Gentex Corporation
DE ˙ DB ˙ US3719011096
21,32 € ↑0,33 (1,57%)
2026-06-04
DEL PRIS
SecurityDE:GTX / Gentex Corporation
InstitutionCastleark Management Llc
Latest Disclosed Ownership8,620 shares
Latest Disclosed Value $ 188,347
Castleark Management Llc ownership in GTX / Gentex Corporation

On May 15, 2026 - Castleark Management Llc filed a 13F-HR form disclosing ownership of 8,620 shares of Gentex Corporation (DE:GTX) valued at $160,332 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 8,620 shares of Gentex Corporation. This represents a change in shares of 0.00% during the quarter. The current value of the position is $183,778 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 GENTEX COM 371901109 8,620 0 0.00 188 -6.00 0.0062
2026-02-12 2025-12-31 13F GENTEX COM 371901109 8,620 0 0.00 201 -17.70 0.0059
2025-11-17 2025-09-30 13F GENTEX COM 371901109 8,620 0 0.00 244 28.57 0.0068
2025-08-18 2025-06-30 13F GENTEX COM 371901109 8,620 0 0.00 190 -5.50 0.0057
2025-05-15 2025-03-31 13F GENTEX COM 371901109 8,620 0 0.00 201 -19.03 0.0070
2025-02-18 2024-12-31 13F GENTEX COM 371901109 8,620 0 0.00 248 -3.14 0.0086
2024-11-15 2024-09-30 13F GENTEX COM 371901109 8,620 -91,800 -91.42 256 -92.47 0.0104
2024-08-14 2024-06-30 13F GENTEX COM 371901109 100,420 -5,860 -5.51 3,385 -11.80 0.1383
2024-05-16 2024-03-31 13F GENTEX COM 371901109 106,280 -12,850 -10.79 3,839 -1.34 0.1597
2024-02-15 2023-12-31 13F GENTEX COM 371901109 119,130 -150 -0.13 3,891 0.23 0.1725
2023-11-15 2023-09-30 13F GENTEX COM 371901109 119,280 110,660 1,283.76 3,881 1,440.08 0.1978
2023-08-16 2023-06-30 13F GENTEX COM 371901109 8,620 0 0.00 252 4.56 0.0114
2023-05-16 2023-03-31 13F GENTEX COM 371901109 8,620 0 0.00 242 2.55 0.0119
2023-02-10 2022-12-31 13F GENTEX COM 371901109 8,620 0 0.00 235 14.08 0.0123
2022-11-15 2022-09-30 13F GENTEX COM 371901109 8,620 0 0.00 206 -14.52 0.0115
2022-08-16 2022-06-30 13F GENTEX COM 371901109 8,620 0 0.00 241 -3.98 0.0129
2022-05-16 2022-03-31 13F GENTEX COM 371901109 8,620 0 0.00 251 -16.33 0.0108
2022-02-16 2021-12-31 13F GENTEX COM 371901109 8,620 0 0.00 300 5.63 0.0110
2021-11-12 2021-09-30 13F GENTEX COM 371901109 8,620 0 0.00 284 -0.35 0.0109
2021-08-17 2021-06-30 13F GENTEX COM 371901109 8,620 0 0.00 285 -7.17 0.0096
2021-05-14 2021-03-31 13F GENTEX COM 371901109 8,620 -275,353 -96.96 307 -96.81 0.0111
2021-02-17 2020-12-31 13F GENTEX COM 371901109 283,973 -47,865 -14.42 9,635 12.76 0.3607
2020-11-16 2020-09-30 13F GENTEX COM 371901109 331,838 323,218 3,749.63 8,545 3,749.10 0.3348
2020-08-14 2020-06-30 13F GENTEX COM 371901109 8,620 0 0.00 222 16.23 0.0097
2020-05-13 2020-03-31 13F GENTEX COM 371901109 8,620 0 0.00 191 -23.60 0.0113
2020-02-14 2019-12-31 13F GENTEX COM 371901109 8,620 0 0.00 250 5.49 0.0100
2019-11-15 2019-09-30 13F GENTEX COM 371901109 8,620 -90,340 -91.29 237 -90.27 0.0097
2019-08-13 2019-06-30 13F GENTEX COM 371901109 98,960 -6,340 -6.02 2,435 11.80 0.0934
2019-05-14 2019-03-31 13F GENTEX COM 371901109 105,300 0 0.00 2,178 2.35 0.0820
2019-02-12 2018-12-31 13F GENTEX COM 371901109 105,300 0 0.00 2,128 -5.84 0.0907
2018-11-14 2018-09-30 13F GENTEX COM 371901109 105,300 0 0.00 2,260 -6.77 0.0649
2018-08-15 2018-06-30 13F GENTEX COM 371901109 105,300 0 0.00 2,424 0.00 0.0746
2018-05-14 2018-03-31 13F GENTEX COM 371901109 105,300 0 0.00 2,424 9.88 0.0768
2018-02-15 2017-12-31 13F GENTEX COM 371901109 105,300 0 0.00 2,206 5.80 0.0662
2017-11-15 2017-09-30 13F GENTEX COM 371901109 105,300 0 0.00 2,085 4.35 0.0654
2017-08-15 2017-06-30 13F GENTEX COM 371901109 105,300 -9,200 -8.03 1,998 -18.18 0.0653
2017-05-15 2017-03-31 13F GENTEX COM 371901109 114,500 0 0.00 2,442 8.29 0.0765
2017-02-15 2016-12-31 13F GENTEX COM 371901109 114,500 0 0.00 2,255 12.13 0.0719
2016-11-15 2016-09-30 13F GENTEX COM 371901109 114,500 0 0.00 2,011 13.68 0.0608
2016-08-10 2016-06-30 13F GENTEX COM 371901109 114,500 0 0.00 1,769 -1.56 0.0564
2016-05-17 2016-03-31 13F GENTEX COM 371901109 114,500 0 0.00 1,797 -1.96 0.0561
2016-02-17 2015-12-31 13F GENTEX COM 371901109 114,500 -14,920 -11.53 1,833 -8.62 0.0551
2015-11-17 2015-09-30 13F GENTEX COM 371901109 129,420 0 0.00 2,006 -5.60 0.0646
2015-08-17 2015-06-30 13F GENTEX COM 371901109 129,420 0 0.00 2,125 -10.26 0.0568
2015-05-15 2015-03-31 13F GENTEX COM 371901109 129,420 64,710 100.00 2,368 1.28 0.0571
2015-02-10 2014-12-31 13F GENTEX COM 371901109 64,710 -1,350 -2.04 2,338 12.24 0.0602
2014-11-17 2014-09-30 13F GENTEX COM 371901109 66,060 0 0.00 2,083 8.38 0.0592
2014-08-15 2014-06-30 13F GENTEX COM 371901109 66,060 0 0.00 1,922 -7.73 0.0530
2014-05-20 2014-03-31 13F GENTEX COM 371901109 66,060 0 0.00 2,083 -4.41 0.0592
2014-02-20 2013-12-31 13F GENTEX CORP COM COM 371901109 66,060 1,350 2.09 2,179 25.81 0.0633
2014-11-21 2013-09-30 13F/A-1 GENTEX COM 371901109 64,710 -11,650 -15.26 1,732 -1.59 0.0488
2013-11-20 2013-09-30 13F GENTEX COM 371901109 76,360 1,954
2013-09-26 2013-06-30 13F GENTEX COM 371901109 76,360 76,360 1,760 0.0584
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.