In short. Report what the sponsor can act on: verified attendance against RSVPs, who was in the room by seniority and sector, how many conversations the event produced, and how many attendees returned from last time. Leave out impressions, reach and anything you cannot evidence, because an unverifiable number invites the sponsor to doubt the ones that are real.
Sponsorship renewal is decided by whether the person who signed the cheque can justify it internally. They rarely say that out loud, and they almost never tell you what would have helped, so most post-event reports are written to a format inherited from somebody who left in 2019.
The format is usually: a headline attendance figure, a photograph of a full room, three quotes, and a logo placement count. None of that survives contact with a finance director.
What to report
1. Verified attendance against RSVPs. Two numbers, not one. 230 registered and 179 attended is a more credible report than 179 attended, because it shows you are counting rather than estimating, and because the gap is a real operational fact a sponsor can plan around. Verified means checked in, not counted at the door by someone with a clicker.
2. Who was in the room. Seniority and sector, in bands. A sponsor selling to operations directors in manufacturing does not care that 179 people came. They care that 41 of them were operations directors and 60 were in manufacturing. This is the single most valuable thing in a sponsor report and the most commonly left out.
3. How many of them were new to your events. First-timers against returning. A sponsor buying reach wants the first number. A sponsor building relationships wants the second. Giving both lets them decide which they bought.
4. Conversations, not footfall. How many introductions or conversations the event actually produced, however you can evidence it. If you run a platform that records approaches and acceptances, report both, because the acceptance rate is the part that distinguishes a room that worked from a room where everyone was pitched at.
5. What happened in the week after. Networking value is created in the fortnight either side of an event, and almost nobody reports the second week. Connections made after the event is the number that most clearly separates a good evening from a pleasant one.
6. Returning attendance across your programme. How many of this event’s attendees were at your last one. For a sponsor committing to a series rather than a night, this is the metric that justifies the series. It is also the one most event platforms cannot produce, because a tool licensed for a single event has no memory of the previous one.
7. The things that went wrong. One short, unspun paragraph. The room was too hot, the 7pm slot killed attendance, the format did not suit the numbers. Sponsors already know, because they were there. Writing it down is what makes the rest of the document credible.
What to leave out
Impressions and reach. A social post seen by 4,000 people is not attributable to the sponsorship and everybody in the meeting knows it. Including it signals that the real numbers were not strong enough to stand alone.
Logo placement counts. “Your logo appeared on 14 touchpoints” is a description of what you did, not of what it produced. It belongs in the delivery checklist, not the outcome report.
Satisfaction scores from a survey with a 9% response rate. A 4.6 out of 5 from 16 respondents out of 179 attendees tells the reader about the 16 people who were pleased enough to answer. If you report it, report the response rate next to it, and expect it to be discounted.
How to say you do not know
You will not have all seven. Most organisers cannot evidence conversations at all, and almost nobody can produce returning attendance across a programme without tooling that persists between events.
Say so directly. “We cannot currently evidence conversations produced. We are putting that in place for the next one and will report it.” That costs you far less than it feels like it does, and it costs dramatically less than a number the sponsor can see through.
The failure mode is the opposite: padding the gap with impressions and satisfaction scores. A reader who spots one unverifiable figure starts discounting the verifiable ones too, and you lose the credit for the work you actually did.
The one-page version
Sponsors do not read fourteen pages. Put this on one side of A4 and attach the detail behind it:
- Registered, attended, attendance rate
- Audience by seniority and by sector, in bands
- First-time against returning attendees
- Conversations produced, and the acceptance rate if you have it
- Connections made in the week afterwards
- Returning attendance from your previous event
- One paragraph on what you are changing next time
If you can fill six of those seven, you are reporting better than most of the market.
Where the data comes from
Most of this is collectable without special tooling if you are organised: registration and check-in give you the first three, and a short follow-up to attendees gives you a usable, caveated version of the fourth.
Conversations and returning attendance are the two that genuinely need a system that persists between your events. On The Gantry those are aggregate and free to the organiser: verified check-in, approaches sent and accepted, relationships formed, first-time against returning, and unique reach across your programme. What it will never give you is who spoke to whom, message contents or an exportable contact list, which is the trade that makes delegates willing to be visible in the first place. What organisers can and cannot see sets out exactly where that line is.
Related: how to measure whether a networking event worked, and running a networking event people return to.