A home page and a hunch is not preparation
Most business development calls are prepared the same way: the company's home page, its LinkedIn page and whatever the recruiter remembers. That produces a caller who opens with "so, tell me about the business", which tells the buyer nobody looked.
The answer is not more research. It is the right seven facts, each with its source, on one page. What the company does. Whether it is growing. What it has announced. What it is hiring for today. What it runs. Who leads the team you would recruit into. And three things worth saying that come out of those facts.
What makes the page usable is the sourcing rule. An invented fact on a call costs more than a gap, so every line says where it came from and anything the agent could not find is written as not found.
What you get back
One page per company, in a fixed order: what they do, size and direction, funding and news with dates, the open roles with the ones in your discipline marked, the technology where it matters, the leader of your function with a LinkedIn profile, and the three points worth raising. At the foot, the list of gaps and the list of sources.
Nothing is sent and nothing is written to your CRM.
Variations worth knowing
Brief the person as well. If you know who you are speaking to, their recent public LinkedIn posts can be read for what they have been saying about hiring, the team or the market. It is one extra paid lookup per person.
Keep watching after the call. If the conversation goes nowhere today, know when a target account opens a role in your discipline keeps an eye on the account for you.
Make it a routine. If you would rather be handed a short list of accounts worth ringing each day, see start every morning with a short list of companies worth calling.
Where this goes wrong
The wrong company. Names collide, and a brief about the wrong business is worse than none. The confirmation step is first for that reason.
Thin or lagging data. Headcount in a database trails reality, and a news search only finds what was published. Small private companies leave more gaps than large ones.
A careers page is not the whole picture. Roles handled by an agency or never advertised do not appear. An empty careers page is not proof that nobody is hiring.
Reading too much into a signal. A funding round is not a hiring plan and one news item is not a strategy. The three points are prompts for a conversation, not conclusions to present.