Cullinan Therapeutics Q3 2025 Operating Expenses

If you landed here, you were probably reading an income statement and wanted the clean numbers. You'll get them below. Then we'll do the thing the financial-news pages skip: turn that same operating-expense framework into a tool you can point at your own store's monthly P&L.

Cullinan Therapeutics Q3 2025 operating expenses, line by line

A biotech's "operating expenses" are the two big spending lines that sit below revenue on the income statement: research and development (the science) and general and administrative (payroll, legal, office, and running the company). Cullinan's split for the quarter looked like this:

Every figure above comes from the company's Q3 2025 financial results, reported November 6, 2025. Total operating expenses rose about 14% year over year, and nearly all of that increase came from the R&D line.

The company also held $475.5 million in cash, equivalents, and investments as of September 30, 2025, enough runway into 2029 under its new operating plan, according to the same release. Hold that last number in mind. It is the whole reason a company can post a $50.6 million quarterly loss and still be considered healthy — and it is the one advantage your store does not have.

What "operating expenses" actually means — and what it leaves out

Operating expenses are the recurring costs of running the business that are not tied to producing a single unit of the thing you sell. For a drugmaker, that's the lab and the head office. For you, it's your apps, your ad spend, your tools, and any help you pay for.

The cost of the actual product — what you pay a supplier to make and ship each order — is a separate line called cost of goods sold. Keeping those two apart is the single most useful accounting habit an operator can build, and it's worth reading up on how to handle recording cost of goods sold correctly before you try to read your own operating expenses.

Why does the split matter? Because COGS scales with every order, while operating expenses mostly don't. Add 100 more orders and your COGS climbs in lockstep; your Shopify subscription doesn't budge.

Your store has an income statement too

Cullinan's structure — big R&D, smaller G&A, funded by a cash pile — is the biotech shape. A print-on-demand store has the opposite shape: almost no "R&D," a heavy COGS line because every item is produced per order, and an operating-expense bucket dominated by one thing — ad spend.

Let's build the operator version. Say you run 340 orders a month at a $31 average order value. That's $10,540 in monthly revenue.

Now the COGS. Say each order costs you $9 in product and $5 in shipping to your Printify or Printful supplier — $14 per order. Across 340 orders that's $4,760 in cost of goods sold, leaving $5,780 in gross profit.

Reading your own OpEx like a quarterly report

Here is where the operating-expense discipline pays off. Line up every recurring cost that isn't COGS:

• Shopify plan plus apps: $105
• Meta ad spend: $2,800
• Klaviyo email: $60
• Payment processing (about 2.9% + $0.30 per order): roughly $408
• Design and VA help: $400

That's about $3,773 in monthly operating expenses. Subtract it from your $5,780 gross profit and you're left with $2,007 in operating profit — a 19% operating margin ($2,007 ÷ $10,540), or about $5.90 of true operating profit per order ($2,007 ÷ 340).

Notice what just happened. Ad spend was 74% of your operating expenses ($2,800 ÷ $3,773) — almost the exact share R&D took of Cullinan's. Different business, same lesson: one line dominates, so that's the line you manage first.

Cullinan's real lesson: operating expenses only make sense against runway

The financial-news headlines framed Cullinan's quarter as a widening loss. That's technically true and mostly beside the point. A clinical-stage biotech is supposed to spend more than it earns while it develops drugs — that's what the $475.5 million cash cushion and the runway into 2029 are for.

The company even raised R&D while cutting two programs (CLN-619 and CLN-617), per its Q3 release. That's the discipline: they didn't slash spending across the board, they concentrated it on the programs most likely to pay off, and extended runway by killing the ones that weren't.

You have no $475 million runway. Your rule is simpler and harder: operating expenses must stay below gross profit every single month, because your cash cushion is whatever you didn't spend last month. That's why the per-order operating profit number matters more to you than any top-line revenue figure.

How to cut operating expenses without cutting muscle

Cullinan's move — reallocate, don't just amputate — is the right instinct for an operator too. The wrong cut kills a program (or an ad set) that was actually working. The reference material on how to reduce operating expenses in business goes deeper, but the operator shortcut is:

Attack the biggest line first. In the example above, trimming ad waste by 15% saves $420 a month — more than eliminating your entire email tool and half your app stack combined. Small lines feel satisfying to cut; big lines are where the money is.

Then tighten the operations layer that quietly leaks margin — refunds, reprints, chargebacks, and shipping incidents. A single lost dispute can cost roughly two to two-and-a-half times the order value once you add unrecoverable COGS, the fee, and the ad spend that acquired the customer, according to chargeback.io. Getting your broader ecommerce operations management right is often a bigger margin win than any subscription you cancel. If you want to see how a mature, non-tech company lays out its cost lines for comparison, the breakdown in JB Hunt's 2023 Form 10-K operating expenses is a useful mirror, and the ecommerce ops economics hub ties all of these threads together.

Where an AI employee fits

Reading your own operating expenses this cleanly means pulling numbers from five or six places every month — Shopify, your ad platforms, your POD supplier, your email tool — and reconciling them by hand. That reconciliation is exactly the work most operators skip, which is how the ad line quietly eats the margin.

Victor, the AI employee from PodVector AI, does that reconciliation on your live data. He connects to Shopify, Meta Ads, Google Ads, Printify, Printful, Gelato, and Klaviyo, computes your true per-order profit after COGS and operating expenses, and delivers the report to your Google Drive. Every write action he takes — including any customer-support email he drafts — is approval-gated, so you approve before anything sends. If you'd rather read a real operating-expense picture than assemble one, start with PodVector AI.

FAQs

What were Cullinan Therapeutics' Q3 2025 operating expenses?

Total operating expenses were $55.6 million for the third quarter of 2025, made up of $42.0 million in R&D and $13.6 million in G&A, up from $48.9 million in Q3 2024, per the company's Q3 2025 results. The net loss attributable to Cullinan was $50.6 million for the quarter.

Why did Cullinan's operating expenses increase year over year?

The increase came almost entirely from R&D, which rose to $42.0 million from $35.5 million as the company concentrated spending on its high-conviction clinical-stage programs after discontinuing CLN-619 and CLN-617, according to the Q3 release. G&A was nearly flat at $13.6 million versus $13.3 million a year earlier.

What's the difference between operating expenses and COGS for my store?

Cost of goods sold is what you pay to produce and ship each order — it scales with volume. Operating expenses are the recurring costs of running the business (apps, ads, tools, help) that mostly stay fixed as orders rise. Keep them on separate lines; see recording cost of goods sold for how to do it cleanly.

How much of my revenue should operating expenses consume?

There's no universal number, but the useful move is to compute your operating margin the way the worked example above does: gross profit minus operating expenses, divided by revenue. In that example it landed at 19%, with ad spend eating 74% of the operating-expense bucket — which tells you exactly where to look first.

Does Cullinan's cash runway have any lesson for a small store?

Yes: operating expenses are only "fine" relative to how long your cash lasts. Cullinan can absorb a large quarterly loss because it holds $475.5 million with runway into 2029. Your store's runway is last month's leftover profit, so your operating expenses have to stay below gross profit every month — there is no cushion doing the work for you.