What are Strategy’s products? From STRK to STRC explained

I’m missing the full article text — I only have the headline and a one-line summary. To rewrite it accurately and keep every data point intact, please paste the full content or share the key terms for each instrument (e.g., what STRK, STRC, STRD represent, dividend/coupon, convert price, seniority, use of proceeds, issuance dates, and any trading tickers).

If you’d prefer, I can draft a fresh, SEO-friendly explainer on Strategy’s capital stack and why the firm uses common equity, preferreds, and convertibles to scale its bitcoin exposure — but that won’t be a true rewrite without the original details.