Abbott Laboratories
MX ˙ BMV ˙ US0028241000
SecurityMX:ABT / Abbott Laboratories
InstitutionRosenberg Matthew Hamilton
Latest Disclosed Ownership2,941 shares
Latest Disclosed Value $ 301,952
Rosenberg Matthew Hamilton reports 23.16% increase in ownership of ABT / Abbott Laboratories

On April 6, 2026 - Rosenberg Matthew Hamilton filed a 13F-HR form disclosing ownership of 2,941 shares of Abbott Laboratories (MX:ABT) valued at $301,952 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 5, 2026 disclosing 2,388 shares of Abbott Laboratories. This represents a change in shares of 23.16% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-06 2026-03-31 13F ABBOTT LABORATORIES COM Stock 002824100 2,941 553 23.16 302 0.67 0.0619
2026-01-05 2025-12-31 13F ABBOTT LABS COM Stock 002824100 2,388 276 13.07 299 6.03 0.0620
2025-11-10 2025-09-30 13F ABBOTT LABS COM Stock 002824100 2,112 102 5.07 283 3.30 0.0611
2025-07-28 2025-06-30 13F ABBOTT LABS COM Stock 002824100 2,010 248 14.07 273 17.17 0.0636
2025-04-28 2025-03-31 13F ABBOTT LABS COM Stock 002824100 1,762 88 5.26 234 23.28 0.0586
2025-01-14 2024-12-31 13F ABBOTT LABS COM Stock 002824100 1,674 21 1.27 189 0.53 0.0492
2024-10-28 2024-09-30 13F ABBOTT LABS COM Stock 002824100 1,653 115 7.48 188 18.99 0.0493
2024-07-26 2024-06-30 13F ABBOTT LABS COM Stock 002824100 1,538 -118 -7.13 159 -14.59 0.0469
2024-04-22 2024-03-31 13F ABBOTT LABS COM Stock 002824100 1,656 -29 -1.72 186 0.00 0.0536
2024-01-16 2023-12-31 13F ABBOTT LABS COM Stock 002824100 1,685 -262 -13.46 185 -1.60 0.0571
2023-10-11 2023-09-30 13F ABBOTT LABS COM Stock 002824100 1,947 -29 -1.47 189 -12.56 0.0628
2023-07-26 2023-06-30 13F ABBOTT LABS COM Stock 002824100 1,976 -307 -13.45 215 -6.93 0.0728
2023-04-17 2023-03-31 13F ABBOTT LABS COM Stock 002824100 2,283 32 1.42 231 -6.48 0.0746
2023-01-19 2022-12-31 13F ABBOTT LABS COM Stock 002824100 2,251 -75 -3.22 247 9.78 0.0837
2022-10-21 2022-09-30 13F ABBOTT LABS COM Stock 002824100 2,326 -40 -1.69 225 -13.79 0.0870
2022-07-15 2022-06-30 13F ABBOTT LABS COM Stock 002824100 2,366 107 4.74 261 -2.25 0.0984
2022-04-14 2022-03-31 13F ABBOTT LABS COM Stock 002824100 2,259 258 12.89 267 -5.32 0.0934
2022-01-20 2021-12-31 13F ABBOTT LABS COM 002824100 2,001 -49 -2.39 282 16.53 0.1004
2021-10-12 2021-09-30 13F ABBOTT LABS COM 002824100 2,050 409 24.92 242 27.37 0.0956
2021-07-26 2021-06-30 13F ABBOTT LABS COM 002824100 1,641 0 0.00 190 -3.55 0.0989
2021-04-30 2021-03-31 13F ABBOTT LABS COM 002824100 1,641 -335 -16.95 197 -8.80 0.1124
2021-02-03 2020-12-31 13F ABBOTT LABS COM 002824100 1,976 0 0.00 216 0.47 0.1348
2020-10-16 2020-09-30 13F ABBOTT LABS COM 002824100 1,976 0 0.00 215 18.78 0.1579
2020-08-04 2020-06-30 13F ABBOTT LABS COM 002824100 1,976 170 9.41 181 26.57 0.1442
2020-05-14 2020-03-31 13F ABBOTT LABS COM 002824100 1,806 1,806 143 0.1422
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.