Harmonic's cOS turns it into a software business whose margins rise with every cable operator that converts from hardware. cOS virtualizes cable access networks, holds over 95% share of virtualized CCAP and serves every major US cable operator; DOCSIS 4.0 upgrades by Charter, Comcast and Cox against fiber require it. Q1 revenue rose 43% to $121.7M, backlog rose 87% to $582M of mostly software and services, and gross margin is 52%. At 3.5x forward revenue versus peers' 4-6x, it hasn't re-rated. … Show more

Harmonic is the clearest pure-play winner of a multi-year cable broadband upgrade cycle driven by agentic AI and home compute pulling more bandwidth. Its cOS runs the networks of almost every major cable operator with about 95% share, and replacing it needs 18–24 months of certification, so it owns the market into 2028. Business outside its two largest customers grew 78% and is now most of bookings. Growing 43%, it trades in the low 20s on FY2027 earnings. x.com 

Harmonic is turning into a pure-play AI-broadband infrastructure compounder the market still prices as the old company. Selling its video business to MediaKind for $145M leaves pure broadband, with cash for DOCSIS 4.0, fiber and buybacks. Q1 broadband revenue rose 43%, backlog 87% to $582.1M, and FY26 broadband guidance was raised to $475-495M. Its cOS platform first unified FDX and FDD DOCSIS 4.0, so operators needn't switch suppliers, and 33M+ devices create sticky switching costs. x.com  x.com  … Show more

Harmonic is a high-risk, high-reward bet on the multi-year DOCSIS 4.0 cable upgrade cycle as it sells its video segment for $145M to become a pure-play broadband company. Q1 2026 broadband revenue rose 43%, backlog hit a record $574M, up 87%, and full-year guidance was raised to $475-495M. It remains GAAP unprofitable, depends heavily on Comcast, has flagged supply chain issues and is early in its shift to recurring revenue. x.com 

Harmonic is the toll booth between AI-era traffic and US cable networks, with over 95% of the software operators need for DOCSIS 4.0 upgrades. Upstream traffic grows 21.7% a year, so operators must upgrade or lose subscribers to fiber. Comcast, Charter, Cox and Altice run its cOS platform, and every node in Charter's $5.5B upgrade needs a Harmonic license. Q1 revenue rose 43% and backlog hit $582M, up 87%, while software should rise from 8% of revenue in 2022 to 38% by 2028. x.com  x.com  x.com 

Harmonic gains pricing power as fiber becomes structurally scarce, because it sits at the platform layer powering fiber and cable networks. The US has 159.6 million fiber miles but needs 372.9 million by 2029, and North American demand grows 22-25% a year while supply expands 12-19%. Fiber prices are up about 70% from the 2021 trough, AI data centers need about 36x more fiber than CPU racks, and data centers may be 30% of global demand by 2027. That makes an asymmetric setup. x.com 

Harmonic's fundamentals kept improving while the market forgot it. It delivered a double beat and raised guidance, and the stock showed strong price action with a clean retest of its 50-week average. x.com 

Prepaid fiber orders make 2027-28 demand a stronger signal than capex plans. Corning reports $639M in net customer deposits in the first nine months and expects data-center interconnect to beat its former $1B-by-2030 target on timing and size. That backs Lumen's intercity build, though its next allocation may require a bigger commitment. Tight Corning supply gives Amphenol room to gain share until capacity expands; strong demand alone has not lifted stocks across the chain. x.com 

Adtran rides three spending cycles still in their first innings. The US is spending $42.5B to bring fiber to every unserved household through 2028-plus, buying the OLTs, ONTs and optical transport Adtran makes; European telcos are replacing Huawei and ZTE gear, where Adtran has the only optical platforms approved for EU/NATO classified data; and an EU 2030 post-quantum mandate suits its ConnectGuard encryption. Revenue rose 15.5% to $286M, it is GAAP profitable, and it trades at 1.17x sales. … Show more