Anterix Inc.
US ˙ NasdaqCM ˙ US03676C1009

SecurityATEX / Anterix Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership117,610 shares
Latest Disclosed Value $ 4,491,526
Northern Trust Corp reports 2.93% increase in ownership of ATEX / Anterix Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 117,610 shares of Anterix Inc. (US:ATEX) valued at $4,491,526 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 114,262 shares of Anterix Inc.. This represents a change in shares of 2.93% during the quarter. The current value of the position is $7,843,999 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 ANTERIX COM 03676C100 117,610 3,348 2.93 4,492 80.07 0.0001
2026-02-17 2025-12-31 13F ANTERIX COM 03676C100 114,262 -2,743 -2.34 2,494 -0.72 0.0003
2025-11-14 2025-09-30 13F ANTERIX COM 03676C100 117,005 -22,808 -16.31 2,512 -29.95 0.0003
2025-08-13 2025-06-30 13F ANTERIX COM 03676C100 139,813 13,668 10.84 3,586 -22.31 0.0005
2025-05-13 2025-03-31 13F ANTERIX COM 03676C100 126,145 -7,125 -5.35 4,617 12.94 0.0007
2025-02-14 2024-12-31 13F ANTERIX COM 03676C100 133,270 10,463 8.52 4,087 -11.61 0.0006
2024-11-13 2024-09-30 13F ANTERIX COM 03676C100 122,807 -15,036 -10.91 4,625 -15.26 0.0008
2024-08-14 2024-06-30 13F ANTERIX COM 03676C100 137,843 -3,141 -2.23 5,457 15.18 0.0009
2024-05-14 2024-03-31 13F ANTERIX COM 03676C100 140,984 -6,792 -4.60 4,738 -3.76 0.0008
2024-02-13 2023-12-31 13F ANTERIX COM 03676C100 147,776 -76 -0.05 4,924 6.12 0.0009
2023-11-13 2023-09-30 13F ANTERIX COM 03676C100 147,852 -35,418 -19.33 4,640 -20.11 0.0009
2023-08-11 2023-06-30 13F ANTERIX COM 03676C100 183,270 4,738 2.65 5,808 -1.54 0.0011
2023-05-15 2023-03-31 13F ANTERIX COM 03676C100 178,532 -166 -0.09 5,899 2.61 0.0012
2023-02-13 2022-12-31 13F ANTERIX COM 03676C100 178,698 6,393 3.71 5,749 -6.61 0.0012
2022-11-14 2022-09-30 13F ANTERIX COM 03676C100 172,305 41,938 32.17 6,155 14.96 0.0014
2022-08-12 2022-06-30 13F ANTERIX COM 03676C100 130,367 -503 -0.38 5,354 -29.33 0.0011
2022-05-13 2022-03-31 13F ANTERIX COM 03676C100 130,870 -5,793 -4.24 7,576 -5.67 0.0013
2022-02-08 2021-12-31 13F ANTERIX COM 03676C100 136,663 -195 -0.14 8,031 -3.33 0.0013
2021-11-15 2021-09-30 13F ANTERIX COM 03676C100 136,858 7,323 5.65 8,308 6.91 0.0015
2021-08-13 2021-06-30 13F ANTERIX COM 03676C100 129,535 -8,682 -6.28 7,771 19.21 0.0014
2021-05-12 2021-03-31 13F ANTERIX COM 03676C100 138,217 -12,181 -8.10 6,519 15.30 0.0012
2021-02-11 2020-12-31 13F ANTERIX COM 03676C100 150,398 -7,354 -4.66 5,654 9.59 0.0011
2020-11-16 2020-09-30 13F ANTERIX COM 03676C100 157,752 -31,231 -16.53 5,159 -39.79 0.0011
2020-08-14 2020-06-30 13F ANTERIX COM 03676C100 188,983 36,931 24.29 8,569 23.40 0.0020
2020-05-14 2020-03-31 13F ANTERIX COM 03676C100 152,052 3,796 2.56 6,944 8.42 0.0020
2020-02-14 2019-12-31 13F ANTERIX COM 03676C100 148,256 -3,549 -2.34 6,405 16.56 0.0014
2019-11-13 2019-09-30 13F ANTERIX COM 03676C100 151,805 26,518 21.17 5,495 -6.69 0.0013
2019-08-13 2019-06-30 13F PDVWIRELESS COM 69290R104 125,287 1,785 1.45 5,889 35.63 0.0014
2019-05-13 2019-03-31 13F PDVWIRELESS COM 69290R104 123,502 3,325 2.77 4,342 -3.38 0.0011
2019-02-12 2018-12-31 13F PDVWIRELESS COM 69290R104 120,177 798 0.67 4,494 11.05 0.0013
2018-11-14 2018-09-30 13F PDVWIRELESS COM 69290R104 119,379 -163 -0.14 4,047 35.67 0.0010
2018-09-18 2018-06-30 13F/A-1 PDVWIRELESS COM 69290R104 119,542 8,374 7.53 2,983 -10.12 0.0008
2018-08-14 2018-06-30 13F PDVWIRELESS COM 69290R104 120,480 9,312 3,006
2018-05-09 2018-03-31 13F PDVWIRELESS COM 69290R104 111,168 60 0.05 3,319 -6.93 0.0009
2018-02-14 2017-12-31 13F PDVWIRELESS COM 69290R104 111,108 -3,321 -2.90 3,566 4.57 0.0009
2017-11-13 2017-09-30 13F PDVWIRELESS COM 69290R104 114,429 -4,201 -3.54 3,410 23.33 0.0009
2017-08-11 2017-06-30 13F PDVWIRELESS COM 69290R104 118,630 2,768 2.39 2,765 9.25 0.0008
2017-05-12 2017-03-31 13F PDVWIRELESS COM 69290R104 115,862 531 0.46 2,531 -2.69 0.0007
2017-02-13 2016-12-31 13F PDVWIRELESS COM 69290R104 115,331 260 0.23 2,601 -1.29 0.0008
2016-11-09 2016-09-30 13F PDVWIRELESS COM 69290R104 115,071 1,944 1.72 2,635 8.88 0.0008
2016-08-12 2016-06-30 13F PDVWIRELESS COM 69290R104 113,127 -27,594 -19.61 2,420 -49.93 0.0008
2016-08-19 2016-03-31 13F/A-1 PDVWIRELESS COM 69290R104 140,721 4,305 3.16 4,833 28.85 0.0016
2016-05-13 2016-03-31 13F PDVWIRELESS COM 69290R104 140,721 4,833
2016-02-12 2015-12-31 13F PDVWIRELESS COM 69290R104 136,416 136,416 3,751 0.0012
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.