Quantum Down 41%, Is It Cheap?

If you're still using EDGAR to read SEC filings, you're wasting your time! Just use SECSift.

It's the obvious solution if you want to cut down the time spent reading filings by more than half and better understand any business.

🌾 Welcome to StableBread's Newsletter!

I first wrote up Quantum (Nasdaq: QMCO), which makes tape libraries that companies use to archive data for years, on May 6, 2026, at $7.36/share.

By my August 16 update, where I said I’d look again if its sales multiple gave back part of its re-rate while demand still outran supply, QMCO was at $26.11.

The stock then ran another 32.1% to a $34.50 close on October 2, 2026, a week before Quantum fired its CFO.

Now QMCO has fallen to $20.25/share, down 41.3% from that peak and 22.4% since my August update, but still more than double the $9.42 investors paid in Quantum’s June private placement (PIPE):

Worth mentioning that the larger hard drive and flash memory stocks have fallen from their 2026 highs as well, through the October 27 close:

So Quantum fell about as far as the group, but in under four weeks instead of four months, and mostly after the CFO was fired.

At $20.25/share, Quantum’s EV is $825.3M, counting its warrants, options, and RSUs. That’s 2.8x its TTM revenue, down from 3.7x at the $26.11 price in my August update (measured the same way).

So the sales multiple has given back part of its re-rate, and by management’s account, demand still outran supply as of the June-quarter call.

Meanwhile, Quantum has hired a COO, granted its executives new options, and said it expects to meet or exceed its September-quarter guidance since my August update.

Below, I cover what Quantum has and hasn’t said about the firing, why the storage selloff explains only part of the drop, and the option grants since August, with no insider selling. Then I conclude with my updated valuation and whether I’m buying.

Quantum terminated William White as CFO on October 9, 2026, effective immediately, eight months after appointing him on February 2, 2026.

The 8-K gives no reason, and I found no press release about the firing on Quantum’s investor relations site.

Instead, the 8-K says Quantum expects to file its September-quarter 10-Q on time. The filing also says Quantum expects to meet or exceed its guidance for the quarter, even though it was still “early in its financial closing process.”

Chief accounting officer Hiral Patel took over as principal financial officer, so she now signs off on Quantum’s financial statements with the CEO.

Patel only joined Quantum on September 1, after the company decided on August 11 to replace Laura Nash as chief accounting officer. Before that, she was chief accounting officer at Pep Boys, the auto service and parts retailer.

The 8-K on Nash says there are “no disagreements” between her and the company, but the one on White doesn’t say either way.

So within two months, Quantum replaced both of its top finance officers.

Quantum’s June-quarter 10-Q still reports material weaknesses (the most serious kind of gap in a company’s financial reporting controls) in revenue recognition, inventory, and income taxes.

It also says Quantum “lacked sufficiently qualified staff or resources to perform control activities.”

None of the weaknesses has led to a material misstatement, but Quantum has restated its financial statements before, in May 2024 and again in August 2025.

Quantum expected to fix one of its three revenue weaknesses, the schedules that set when service revenue is recognized, by the end of the September quarter.

Its June-quarter 10-Q was also officially filed on August 11, a day after its 40-day deadline, and its FY2026 10-K needed a notice of late filing in June.

So with open material weaknesses, a history of restatements, and a 10-Q filed a day late in August, I’d rather see the September-quarter 10-Q, due November 9, before taking Quantum at its word.

Quantum’s drop started the week before the firing, along with a selloff in hard drive stocks.

Toshiba, which makes hard drives like Seagate and Western Digital, said on October 2 that its Philippine plant is “aiming to nearly double its annual production capacity” of data center hard drives by its fiscal year starting April 2027.

Seagate and Western Digital each fell 10.2% that day, while Quantum rose 8.2% to its peak.

More hard drive supply could (1) hurt Quantum by easing the disk shortage that helped push customers toward tape, as I covered in my April 22 tape primer, and (2) help Quantum by easing the constraints on “certain disk drives” that CEO Hugues Meyrath mentioned on the June-quarter call.

From October 2 to October 9, Quantum fell 11.8%, vs. 4.3-8.0% for SanDisk, Seagate, and Western Digital.

Then, from the October 9 close, before the firing was disclosed, to October 27, Quantum fell another 33.4%, vs. 4.1-17.5% for the three storage stocks:

So the storage selloff explains part of the drop from $34.50, but most of it came after the firing, which is specific to Quantum.

Meanwhile, the LTO Program, the group of HPE, IBM, and Quantum that sets the LTO tape standard, reported on September 1, 2026 that tape capacity shipped in Q1 2026 rose 57% from Q1 2025.

The 57% measures data capacity, and each new LTO generation holds more data per cartridge, so capacity shipped can grow faster than the number of cartridges sold.

Meyrath said on the June-quarter call that Quantum’s $82.0M ±$2M revenue guidance for the September quarter is only “mildly up” because tape drive supply had stayed “flat for the past handful of months.”

IBM, which supplies the drives, had told Quantum it would increase production toward the back half of the year, but Meyrath said the increase still hadn’t shown up as of August.

So by Meyrath’s account, IBM’s drive supply, not demand, limits how much Quantum can sell for now.

No Quantum insider has bought or sold shares in the open market since my August update, including Dialectic, the activist fund managed by director John Fichthorn.

Dialectic received 14.1M shares in June when it settled its convertible notes, 35.8% of the 39.4M shares outstanding, which makes it Quantum’s largest shareholder.

Its lockup, which also covered Quantum’s officers and directors, ended on August 23, 30 days after the PIPE shares were registered for resale.

So Dialectic could’ve sold into the run to $34.50, and it hasn’t reported a sale.

On October 1, Quantum granted options to buy shares at $31.885, that day’s close, to three executives:

The options vest monthly over four years and only pay off above $31.885, 57.5% above $20.25.

White, fired eight days later, got no grant.

Shareholders also approved 3.4M more shares for Quantum’s equity plan on September 15, 8.6% of the shares outstanding.

So the largest holder hasn’t sold, and management’s new options only pay off above $31.885. But no insider bought during the drop either.

At $20.25/share, Quantum has a market cap of $798.1M and an EV of $825.3M ($902.3M on 44.6M diluted shares - $77.0M of cash, including the $22.6M warrant and option holders would pay to exercise, with no debt).

That’s 2.8x TTM revenue, down from 4.9x at the October 2 peak, but still 34.4x the September quarter’s $6M ±$1M of adjusted EBITDA guidance, annualized.

So Quantum isn’t cheap on profits yet, since its adjusted EBITDA margin is still under 10%. That’s why my cases below use revenue multiples.