Event portfolio construction beyond a list of shows you happen to own

Most groups I have worked with can tell you their eleven shows in running order and roughly what each one makes. Ask which of those eleven sit in sectors that are growing and the room goes quiet, because the answer has never been written down anywhere.

Event portfolio construction starts by putting each show somewhere on a page relative to the others, using two numbers you can recompute next year. Without that, the portfolio is a list in the order the shows were bought, and every capital conversation turns into whoever argues hardest for their own event.

The two axes worth the effort are the growth of the sector the show serves and your position within the set of events serving those same buyers. Both are measurable. Neither is measurable from your own registration file alone, which is the reason they get skipped.

What two axes actually carry information?

Growth of the sector has to come from outside your file. Your own show's revenue is an output of the sector and of your execution together, so using it on the growth axis makes the map circular. Use the sector's own trade body output series, national statistics for the industry code, import and export volumes, or the published results of the largest listed suppliers in that sector. Whichever you pick, use the same source for the same sector every year and write down which one it was.

Position within the sector event set is the second axis, and the cleanest version is a share of space. Take the net square metres your show sells and divide it by the combined net square metres sold by the leading events serving the same buyers, including yours. If your show sells 18,400 net square metres and the three largest events for that buyer group sell 46,000 between them, your position is 40 per cent. If another show sells 4,100 against a combined 31,000, its position is 13 per cent.

Getting the denominator is the work. Some of it is published. FKM, the German society for voluntary control of fair and exhibition statistics, has certified exhibitor numbers, visitor numbers and exhibition space on a uniform standard since 1966, so for any sector with a German edition you can usually read a competitor's space figure straight off a certificate. Outside that, many organisers publish net square metres in their own post show reports, and some publish only gross, which needs adjusting before it goes in the same ratio as your net.

The rest has to be estimated from floor plans, hall capacity and exhibitor lists. Count the stands on a published plan, apply a modal stand size from the same document, and you land within about ten per cent, which is close enough for an axis you are using to rank rather than to price. An estimate you have written down and can defend beats a number nobody has, and the discipline that matters is recomputing it the same way next year rather than getting it exactly right this year.

Karim and Mitchell studied this kind of reconfiguration directly in the Strategic Management Journal in 2000, using more than 3,000 firms offering more than 200 product lines in the US medical sector between 1978 and 1995. They treated product line addition, retention and deletion as the mechanics of changing what a firm is made of, and found that acquisitions play a major role in reconfiguration, giving firms a way both to build on existing resources and to obtain substantially different ones. A show portfolio behaves the same way. What you own is the accumulated residue of addition and deletion decisions, and most groups have done far more adding than deleting.

Reading an eleven show portfolio

Here is the map with numbers on it. Total contribution across the eleven shows is 14.2 million. Seven shows serve sectors that are growing and produce 11.1 million between them, running 3.4, 2.6, 1.9, 1.5, 0.9, 0.5 and 0.3. Four serve sectors that are shrinking and produce 3.1 million, running 1.2, 0.9, 0.7 and 0.3.

So the declining four are 22 per cent of contribution. On that number alone nobody would worry.

Now allocate central overhead. Group costs are 4.8 million, and the driver that consumes them is sales and marketing time rather than revenue, because a show in a shrinking sector needs more calls per square metre sold, more replacement prospecting when an exhibitor folds, and more marketing spend to hold attendance flat. Allocated on that basis, the declining four absorb 2.88 million, which is 60 per cent of central cost against 22 per cent of contribution.

Post allocation, the declining four return 3.1 million less 2.88 million, which is 220,000. The growing seven return 11.1 million less 1.92 million, which is 9.18 million. Put another way, the growing shows generate 5.78 of contribution per pound of central overhead they consume and the declining ones generate 1.08.

One more portfolio level reading falls out of the same map. Of the seven growing shows, four serve variants of the same buyer group, and together they carry 9.4 million of the 11.1 million. That is 66 per cent of total group contribution riding on one buying population. A portfolio built by opportunistic acquisition tends to concentrate this way, because each purchase looked adjacent to the last one and adjacency compounds. The map makes the concentration visible in a way a revenue table never does, since the revenue table sorts by size and the buying population is invisible in it.

The ratio between overhead consumption and contribution is the number I would put in front of a board, because it survives the objection that the small shows are cheap to keep. They are not cheap. They are cheap in direct cost and expensive in attention, and attention is the resource the group is actually short of. What you do about it belongs to the invest, hold, fix or exit classification, which needs thresholds published in advance so the answer reproduces.

Why does a pruned portfolio look like a shrinking one?

Because reported revenue includes the shows you sold and the shows you closed, and a group doing portfolio work properly will report a decline while the retained business grows.

RELX gives a clean published example. Its Exhibitions segment reported revenue of 1,186 million pounds in 2025 against 1,239 million in 2024, a fall of 4 per cent in sterling and 2 per cent at constant currency, while underlying revenue grew 8 per cent. The gap is disposals and event cycling, both of which RELX excludes from its underlying measure. Adjusted operating profit rose from 398 million to 410 million and the margin went from 32.1 per cent to 34.6 per cent, which is what pruning looks like when it works.

The lesson for a private group is to build the same two views before anyone asks. Report the portfolio on a like for like basis and report it as filed, and keep the bridge between them on one page. A board that only sees the reported line will read a deliberate disposal as underperformance, and the next time someone proposes closing a show the conversation starts from the wrong place.

Cycle belongs on the same page

The third piece of information each show carries is when it runs, and it deserves a mark on the map rather than a separate calendar nobody looks at.

In the eleven show portfolio above, seven editions fall between mid February and late April, and those seven carry 9.6 million of the 14.2 million, which is 68 per cent of contribution inside a nine week window. That single fact changes several decisions. Working capital peaks and troughs are steeper than the annual figures suggest. Operations staff are unavailable for anything else for a quarter. Any system migration, rebrand or integration attempted in that window gets ignored, whatever the plan says.

It also changes what a good acquisition looks like. A show that runs in September and serves a growing sector at a weak position may be worth more to this group than a stronger show running in March, because the March show competes for the same people in the same fortnight. Portfolio fit has a calendar component that the two axes alone will not show you.

What the map does not decide

The map is a description. It orders the conversation and it removes the loudest voice advantage, and then somebody still has to decide.

Two specific limits are worth naming. The position axis assumes you can define the competing event set, and in fragmented sectors you cannot. A regional food show competes partly with two national shows, partly with a European one, and partly with a set of buyer conferences that sell no space at all. Any share figure you compute there has a denominator that is an opinion, and the honest treatment is to show a range rather than a point.

The second is that sector growth and show growth come apart more often than the framework implies. A sector can grow 6 per cent a year while its trade show shrinks, because the buying moved online or consolidated into fewer, larger accounts who no longer walk floors. When you see that pattern, the map is telling you the truth about the sector and lying about the show, and the resolution is in exhibitor and visitor behaviour rather than in the sector series. Whether a specific show has passed the point of recovery is a separate test with its own evidence, covered in the decision to close a show.

Start this week with the position axis on your three largest shows only. Pull your net square metres for the last edition, find the two or three events competing for the same exhibitor budget, estimate their sold space from their floor plans and published exhibitor lists, and compute the share. Three numbers will tell you more about where the group actually stands than a year of revenue reporting, and they set up the wider portfolio and synergy view that the rest of this work depends on. If you are also assembling a buyer's case, the separate question of which value drivers a purchaser pays for starts from the same two axes.