AMG
Affiliated Managers Group, Inc
Affiliated Managers Group, Inc historical holders
total: 5
Longleaf Partners Affiliated Managers Group, Inc transactions over time
- Total transactions:
- 8
- New positions:
- 1
- Sold out:
- 1
- Added:
- 1
- Reduced:
- 5
- Held since:
- 2019 Q3
- Held for:
- 23 quarters
- Latest activity:
- 2025 Q2
Mason Hawkins has been an institutional investor in Affiliated Managers Group, Inc (AMG) since 2019 Q3. According to 2026 Q1 report, Mason Hawkins doesn't hold any shares. The fund/company first acquired AMG in 2019 Q3, initially purchasing 975,850 shares. Since the initial investment, Longleaf Partners has made 7 more transactions in this position.
When did Mason Hawkins exit their AMG position?
Mason Hawkins no longer holds Affiliated Managers Group, Inc (AMG). They sold off their entire position in 2025 Q2, closing out an investment that began in 2019 Q3.
When did Mason Hawkins first invest in AMG?
Mason Hawkins first invested in Affiliated Managers Group, Inc (AMG) in 2019 Q3 at the reported quarter-end price of $83.35 per share, acquiring 975,850 shares in their initial purchase.
What is Mason Hawkins's average cost basis for AMG?
Based on historical transaction data, Mason Hawkins's estimated cost basis for Affiliated Managers Group, Inc (AMG) is approximately $82.82 per share. This represents their average reported price* across all buy transactions.
Estimated cost basis*
- Weighted AVG buy price:
- $82.82
- Weighted AVG sell price:
- $161.94
AMG transactions history by Longleaf Partners
8 results
| Period |
% of portfolio |
Shares held after* |
Reported price* |
Value* |
% (shares) of activity |
% change to portfolio |
|---|---|---|---|---|---|---|
|
2025 Q2
|
0.00%
|
0
|
$168.03
|
|
-100% (-326,197)
|
-4.71%
|
|
2025 Q1
|
4.71%
|
326,197
|
$168.03
|
$54,810,882
|
-25.89% (-113,958)
|
-1.5%
|
|
2024 Q3
|
5.73%
|
440,155
|
$177.80
|
$78,259,559
|
-10.58% (-52,097)
|
-0.73%
|
|
2022 Q4
|
6.31%
|
492,252
|
$158.43
|
$77,987,484
|
-20.48% (-126,774)
|
-1.69%
|
|
2021 Q4
|
5.67%
|
619,026
|
$164.51
|
$101,835,967
|
-16.04% (-118,245)
|
-1.11%
|
|
2021 Q1
|
5.83%
|
737,271
|
$149.03
|
$109,875,497
|
-26.11% (-260,516)
|
-2.38%
|
|
2020 Q1
|
5.02%
|
$59.14
|
+2.25% (+21,937)
|
|||
|
2019 Q3
|
4.57%
|
$83.35
|
new
|
|||
* Shares, change to shares, sold shares, shares held after: split-adjusted.
* Reported price: this doesn't represent the actual buy or sell price. It is the split-adjusted price of the security as of the last day of the reported period.
If the security is completely sold out, we show the reported split-adjusted price prior to the actual period.
If the security is completely sold out, we show the reported split-adjusted price prior to the actual period.
* Estimated cost basis: based on "Reported price*" (not earlier than 2013 Q2). Calculation starts from the latest "new buy" activity to the latest "close out" activity (if any).
* Value or Price: If the security is completely sold out, we show the reported value (or price) prior to the actual period.
* New buy or own: this means there is no earlier reporting (for us or in general). So we can't know if the actual purchase of the security happened at the reported period or earlier.