ARIEL INVESTMENTS, LLC — AFFILIATED MANAGERS GROUP AMG: Quarterly 13F Position History
ARIEL INVESTMENTS, LLC has reported AFFILIATED MANAGERS GROUP (AMG) on 31 13F-HR filings in Pactolio's tracked window, first appearing in Q3 2018. As of Q1 2026, the position is sized at 2,128,060 shares ($588.8M market value, 3.30% of the equity book). Quarter-over-quarter share count change: 236,386 (-10.0%) .
- 2,128,060Shares Held (Latest Filing)
- $588.8MReported Market Value (Latest Filing)
- 3.30%Portfolio Weight (% of 13F Equity Book)
- 236,386Quarter-over-Quarter Share Change
- -$92.8MQuarter-over-Quarter Value Change
- 2,904,322Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 31 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 2,128,060 | 236,386 | -10.0% | $588.8M | 3.30% | $276.70 |
| Q4 2025 | 2,364,446 | 163,202 | -6.5% | $681.6M | 3.68% | $288.28 |
| Q3 2025 | 2,527,648 | 182,502 | -6.7% | $602.7M | 3.22% | $238.43 |
| Q2 2025 | 2,710,150 | 104,152 | -3.7% | $533.3M | 3.02% | $196.77 |
| Q1 2025 | 2,814,302 | 33,552 | -1.2% | $472.9M | 2.78% | $168.03 |
| Q4 2024 | 2,847,854 | 56,468 | -1.9% | $526.6M | 2.81% | $184.92 |
| Q3 2024 | 2,904,322 | +18,688 | +0.6% | $516.4M | 2.64% | $177.80 |
| Q2 2024 | 2,885,634 | +231,616 | +8.7% | $450.8M | 2.44% | $156.23 |
| Q1 2024 | 2,654,018 | +168,626 | +6.8% | $444.5M | 2.19% | $167.47 |
| Q4 2023 | 2,485,392 | +109,100 | +4.6% | $376.3M | 1.87% | $151.42 |
| Q3 2023 | 2,376,292 | +241,954 | +11.3% | $309.7M | 1.64% | $130.34 |
| Q2 2023 | 2,134,338 | 49,982 | -2.3% | $319.9M | 1.51% | $149.89 |
| Q1 2023 | 2,184,320 | 72,294 | -3.2% | $311.1M | 1.49% | $142.42 |
| Q4 2022 | 2,256,614 | 33,894 | -1.5% | $357.5M | 1.81% | $158.43 |
| Q3 2022 | 2,290,508 | +70,608 | +3.2% | $256.2M | 1.41% | $111.85 |
| Q2 2022 | 2,219,900 | +345,452 | +18.4% | $258.8M | 1.29% | $116.60 |
| Q1 2022 | 1,874,448 | +79,152 | +4.4% | $264.2M | 1.17% | $140.95 |
| Q4 2021 | 1,795,296 | +109,678 | +6.5% | $295.3M | 1.24% | $164.51 |
| Q3 2021 | 1,685,618 | +30,660 | +1.9% | $254.7M | 1.16% | $151.09 |
| Q2 2021 | 1,654,958 | +3,752 | +0.2% | $255.2M | 1.20% | $154.21 |
| Q1 2021 | 1,651,206 | +68,298 | +4.3% | $246.1M | 1.21% | $149.03 |
| Q4 2020 | 1,582,908 | +84,066 | +5.6% | $161.0M | 0.91% | $101.70 |
| Q3 2020 | 1,498,842 | +264 | +0.0% | $102.5M | 0.74% | $68.38 |
| Q2 2020 | 1,498,578 | +180,270 | +13.7% | $111.7M | 0.85% | $74.56 |
| Q1 2020 | 1,318,308 | +132,912 | +11.2% | $78.0M | 0.68% | $59.14 |
| Q4 2019 | 1,185,396 | +11,950 | +1.0% | $100.5M | 0.63% | $84.74 |
| Q3 2019 | 1,173,446 | +258,340 | +28.2% | $97.8M | 0.65% | $83.35 |
| Q2 2019 | 915,106 | +104,278 | +12.9% | $84.3M | 0.53% | $92.14 |
| Q1 2019 | 810,828 | +4,778 | +0.6% | $86.8M | 0.54% | $107.11 |
| Q4 2018 | 806,050 | +270,256 | +50.4% | $78.5M | 0.55% | $97.44 |
| Q3 2018 | 535,794 | — | — | $73.3M | 0.41% | $136.72 |
Methodology & FAQ
How This Position History Is Sourced
Each row is one SEC Form 13F-HR filing disclosing this position. Share count, market value, and reported quarter are taken verbatim from the filing; portfolio weight is recomputed against the same filing's total reported equity book. Implied price-per-share is market value divided by shares — a quarter-end mark, not the manager's cost basis. See the full methodology document for the normalization rules.
When did ARIEL INVESTMENTS, LLC first disclose a AMG position in 13F-HR filings?
ARIEL INVESTMENTS, LLC first reported AFFILIATED MANAGERS GROUP (AMG) on its 13F-HR filing for the period ending 2018-09-30 (Q3 2018). The position has appeared on 31 reported quarters within Pactolio's tracked window.
What was ARIEL INVESTMENTS, LLC's most recent quarter-over-quarter share-count change in AMG?
Between Q4 2025 and Q1 2026, ARIEL INVESTMENTS, LLC reduced its AMG position by 236,386 shares (-10.0%), leaving 2,128,060 shares at a market value of $588.8M.
Does the implied price-per-share represent ARIEL INVESTMENTS, LLC's cost basis in AMG?
No. The implied price-per-share column is the 13F-HR reported market value divided by reported share count on the filing date (end of quarter). It is a quarter-end mark, not a cost basis or transaction price. Use it as a sanity check on the value column, not as an indicator of the manager's entry or exit price.