | 13.8 MB | €1 | Buy days |
| When will beast indsutries ipo | Kalshi | event | 185 | March 2026 – September 2026 | 13.7 MB | €1 | Buy days |
| When will Ramp IPO | Kalshi | event | 185 | March 2026 – September 2026 | 13.7 MB | €1 | Buy days |
| When will Rippling IPO | Kalshi | event | 185 | March 2026 – September 2026 | 12.7 MB | €1 | Buy days |
| When will Appsflyer IPO | Kalshi | event | 185 | March 2026 – September 2026 | 12.5 MB | €1 | Buy days |
| When will Oli Pop Ipo? | Kalshi | event | 185 | March 2026 – September 2026 | 11.9 MB | €1 | Buy days |
| When will Freddie Mac IPO? | Kalshi | event | 185 | March 2026 – September 2026 | 10.8 MB | €1 | Buy days |
| Databricks IPO | Kalshi | event | 95 | June 2026 – September 2026 | 10.6 MB | €1 | Buy days |
| Canva IPO | Kalshi | event | 95 | June 2026 – September 2026 | 10.4 MB | €1 | Buy days |
| Waymo IPO | Kalshi | event | 95 | June 2026 – September 2026 | 10.3 MB | €1 | Buy days |
| Skims IPO | Kalshi | event | 95 | June 2026 – September 2026 | 9.75 MB | €1 | Buy days |
| When will Cluely IPO | Kalshi | event | 185 | March 2026 – September 2026 | 9.66 MB | €1 | Buy days |
| When will Brex IPo | Kalshi | event | 185 | March 2026 – September 2026 | 9.22 MB | €1 | Buy days |
| Companies removed from SP500 | Kalshi | event | 168 | March 2026 – September 2026 | 7.97 MB | €1 | Buy days |
| Companies removed from DJIA | Kalshi | event | 72 | June 2026 – September 2026 | 5.89 MB | €1 | Buy days |
Yes — per-company IPO-timing series (OpenAI, Anthropic, Starlink, Stripe, Databricks, Discord, Canva, Anduril, Ramp, Rippling, Deel, Brex, Skims, Glean, Cluely, Olipop, Whoop, Oura, AppsFlyer, Beast Industries, Fannie Mae, Freddie Mac, Waymo) plus IPO counts, acquisitions announced, mergers and index-membership changes.
One purchase covers every contract of a series for one UTC day — tick-by-tick trades plus Level-2 order-book updates per contract — typically €1 per series-day.
Coverage runs March 2026 – September 2026 — 4,379 series-days across 27 series on Kalshi. Each series page lists its exact span.
Yes — trades export as gzipped CSV or Parquet at no extra cost, with integer microsecond UTC timestamps that load straight into pandas, polars or DuckDB. Kalshi records full order-book depth without a separate BBO stream, so book data ships in the native tick file — the free reader script converts it locally. See the formats overview.
Typically €1 per series-day bundle — every contract of the series for that UTC day, with invoice on checkout. Pick days in the shop calendar.