-$0.19
$0.35
bear -$0.19
base -$0.06
bull $0.35
margin of safety $0.10
market price* $1.32
Business condition attached to the margin of safety
Owner earnings (operating cash flow less working-capital swings, stock compensation and capital spending) must turn positive and stay positive for two consecutive years, showing that capital spending has settled back near its pre-2024 level of roughly $10 million a year, and the $342 million term loan must be refinanced or reduced well ahead of its June 2029 maturity.
Ribbon Communications sells software and equipment that carry voice and data traffic for telephone companies, cable operators, governments and large enterprises. In 2025 it had revenue of $844.6 million in two segments: Cloud and Edge ($511.4 million) and IP Optical Networks ($333.1 million). Nearly half of revenue is recurring or service-like: $270.6 million of maintenance and support and $139.4 million of professional services. About 52% of revenue comes from outside the United States, and Verizon was about 17% of 2025 revenue, up from 14% in 2024. How we measure earnings. We look at cash from operations, then remove one-off swings in working capital, subtract stock-based compensation as a real cost, and subtract the capital spending needed to stay in business. On that basis Ribbon has earned very little for shareholders. Owner earnings per share were about -$0.18 (2018), $0.76 (2019), $0.21 (2020), $0.26 (2021), -$0.03 (2022), -$0.11 (2023), -$0.11 (2024) and -$0.05 (2025). The 2019 figure is inflated because we strip out a $50.9 million working-capital outflow that year. We judge the business from 2020, when an acquisition (net cash paid $346.9 million) lifted revenue from $563.1 million in 2019 to $843.8 million; the median of 2020 to 2025 is about -$0.04 per share, and total owner earnings across those six years add up to only about $16 million. Reported 2025 net income of $39.6 million is not a guide to earning power: it includes an $85.6 million non-cash deferred tax benefit. Underlying cash generation did improve: operating cash flow before working-capital movements rose from $13.0 million (2023) to $18.7 million (2024) to $34.8 million (2025) as costs were cut. Against that, stock compensation takes $19.4 million and the company pays heavy interest: the term loan was $342.1 million at year-end 2025 at an average rate of 10.3%, and cash interest paid was $38.0 million. Capital spending rose to $22.4 million in 2024 and $25.3 million in 2025, which the company attributes mainly to building out a new facility in Israel. It was $9.4 million in 2023 and $10.3 million in 2022. The passages we reviewed give no end date for the build-out. Acquired intangibles are being written off ($44.2 million of amortization in 2025, down from $50.9 million in 2024 and $56.9 million in 2023). That charge is non-cash and is correctly added back, but it reflects acquired assets that wear out, so we give no credit for growth from them. Maintenance revenue slipped from $274.6 million to $270.6 million in 2025, which the company attributes to decommissioning of older legacy equipment at several Cloud and Edge customers. Growth. Owner earnings improved by about $10 million between 2024 and 2025 (from a $19.7 million loss to a $9.7 million loss). Percentage growth is not meaningful from a loss, and our base case assumes no further growth in year one, since the cost savings already show in the 2025 figure and we have no named source of more. Growth from voice modernization projects for U.S. carriers (professional services rose $27.3 million in 2025), new products, and share gains is left out because it is not yet secured or proven repeatable. Bear case: about -$0.19 per share. Owner earnings stay at the 2025 level of about -$9.7 million a year through the June 2029 maturity of the term loan (roughly $298 million is due at maturity). That is about -$34 million in present value, or about -$0.19 per share, and we assign no value beyond 2029 because nothing evidenced supports the company repaying or refinancing that balloon while losing money. In this case the company appears to owe more than the business is worth, by roughly $34 million. Base case: about -$0.06 per share, which is effectively nothing. The 2025 cost savings hold, but capital spending falls only partway from its 2024-2025 level (about $24 million) back toward its 2022-2023 level (about $10 million), landing near $17 million. Owner earnings are then about -$1.5 million a year ($15.4 million of cash after stock compensation, less about $16.9 million of capital spending), which over ten years is worth about -$11 million, or about -$0.06 per share; we credit no value after year ten. Bull case: about $0.35 per share. The Israel build-out ends and capital spending returns to the roughly $10 million a year seen in 2022 and 2023, leaving about $5.6 million a year of owner earnings. We hold that for ten years, then fade it evenly to zero over the following twenty, because a recurring maintenance and services base of over $400 million a year supports long persistence but no growth is credited. That is worth about $63 million, or $0.35 per share on roughly 180 million diluted shares. What could make this wrong: a faster end to the facility build, further cost cuts, or lower interest costs (the loan margin steps down as leverage falls) would lift these values, and we have not credited them because none is yet in evidence. A loss of Verizon volume or a refinancing on worse terms would push results toward the bear case. We do not subtract debt separately, because owner earnings are already after interest; leverage is reflected in the bear case. Margin-of-safety price: $0.10 per share, applicable only if the business condition is met. The three cases span a negative value to about $0.35, and the leverage and customer concentration call for a wide margin of safety.