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ROCKWOOD RESEARCH · A CORPORATE FILINGS WEBSITE|STRAIGHT FROM THE SOURCE · SEC EDGAR|SPONSOREDYour message on this tape — bid on the Rockwood Ad Exchange · Rockwood Ad Exchange|

Rockwood Research

HSIC

HENRY SCHEIN INC

Wholesale-Medical, Dental & Hospital Equipment & Supplies · SIC 5047CIK 1000228Held by 11 tracked managersEDGAR filings ↗10-K/10-Q ↗

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11 of 11 reported changes in each tracked manager’s latest 13F vs its prior quarter (2 reporting periods). Every change is listed — no cap.

ManagerActionShare change% chgEnding % of 13F bookPosition size

Holocene Advisors

Q2 2026Position history →

New+122,025—0.02%$10.2M

Greenlight Capital (DME)

Q2 2026Position history →

Add+119,250+19.9%1.5%$60.0M

Bridgewater Associates

Q2 2026Position history →

Add+26,895+83.8%0.02%$4.9M

Palestra Capital Management

Q2 2026Position history →

Trim(965,976)(28.3%)6.9%$204.3M

Lyrical Asset Management

Q2 2026Position history →

Trim(77,091)(5.0%)1.6%$122.6M

Pzena Investment Management

Q2 2026Position history →

Trim(26,906)(3.0%)0.21%$71.9M

Lakewood Capital Management

Q2 2026Position history →

Trim(165,000)(63.0%)0.42%$8.1M

Olstein Capital Management

Q1 2026Position history →

Trim(15,000)(16.9%)1.2%$5.5M

Fuller & Thaler Asset Management

Q2 2026Position history →

Trim(138)(0.3%)0.01%$4.3M

Adage Capital Management

Q2 2026Position history →

Trim(18,000)(42.6%)<0.01%$2.0M

First Pacific Advisors

Q2 2026Position history →

Exit(9,914)(100.0%)exited$0.7M

Changes compare each manager’s latest 13F with its prior quarter for the same CUSIP. “First observation” rows have no earlier stored filing to compare and are never counted as buys; “Split?” rows moved by a near-whole factor at an unchanged value and are treated as stock splits, not trades. Ending weight is the position after the change, not the size of the change.