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Johns Hopkins University Department of Physics and Astronomy in 2015-2026 reads as a 109-PI network with 139 internal PI collaborations. The dominant subject mix is Physics and Astronomy as the leading field (56% of slots across 94 PIs; 94 labels), Astronomy and Astrophysics as the leading subfield (30% of slots across 69 PIs; 69 labels), and Galaxies: Formation, Evolution, Phenomena as the leading topic (8% of slots across 24 PIs; 24 labels). That is promising: collaboration is not just one large hairball, and the leading breakdown groups cover 27 PIs across distinct clusters. The leading PI names are Howard E. Katz (66.7 weighted works; Conducting polymers and applications, Organic Electronics and Photovoltaics). The most visible ties are Marc Kamionkowski and Ely D. Kovetz (22 shared works, weight 12.1). The leading breakdown groups are group 1 with 10 PIs, 24 internal connections, weight 54.6, around Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, led by Tyrel M. McQueen, Satoru Nakatsuji, N. P. Armitage; group 2 with 10 PIs, 11 internal connections, weight 41.2, around Astronomy and Astrophysics, Nuclear and High Energy Physics, Oceanography, led by Joseph Silk, Adam G. Riess, Marc Kamionkowski.