Public research preview
Rick Larsen, Representative disclosure: Costco Wholesale Corporation - Common Stock (COST)
Disclosed a buy transaction in Costco Wholesale Corporation - Common Stock (COST). Use this page to inspect source evidence, confidence scores, filing delay, and post-disclosure price movement before deciding whether to research the signal further.
This public page is for public-disclosure research only. It is not investment advice and does not place orders. Verify the official source before relying on any signal.
Evidence passport
Official-source context and parser confidence before any simulation or alert decision.
- Source
- House STOCK Act disclosures
- Published
- 26 May 2023, 00.00
- Parser confidence
- 94%
- Instrument mapping
- 95%
- Filing delay
- 786 days
Timeline
Transaction date
31 Mar 2021
Public disclosure
26 May 2023
Now
Tracked today
Filing delay: 786 days
Price movement
Complete coverage
- Provider
- Yahoo Finance daily close
- Fetched
- 10 Jun 2026
Most of the move happened before this disclosure became public: the stock peaked +73.7% above the transaction-date close and has since retraced -15.8% from that peak. Buying now is a pullback entry on the disclosed position, not a fresh breakout.
Stock path
COST from pre-transaction context through latest close.
Bought
31 Mar 2021 · 333,227 USD · Not public yet
System decision
Would have bought · Discount entry — The strategy would have bought this signal, but the entry window has closed. Simulated entry on 26 May 2023 at 487,346 USD. Since entry: +100.0%. Planned exit on 27 Jun 2023 after 20 trading days.
- Not public yet
- Buy window
- Window closed
- System buy
- Planned exit
- Observed transaction close
- 333,227
- Observed disclosure close
- 487,346
- Observed latest close
- 974,75
- Pre-disclosure move
- +46.3%
- Post-disclosure move
- +100.0%
- Market-adjusted move
- +100.0%
- Pre-disclosure peak run-up
- +73.7%
- Retrace from peak
- -15.8%
Why Copy Window is Probably too late
Supporting factors
- Parsed buy disclosure for ordinary shares from House STOCK Act disclosures.
- Reported amount is $1,001 - $15,000.
- Post-disclosure move is calculated from Yahoo Finance daily close daily closes.
Cautions
- Yahoo Finance daily close coverage is end-of-day and should be verified against the official price source.
- Review the original source document before making any investment decision.
Source document
House STOCK Act disclosures, published 26 May 2023, 00.00
- Parser confidence
- 94%
- Instrument mapping
- 95%