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The generation of squeezed states of light lies at the heart of modern photonics-based quantum information technologies. Traditionally, optical nonlinear interactions have been employed to produce squeezed states. However, the harnessing of electrically pumped semiconductor lasers offers distinctive paradigms to achieve enhanced squeezing performance for real-world applications. We present the first evidence that quantum dot lasers enable the realization of broadband amplitude-squeezed states at room temperature across a wide frequency range, spanning from 3 GHz to 12 GHz. Our findings are corroborated by a stochastic simulation in agreement with the experimental data.