Institutional filer · SEC 13F · Q1 2024
Boston Partners
The reported 13F portfolio of Boston Partners (CIK 1386060) - top holdings, how concentrated the book is, and what changed last quarter.
- $24.7B
- Reported book
- 766
- Positions
- #10
- of 360 filers
The verdict
According to SEC Form 13F-HR filings in this corpus, Boston Partners ranks #10 of 360 institutional filers by reported book value (largest first), matching the /funds listing. As of Q1 2024 the reported book is $24.7B across 766 positions, a broadly diversified portfolio.
- $24.7B
- reported 13F value
- 766
- disclosed positions
- 2.9%
- in HOWMET AEROSPACE INC
- #10
- of 360 filers
Top-5 share 13.5% → SPREAD book (largest five positions vs the rest of the reported 13F book).
According to SEC Form 13F-HR filings in this corpus, Boston Partners ranks #10 of 360 institutional filers by reported book value (largest first), matching the /funds listing.
Where Boston Partners sits by disclosed position count
Boston Partners reports 766 13F positions among 360 filers with holdings (inventory signal, not a quality ranking). Orthogonal to book-value rank.
Boston Partners vs all filers by holding count
Where this filer's disclosed position inventory sits among every tracked 13F manager
766 36th of 360 higher than 324 of 360 filers
Filers, banded by disclosed position count
Each bar is a band; taller bars hold more filers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source SEC Form 13F-HR filings · 2026-05-16
Concentration vs. book size among peer filers
Boston Partners reports a book ($24.71B) concentrated across only 766 disclosed positions -- fewer than the 1,922-position median among similarly sized filers.
Reported book value vs. disclosed position count
How 13F filings are computed · All institutional filers · Largest filers by value
SEC Form 13F-HR filing desk
CIK 1386060 · Q1 2024 $24.7B book
BOOK-MEGA · POS-MID · CONC-BROAD · LEAD-MIX · NEAR-PEER · TREND-FLAT · FY-SNAPSHOT
- BOOK-MEGA #10/360
- POS-MID 766 names
- CONC-BROAD 14% top-5
- LEAD-MIX 2.9% top
- NEAR-PEER STRS OHIO
- TREND-FLAT Book steady
- FY-SNAPSHOT Q1 2024
Photo-finish peer on reported book: STRS OHIO
Read with: Institutional investor types - Manager type shapes what a 13F book represents — RIAs, hedge funds, and banks file the same form differently.
Reported-book neighbourhood · Boston Partners
Nearest tracked filers by aggregate 13F reported book, not a full corpus reprint.
How the reported book breaks down
$24.7B decomposed into the top 5 reported positions (shown below) versus every other disclosed position.
Top Reported Holdings
| # | Security | Value | % of book |
|---|---|---|---|
| 1 | HOWMET AEROSPACE INC | $712.4M | 2.9% |
| 2 | US FOODS HLDG CORP | $693.3M | 2.8% |
| 3 | AMERIPRISE FINL INC | $660.8M | 2.7% |
| 4 | HUNTINGTON BANCSHARES INC | $641.4M | 2.6% |
| 5 | NORFOLK SOUTHN CORP | $634.5M | 2.6% |
| 6 | AVANTOR INC | $588.5M | 2.4% |
| 7 | MORGAN STANLEY | $501.9M | 2.0% |
| 8 | WELLS FARGO CO NEW | $490.9M | 2.0% |
| 9 | DOVER CORP | $487.5M | 2.0% |
| 10 | GLOBAL PMTS INC | $455.9M | 1.9% |
| 11 | COGNIZANT TECHNOLOGY SOLUTIO | $440.9M | 1.8% |
| 12 | DISCOVER FINL SVCS | $404.6M | 1.6% |
| 13 | MCKESSON CORP | $402.5M | 1.6% |
| 14 | EVEREST GROUP LTD | $392.7M | 1.6% |
| 15 | GENERAL DYNAMICS CORP | $371.9M | 1.5% |
| 16 | HALLIBURTON CO | $360.5M | 1.5% |
| 17 | GOLDMAN SACHS GROUP INC | $355.7M | 1.4% |
| 18 | GALLAGHER ARTHUR J & CO | $339.1M | 1.4% |
| 19 | ZIMMER BIOMET HOLDINGS INC | $339.1M | 1.4% |
| 20 | UNITED RENTALS INC | $333.4M | 1.4% |
| 21 | MOLINA HEALTHCARE INC | $319.4M | 1.3% |
| 22 | T-MOBILE US INC | $314.4M | 1.3% |
| 23 | WEATHERFORD INTL PLC | $301.9M | 1.2% |
| 24 | FERGUSON PLC NEW | $286.2M | 1.2% |
| 25 | BOOKING HOLDINGS INC | $285.2M | 1.1% |
Frequently Asked Questions
- How big is Boston Partners's 13F portfolio?
- Boston Partners reports $24.7B of long US-equity positions across 766 securities as of Q1 2024. This reflects 13F-disclosed holdings only, it is not the firm's total assets under management.
- Where does Boston Partners sit among tracked 13F filers?
- According to SEC Form 13F-HR filings in this corpus, Boston Partners ranks #10 of 360 institutional filers by reported book value (largest first), matching the /funds listing. The ordinal is recomputed live from filers with reported book value > 0. See /methodology/#corpus-placement.
- What is Boston Partners's largest position?
- Boston Partners's largest reported position is HOWMET AEROSPACE INC at $712.4M, about 2.9% of its reported book as of Q1 2024.
Nationwide filers with similar book size or holding count
Two 13F-derived peer sets for Boston Partners: nearest reported book value and nearest holding inventory, not catalog browse links.
Similar reported book
Nearest filers by reported long-equity book ($24.7B here).
Similar holding count
Nearest filers by number of disclosed positions (766 here).
Using this filing
- The rankings sort every tracked filer the same way Boston Partners was placed above, so you can see exactly how the rest of the field compares. View the rankings
- STRS OHIO reported the nearest book value ($23.9B) this quarter, a useful scale comparison for Boston Partners. Compare filers
- 13F-HR reports long US-listed equity positions only, not total AUM, short positions, or non-equity holdings, treat the reported book as a partial picture. Read the methodology
Form 13F-HR discloses long US-listed equity positions of managers with $100M+ qualifying assets, filed within 45 days of period end. Reported value is not total AUM.
Source: U.S. Securities and Exchange Commission (SEC) - EDGAR Form 13F-HR institutional holdings filings · Q1 2024 13F-HR discloses long US-listed equity positions of managers with $100M+ qualifying assets, filed within 45 days of period end. Reported value is not total AUM.
PlainFundData is rendered directly from SEC EDGAR Form 13F-HR institutional holdings filings, no number is typed in by an editor. Filer holdings, changes, and reported book on this page are aggregated live from those 13F-HR extracts. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-05-16.