There's an [example][1] of this in the [lwc-recipes][2] repository published by salesforce.com.

Your JS should look like:

    import { wire, LightningElement } from 'lwc';
    import getAllCompanys from '@salesforce/apex/StockMarketSharesWrapper.getAllCompanys';

    export default class MyLwcComponent extends LightningElement {
      @wire(getAllCompanys, {}) companys;
      columns = [{ label: 'Name', fieldName: 'Name' }, { label: 'Ticker', fieldName: 'Ticker' }]
    }

And your HTML can look like:

    <template>
      <lightning-datatable data={companys} columns={columns} key-field="Name">
      </lightning-datatable>
    </template>

See also the [lightning-datatable][3] documentation.

Edit: Your Apex is reusing the same variable, despite creating new wrappers; this is why most of your data would be blank.

        Wrapper w = new Wrapper();
        w.Ticker = 'U';
        w.Name = 'Unity Software Inc';
        Wrapper w1 = new Wrapper();
        w1.Ticker = 'UAL';
        w1.Name = 'United Airlines Holdings, Inc.' ;
        Wrapper w2 = new Wrapper();
        w2.Ticker ='DAOOU' ;
        w2.Name = 'Crypto 1 Acquisition Corp Unit';
        Wrapper w3 = new Wrapper();
        w3.Ticker = 'GLLIU';
        w3.Name ='Globalink Investment Inc. Unit' ;




  [1]: https://github.com/trailheadapps/lwc-recipes/tree/main/force-app/main/default/lwc/contactList
  [2]: https://github.com/trailheadapps/lwc-recipes/
  [3]: https://developer.salesforce.com/docs/component-library/bundle/lightning-datatable/