Whale Analyzer
ZTS Institutional Holders and 13F Ownership
Compare 10 tracked holders of ZTS, their reported positions and disclosed changes. Coverage is limited to the investors tracked by Whale Analyzer; these records do not establish all shareholders or current trades. Available original SEC filings for tracked 13F holders are linked below. Top tracked holders include Ruane, Cunniff & Goldfarb, Capital Research Global Investors, National Pension Service, and Tweedy Browne.
Continue to the live ZTS dashboardTop holders
| Investor | Reported value | Shares | Change | Report date |
|---|---|---|---|---|
| Ruane, Cunniff & Goldfarb 13F holdings | $169.1M | 2.4M | Reduced | 2026-06-30 |
| Capital Research Global Investors 13F holdings | $70.5M | 980.8K | Reduced | 2026-06-30 |
| National Pension Service 13F holdings | $60.4M | 839.9K | Increased | 2026-06-30 |
| Tweedy Browne 13F holdings | $40.0M | 556.1K | New | 2026-06-30 |
| Mairs & Power Funds 13F holdings | $33.6M | 467.5K | Increased | 2026-06-30 |
| Markel Group 13F holdings | $29.7M | 425.3K | Increased | 2026-09-30 |
| Polen Capital Management 13F holdings | $23.0M | 320.4K | Reduced | 2026-06-30 |
| Baillie Gifford & Co 13F holdings | $10.0M | 138.6K | Reduced | 2026-06-30 |
| Bridgewater Associates 13F holdings | $9.6M | 134.2K | Increased | 2026-06-30 |
| Soros Fund Management 13F holdings | $2.0M | 27.8K | New | 2026-06-30 |
Original SEC filing sources
These recorded filings support the tracked 13F rows included in the aggregate reported values on this page. See each holder profile for source coverage and context for other disclosure types.
- Ruane, Cunniff & Goldfarb SEC filing (0000919574-26-005176) · report date 2026-06-30
- Capital Research Global Investors SEC filing (0001422848-26-000094) · report date 2026-06-30
- National Pension Service SEC filing (0001193125-26-347818) · report date 2026-06-30
- Tweedy Browne SEC filing (0001193125-26-340443) · report date 2026-06-30
- Mairs & Power Funds SEC filing (0001172661-26-003496) · report date 2026-06-30
- Markel Group SEC filing (0001096343-26-000085) · report date 2026-09-30
- Polen Capital Management SEC filing (0001172661-26-003035) · report date 2026-06-30
- Baillie Gifford & Co SEC filing (0001088875-26-000057) · report date 2026-06-30
- Bridgewater Associates SEC filing (0001350694-26-000003) · report date 2026-06-30
- Soros Fund Management SEC filing (0000902664-26-003507) · report date 2026-06-30
Tracked-sample concentration
Reported position value for ZTS is highly concentrated within this tracked-holder sample. These percentages are not market-wide ownership shares.
- Largest tracked holder: 37.8% of aggregate reported value in this sample
- Top 5 tracked holders: 83.4% of aggregate reported value in this sample
- Top 10 tracked holders: 100.0% of aggregate reported value in this sample
Whale activity this quarter
Across 10 tracked holders, 6 increased, 4 reduced. Net positioning is net buying.
- Ruane, Cunniff & Goldfarb ($169.1M) (▼ 3.0% qoq shares) · modeled avg cost estimate $118.22
- Capital Research Global Investors ($70.5M) (▼ 30.4% qoq shares)
- National Pension Service ($60.4M) (▲ 9.6% qoq shares) · modeled avg cost estimate $92.42
- Mairs & Power Funds ($33.6M) (▲ 54.2% qoq shares)
- Markel Group ($29.7M) (▲ 542.5% qoq shares) · modeled avg cost estimate $70.15
- Polen Capital Management ($23.0M) (▼ 92.4% qoq shares)
- Baillie Gifford & Co ($10.0M) (▼ 14.5% qoq shares) · modeled avg cost estimate $126.55
- Bridgewater Associates ($9.6M) (▲ 164.5% qoq shares) · modeled avg cost estimate $74.29
Modeled cost estimate vs current price
The share-weighted modeled cost estimate across 5 covered tracked holders is $106.18 versus a current price of $79.40, so ZTS trades below that estimate (-25.2%). This model does not establish any filer's actual purchase price, unrealized gain, or investment return.
Sector positioning — Health Care
ZTS sits within the Health Care sector alongside 253 other tracked names. Compare reported positions across tracked peers:
How to use this page
Values are reported public positions from tracked 13F filers and disclosures — not real-time or market-wide ownership totals. Open the live ZTS dashboard for price charts and cross-investor scans, or read the SEC 13F guide.
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Learn more in Whale Analyzer Academy
Deepen your read on ZTS with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns ZTS stock?
Whale Analyzer tracks 10 public-disclosure holders of ZTS with a combined reported value of $447.8M. See the holder table above for the largest tracked positions.
Which top funds are buying ZTS?
Tracked holders were net buying last quarter — 6 increased, 4 reduced. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is the tracked ZTS sample?
The top five tracked holders account for 83.4% of aggregate reported value in this tracked sample. This is not a market-wide ownership percentage.
How does ZTS compare with the modeled cost estimate?
The share-weighted modeled cost estimate across 5 covered tracked holders is $106.18 versus a current price of $79.40 (-25.2%). It is not an actual purchase price, unrealized gain, or investment return.
What does 13F ownership mean for ZTS?
These are historical reported positions from tracked filers, not real-time ownership or a complete shareholder register. Use the interactive ZTS dashboard to explore them, or read our 13F Alpha Signals Guide.