1st Source Corporation
US ˙ NasdaqGS ˙ US3369011032

SecuritySRCE / 1st Source Corporation
InstitutionNorthern Trust Corp
Latest Disclosed Ownership183,887 shares
Latest Disclosed Value $ 12,726,820
Northern Trust Corp reports 4.55% increase in ownership of SRCE / 1st Source Corporation

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 183,887 shares of 1st Source Corporation (US:SRCE) valued at $12,726,819 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 175,887 shares of 1st Source Corporation. This represents a change in shares of 4.55% during the quarter. The current value of the position is $13,727,165 USD.

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.

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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)
2026-05-14 2026-03-31 13F 1ST SOURCE COM 336901103 183,887 8,000 4.55 12,727 15.79 0.0003
2026-02-17 2025-12-31 13F 1ST SOURCE COM 336901103 175,887 -14,599 -7.66 10,991 -6.27 0.0003
2025-11-14 2025-09-30 13F 1ST SOURCE COM 336901103 190,486 -2,123 -1.10 11,726 -1.92 0.0003
2025-08-13 2025-06-30 13F 1ST SOURCE COM 336901103 192,609 -11,580 -5.67 11,955 -2.10 0.0016
2025-05-13 2025-03-31 13F 1ST SOURCE COM 336901103 204,189 19,755 10.71 12,213 13.42 0.0018
2025-02-14 2024-12-31 13F 1ST SOURCE COM 336901103 184,434 9,165 5.23 10,767 2.59 0.0015
2024-11-13 2024-09-30 13F 1ST SOURCE COM 336901103 175,269 10,659 6.48 10,495 18.91 0.0017
2024-08-14 2024-06-30 13F 1ST SOURCE COM 336901103 164,610 -4,942 -2.91 8,826 -0.69 0.0015
2024-05-14 2024-03-31 13F 1ST SOURCE COM 336901103 169,552 -23,249 -12.06 8,888 -16.11 0.0015
2024-02-13 2023-12-31 13F 1ST SOURCE COM 336901103 192,801 4,101 2.17 10,594 33.39 0.0019
2023-11-13 2023-09-30 13F 1ST SOURCE COM 336901103 188,700 927 0.49 7,942 0.88 0.0015
2023-08-11 2023-06-30 13F 1ST SOURCE COM 336901103 187,773 6,297 3.47 7,873 0.55 0.0015
2023-05-15 2023-03-31 13F 1ST SOURCE COM 336901103 181,476 -3,296 -1.78 7,831 -20.18 0.0016
2023-02-13 2022-12-31 13F 1ST SOURCE COM 336901103 184,772 -1,683 -0.90 9,810 13.62 0.0021
2022-11-14 2022-09-30 13F 1ST SOURCE COM 336901103 186,455 -1,117 -0.60 8,633 1.37 0.0020
2022-08-12 2022-06-30 13F 1ST SOURCE COM 336901103 187,572 -6,864 -3.53 8,516 -5.30 0.0018
2022-05-13 2022-03-31 13F 1ST SOURCE COM 336901103 194,436 -6,583 -3.27 8,993 -9.81 0.0016
2022-02-08 2021-12-31 13F 1ST SOURCE COM 336901103 201,019 -4,966 -2.41 9,971 2.47 0.0016
2021-11-15 2021-09-30 13F 1ST SOURCE COM 336901103 205,985 -7,652 -3.58 9,731 -1.96 0.0017
2021-08-13 2021-06-30 13F 1ST SOURCE COM 336901103 213,637 1,360 0.64 9,926 -1.72 0.0017
2021-05-12 2021-03-31 13F 1ST SOURCE COM 336901103 212,277 -37,884 -15.14 10,100 0.18 0.0019
2021-02-11 2020-12-31 13F 1ST SOURCE COM 336901103 250,161 -10,666 -4.09 10,082 25.34 0.0020
2020-11-16 2020-09-30 13F 1ST SOURCE COM 336901103 260,827 -2,422 -0.92 8,044 -14.11 0.0018
2020-08-14 2020-06-30 13F 1ST SOURCE COM 336901103 263,249 16,768 6.80 9,366 17.18 0.0022
2020-05-14 2020-03-31 13F 1ST SOURCE COM 336901103 246,481 1,677 0.69 7,993 -37.07 0.0023
2020-02-14 2019-12-31 13F 1ST SOURCE COM 336901103 244,804 -3,810 -1.53 12,701 11.72 0.0028
2019-11-13 2019-09-30 13F 1ST SOURCE COM 336901103 248,614 -13,711 -5.23 11,369 -6.60 0.0027
2019-08-13 2019-06-30 13F 1ST SOURCE COM 336901103 262,325 370 0.14 12,172 3.48 0.0029
2019-05-13 2019-03-31 13F 1ST SOURCE COM 336901103 261,955 848 0.32 11,763 11.68 0.0029
2019-02-12 2018-12-31 13F 1ST SOURCE COM 336901103 261,107 -5,037 -1.89 10,533 -24.79 0.0030
2018-11-14 2018-09-30 13F 1ST SOURCE COM 336901103 266,144 3,577 1.36 14,005 -0.16 0.0034
2018-09-18 2018-06-30 13F/A-1 1ST SOURCE COM 336901103 262,567 2,557 0.98 14,028 6.59 0.0036
2018-08-14 2018-06-30 13F 1ST SOURCE COM 336901103 264,264 4,254 14,119
2018-05-09 2018-03-31 13F 1ST SOURCE COM 336901103 260,010 3,685 1.44 13,161 3.83 0.0034
2018-02-14 2017-12-31 13F 1ST SOURCE COM 336901103 256,325 -2,934 -1.13 12,675 -3.76 0.0032
2017-11-13 2017-09-30 13F 1ST SOURCE COM 336901103 259,259 -1,288 -0.49 13,170 5.44 0.0034
2017-08-11 2017-06-30 13F 1ST SOURCE COM 336901103 260,547 4,542 1.77 12,491 3.93 0.0035
2017-05-12 2017-03-31 13F 1ST SOURCE COM 336901103 256,005 15,665 6.52 12,019 11.97 0.0035
2017-02-13 2016-12-31 13F 1ST SOURCE COM 336901103 240,340 5,839 2.49 10,734 28.24 0.0033
2016-11-09 2016-09-30 13F 1ST SOURCE COM 336901103 234,501 16,135 7.39 8,370 18.32 0.0026
2016-08-12 2016-06-30 13F 1ST SOURCE COM 336901103 218,366 3,173 1.47 7,074 3.25 0.0023
2016-08-19 2016-03-31 13F/A-1 1ST SOURCE COM 336901103 215,193 2,365 1.11 6,851 4.28 0.0023
2016-05-13 2016-03-31 13F 1ST SOURCE COM 336901103 215,193 6,851
2016-02-12 2015-12-31 13F 1ST SOURCE COM 336901103 212,828 -466 -0.22 6,570 0.00 0.0022
2015-11-12 2015-09-30 13F 1ST SOURCE COM 336901103 213,294 18,159 9.31 6,570 -1.32 0.0022
2015-08-13 2015-06-30 13F 1ST SOURCE COM 336901103 195,135 14,909 8.27 6,658 14.97 0.0045
2015-05-14 2015-03-31 13F 1ST SOURCE COM 336901103 180,226 5,631 3.23 5,791 -3.32 0.0017
2015-02-12 2014-12-31 13F 1ST SOURCE COM 336901103 174,595 -6,901 -3.80 5,990 15.88 0.0018
2014-11-13 2014-09-30 13F 1ST SOURCE COM 336901103 181,496 -10,671 -5.55 5,169 -12.15 0.0016
2014-08-14 2014-06-30 13F 1ST SOURCE COM 336901103 192,167 -25,427 -11.69 5,884 -15.73 0.0018
2014-05-14 2014-03-31 13F 1ST SOURCE COM 336901103 217,594 -13,942 -6.02 6,982 -5.58 0.0022
2014-02-21 2013-12-31 13F/A-1 1ST SOURCE COM 336901103 231,536 10,618 4.81 7,395 24.35 0.0024
2014-02-12 2013-12-31 13F 1ST SOURCE COM 336901103 231,536 7,395
2013-11-13 2013-09-30 13F 1ST SOURCE COM 336901103 220,918 1,933 0.88 5,947 14.30 0.0021
2013-08-09 2013-06-30 13F 1ST SOURCE COM 336901103 218,985 218,985 5,203 0.0019
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.