CSPI 10% owner buys 3,370 shares in open market

CSP Inc. ten percent owner Joseph R. Nerges reported a series of open-market purchases of the company’s Common Stock.

Rhea-AI Filing Summary

CSP Inc. ten percent owner Joseph R. Nerges reported a series of open-market purchases of the company’s Common Stock. Across seven non-derivative transactions from June 8–10, 2026, he bought a total of 3,370 shares at prices ranging from $8.049 to $8.75 per share. Following these purchases, his directly held position in CSP Inc. increased to 1,418,900 shares of Common Stock.

Insider Trade Summary

Net Buyer: 3,370 shares

Net Buy 7 txns

Insider NERGES JOSEPH R

Role 10% Owner

Bought 3,370 shs ($29K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	71	$8.295	$588.95
Purchase	Common Stock	100	$8.32	$832.00
Purchase	Common Stock	700	$8.69	$6K
Purchase	Common Stock	199	$8.049	$2K
Purchase	Common Stock	1,000	$8.75	$9K
Purchase	Common Stock	500	$8.60	$4K
Purchase	Common Stock	800	$8.4025	$7K

Holdings After Transaction: Common Stock — 1,418,900 shares (Direct)

Key Figures

Total shares purchased: 3,370 shares Purchase price range: $8.049–$8.75 per share Holdings after transactions: 1,418,900 shares +3 more

6 metrics

Total shares purchased 3,370 shares Aggregate Common Stock bought across seven transactions

Purchase price range $8.049–$8.75 per share Range of reported open-market purchase prices

Holdings after transactions 1,418,900 shares Common Stock directly owned following latest purchase

Largest single-day buy 1,000 shares Common Stock purchase at $8.75 on June 8, 2026

Earliest transaction date June 8, 2026 Start of reported open-market purchases

Latest transaction date June 10, 2026 Most recent reported open-market purchase

Key Terms

open-market purchase, ten percent owner, Common Stock, non-derivative

4 terms

open-market purchase financial

"transaction_action: "open-market purchase""

An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.

ten percent owner financial

"is_ten_percent_owner: 1 for Joseph R. Nerges"

Common Stock financial

"security_title: "Common Stock" for all transactions"

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.

non-derivative financial

"transaction_type: "non-derivative" on each line"

FAQ

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

What insider transaction did Joseph R. Nerges report for CSPI on this Form 4?

Joseph R. Nerges reported buying CSP Inc. Common Stock in multiple open-market transactions. The filing shows seven non-derivative purchases of Common Stock over three days, increasing his direct holdings to 1,418,900 shares after the reported trades.

How many CSPI shares did Joseph R. Nerges buy and over what dates?

He bought a total of 3,370 CSP Inc. Common Stock shares. The purchases occurred over three trading days, specifically on June 8, June 9, and June 10, 2026, according to the transaction dates disclosed in the Form 4.

At what prices did Joseph R. Nerges purchase CSPI Common Stock?

The reported purchase prices ranged from $8.049 to $8.75 per share. Individual transactions show prices including $8.049, $8.295, $8.32, $8.4025, $8.60, $8.69, and $8.75, reflecting multiple small open-market buys around those price levels.

What is Joseph R. Nerges’s CSPI share ownership after these transactions?

After the reported purchases, Joseph R. Nerges directly owned 1,418,900 shares of CSP Inc. Common Stock. This post-transaction balance is shown in the Form 4 as the total shares following the most recent reported open-market purchase.

Were the CSPI insider transactions by Joseph R. Nerges derivative or non-derivative?

All reported transactions were in non-derivative Common Stock. The filing characterizes each as a non-derivative, open-market purchase of CSP Inc. Common Stock, with no accompanying derivative exercises or conversions disclosed in the transaction data.

What is Joseph R. Nerges’s status in relation to CSP Inc.?

The filing identifies Joseph R. Nerges as a ten percent owner of CSP Inc. This means he is reported as beneficially owning at least ten percent of the company’s outstanding equity, which requires ongoing Form 4 reporting of his transactions.

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

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Accepted by SEC EDGAR 06/10/2026 - 03:38 PM EDT 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)
06/08/2026

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	06/08/2026		P		1,000	A	$8.75	1,416,530	D
Common Stock	06/08/2026		P		500	A	$8.6	1,417,030	D
Common Stock	06/08/2026		P		800	A	$8.4025	1,417,830	D
Common Stock	06/09/2026		P		700	A	$8.69	1,418,530	D
Common Stock	06/09/2026		P		199	A	$8.049	1,418,729	D
Common Stock	06/10/2026		P		71	A	$8.295	1,418,800	D
Common Stock	06/10/2026		P		100	A	$8.32	1,418,900	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	06/10/2026
	** 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)