- Quarter end
- 31 Dec 2025
- the date the book describes
- Filed
- 19 Feb 2026
- latest of these filings; the earliest 5 Feb 2026
- Managers listing it
- 20
- at least, of 95 tracked, among listed positions
- Comparable managers
- 92
- filed both Q3 2025 and Q4 2025; 1 listed it in both
- Shares listed
- 3,746,263
- combined, among listed positions
- Reported value
- $58m
- combined, at the quarter end
Among the 92 comparable managers: 12 buyers (opened or added shares) and 7 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +393,645.
Managers listing MCS in Q4 2025
20 of 20 holders
Largest increases and reductions, by shares
Increases
- Arrowstreet Capital LPexisting position · 605,726 shares now+382,641
- Citadel Advisors LLCexisting position · 233,616 shares now+110,417
- GAMCO Investors Incexisting position · 915,835 shares now+100,480
- D. E. Shaw & Co.existing position · 343,310 shares now+58,371
- Jane Street Group LLCexisting position · 53,732 shares now+38,962
Reductions
- Millennium Management LLCexisting position · 101,136 shares now-238,780
- Squarepoint Ops LLCexisting position · 57,268 shares now-72,552
- Marshall Wace LLPexisting position · 311,291 shares now-29,195
- Acadian Asset Management LLCexisting position · 323,603 shares now-15,981
- Invesco Ltdexisting position · 57,975 shares now-4,612
New positions and exits
New (4)
Exited (1)
- Caxton Associates LLPwas $493k
Ownership over time
Tracked managers listing it, at least.
| Quarter | Holders | Reported value | Buyers | Sellers |
|---|---|---|---|---|
| Q2 2013 | 1 | $16m | n.a. | n.a. |
| Q3 2013 | 2 | $24m | n.a. | n.a. |
| Q4 2013 | 2 | $23m | n.a. | n.a. |
| Q1 2014 | 2 | $30m | n.a. | n.a. |
| Q2 2014 | 2 | $33m | n.a. | n.a. |
| Q3 2014 | 2 | $31m | n.a. | n.a. |
| Q4 2014 | 2 | $34m | n.a. | n.a. |
| Q1 2015 | 2 | $37m | n.a. | n.a. |
| Q2 2015 | 2 | $32m | n.a. | n.a. |
| Q3 2015 | 2 | $31m | n.a. | n.a. |
| Q4 2015 | 2 | $29m | n.a. | n.a. |
| Q1 2016 | 1 | $23m | n.a. | n.a. |
| Q2 2016 | 1 | $26m | n.a. | n.a. |
| Q3 2016 | 1 | $29m | n.a. | n.a. |
| Q4 2016 | 1 | $34m | n.a. | n.a. |
| Q1 2017 | 1 | $34m | n.a. | n.a. |
| Q2 2017 | 1 | $31m | n.a. | n.a. |
| Q3 2017 | 1 | $29m | n.a. | n.a. |
| Q4 2017 | 1 | $28m | n.a. | n.a. |
| Q1 2018 | 1 | $32m | n.a. | n.a. |
| Q2 2018 | 1 | $34m | n.a. | n.a. |
| Q3 2018 | 4 | $55m | n.a. | n.a. |
| Q4 2018 | 4 | $48m | n.a. | n.a. |
| Q1 2019 | 5 | $81m | n.a. | n.a. |
| Q2 2019 | 2 | $39m | n.a. | n.a. |
| Q3 2019 | 2 | $41m | n.a. | n.a. |
| Q4 2019 | 2 | $34m | n.a. | n.a. |
| Q1 2020 | 2 | $13m | n.a. | n.a. |
| Q2 2020 | 1 | $9.6m | n.a. | n.a. |
| Q3 2020 | 2 | $6.7m | n.a. | n.a. |
| Q4 2020 | 1 | $9.3m | n.a. | n.a. |
| Q1 2021 | 1 | $14m | n.a. | n.a. |
| Q2 2021 | 3 | $16m | n.a. | n.a. |
| Q3 2021 | 3 | $17m | n.a. | n.a. |
| Q4 2021 | 3 | $18m | n.a. | n.a. |
| Q1 2022 | 3 | $17m | n.a. | n.a. |
| Q2 2022 | 2 | $14m | n.a. | n.a. |
| Q3 2022 | 2 | $11m | n.a. | n.a. |
| Q4 2022 | 2 | $11m | n.a. | n.a. |
| Q1 2023 | 2 | $13m | n.a. | n.a. |
| Q2 2023 | 1 | $12m | n.a. | n.a. |
| Q3 2023 | 2 | $13m | n.a. | n.a. |
| Q4 2023 | 2 | $12m | 1 | 1 |
| Q1 2024 | 2 | $17m | 1 | 1 |
| Q2 2024 | 2 | $10m | 2 | 0 |
| Q3 2024 | 1 | $12m | 1 | 0 |
| Q4 2024 | 2 | $18m | 1 | 1 |
| Q1 2025 | 2 | $14m | 1 | 1 |
| Q2 2025 | 2 | $14m | 1 | 0 |
| Q3 2025 | 2 | $13m | 0 | 1 |
| Q4 2025 | 2 | $15m | 12 | 7 |
| Q1 2026 | 2 | $17m | 12 | 9 |
| Q2 2026 | 3 | $41m | 11 | 12 |
Compare with…
Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.
MCS and NFLX →MCS and TMUS →MCS and CMCSA →Choose a stock to compare with MCS →
How much of the picture this is
A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.
Which funds own MCS, latest filings →Back to the 13F Explorer →