MSCI Inc.
MX ˙ BMV ˙ US55354G1004
SecurityMX:MSCI / MSCI Inc.
InstitutionTwo Sigma Investments, Lp
ManagerJohn Overdeck, David Siegel
Latest Disclosed Ownership581,832 shares
Latest Disclosed Value $ 313,613,266
Two Sigma Investments, Lp ownership in MSCI / MSCI Inc.

On May 15, 2026 - Two Sigma Investments, Lp filed a 13F-HR form disclosing ownership of 581,832 shares of MSCI Inc. (MX:MSCI) valued at $313,613,266 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 372,616 shares of MSCI Inc.. This represents a change in shares of 56.15% during the quarter.

Two Sigma Investments, Lp has a history of taking positions in derivatives of the underlying security (MSCI) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Institutional Put/Call Ratios
(Premium Subscription Required)

In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:MSCI / MSCI Inc. Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F MSCI COM 55354G100 581,832 209,216 56.15 313,613 46.70 0.2531
2026-02-17 2025-12-31 13F MSCI COM 55354G100 372,616 188,574 102.46 213,781 104.72 0.3015
2025-11-14 2025-09-30 13F MSCI COM 55354G100 184,042 -252,800 -57.87 104,427 -58.55 0.1555
2025-08-14 2025-06-30 13F MSCI COM 55354G100 436,842 15,193 3.60 251,944 5.66 0.4461
2025-05-15 2025-03-31 13F MSCI COM 55354G100 421,649 164,598 64.03 238,443 54.60 0.5096
2025-02-14 2024-12-31 13F MSCI COM 55354G100 257,051 -26,862 -9.46 154,233 -6.81 0.3364
2024-11-14 2024-09-30 13F MSCI COM 55354G100 283,913 -57,124 -16.75 165,501 0.73 0.3627
2024-08-14 2024-06-30 13F MSCI COM 55354G100 341,037 193,908 131.79 164,295 99.25 0.3742
2024-05-15 2024-03-31 13F MSCI COM 55354G100 147,129 30,064 25.68 82,458 24.53 0.1935
2024-02-14 2023-12-31 13F MSCI COM 55354G100 117,065 51,340 78.11 66,218 96.36 0.1521
2023-11-14 2023-09-30 13F MSCI COM 55354G100 65,725 -104,078 -61.29 33,722 -57.68 0.0907
2023-08-14 2023-06-30 13F MSCI COM 55354G100 169,803 131,989 349.05 79,687 276.52 0.1999
2023-05-15 2023-03-31 13F MSCI COM 55354G100 37,814 -68,109 -64.30 21,164 -57.05 0.0605
2023-02-14 2022-12-31 13F MSCI COM 55354G100 105,923 49,439 87.53 49,272 106.82 0.1547
2022-11-14 2022-09-30 13F MSCI COM 55354G100 56,484 -87,272 -60.71 23,824 -59.79 0.0810
2022-08-15 2022-06-30 13F MSCI COM 55354G100 143,756 7,140 5.23 59,249 -13.76 0.1955
2022-05-16 2022-03-31 13F MSCI COM 55354G100 136,616 118,399 649.94 68,701 515.55 0.2028
2022-02-14 2021-12-31 13F MSCI COM 55354G100 18,217 18,217 11,161 0.0238
2021-11-15 2021-09-30 13F MSCI COM 55354G100 0 -885 -100.00 0 -100.00
2021-08-16 2021-06-30 13F MSCI COM 55354G100 885 885 472 0.0011
2021-05-17 2021-03-31 13F MSCI COM 55354G100 0 -2,511 -100.00 0 -100.00
2021-02-16 2020-12-31 13F MSCI COM 55354G100 2,511 -12,894 -83.70 1,121 -79.60 0.0032
2020-11-16 2020-09-30 13F MSCI COM 55354G100 15,405 15,405 513.50 5,496 390.28 0.0195
2020-05-15 2020-03-31 13F MSCI COM 55354G100 0 -18,651 -100.00 0 -100.00
2020-02-14 2019-12-31 13F MSCI COM 55354G100 18,651 18,651 4,815 0.0145
2019-11-14 2019-09-30 13F MSCI COM 55354G100 0 -67,651 -100.00 0 -100.00
2019-08-14 2019-06-30 13F MSCI COM 55354G100 67,651 21,933 47.97 16,154 77.69 0.0540
2019-05-15 2019-03-31 13F MSCI COM 55354G100 45,718 -114,620 -71.49 9,091 -61.54 0.0295
2019-02-14 2018-12-31 13F MSCI COM 55354G100 160,338 160,338 250.71 23,639 160.03 0.0926
2018-11-14 2018-09-30 13F MSCI COM 55354G100 0 -67,144 -100.00 0 -100.00
2018-08-14 2018-06-30 13F MSCI COM 55354G100 67,144 -28,338 -29.68 11,108 -22.17 0.0331
2018-05-15 2018-03-31 13F MSCI COM 55354G100 95,482 -11,796 -11.00 14,272 5.13 0.0475
2018-02-14 2017-12-31 13F MSCI COM 55354G100 107,278 57,586 115.89 13,575 133.69 0.0442
2017-11-14 2017-09-30 13F MSCI COM 55354G100 49,692 45,055 971.64 5,809 1,115.27 0.0206
2017-08-14 2017-06-30 13F MSCI COM 55354G100 4,637 -382,595 -98.80 478 -98.73 0.0017
2017-05-15 2017-03-31 13F MSCI COM 55354G100 387,232 387,232 8,250.92 37,635 7,773.43 0.1267
2016-08-15 2016-06-30 13F MSCI COM 55354G100 0 -111,361 -100.00 0 -100.00
2016-05-16 2016-03-31 13F MSCI COM 55354G100 111,361 -75,861 -40.52 8,250 -38.91 0.0393
2016-02-16 2015-12-31 13F MSCI COM 55354G100 187,222 187,222 68.12 13,504 63.68 0.0648
2015-11-16 2015-09-30 13F MSCI COM 55354G100 0 -294,998 -100.00 0 -100.00
2016-02-09 2015-06-30 13F/A-1 MSCI COM 55354G100 294,998 118,870 67.49 18,157 68.15 0.0882
2015-08-14 2015-06-30 13F MSCI COM 55354G100 294,998 18,157
2016-02-09 2015-03-31 13F/A-1 MSCI COM 55354G100 176,128 -43,952 -19.97 10,798 3.42 0.0532
2015-05-15 2015-03-31 13F MSCI COM 55354G100 176,128 10,799
2016-02-09 2014-12-31 13F/A-1 MSCI COM 55354G100 220,080 220,080 24.95 10,441 -3.31 0.0600
2015-02-17 2014-12-31 13F MSCI COM 55354G100 220,080 10,441
2014-11-14 2014-09-30 13F MSCI COM 55354G100 0 -74,644 -100.00 0 -100.00
2016-02-09 2014-06-30 13F/A-1 MSCI COM 55354G100 74,644 19,513 35.39 3,422 44.27 0.0161
2014-08-14 2014-06-30 13F MSCI COM 55354G100 74,644 3,422
2014-05-15 2014-03-31 13F MSCI COM 55354G100 55,131 50,384 1,061.39 2,372 1,040.38 0.0127
2014-02-14 2013-12-31 13F MSCI COM 55354G100 4,747 4,747 -91.39 208 -91.23 0.0012
2013-11-14 2013-09-30 13F MSCI COM 55354G100 0 -37,780 -100.00 0 -100.00
2013-08-14 2013-06-30 13F MSCI COM 55354G100 37,780 37,780 1,257 0.0088
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2022-05-16 2022-03-31 13F MSCI COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-02-14 2021-12-31 13F MSCI COM Call 800 490 n/a n/a n/a
2021-08-16 2021-06-30 13F MSCI COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-05-17 2021-03-31 13F MSCI COM Call 2,100 880 n/a n/a n/a
2020-05-15 2020-03-31 13F MSCI COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-02-14 2019-12-31 13F MSCI COM Call 2,100 110.00 542 148.62 n/a n/a n/a
2019-11-14 2019-09-30 13F MSCI COM Call 1,000 218 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2022-05-16 2022-03-31 13F MSCI COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-02-14 2021-12-31 13F MSCI COM Put 900 551 n/a n/a n/a
2021-08-16 2021-06-30 13F MSCI COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-05-17 2021-03-31 13F MSCI COM Put 700 -30.00 293 -34.45 n/a n/a n/a
2021-02-16 2020-12-31 13F MSCI COM Put 1,000 42.86 447 52.56 n/a n/a n/a
2020-05-15 2020-03-31 13F MSCI COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2020-02-14 2019-12-31 13F MSCI COM Put 3,300 65.00 852 95.41 n/a n/a n/a
2019-11-14 2019-09-30 13F MSCI COM Put 2,000 436 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.