GATEWAY INVESTMENT ADVISERS LLC Historic Quarter Change: USA SPAC Units, Reduced

Each consecutive pair of Form 13F-HR filings compared (SEC CIK 1114618), 23 quarters: Q2 2026 (2026-03-31 to 2026-06-30, filed 2026-07-20); Q1 2026 (2025-12-31 to 2026-03-31, filed 2026-04-13); Q4 2025 (2025-09-30 to 2025-12-31, filed 2026-02-03); Q3 2025 (2025-06-30 to 2025-09-30, filed 2025-10-21); Q2 2025 (2025-03-31 to 2025-06-30, filed 2025-07-09); Q1 2025 (2024-12-31 to 2025-03-31, filed 2025-04-11); Q4 2024 (2024-09-30 to 2024-12-31, filed 2025-01-15); Q3 2024 (2024-06-30 to 2024-09-30, filed 2024-10-10); Q2 2024 (2024-03-31 to 2024-06-30, filed 2024-07-12); Q1 2024 (2023-12-31 to 2024-03-31, filed 2024-04-12); Q3 2016 (2016-06-30 to 2016-09-30, filed 2016-10-24); Q2 2016 (2016-03-31 to 2016-06-30, filed 2016-07-12); Q1 2016 (2015-12-31 to 2016-03-31, filed 2016-04-18); Q4 2015 (2015-09-30 to 2015-12-31, filed 2016-01-25); Q3 2015 (2015-06-30 to 2015-09-30, filed 2015-10-20); Q2 2015 (2015-03-31 to 2015-06-30, filed 2015-07-22); Q1 2015 (2014-12-31 to 2015-03-31, filed 2015-04-21); Q4 2014 (2014-09-30 to 2014-12-31, filed 2015-01-28); Q3 2014 (2014-06-30 to 2014-09-30, filed 2014-10-10); Q2 2014 (2014-03-31 to 2014-06-30, filed 2014-07-23); Q1 2014 (2013-12-31 to 2014-03-31, filed 2014-04-22); Q4 2013 (2013-09-30 to 2013-12-31, filed 2014-01-21); Q3 2013 (2013-06-30 to 2013-09-30, filed 2013-10-21). Rows for the same security, class and put/call are added together. Value change is the filed value at each quarter end, so it includes the price move. Only the filings held here are compared; the firm's 13F-HR filings go back to the quarter ended 2001-03-31. Not compared, as a quarter between them is not held here yet: 2016-09-30 to 2023-12-31 (missing 2016-12-31, 2017-03-31, 2017-06-30, 2017-09-30, 2017-12-31, 2018-03-31, 2018-06-30, 2018-09-30, 2018-12-31, 2019-03-31, 2019-06-30, 2019-09-30, 2019-12-31, 2020-03-31, 2020-06-30, 2020-09-30, 2020-12-31, 2021-03-31, 2021-06-30, 2021-09-30, 2021-12-31, 2022-03-31, 2022-06-30, 2022-09-30, 2022-12-31, 2023-03-31, 2023-06-30, 2023-09-30).