MSFT
Microsoft Corp
Microsoft Corp historical holders
total: 57
AltaRock Partners Microsoft Corp transactions over time
- Total transactions:
- 17
- New positions:
- 1
- Added:
- 6
- Reduced:
- 10
- Held since:
- 2021 Q2
- Held for:
- 20 quarters
- Latest activity:
- 2026 Q1
Mark Massey has been an institutional investor in Microsoft Corp (MSFT) since 2021 Q2. According to 2026 Q1 report, Mark Massey holds 1,867,537 shares with a market value of roughly $691.31M representing 16.75% of their equity portfolio. The fund/company first acquired MSFT in 2021 Q2, initially purchasing 823,333 shares. Since the initial investment, AltaRock Partners has made 16 more transactions in this position.
Does Mark Massey still hold MSFT?
Yes, Mark Massey continues to hold Microsoft Corp (MSFT). According to their 2026 Q1 report, they maintain a position of 1,867,537 shares valued at approximately $691.31M, representing 16.75% of their equity portfolio.
When did Mark Massey first invest in MSFT?
Mark Massey first invested in Microsoft Corp (MSFT) in 2021 Q2 at the reported quarter-end price of $270.90 per share, acquiring 823,333 shares in their initial purchase.
What is Mark Massey's average cost basis for MSFT?
Based on historical transaction data, Mark Massey's estimated cost basis for Microsoft Corp (MSFT) is approximately $309.71 per share. This represents their average reported price* across all buy transactions.
Estimated cost basis*
- Weighted AVG buy price:
- $309.71
- Weighted AVG sell price:
- $378.23
MSFT transactions history by AltaRock Partners
17 results
| Period |
% of portfolio |
Shares held after* |
Reported price* |
Value* |
% (shares) of activity |
% change to portfolio |
|---|---|---|---|---|---|---|
|
2026 Q1
|
16.75%
|
1,867,537
|
$370.17
|
$691,306,171
|
-10.32% (-214,820)
|
-1.56%
|
|
2025 Q4
|
19.75%
|
2,082,357
|
$483.62
|
$1,007,069,492
|
-18.95% (-486,910)
|
-4.31%
|
|
2025 Q3
|
24.33%
|
2,569,267
|
$517.95
|
$1,330,751,843
|
-0.36% (-9,382)
|
-0.09%
|
|
2025 Q1
|
19.46%
|
2,578,649
|
$375.39
|
$967,999,048
|
+36.32% (+687,008)
|
+5.19%
|
|
2024 Q4
|
16.13%
|
1,891,641
|
$421.50
|
$797,326,682
|
-2.23% (-43,175)
|
-0.36%
|
|
2024 Q2
|
17.80%
|
1,934,816
|
$446.95
|
$864,766,011
|
+10.30% (+180,630)
|
+1.66%
|
|
2024 Q1
|
15.86%
|
1,754,186
|
$420.72
|
$738,021,134
|
-11.88% (-236,528)
|
-2.22%
|
|
2023 Q4
|
16.70%
|
1,990,714
|
$376.04
|
$748,588,093
|
-9.98% (-220,798)
|
-2.08%
|
|
2023 Q3
|
17.49%
|
2,211,512
|
$315.75
|
$698,284,914
|
-2.66% (-60,529)
|
-0.46%
|
|
2023 Q2
|
18.58%
|
2,272,041
|
$340.54
|
$773,720,842
|
-2.57% (-59,888)
|
-0.56%
|
|
2023 Q1
|
18.42%
|
$288.30
|
-8.91% (-228,200)
|
|||
|
2022 Q4
|
19.30%
|
$239.82
|
-9.17% (-258,380)
|
|||
|
2022 Q3
|
21.49%
|
$232.90
|
+3.17% (+86,500)
|
|||
|
2022 Q2
|
21.65%
|
$256.83
|
+3.67% (+96,700)
|
|||
|
2022 Q1
|
20.72%
|
$308.31
|
+53.20% (+915,133)
|
|||
|
2021 Q3
|
13.08%
|
$281.92
|
+108.93% (+896,843)
|
|||
|
2021 Q2
|
6.17%
|
$270.90
|
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.