Napco Security Technologies, Inc.
DE ˙ DB ˙ US6304021057
30,62 € ↓ -0,19 (-0,62%)
2026-06-04
DEL PRIS
SecurityDE:NS1 / Napco Security Technologies, Inc.
InstitutionMorgan Stanley
Latest Disclosed Ownership464,861 shares
Latest Disclosed Value $ 18,310,931
Morgan Stanley reports 9.76% increase in ownership of NS1 / Napco Security Technologies, Inc.

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 464,861 shares of Napco Security Technologies, Inc. (DE:NS1) valued at $15,303,224 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 423,516 shares of Napco Security Technologies, Inc.. This represents a change in shares of 9.76% during the quarter. The current value of the position is $14,234,044 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)
2026-05-15 2026-03-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 464,861 41,345 9.76 18,311 3.68 0.0011
2026-05-27 2025-12-31 13F/A-1 NAPCO SEC TECHNOLOGIES COM 630402105 423,516 42,922 11.28 17,661 8.04 0.0011
2026-02-13 2025-12-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 423,516 42,922 17,661 0.0011
2026-05-27 2025-09-30 13F/A-1 NAPCO SEC TECHNOLOGIES COM 630402105 380,594 -219,920 -36.62 16,347 -8.32 0.0010
2025-11-14 2025-09-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 380,594 -219,920 16,347 0.0010
2025-08-15 2025-06-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 600,514 20,194 3.48 17,829 33.47 0.0012
2025-05-15 2025-03-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 580,320 78,221 15.58 13,359 -25.18 0.0010
2025-05-15 2024-12-31 13F/A-1 NAPCO SEC TECHNOLOGIES COM 630402105 502,099 -214,961 -29.98 17,855 -38.46 0.0013
2025-02-14 2024-12-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 502,099 -214,961 17,855 0.0013
2025-05-14 2024-09-30 13F/A-2 NAPCO SEC TECHNOLOGIES COM 630402105 717,060 463,523 182.82 29,012 120.27 0.0021
2025-02-14 2024-09-30 13F/A-1 NAPCO SEC TECHNOLOGIES COM 630402105 717,060 463,523 29,012 0.0021
2024-11-14 2024-09-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 717,060 463,523 29,012 0.0002
2025-05-14 2024-06-30 13F/A-2 NAPCO SEC TECHNOLOGIES COM 630402105 253,537 -69,294 -21.46 13,171 1.60 0.0010
2024-10-17 2024-06-30 13F/A-1 NAPCO SEC TECHNOLOGIES COM 630402105 253,537 -69,294 13,171 0.0010
2024-08-14 2024-06-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 253,537 -69,294 13,171 0.0010
2024-10-17 2024-03-31 13F/A-2 NAPCO SEC TECHNOLOGIES COM 630402105 322,831 161,534 100.15 12,965 134.69 0.0010
2024-08-16 2024-03-31 13F/A-1 NAPCO SEC TECHNOLOGIES COM 630402105 322,831 161,534 12,965 0.0001
2024-05-15 2024-03-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 322,831 161,534 12,965 0.0010
2024-08-16 2023-12-31 13F/A-1 NAPCO SEC TECHNOLOGIES COM 630402105 161,297 46,286 40.24 5,524 115.87 0.0005
2024-02-13 2023-12-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 161,297 46,286 5,524 0.0005
2023-11-15 2023-09-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 115,011 -306,094 -72.69 2,559 -82.46 0.0003
2023-08-14 2023-06-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 421,105 -17,712 -4.04 14,591 -11.52 0.0014
2023-05-15 2023-03-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 438,817 45,539 11.58 16,491 52.59 0.0018
2023-02-14 2022-12-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 393,278 81,634 26.19 10,807 19.24 0.0012
2022-11-14 2022-09-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 311,644 118,872 61.66 9,063 128.34 0.0012
2022-10-27 2022-06-30 13F/A-1 NAPCO SEC TECHNOLOGIES COM 630402105 192,772 -24,429 -11.25 3,969 -10.93 0.0005
2022-08-15 2022-06-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 192,772 -24,429 3,969 0.0001
2022-10-27 2022-03-31 13F/A-1 NAPCO SEC TECHNOLOGIES COM 630402105 217,201 97,164 80.95 4,456 -25.72 0.0006
2022-05-13 2022-03-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 217,201 97,164 4,456 0.0006
2022-02-14 2021-12-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 120,037 69,420 137.15 5,999 175.06 0.0007
2021-11-15 2021-09-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 50,617 20,581 68.52 2,181 99.54 0.0003
2021-08-23 2021-06-30 13F/A-1 NAPCO SEC TECHNOLOGIES COM 630402105 30,036 21,140 237.63 1,093 252.58 0.0001
2021-08-16 2021-06-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 30,036 21,140 1,093 0.0000
2021-05-17 2021-03-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 8,896 -8,322 -48.33 310 -31.26 0.0000
2021-02-16 2020-12-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 17,218 7,536 77.84 451 97.81 0.0001
2020-11-13 2020-09-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 9,682 -5,409 -35.84 228 -35.41 0.0000
2020-08-14 2020-06-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 15,091 5,305 54.21 353 136.91 0.0001
2020-05-26 2020-03-31 13F/A-1 NAPCO SEC TECHNOLOGIES COM 630402105 9,786 -19,600 -66.70 149 -82.75 0.0000
2020-05-15 2020-03-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 9,786 -19,600 149 11.4463
2020-02-14 2019-12-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 29,386 24,640 519.17 864 614.05 0.0002
2019-11-14 2019-09-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 4,746 -14,007 -74.69 121 -78.28 0.0000
2019-08-14 2019-06-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 18,753 14,157 308.03 557 480.21 0.0001
2019-05-15 2019-03-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 4,596 -36,076 -88.70 96 -85.02 0.0000
2019-02-14 2018-12-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 40,672 -10,836 -21.04 641 -16.75 0.0002
2019-04-23 2018-09-30 13F/A-2 NAPCO SEC TECHNOLOGIES COM 630402105 51,508 12,849 33.24 770 35.80 0.0002
2018-11-20 2018-09-30 13F/A-1 NAPCO SEC TECHNOLOGIES COM 630402105 51,508 0 770 0.0002
2018-11-14 2018-09-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 51,508 12,849 770
2019-04-23 2018-06-30 13F/A-1 NAPCO SEC TECHNOLOGIES COM 630402105 38,659 4,167 12.08 567 40.35 0.0002
2018-08-14 2018-06-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 38,659 4,167 567
2019-04-23 2018-03-31 13F/A-1 NAPCO SEC TECHNOLOGIES COM 630402105 34,492 -7,083 -17.04 404 10.68 0.0001
2018-05-14 2018-03-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 34,492 -7,083 404
2019-04-23 2017-12-31 13F/A-1 NAPCO SEC TECHNOLOGIES COM 630402105 41,575 13,899 50.22 365 36.19 0.0001
2018-02-14 2017-12-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 41,575 13,899 365
2017-11-14 2017-09-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 27,676 16,509 147.84 268 155.24 0.0001
2017-08-11 2017-06-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 11,167 9,089 437.39 105 377.27 0.0000
2017-05-22 2017-03-31 13F/A-1 NAPCO SEC TECHNOLOGIES COM 630402105 2,078 1,928 1,285.33 22 2,100.00 0.0000
2017-05-12 2017-03-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 2,078 22
2017-02-22 2016-12-31 13F/A-1 NAPCO SEC TECHNOLOGIES COM 630402105 150 0 0.00 1 0.00 0.0000
2017-02-13 2016-12-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 150 1
2016-11-10 2016-09-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 150 0 0.00 1 0.00 0.0000
2016-08-12 2016-06-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 150 0 0.00 1 0.00 0.0000
2016-05-12 2016-03-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 150 -300 -66.67 1 -66.67 0.0000
2016-02-09 2015-12-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 450 300 200.00 3 200.00 0.0000
2016-02-08 2015-09-30 13F/A-1 NAPCO SEC TECHNOLOGIES COM 630402105 150 0 0.00 1 0.00 0.0000
2015-11-09 2015-09-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 150 1
2015-08-12 2015-06-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 150 -21 -12.28 1 0.00 0.0000
2015-05-14 2015-03-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 171 21 14.00 1 0.00 0.0000
2015-02-13 2014-12-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 150 -1,613 -91.49 1 -87.50 0.0000
2014-12-16 2014-09-30 13F/A-1 NAPCO SEC TECHNOLOGIES COM 630402105 1,763 860 95.24 8 33.33 0.0000
2014-11-14 2014-09-30 13F NAPCO SEC TECHNOLOGIES COM 630402105 1,763 8
2014-05-13 2014-03-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 903 803 803.00 6 500.00 0.0000
2014-02-13 2013-12-31 13F NAPCO SEC TECHNOLOGIES COM 630402105 100 100 1 0.0000
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.