UNION PACIFIC (UNP) Institutional Ownership & Top Holders
The most recent SEC Form 13F filings (Q2 2026) show 22 hedge funds and institutional investors holding a combined 12.9M shares of UNION PACIFIC (UNP), valued at $3.5B. The median portfolio weight is 1.7%.
Quarterly institutional ownership changes in UNP show net buying, with the combined position increasing by 3.2M shares (32.7%) from the previous quarter.
Among 13F filers, the funds with the highest portfolio allocation to UNP are Slate Path Capital (8.7% of its 13F portfolio), RDST Capital (7.4%), and Palestra (7.0%). In Q2 2026, Slate Path Capital made the largest position increase (+6.0%), while Harvard Management Company made the largest reduction (-8.5%).
Top 10 Institutional Holders in UNION PACIFIC (UNP), Ranked by Portfolio Weight
Based on the latest SEC Form 13F filings (Q2 2026).
| # | Fund | Shares | Market Value | Portfolio Weight |
|---|---|---|---|---|
| 1 | Slate Path Capital | 2,302,604 | $626.3M | 8.7% |
| 2 | RDST Capital | 328,055 | $89.2M | 7.4% |
| 3 | Palestra | 762,465 | $207.4M | 7.0% |
| 4 | PARK PRESIDIO CAPITAL | 398,803 | $108.5M | 6.1% |
| 5 | Baupost Group | 1,185,395 | $322.4M | 6.0% |
| 6 | Night Owl Capital Management | 189,178 | $51.5M | 5.4% |
| 7 | Avantyr Capital Partners | 455,085 | $123.8M | 4.6% |
| 8 | Dendur Capital | 186,000 | $50.6M | 3.0% |
| 9 | Corvex Management | 326,330 | $88.8M | 2.8% |
| 10 | Third Point | 350,000 | $95.2M | 2.0% |
- 22Institutional investors
- 12,872,039Shares held (disclosed)
- $3.5B13F market value
- 1.7%Median portfolio weight
Ownership History
Quarter-by-quarter share count, market value, and portfolio conviction weight (up to 5 of the heaviest weight-by-portfolio funds) of UNP. Sourced from 13F filings; reflects long equity positions only.
Quarter-over-Quarter ActivityQ2 2026
The biggest weight-increase and weight-decrease changes among funds that hold UNP. Deltas compare the selected filing to the previous reporting quarter.
Top buyers
- Slate Path Capital+6.0% · +1,569,800 shares
- PARK PRESIDIO CAPITAL+2.2% · +169,316 shares
- Ripple Effect Asset Management+1.8% · +11,500 shares
Top sellers
- Harvard Management Company-8.5% · -634,376 shares
- Corvex Management-1.9% · -158,000 shares
- Soros Capital Management-1.5% · -8,640 shares
Ownership Statistics
- Funds holding
- 22
- Median weight
- 1.7%
- Largest holder
- Slate Path Capital · 8.7%
- Smallest holder
- Greenhaven Associates · 0.0%
- Shares held
- 12,872,039 (+3,172,968)
All Institutional HoldersSortable · searchable
All institutional investors (Max 50) holding UNP in the selected quarter. Click a fund name to drill into its full 13F portfolio.
| 1 | Slate Path Capital | 2,302,604 | $626.3M | 8.7% |
| 2 | RDST Capital | 328,055 | $89.2M | 7.4% |
| 3 | Palestra | 762,465 | $207.4M | 7.0% |
| 4 | PARK PRESIDIO CAPITAL | 398,803 | $108.5M | 6.1% |
| 5 | Baupost Group | 1,185,395 | $322.4M | 6.0% |
| 6 | Night Owl Capital Management | 189,178 | $51.5M | 5.4% |
| 7 | Avantyr Capital Partners | 455,085 | $123.8M | 4.6% |
| 8 | Dendur Capital | 186,000 | $50.6M | 3.0% |
| 9 | Corvex Management | 326,330 | $88.8M | 2.8% |
| 10 | Third Point | 350,000 | $95.2M | 2.0% |
| 11 | Ripple Effect Asset Management | 11,500 | $3.1M | 1.8% |
| 12 | Viking Global | 2,047,332 | $556.9M | 1.6% |
| 13 | Harris Associates | 3,844,522 | $1.0B | 1.4% |
| 14 | Soros Capital Management | 9,555 | $2.6M | 0.5% |
| 15 | Tweedy Browne | 19,185 | $5.2M | 0.4% |
| 16 | Markel Group | 161,028 | $43.8M | 0.3% |
| 17 | Gardner Russo & Quinn | 25,841 | $7.0M | 0.1% |
| 18 | UTIMCO - The University of Texas | 1,962 | $533.7K | 0.1% |
| 19 | Dodge & Cox | 260,902 | $71.0M | 0.0% |
| 20 | Torray Investment Partners | 850 | $231.2K | 0.0% |
| 21 | Mairs & Power | 3,415 | $928.9K | 0.0% |
| 22 | Greenhaven Associates | 2,032 | $552.7K | 0.0% |
Institutional Investor Count Over Time
Number of institutional investors disclosing a long position in UNION PACIFIC CORP. (UNP) each reporting quarter. Sourced from SEC Form 13F-HR filings.
See UNION PACIFIC CORP. (UNP) insider transactions (SEC Form 4) →
Methodology & FAQ
Methodology: How We Track UNP Institutional Holdings
Our data is systematically aggregated directly from quarterly Form 13F-HR disclosures submitted to the U.S. Securities and Exchange Commission (SEC).
- Who must file: This dataset includes filings from U.S. institutional investment managers, hedge funds, mutual funds, university endowments, and family offices managing at least $100 million in Section 13(f) securities (including equities, options, convertibles, ETFs, and warrants).
- What is included: We capture long positions in Section 13(f) securities for UNION PACIFIC CORP. (UNP). By SEC regulation, 13F filings do not require the disclosure of short positions, non-U.S. holdings, or OTC derivatives. Listed options are excluded from portfolio weight calculations to ensure comparability across filers.
- Metric definition: “Portfolio Weight” shows how much of a fund's total reported 13F portfolio value (excluding listed options) is allocated to UNP on the specific reporting date.
- How to use this data: Quarter-over-quarter changes in shares and portfolio weight reflect a combination of active trading and market price movements. These are descriptive metrics of fund allocation, not explicit buy or sell signals.
How do you measure hedge fund conviction and institutional concentration in UNP?
We evaluate fund conviction by looking at portfolio weight rather than just absolute share count. By tracking how the largest holders , such as Slate Path Capital , RDST Capital , and Palestra as of Q2 2026, change their position sizing quarter-over-quarter, we help investors distinguish between deliberate position sizing changes and passive mark-to-market drift.
Does the UNP ownership data include short interest or options?
SEC Form 13F mandates the disclosure of long positions in Section 13(f) securities, which includes equities and listed options (put and call contracts), but excludes short interest, swaps, and OTC derivatives by regulatory design. On this platform, listed options are excluded from portfolio weight calculations to ensure comparability across filers.
Are family offices and university endowments included in this UNP data?
Yes. In addition to traditional hedge funds and large asset managers, any institutional entity exercising investment discretion over at least $100 million in Section 13(f) securities must file a Form 13F. This explicitly includes single-family offices and university endowments. If a qualifying family office or endowment holds UNP stock, their allocation is systematically aggregated alongside traditional fund data.
When is the institutional ownership data updated, and is there a reporting lag?
Institutional investment managers are required to file their Form 13F within 45 days after the end of a calendar quarter (the standard “T+45” window). Our platform re-ingests new filings from the SEC EDGAR database on a nightly cycle, typically within 24–48 hours of publication, providing a point-in-time snapshot of reported consensus positioning for UNP as of each filing date.