Dimensional Fund Advisors Lp ownership in CSPI / CSP Inc.

CSP Inc.

US ˙ NasdaqGM ˙ US1263891053

Security	CSPI / CSP Inc.
Institution	Dimensional Fund Advisors Lp
Latest Disclosed Ownership	420,326 shares
Ownership	4.30%

2025-04-15 - Dimensional Fund Advisors Lp has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 420,326 shares of CSP Inc. (US:CSPI). This represents 4.3 percent ownership of the company. In their previous filing dated 2024-02-09 , Dimensional Fund Advisors Lp had reported owning 267,209 shares, indicating an increase of 57.30 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File Date	Effective Date	Form	Prev Shares	Latest Shares	ΔShares (Percent)	Ownership (Percent)	ΔOwnership (Percent)
2025-04-15	2025-04-15	13G/A	267,209	420,326	57.30	4.30	-24.56
2024-02-09	2024-02-09	13G/A	265,584	267,209	0.61	5.70	-1.72
2023-02-10	2023-02-10	13G/A	264,062	265,584	0.58	5.80	-3.33
2022-02-08	2022-02-08	13G/A	283,641	264,062	-6.90	6.00	-9.09
2021-02-12	2021-02-12	13G/A	295,630	283,641	-4.06	6.60	-7.04
2020-02-12	2020-02-12	13G/A	305,138	295,630	-3.12	7.10	-6.46
2019-02-08	2019-02-08	13G/A	298,612	305,138	2.19	7.59	-0.26
2018-02-09	2018-02-09	13G/A	303,089	298,612	-1.48	7.61	-4.40
2017-02-09	2017-02-09	13G/A	296,620	303,089	2.18	7.96	-1.00
2016-02-09	2016-02-09	13G/A		296,620		8.04
2015-02-05	2015-02-05	13G/A		295,862		8.09
2014-02-10	2014-02-10	13G/A		291,476		8.16
2013-02-11	2013-02-11	13G/A		291,476		8.58
2012-02-14	2012-02-14	13G/A		297,073		8.75

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-05-07	2026-03-31	13F	CSP	COM	126389105	360,053	-9,495	-2.57	3,114	-32.58	0.0001
2026-02-12	2025-12-31	13F	CSP	COM	126389105	369,548	-8,727	-2.31	4,620	5.72	0.0010
2025-11-12	2025-09-30	13F	CSP	COM	126389105	378,275	-20,237	-5.08	4,369	-15.25	0.0009
2025-08-12	2025-06-30	13F	CSP	COM	126389105	398,512	-21,814	-5.19	5,156	-20.04	0.0012
2025-05-13	2025-03-31	13F	CSP	COM	126389105	420,326	-68,465	-14.01	6,448	-17.92	0.0016
2025-02-13	2024-12-31	13F	CSP	COM	126389105	488,791	-7,225	-1.46	7,855	21.92	0.0019
2024-11-07	2024-09-30	13F	CSP	COM	126389105	496,016	-7,502	-1.49	6,443	-14.12	0.0016
2024-08-09	2024-06-30	13F	CSP	COM	126389105	503,518	-1,516	-0.30	7,502	-19.52	0.0020
2024-05-10	2024-03-31	13F	CSP	COM	126389105	505,034	237,825	89.00	9,323	74.44	0.0025
2024-02-07	2023-12-31	13F	CSP	COM	126389105	267,209	6,861	2.64	5,344	17.30	0.0016
2023-11-09	2023-09-30	13F	CSP	COM	126389105	260,348	6,374	2.51	4,556	50.66	0.0015
2023-08-09	2023-06-30	13F	CSP	COM	126389105	253,974	-14,984	-5.57	3,025	-17.13	0.0010
2023-05-12	2023-03-31	13F	CSP	COM	126389105	268,958	3,374	1.27	3,650	182,350.00	0.0012
2023-02-09	2022-12-31	13F	CSP	COM	126389105	265,584	28	0.01	3	-99.90	0.0007
2022-11-10	2022-09-30	13F	CSP	COM	126389105	265,556	486	0.18	1,909	-20.85	0.0007
2022-08-12	2022-06-30	13F	CSP	COM	126389105	265,070	994	0.38	2,412	17.09	0.0009
2022-05-13	2022-03-31	13F	CSP	COM	126389105	264,076	14	0.01	2,060	-11.25	0.0006
2022-02-09	2021-12-31	13F	CSP	COM	126389105	264,062	-15,379	-5.50	2,321	-6.56	0.0007
2021-11-12	2021-09-30	13F	CSP	COM	126389105	279,441	-3,456	-1.22	2,484	-17.94	0.0008
2021-08-12	2021-06-30	13F	CSP	COM	126389105	282,897	-944	-0.33	3,027	22.60	0.0010
2021-05-14	2021-03-31	13F	CSP	COM	126389105	283,841	200	0.07	2,469	12.59	0.0008
2021-03-08	2020-12-31	13F/A-2	CSP	COM	126389105	283,641	-7,699	-2.64	2,193	-12.77	0.0008
2021-02-11	2020-12-31	13F	CSP	COM	126389105	283,641	-7,699		2,193		791.9950
2020-11-12	2020-09-30	13F	CSP	COM	126389105	291,340	0	0.00	2,514	6.26	0.0011
2020-08-13	2020-06-30	13F	CSP	COM	126389105	291,340	-2,875	-0.98	2,366	15.02	0.0010
2020-05-14	2020-03-31	13F	CSP	COM	126389105	294,215	-1,415	-0.48	2,057	-46.68	0.0011
2020-02-14	2019-12-31	13F	CSP	COM	126389105	295,630	-5,708	-1.89	3,858	-5.09	0.0014
2019-11-12	2019-09-30	13F	CSP	COM	126389105	301,338	0	0.00	4,065	-11.53	0.0016
2019-08-13	2019-06-30	13F	CSP	COM	126389105	301,338	-3,800	-1.25	4,595	39.28	0.0018
2019-08-12	2019-03-31	13F/A-2	CSP	COM	126389105	305,138	0	0.00	3,299	10.67	0.0013
2019-05-10	2019-03-31	13F	CSP	COM	126389105	305,138	0		3,299
2019-02-26	2018-12-31	13F/A-1	CSP	COM	126389105	305,138	-1,984	-0.65	2,981	-26.01	0.0014
2019-02-13	2018-12-31	13F	CSP	COM	126389105	305,138	-1,984		2,981
2018-11-13	2018-09-30	13F	CSP	COM	126389105	307,122	-286	-0.09	4,029	33.06	0.0015
2018-08-10	2018-06-30	13F	CSP	COM	126389105	307,408	1,100	0.36	3,028	-8.05	0.0012
2018-05-11	2018-03-31	13F	CSP	COM	126389105	306,308	7,696	2.58	3,293	-30.60	0.0014
2018-02-12	2017-12-31	13F	CSP	COM	126389105	298,612	-1,107	-0.37	4,745	44.44	0.0020
2017-11-13	2017-09-30	13F	CSP	COM	126389105	299,719	-3,775	-1.24	3,285	0.67	0.0014
2017-08-11	2017-06-30	13F	CSP	COM	126389105	303,494	0	0.00	3,263	4.28	0.0015
2017-05-12	2017-03-31	13F	CSP	COM	126389105	303,494	405	0.13	3,129	-2.43	0.0015
2017-02-09	2016-12-31	13F	CSP	COM	126389105	303,089	3,377	1.13	3,207	5.22	0.0016
2016-11-10	2016-09-30	13F	CSP	COM	126389105	299,712	3,092	1.04	3,048	26.53	0.0016
2016-08-09	2016-06-30	13F	CSP	COM	126389105	296,620	0	0.00	2,409	35.34	0.0014
2016-05-13	2016-03-31	13F	CSP	COM	126389105	296,620	0	0.00	1,780	-13.55	0.0011
2016-02-10	2015-12-31	13F	CSP	COM	126389105	296,620	0	0.00	2,059	29.25	0.0013
2015-11-13	2015-09-30	13F	CSP	COM	126389105	296,620	0	0.00	1,593	-22.67	0.0010
2015-08-14	2015-06-30	13F	CSP	COM	126389105	296,620	758	0.26	2,060	2.69	0.0013
2015-05-14	2015-03-31	13F	CSP	COM	126389105	295,862	0	0.00	2,006	-8.36	0.0013
2015-02-06	2014-12-31	13F	CSP	COM	126389105	295,862	4,986	1.71	2,189	-5.57	0.0014
2014-11-13	2014-09-30	13F	CSP	COM	126389105	290,876	0	0.00	2,318	15.15	0.0016
2014-08-08	2014-06-30	13F	CSP	COM	126389105	290,876	-600	-0.21	2,013	-11.48	0.0014
2014-05-14	2014-03-31	13F	CSP	COM	126389105	291,476	0	0.00	2,274	-3.32	0.0017
2014-02-12	2013-12-31	13F	CSP	COM	126389105	291,476	0	0.00	2,352	14.12	0.0018
2013-11-13	2013-09-30	13F	CSP	COM	126389105	291,476	0	0.00	2,061	-20.36	0.0018
2013-08-15	2013-06-30	13F	CSP	COM	126389105	291,476	291,476		2,588		0.0024

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.