1st Source Corporation
US ˙ NasdaqGS ˙ US3369011032

SecuritySRCE / 1st Source Corporation
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership460,422 shares
Latest Disclosed Value $ 31,888,760
Janus Henderson Group Plc reports 37.37% increase in ownership of SRCE / 1st Source Corporation

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 460,422 shares of 1st Source Corporation (US:SRCE) valued at $31,865,807 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 335,174 shares of 1st Source Corporation. This represents a change in shares of 37.37% during the quarter. The current value of the position is $34,370,502 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)
2026-05-18 2026-03-31 13F/A-1 1ST SOURCE COM 336901103 460,422 125,248 37.37 31,889 52.10 0.0054
2026-05-15 2026-03-31 13F 1ST SOURCE COM 336901103 460,422 125,248 37.37 31,889 52.10 0.0059
2026-02-17 2025-12-31 13F 1ST SOURCE COM 336901103 335,174 110,711 49.32 20,965 51.66 0.0094
2025-11-14 2025-09-30 13F 1ST SOURCE COM 336901103 224,463 84,970 60.91 13,825 59.78 0.0063
2025-08-14 2025-06-30 13F 1ST SOURCE COM 336901103 139,493 131,594 1,665.96 8,653 1,721.47 0.0042
2025-05-15 2025-03-31 13F 1ST SOURCE COM 336901103 7,899 0 0.00 476 3.04 0.0003
2025-02-14 2024-12-31 13F 1ST SOURCE COM 336901103 7,899 0 0.00 462 -2.33 0.0002
2024-11-14 2024-09-30 13F 1ST SOURCE COM 336901103 7,899 0 0.00 472 11.85 0.0002
2024-08-14 2024-06-30 13F 1ST SOURCE COM 336901103 7,899 -37 -0.47 423 1.69 0.0002
2024-05-15 2024-03-31 13F 1ST SOURCE COM 336901103 7,936 1 0.01 416 -4.82 0.0002
2024-02-14 2023-12-31 13F 1ST SOURCE COM 336901103 7,935 -7 -0.09 436 30.93 0.0003
2023-11-14 2023-09-30 13F 1ST SOURCE COM 336901103 7,942 1 0.01 334 0.30 0.0002
2023-08-14 2023-06-30 13F 1ST SOURCE COM 336901103 7,941 -6 -0.08 333 -2.92 0.0002
2023-05-15 2023-03-31 13F 1ST SOURCE COM 336901103 7,947 7,947 343 0.0002
2019-04-30 2019-03-31 13F 1ST SOURCE COM 336901103 0 -385,502 -100.00 0 -100.00
2019-02-06 2018-12-31 13F 1ST SOURCE COM 336901103 385,502 -214,386 -35.74 15,551 -50.73 0.0099
2018-11-09 2018-09-30 13F 1ST SOURCE COM 336901103 599,888 -8,536 -1.40 31,566 -2.90 0.0169
2018-08-10 2018-06-30 13F 1ST SOURCE COM 336901103 608,424 55,646 10.07 32,508 16.17 0.0185
2018-05-14 2018-03-31 13F 1ST SOURCE COM 336901103 552,778 57,655 11.64 27,982 14.29 0.0165
2018-03-12 2017-12-31 13F/A-1 1ST SOURCE COM 336901103 495,123 94,059 23.45 24,484 20.17 0.0151
2018-02-09 2017-12-31 13F 1ST SOURCE COM 336901103 495,123 94,059 24,484
2017-11-14 2017-09-30 13F 1ST SOURCE COM 336901103 401,064 21,502 5.66 20,374 11.97 0.0131
2017-08-17 2017-06-30 13F/A-1 1ST SOURCE COM 336901103 379,562 379,562 18,196 0.0124
2017-08-14 2017-06-30 13F 1ST SOURCE COM 336901103 379,562 18,196
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.