Altra Industrial Motion Corp. Stock: price and directors' dealings · United States · SEC (Form 4)

About Altra Industrial Motion Corp.

Altra Industrial Motion Corp. was a U.S.-based industrial company focused on electro-mechanical power transmission and motion-control solutions. Before being acquired and integrated into Regal Rexnord, it was a well-known niche supplier to industrial OEMs and aftermarket customers, serving end markets such as industrial machinery, off-highway equipment, automotive-related applications, rail, energy, and aerospace-adjacent systems. The company was listed in the United States on the NYSE/NASDAQ, and its headquarters were in Braintree, Massachusetts, United States. ([sec.gov](https://www.sec.gov/Archives/edgar/data/1374535/000095017023005578/aimc-20221231.htm?utm_source=openai)) Altra’s development reflects a classic industrial roll-up strategy. SEC filings state that the company was incorporated in Delaware in 2004, while a meaningful part of its operating heritage came from earlier acquisitions in mechanical power transmission. Over time, Altra assembled a portfolio of specialized brands with strong technical reputations, including Kollmorgen, Thomson, Warner Electric, Boston Gear, Formsprag, Stieber, Twiflex, Svendborg Brakes, and Portescap. That brand architecture allowed the group to address a wide range of motion-control needs while retaining a focused engineering identity. ([sec.gov](https://www.sec.gov/Archives/edgar/data/1374535/000156459021009491/aimc-10k_20201231.htm?utm_source=openai)) Operationally, the company designed, manufactured, and marketed components and subsystems used to transmit power and control motion. Its product set included couplings, clutches, brakes, gear motors, linear actuators, bearings, and related drivetrain technologies. Altra’s business model relied on a global manufacturing and sales footprint, with production facilities across multiple countries and a commercial approach that combined OEM sales with aftermarket support. That international network was a key competitive advantage, helping the company serve large customers while also supporting highly engineered, application-specific requirements. ([sec.gov](https://www.sec.gov/Archives/edgar/data/1374535/000095017023005578/aimc-20221231.htm?utm_source=openai)) From a competitive standpoint, Altra was positioned as a specialized industrial technology platform rather than a broad conglomerate. Its strength lay in mission-critical products where reliability, precision, braking performance, and maintenance support matter more than price alone. The company’s solutions were widely used in heavy industrial environments and other demanding applications, and its brand portfolio gave it meaningful reach across multiple subsegments of motion control. In that sense, Altra competed on technical differentiation, installed-base relevance, and customer intimacy. ([altramotion.com](https://www.altramotion.com/en/newsroom/2022/09/powering-up-off-highway-equipment?utm_source=openai)) A major recent development is that Altra’s corporate website now states that Altra Industrial Motion is part of Regal Rexnord. In practical terms, that means the standalone public-company profile is historical rather than current. For investors reviewing SEC Form 4 insider activity, this matters because older filings may still reference AIMC as an issuer, but the operating business has since been absorbed into a larger industrial platform. ([altramotion.com](https://www.altramotion.com/en?utm_source=openai))