CSPi 10% holder buys 4,600 shares in market

CSP INC (CSPI) reported that stockholder Joseph R. Nerges, a ten percent owner, made a series of open-market purchases of CSPI Common Stock between September 11 and September 15, 2026, totaling 4,600 shares at prices between $7.75 and $7.96 per share.

Rhea-AI Filing Summary

CSP INC (CSPI) reported that stockholder Joseph R. Nerges, a ten percent owner, made a series of open-market purchases of CSPI Common Stock between September 11 and September 15, 2026, totaling 4,600 shares at prices between $7.75 and $7.96 per share. The shares are held directly, no Rule 10b5-1 trading plan is reported, and a prior confidentiality agreement with CSP Inc. dated October 8, 2024 is noted.

Insider Trade Summary

Net Buyer: 4,600 shares

Net Buy 6 txns

Insider NERGES JOSEPH R

Role 10% Owner

Bought 4,600 shs ($36K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	28	$7.90	$221.20
Purchase	Common Stock	472	$7.96	$4K
Purchase	Common Stock	500	$7.90	$4K
Purchase	Common Stock	1,600	$7.75	$12K
Purchase	Common Stock	1,000	$7.85	$8K
Purchase	Common Stock	1,000	$7.90	$8K

Holdings After Transaction: Common Stock — 1,423,500 shares (Direct)

Key Figures

Total shares purchased: 4,600 shares Shares purchased September 11, 2026 (lot 1): 1,600 shares Shares purchased September 11, 2026 (lot 2): 1,000 shares +4 more

7 metrics

Total shares purchased 4,600 shares Net buy transactions reported for September 11–15, 2026

Shares purchased September 11, 2026 (lot 1) 1,600 shares Common Stock bought at $7.75 per share

Shares purchased September 11, 2026 (lot 2) 1,000 shares Common Stock bought at $7.85 per share

Shares purchased September 11, 2026 (lot 3) 1,000 shares Common Stock bought at $7.90 per share

Shares purchased September 14, 2026 500 shares Common Stock bought at $7.90 per share

Shares purchased September 15, 2026 (lot 1) 28 shares Common Stock bought at $7.90 per share

Shares purchased September 15, 2026 (lot 2) 472 shares Common Stock bought at $7.96 per share

Key Terms

ten percent owner, Rule 10b5-1, confidentiality agreement, Common Stock

4 terms

ten percent owner regulatory

"The reporting person is identified as a ten percent owner of CSP INC."

Rule 10b5-1 regulatory

"No Rule 10b5-1 trading plan is reported in connection with these purchases."

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

confidentiality agreement other

"Remarks note a confidentiality agreement with CSP Inc. dated October 8, 2024."

A confidentiality agreement is a legal promise that stops people from sharing sensitive business information — like financial plans, product designs, or deal terms — with others. For investors it matters because such agreements protect value during negotiations and due diligence, reduce the risk of leaks that can move a stock price, and give a clear basis for legal action if important information is exposed.

Common Stock financial

"All reported transactions involve CSPI Common Stock in open-market purchases."

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider trading activity in CSPI was reported in this Form 4?

The filing reports that ten percent owner Joseph R. Nerges bought a total of 4,600 CSPI Common Stock shares in open-market transactions between September 11 and September 15, 2026 at prices from $7.75 to $7.96 per share.

How many CSPI shares did Joseph R. Nerges buy on each date?

On September 11, 2026, he purchased 1,600, 1,000, and 1,000 shares. On September 14, 2026, he purchased 500 shares. On September 15, 2026, he purchased 28 and 472 shares of CSPI Common Stock.

At what prices were the CSPI shares purchased in this Form 4?

The reported CSPI Common Stock purchases were made at per-share prices of $7.75, $7.85, and $7.90 on September 11 and 14, 2026, and at $7.90 and $7.96 per share on September 15, 2026.

Was a Rule 10b5-1 trading plan used for these CSPI insider purchases?

No. The Form 4 indicates that the Rule 10b5-1 checkbox is not selected, so no Rule 10b5-1 trading plan is reported in connection with these CSPI Common Stock purchases.

What is the reporting person’s relationship to CSPI in this Form 4?

The reporting person, Joseph R. Nerges, is identified as a ten percent owner of CSP INC (CSPI) and is not listed as a director or officer of the company in this filing.

What additional agreement involving CSPI is mentioned in the Form 4 remarks?

The remarks state that a confidentiality agreement with CSP Inc. was entered into on October 8, 2024. No further terms or implications of this agreement are described in the filing.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 09/15/2026 - 03:45 PM Accepted by SEC EDGAR 09/15/2026 - 03:45 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

NERGES JOSEPH R

(Last) (First) (Middle)

1726 BUNDY ST

(Street)

SCRANTON PENNSYLVANIA 18508

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
CSP INC /MA/ [ CSPI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/11/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/11/2026		P		1,600	A	$7.75	1,420,500	D
Common Stock	09/11/2026		P		1,000	A	$7.85	1,421,500	D
Common Stock	09/11/2026		P		1,000	A	$7.9	1,422,500	D
Common Stock	09/14/2026		P		500	A	$7.9	1,423,000	D
Common Stock	09/15/2026		P		28	A	$7.9	1,423,028	D
Common Stock	09/15/2026		P		472	A	$7.96	1,423,500	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

Entered into confidentiality agreement with CSP Inc. on October 8, 2024.

	/s/ Joseph R. Nerges	09/15/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)