ISHARES RUSSELL 1000 GROWTH (IWF) Institutional Buying Activity
Institutional investors tracked by InsiderSet increased exposure to ISHARES RUSSELL 1000 GROWTH (IWF) during the quarter ended March 31, 2026 through a combination of new purchases and expanded existing positions disclosed in SEC Form 13F filings.
The largest institutional buyer of IWF during the latest reporting period was Polen Capital Management, which increased its reported IWF position by approximately $417.14M based on quarter-end filing values. Several additional hedge funds and long-term asset managers also reported meaningful increases in IWF exposure during the quarter.
Institutional buying activity can provide insight into investor conviction, sector allocation trends, and smart money positioning toward ISHARES RUSSELL 1000 GROWTH (IWF). InsiderSet tracks quarterly accumulation trends, new institutional positions, ownership increases, and estimated performance of newly disclosed holdings using SEC filing data and recent market prices.
The investors highlighted on this page collectively added approximately $1.02B in reported IWF exposure during the latest filing period, reflecting continued institutional interest in ISHARES RUSSELL 1000 GROWTH's growth initiatives and strategic positioning.
| Portfolio quarter | Name | Type | Quantity | Remaining | Reported stock balance |
|---|---|---|---|---|---|
| Q1 2026 | Renaissance Technologies LLC | Buy | 50,480 | 62,280 | $26,556,192 |
| Q1 2026 | Matrix Advisors Value Fund | Buy | 2,569 | 26,756 | $11,408,712 |
| Q1 2026 | Sequoia Financial Advisors | Buy | 955 | 29,116 | $12,414,968 |
| Q4 2025 | Polen Capital Management | Buy | 548,235 | 776,086 | $367,321,352 |
| Q4 2025 | Renaissance Technologies LLC | Buy | 8,200 | 11,800 | $5,584,940 |
| Q4 2025 | Sequoia Financial Advisors | Buy | 6,291 | 28,161 | $13,328,649 |
| Q4 2025 | Wedgewood Partners | Buy | 4,431 | 12,019 | $5,688,621 |
| Q4 2025 | Torray Fund | Buy | 855 | 1,993 | $943,287 |
| Q4 2025 | Matrix Advisors Value Fund | Buy | 829 | 24,187 | $11,447,926 |
| Q4 2025 | ARK Invest | Buy | 496 | 1,219 | $576,721 |
| Q3 2025 | Mairs & Power Growth Fund | Buy | 2,426 | 4,172 | $222,495 |
| Q3 2025 | Polen Capital Management | Buy | 2,242 | 227,851 | $106,727,454 |
| Q3 2025 | Renaissance Technologies LLC | Buy | 1,900 | 3,600 | $1,686,276 |
| Q3 2025 | Matrix Advisors Value Fund | Buy | 363 | 23,358 | $10,941,526 |
| Q3 2025 | ARK Invest | Buy | 13 | 723 | $338,557 |
| Q2 2025 | Matrix Advisors Value Fund | Buy | 2,145 | 22,995 | $9,763,384 |
| Q2 2025 | ARK Invest | Buy | 658 | 710 | $301,626 |
| Q1 2025 | Wedgewood Partners | Buy | 3,714 | 7,588 | $3,032,317 |
| Q1 2025 | Sequoia Financial Advisors | Buy | 2,932 | 23,502 | $8,486,277 |
| Q1 2025 | Matrix Advisors Value Fund | Buy | 743 | 20,850 | $7,529,030 |
| Q4 2024 | Polen Capital Management | Buy | 341,413 | 503,619 | $202,243,438 |
| Q4 2024 | Renaissance Technologies LLC | Buy | 14,600 | 17,500 | $7,027,650 |
| Q4 2024 | Sequoia Financial Advisors | Buy | 3,970 | 20,570 | $8,260,550 |
| Q4 2024 | Wedgewood Partners | Buy | 2,535 | 3,874 | $1,555,721 |
| Q4 2024 | Matrix Advisors Value Fund | Buy | 695 | 20,107 | $8,074,618 |
| Q4 2024 | ARK Invest | Buy | 349 | 381 | $152,866 |
| Q3 2024 | Matrix Advisors Value Fund | Buy | 2,090 | 19,412 | $7,287,014 |
| Q3 2024 | Sequoia Financial Advisors | Buy | 1,424 | 16,600 | $6,231,170 |
| Q3 2024 | Matrix Private Capital Group | Buy | 1 | 5,151 | $1,933,540 |
| Q2 2024 | Polen Capital Management | Buy | 222,017 | 297,803 | $108,552,096 |
Frequently asked questions about IWF activity
Which institutional owners are buying IWF?
Institutional owners buying IWF include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in IWF activity?
"Buy" means an investor increased their reported position in IWF compared to the prior reporting period. This reflects growing exposure to ISHARES RUSSELL 1000 GROWTH (IWF) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in IWF increasing?
Institutional interest in IWF can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.