Take a look at the top companies that made headlines long before the bell rang.

AT&T (T) – AT&T rose 1.5% in premarket trading, after the company beat estimates by 9 cents with an adjusted quarterly profit of 87 cents per share. Revenue also came in above analyst forecasts, with AT&T seeing growth in demand for its phone and internet services as well as HBO and HBO Max.

Danaher (DHR) – The maker of medical and diagnostic equipment earned an adjusted $2.39 per share for the third quarter, 24 cents above estimates, with revenue also topping predictions. Danaher noted a substantial contribution from Covid-19 treatment and testing. The premarket saw shares remain flat.

Blackstone (BX) – The private equity firm stock gained 2.8% in premarket action, after earnings per share came in at $1.28, topping a consensus estimate of 91 cents. Blackstone was helped by strong investments, and many other factors.

Dow Inc. (DOW) – The chemical maker came in 19 cents above estimates with an adjusted third-quarter profit of $2.75 per share, with revenue also above estimates. Dow witnessed an improvement in performance for packaging and specialty plastics. The stock also rose 1.2% during premarket trading.

Quest Diagnostics (DGX) – The medical lab operator saw its shares jump 3.4% in the premarket following better-than-expected quarterly results. Quest received an adjusted $3.96 per Share, against a consensus estimate $2.88 per Share. The increased Covid testing helped Quest improve its results and gave it a better outlook for the year.

Crocs (CROX) – Crocs surged 11.1% in the premarket, following adjusted quarterly earnings of $2.47 per share compared to a $1.88 consensus estimate. Digital sales increased 69% to beat expectations. This shoemaker also beat revenue forecasts.

IBM (IBM) – IBM beat estimates by 2 cents with adjusted quarterly earnings of $2.52 per share, but revenue fell below analyst forecasts amid some weakness in the company’s cloud business and a pullback in client spending. Premarket trading saw IBM drop 5%.

CSX (CSX) – CSX reported quarterly earnings of 43 cents per share, 5 cents above estimates, with the railroad operator’s revenue exceeding estimates as well. A 3% increase in shipping volume drove the beat, which was 33% higher than its strong level last year. Premarket trading witnessed CSX shares rallying by 3.9%

Tenet Healthcare (THC) – Tenet earned an adjusted $1.99 per share for its latest quarter, well above the $1.02 consensus estimate, and the hospital operator also reported better than expected revenue as well as raising its full-year earnings forecast. Tenet saw an increase in admissions and a rise in revenue per patient as the key factors that boosted its results. Premarket trading saw a 4% increase in stock.

Unilever (UL) – Unilever gained 1.3% in premarket trading after the consumer products giant reported better than expected quarterly results. Hellman’s mayonnaise and Dove soap were made by the same company. However, it was able raise prices in order to compensate for higher input costs. It warned however that inflation is likely to increase in 2022.

Canadian National Railway (CNI) – The Wall Street JournalAccording to reports, Elliott Management, an activist investor in rail operators has acquired a substantial stake. TCI Fund Management is another activist investor and already holds a greater than 5% share in Canadian National. The premarket saw shares remain flat.