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MRK in the 13F filings

Merck & Co Inc · CUSIP 58933Y105

Sector · Pharmaceuticals and biotechnologyTheme · Healthcare: biopharma and medtech· L3VLUP-definedTheme · Pharmaceutical preparations
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023
Quarter end
30 Jun 2024
the date the book describes
Filed
5 Nov 2026
latest of these filings; the earliest 6 Aug 2024
Managers listing it
38
at least, of 95 tracked, among listed positions
Comparable managers
94
filed both Q1 2024 and Q2 2024; 34 listed it in both
Shares listed
266,388,281
combined, among listed positions
Reported value
$33.0bn
combined, at the quarter end

Among the 94 comparable managers: 21 buyers (opened or added shares) and 18 sellers (trimmed or exited), at least, among listed positions. Their net change in shares is not known from listed positions, because at least one of them lists it in only one of the two quarters.

Managers listing MRK in Q2 2024

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2024, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

38 of 38 holders

ActionFiling
Wellington Management Group LLP72,481,979$9.0bn1.60%Trimmed-13,866,28014 Aug 2024 (the filing on sec.gov)
Fidelity (FMR LLC)50,653,254$6.3bn0.40%Trimmed-1,517,6655 Nov 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc24,725,061$3.1bn0.37%Trimmed-4,914,45614 Aug 2024 (the filing on sec.gov)
Invesco Ltd15,796,361$2.0bn0.41%Trimmed-262,17813 Aug 2024 (the filing on sec.gov)
Capital World Investors15,271,723$1.9bn0.31%Added+1,317,70613 Aug 2024 (the filing on sec.gov)
AllianceBernstein LP11,331,807$1.4bn0.49%Added+145,04514 Aug 2024 (the filing on sec.gov)
Janus Henderson Group Ltd10,690,678$1.3bn0.71%Added+229,51414 Aug 2024 (the filing on sec.gov)
MFS Investment Management9,672,022$1.2bn0.37%Trimmed-1,213,4139 Aug 2024 (the filing on sec.gov)
Millennium Management LLC9,585,179$1.2bn0.55%Trimmed-484,27314 Aug 2024 (the filing on sec.gov)
Citadel Advisors LLC8,242,067$1.0bn0.21%Added+666,84714 Aug 2024 (the filing on sec.gov)
Arrowstreet Capital LP6,207,199$768m0.68%Added+1,459,49114 Aug 2024 (the filing on sec.gov)
Neuberger Berman Group LLC5,102,072$632m0.52%Trimmed-422,23514 Nov 2024 (the filing on sec.gov)
Marshall Wace LLP2,584,183$320m0.43%Added+634,19414 Aug 2024 (the filing on sec.gov)
Holocene Advisors LP2,486,403$308m1.29%Addedn.a.14 Aug 2024 (the filing on sec.gov)
Jane Street Group LLC2,434,424$301m0.07%Added+841,95915 Aug 2024 (the filing on sec.gov)
D. E. Shaw & Co.2,378,778$294m0.28%Added+357,36314 Aug 2024 (the filing on sec.gov)
AQR Capital Management LLC2,211,270$274m0.42%Trimmed-26,99014 Aug 2024 (the filing on sec.gov)
Capital Research Global Investors2,041,274$253m0.06%Trimmed-18413 Aug 2024 (the filing on sec.gov)
Man Group PLC1,935,509$240m0.61%Trimmed-19,11414 Aug 2024 (the filing on sec.gov)
Bridgewater Associates LP1,801,991$223m1.16%Trimmed-288,26514 Aug 2024 (the filing on sec.gov)
Two Sigma Advisers LP1,653,300$205m0.46%Trimmed-432,30014 Aug 2024 (the filing on sec.gov)
Two Sigma Investments LP1,483,102$184m0.42%Added+871,69914 Aug 2024 (the filing on sec.gov)
Voloridge Investment Management LLC1,133,907$140m0.52%Addedn.a.14 Aug 2024 (the filing on sec.gov)
Squarepoint Ops LLC869,921$108m0.18%Added+430,97114 Aug 2024 (the filing on sec.gov)
Woodline Partners LP711,353$88m0.84%Trimmed-264,66414 Aug 2024 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q1 2024 to Q2 2024, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (1)

Exited (1)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
38 in Q3 2024 to 25 in Q2 2026

Tracked managers listing it, at least.

02040602014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
MRK by quarter
QuarterHoldersReported valueBuyersSellers
Q2 201323$25.9bnn.a.n.a.
Q3 201324$25.4bnn.a.n.a.
Q4 201323$27.1bnn.a.n.a.
Q1 201424$31.2bnn.a.n.a.
Q2 201428$30.6bnn.a.n.a.
Q3 201432$30.5bnn.a.n.a.
Q4 201430$28.6bnn.a.n.a.
Q1 201529$28.8bnn.a.n.a.
Q2 201529$27.1bnn.a.n.a.
Q3 201525$23.0bnn.a.n.a.
Q4 201528$23.9bnn.a.n.a.
Q1 201628$23.8bnn.a.n.a.
Q2 201627$25.9bnn.a.n.a.
Q3 201627$27.5bnn.a.n.a.
Q4 201626$24.4bnn.a.n.a.
Q1 201731$24.7bnn.a.n.a.
Q2 201734$24.0bnn.a.n.a.
Q3 201731$23.7bnn.a.n.a.
Q4 201732$20.0bnn.a.n.a.
Q1 201830$17.5bnn.a.n.a.
Q2 201827$19.3bnn.a.n.a.
Q3 201827$22.9bnn.a.n.a.
Q4 201826$24.4bnn.a.n.a.
Q1 201926$24.4bnn.a.n.a.
Q2 201928$23.3bnn.a.n.a.
Q3 201931$23.2bnn.a.n.a.
Q4 201934$24.0bnn.a.n.a.
Q1 202033$18.5bnn.a.n.a.
Q2 202034$18.6bnn.a.n.a.
Q3 202035$20.2bnn.a.n.a.
Q4 202034$19.1bnn.a.n.a.
Q1 202133$16.6bnn.a.n.a.
Q2 202131$15.1bnn.a.n.a.
Q3 202131$15.2bnn.a.n.a.
Q4 202126$15.0bnn.a.n.a.
Q1 202234$17.4bnn.a.n.a.
Q2 202234$19.0bnn.a.n.a.
Q3 202235$17.2bnn.a.n.a.
Q4 202235$25.2bnn.a.n.a.
Q1 202333$26.6bnn.a.n.a.
Q2 202334$30.1bnn.a.n.a.
Q3 202339$26.7bnn.a.n.a.
Q4 202341$29.3bn2220
Q1 202437$37.1bn2119
Q2 202438$33.0bn2118
Q3 202438$29.1bn2317
Q4 202435$23.7bn1819
Q1 202536$20.8bn2018
Q2 202531$18.5bn1813
Q3 202536$19.0bn1818
Q4 202532$26.8bn2519
Q1 202630$28.9bn1327
Q2 202625$29.2bn1424

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

MRK and LLY →MRK and JNJ →MRK and VRTX →Choose a stock to compare with MRK →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own MRK, latest filings →Back to the 13F Explorer →