{"schemaVersion":"1.0","recordId":"dynamic-business-specialized-dental-partners-millennium-periodontics-chicago-il","revisionCount":1,"revisions":[{"revisionId":"public-catalog-baseline-r38:dynamic-business-specialized-dental-partners-millennium-periodontics-chicago-il:06d51ffe2fb0705b29aacd58","recordId":"dynamic-business-specialized-dental-partners-millennium-periodontics-chicago-il","recordName":"Millennium Periodontics (Chicago, IL)","recordedAt":"2026-08-23T17:27:12.505Z","taskId":"public-catalog-baseline-r38","changeKind":"baseline","changedFields":["baseline snapshot"],"beforeSha256":null,"afterSha256":"06d51ffe2fb0705b29aacd5820008e78e18ba6b1380680761a076b93c6faafa2","before":null,"after":{"id":"dynamic-business-specialized-dental-partners-millennium-periodontics-chicago-il","name":"Millennium Periodontics (Chicago, IL)","entityType":"brand","descriptor":"Millennium Periodontics (Chicago, IL) is publicly associated with Specialized Dental Partners.","ownershipStatus":"confirmed-current","ownershipType":"private equity-backed specialty dental services organization; ownership percentage undisclosed","operatingModel":"local periodontal practice in SDP network (local practice brand, SDP-supported; ","locationScope":"Business or brand-level record; a specific location may have a separate franchisee or operator.","lastChecked":"2026-08-17","primaryEvidence":{"label":"Official business or brand evidence for Millennium Periodontics (Chicago, IL)","url":"https://www.beckersdental.com/dso-dpms/where-specialized-dental-partners-is-adding-practices-in-2024/"},"ownershipChains":[[{"relationshipType":"brand-of","controlLevel":"parent-company","summary":"Millennium Periodontics (Chicago, IL) is listed by an official source as part of Specialized Dental Partners.","parentId":"dynamic-platform-specialized-dental-partners","parentName":"Specialized Dental Partners","parentType":"platform","evidence":{"label":"Official business or brand evidence for Millennium Periodontics (Chicago, IL)","url":"https://www.beckersdental.com/dso-dpms/where-specialized-dental-partners-is-adding-practices-in-2024/"},"lastChecked":"2026-08-17"},{"relationshipType":"portfolio-investment","controlLevel":"portfolio-investment","summary":"Quad-C Management Inc. is the current investment firm connected to Specialized Dental Partners. Ownership: Quad-C Management Inc. is identified on Quad-C’s own portfolio page as being invested in Specialized Dental Partners, and that page is explicitly labeled as current portfolio, which serves as a direct primary source that Quad-C currently owns an equity stake in Specialized Dental Partners; the percentage is not disclosed. Quad-C also issued a formal news release on its website announcing an investment in U.S. Endodontics Partners, the predecessor platform that later rebranded to Specialized Dental Partners, documenting the transaction but not specifying stake size or control terms. These two items satisfy the requirement of at least one direct primary source for current ownership, with terms undisclosed.\n\nMultiple independent transaction and deal-flow sources – including healthcare deal newsletters, acquisition notes, and PE roll-up trackers – consistently describe Specialized Dental Partners as a portfolio company of Quad-C Management or as “owned by” or “backed by” Quad-C in 2023–2026 coverage, with no evidence of a subsequent sale or recapitalization to a different sponsor. One independent source also documents Thurston Group’s earlier exit from U.S. Endodontics Partners to Quad-C, which supports Quad-C as successor owner and shows that Thurston is no longer the owner. Another transaction database lists Quad-C Management among Specialized Dental Partners’ investors alongside a debt provider, reinforcing that Quad-C is the equity sponsor while not contradicting the ownership characterization.\n\nNo credible source indicates that Quad-C has exited its investment o","parentId":"dynamic-firm-quad-c-management-inc","parentName":"Quad-C Management Inc.","parentType":"private_equity_firm","evidence":{"label":"Verified ownership evidence for Specialized Dental Partners","url":"https://www.quadc.com/portfolio/specialized-dental/"},"lastChecked":"2026-08-17"}]]}}],"coverageNote":null,"integrity":"beforeSha256 and afterSha256 are SHA-256 hashes of the exact public JSON snapshots returned in each revision.","license":{"name":"Creative Commons Attribution 4.0 International","url":"https://creativecommons.org/licenses/by/4.0/","attribution":"WHO OWNS THIS? (https://whoowns.cashpaymed.org)"}}