Picture an operating partner with four plastics portfolio companies: a packaging business, an automotive parts supplier, a pipe extruder, and a custom molder. Together they buy well over 100 million pounds of resin a year, yet each one negotiates alone, with its own suppliers, its own terms, and its own sense of a fair price. Since nobody compares the four on the same basis, the operating partner has no reliable way of telling which one is paying the most for similar material, or whether all four are paying more than they should. Cross-portfolio resin procurement, which means coordinating resin buying across a fund's companies, gives the fund a way to answer both questions.
The obvious fix is to pool all that volume. Plenty of private equity procurement teams already do that for office supplies, safety gear, and software, through group purchasing programs that let every company buy on one negotiated contract. With resin, though, that kind of spend aggregation only works for certain grades and producers, and it can backfire pretty quickly when it's forced.
That's why we'd start somewhere else, with a common spend map and one benchmark for every company. Once those are in place, pooling becomes a grade-by-grade call, and for the resin that doesn't pool, the companies can still share a market read and one way of handling price increases and renewals. Those steps make more sense once you see why resin doesn't pool like other spend.
Group purchasing works for gloves and office supplies because a box of nitrile gloves in Ohio is the same box in Georgia, so one supplier can price one big order for everyone. Resin just isn't like that.
For one thing, many companies buy specific grades that their customers have tested and approved, a process the industry calls qualification. That alone keeps a lot of resin out of any pool. The auto parts supplier, for example, can't switch to a cheaper polypropylene grade, or even an equivalent grade from another producer, until its customer signs off, which can take months or longer.
Producers also price by account. A typical polyethylene contract is priced off a monthly published index, with each buyer negotiating its own discount based on volume, delivery mode, and credit, as well as how much the producer wants the business. So two portfolio companies buying the same grade from the same producer can end up on different discounts, and their freight terms and renewal dates rarely match either. Before they can buy together, someone has to line up those dates and pick whose terms the combined volume goes out on.
Then there's supply risk. When the market gets tight, producers allocate material by contract and relationship, so an operating partner who has steered all four companies toward one producer can find every one of them short at once.
None of that rules pooling out, but it does mean nobody can say where it fits until they know exactly what each company buys, from whom, and on what terms.
So the first job is a common picture of what each company buys. That's usually more work than it sounds, since portfolio companies tend to track resin very differently. Still, resin runs 50 to 80 percent of cost of goods sold for many plastics manufacturers, so the effort goes where most of their money does.
For each company, capture:
While those maps show what every company buys and on what kind of contract, without anyone sharing actual prices yet, they can't tell the operating partner which company pays the most for similar material. For that, you need a benchmark.
With the map in hand, the next job is to measure each company's net price against one outside reference, grade by grade. The index alone is a weak reference, because it shows where the market settled, not what comparable buyers pay after their discounts. A transaction-based benchmark gets much closer to that number. Recent competitive quotes can fill gaps, though they show what a supplier offered rather than what anyone paid. For a company the fund bought recently, the deal team's work during resin procurement due diligence often gives you a head start.
To run that benchmark across the portfolio, someone has to gather every company's contract prices in one place, and the catch is that supplier contracts often bar sharing them. Swapping prices between portfolio companies can also raise antitrust issues, especially when they compete for customers or buy the same resin. We'd handle both by having an outside party benchmark each company separately under NDA, once counsel confirms each contract allows that disclosure or the supplier agrees to it.
That outside party should normalize each net price for freight, delivery mode, buying channel, volume, payment terms, rebates, and which month's index the price is set off before comparing anything. Otherwise a company buying truckloads through a distributor will usually look like an overpayer next to a direct railcar buyer.
When every company is measured that way, you'll often find two companies paying noticeably different prices for similar grades, or one whose discount from its last renewal now trails what comparable buyers get. To find out why, we'd run a resin margin leakage diagnostic on each company's contract terms and purchase timing. And once you know which companies are overpaying and why, the pooling question from the start gets much easier to answer.
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Now you can come back to pooling and take it one grade at a time. A single overpayer usually just needs its own contract renegotiated, so the grades to look at first are the ones several companies run and the benchmark shows all of them paying above market. The packaging business and the custom molder might both run general-purpose homopolymer polypropylene from the same producer, for instance, while the auto parts supplier's customer-approved grades stay off the table.
The best candidates usually share a few traits:
Even then, combining volume rarely means one master contract. More often the companies run a coordinated request for quotes, cleared with counsel, and each signs its own agreement. That doesn't keep the risk apart, because a producer pricing on combined volume usually wants a combined commitment or a rebate on total pounds, so one company's shortfall can put the whole group's pricing at risk. A company that's sold can also lose its portfolio discount.
A pooled grade also brings back the supply risk from earlier, so we'd keep a second qualified source for every pooled grade in case that one producer allocates material and cuts every company back at once.
For most of a portfolio's resin, the grades, producers, and renewal dates won't line up well enough to pool, but a portfolio view still pays off there. The custom molder's buyer only sees how its own suppliers' price increases played out, while the portfolio's benchmark results can show whether one company absorbed more of the same increase than the others.
That comparison usually falls to one person, a resin lead. The lead advises rather than buys, because plant managers and buyers know their customers, specs, and schedules best. Prices stay with the outside benchmarker, so the lead works from each company's benchmark results and goes over any one company's letters and invoices with that company alone, and counsel should decide what the lead can share and whether the role sits at the fund, a portfolio company, or an outside firm. The job covers four things:
Once those quarterly benchmark results are coming in, we'd keep the program honest with a few measures that every company reports identically to its own management and board:
Since every company builds these numbers the same way, they're easier to defend in a board update and easier for acquirers to test at exit. They also give you the baseline for any wider push on resin cost savings in PE portfolio companies. Any company the fund buys next can feed its early work on resin procurement after an acquisition straight into the same measures.
Go back to that operating partner whose four companies buy resin four different ways. There's a good chance at least one of them is paying more than it needs to, and maybe all four, which is a pattern we see often, since roughly a quarter of our engagements involve PE-backed companies. A common map and benchmark will tell you which ones without moving anyone onto a shared contract.
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Cross-portfolio resin procurement is how a private equity firm coordinates resin buying across several plastics portfolio companies. It usually means mapping spend the same way and benchmarking every company against a common outside reference, pooling volume only where grades, suppliers, and logistics line up.
PE firms can pool resin volume across portfolio companies that buy similar commodity grades from the same approved producers. Each company usually signs its own agreement, though better pricing on combined volume tends to come with a combined commitment that one company's shortfall or sale can put at risk. Counsel should review any joint bid first.
Group purchasing works less well for resin because resin pricing depends on the grade, delivery mode, and each account's own contract. Many grades are also qualified with the processor's customers, often down to the producer in automotive work, so they can't simply be swapped for a pooled alternative.
A PE firm should benchmark resin costs by measuring each company's net price, normalized for freight, delivery mode, buying channel, terms, and rebates, against the same outside reference every quarter. Because supplier contracts often restrict sharing prices, a third party can benchmark each company separately under NDA, with counsel checking each contract first.
Resin buying usually shouldn't be fully centralized across a PE portfolio, because plant-level buyers know their customers, specs, and schedules. A central resin lead who advises rather than buys can capture much of the benefit of a portfolio view.
Cross-portfolio resin procurement still works for a smaller PE portfolio, because the benchmark doesn't depend on pooling. Even with two or three plastics companies and little volume to combine, a common benchmark shows which ones are overpaying.