IRIDEX: Xinpo buys 350,557 shares in open market

A ten percent owner reported aggregate beneficial ownership of 1,738,238 shares held through Xinpo and Novel Inspiration.

Rhea-AI Filing Summary

IRIDEX Corp.'s ten percent owner, Lin Shih-Yao David, reported 30 open-market purchases by Xinpo Venture Capital Co., Ltd. totaling 350,557 shares. Xinpo's March 30, 2026 purchase was 7,371 shares at $0.9900. Lin indirectly holds Xinpo shares and controls its entire ownership interest, directly and through family members. No Rule 10b5-1 plan is reported.

The reported aggregate beneficial ownership was 1,738,238 shares: 1,186,809 held through Xinpo and 551,429 through Novel Inspiration International Co., Ltd. The Novel Inspiration holdings reconcile the aggregate ownership figure and are not transactions reported here.

Insider Trade Summary

Net Buyer: 350,557 shares

Net Buy 30 txns

Insider Lin Shih-Yao David

Role 10% Owner

Bought 350,557 shs ($439K)

Type	Security	Shares	Price	Value
Purchase	Common Stock F3, F1	7,371	$0.99	$7K
Purchase	Common Stock F1	4,549	$1.33	$6K
Purchase	Common Stock F1	17,526	$1.33	$23K
Purchase	Common Stock F2, F1	22,805	$1.3099	$30K
Purchase	Common Stock F1	1,682	$1.30	$2K
Purchase	Common Stock F1	967	$1.32	$1K
Purchase	Common Stock F1	752	$1.42	$1K
Purchase	Common Stock F1	1,424	$1.40	$2K
Purchase	Common Stock F1	14,943	$1.41	$21K
Purchase	Common Stock F1	100	$1.38	$138.00
Purchase	Common Stock F1	15,703	$1.43	$22K
Purchase	Common Stock F1	129	$1.46	$188.34
Purchase	Common Stock F2, F1	40,535	$1.4495	$59K
Purchase	Common Stock F1	19,324	$1.41	$27K
Purchase	Common Stock F1	637	$1.49	$949.13
Purchase	Common Stock F1	4,050	$1.48	$6K
Purchase	Common Stock F2, F1	33,013	$1.4847	$49K
Purchase	Common Stock F2, F1	30,000	$1.4798	$44K
Purchase	Common Stock F1	20,000	$1.20	$24K
Purchase	Common Stock F1	1,330	$1.19	$2K
Purchase	Common Stock F1	7,009	$1.15	$8K
Purchase	Common Stock F1	4,031	$1.00	$4K
Purchase	Common Stock F1	14,202	$0.97	$14K
Purchase	Common Stock F1	7,675	$0.99	$8K
Purchase	Common Stock F1	11,404	$0.94	$11K
Purchase	Common Stock F1	20,000	$0.97	$19K
Purchase	Common Stock F1	18,892	$0.935	$18K
Purchase	Common Stock F1	20,000	$0.94	$19K
Purchase	Common Stock F1	10,260	$0.94	$10K
Purchase	Common Stock F1	244	$0.93	$226.92

Holdings After Transaction: Common Stock — 1,186,809 shares (Indirect, By Xinpo)

Footnotes (3)

1. F1. The shares are held directly by Xinpo Venture Capital Co., Ltd. ("Xinpo") and indirectly by the Reporting Person. The Reporting Person controls the entire ownership interest in Xinpo, both directly and through family members, and has a pecuniary interest in the shares held by Xinpo.
2. F2. Each price marked with this footnote is a weighted average price for multiple open-market purchases on the stated date. The execution prices were as follows: 01/23/2026: $1.47 to $1.48, inclusive; 01/27/2026: $1.46 to $1.49, inclusive; 02/05/2026: $1.43 to $1.45, inclusive; 03/17/2026: $1.3099 to $1.31, inclusive. The Reporting Person undertakes to provide IRIDEX CORP, any security holder of IRIDEX CORP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth above.
3. F3. The amount reported in Column 5 reflects the shares held through Xinpo following the reported transaction. As of the date of this report, the Reporting Person beneficially owns an aggregate of 1,738,238 shares of Common Stock, consisting of 1,186,809 shares held through Xinpo and 551,429 shares held through Novel Inspiration International Co., Ltd.("Novel Inspiration"). The Reporting Person is the sole officer, director and stockholder of Novel Inspiration.

Key Figures

Shares purchased: 350,557 shares Purchase transactions: 30 purchases Shares purchased: 7,371 shares +4 more

7 metrics

Shares purchased 350,557 shares Across 30 reported open-market purchases by Xinpo

Purchase transactions 30 purchases Open-market purchases by Xinpo

Shares purchased 7,371 shares Xinpo purchase on March 30, 2026

Price per share $0.9900 Xinpo purchase on March 30, 2026

Aggregate beneficial ownership 1,738,238 shares Lin Shih-Yao David

Shares held through Xinpo 1,186,809 shares Included in aggregate beneficial ownership

Shares held through Novel Inspiration 551,429 shares Included in aggregate beneficial ownership

Key Terms

open-market purchases, weighted average price, pecuniary interest, beneficial ownership

4 terms

open-market purchases financial

"previously unreported open-market purchases"

Open-market purchases are when a company or institution buys its own shares or other securities using the public stock market rather than through a private deal. For investors this matters because such buying reduces the number of shares available, often boosting metrics like earnings per share and signaling management thinks the stock is undervalued, while also using cash that might otherwise fund growth or dividends — like a business buying back chips at the table to increase each remaining player's stake.

weighted average price financial

"Each price marked with this footnote is a weighted average price"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

pecuniary interest technical

"has a pecuniary interest in the shares held by Xinpo"

beneficial ownership technical

"reconcile the Reporting Person's aggregate beneficial ownership"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

FAQ

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

How many IRIX shares did Xinpo purchase?

Xinpo Venture Capital Co., Ltd. made 30 open-market purchases totaling 350,557 shares. The shares were held directly by Xinpo and indirectly by Lin Shih-Yao David, a ten percent owner; no Rule 10b5-1 plan is reported.

How many IRIX shares did the ten percent owner beneficially own?

Lin Shih-Yao David, the ten percent owner, beneficially owned 1,738,238 shares, including 1,186,809 held through Xinpo and 551,429 held through Novel Inspiration International Co., Ltd. The Novel Inspiration shares reconcile the aggregate ownership figure and were not transactions reported here.

What was Xinpo's IRIX purchase price on March 17, 2026?

Xinpo purchased 22,805 shares at a weighted average price of $1.3099 on March 17, 2026. The execution prices ranged from $1.3099 to $1.31, inclusive.

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

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 10/07/2026 - 06:10 AM Accepted by SEC EDGAR 10/07/2026 - 06:10 AM 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^*

Lin Shih-Yao David

(Last) (First) (Middle)

VISTRA CORPORATE SERVICES CENTER

WICKHAMS CAY II

(Street)

ROAD TOWN, TORTOLA VG1110

(City) (State) (Zip)

VIRGIN ISLANDS, BRITISH

(Country)

2. Issuer Name and Ticker or Trading Symbol
IRIDEX CORP [ IRIX ]

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)
03/25/2025

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	12/03/2025		P		244	A	$0.93	836,496	I	By Xinpo(1)
Common Stock	12/05/2025		P		10,260	A	$0.94	846,756	I	By Xinpo(1)
Common Stock	12/09/2025		P		20,000	A	$0.94	866,756	I	By Xinpo(1)
Common Stock	12/10/2025		P		18,892	A	$0.935	885,648	I	By Xinpo(1)
Common Stock	12/12/2025		P		20,000	A	$0.97	905,648	I	By Xinpo(1)
Common Stock	12/15/2025		P		11,404	A	$0.94	917,052	I	By Xinpo(1)
Common Stock	12/16/2025		P		7,675	A	$0.99	924,727	I	By Xinpo(1)
Common Stock	12/19/2025		P		14,202	A	$0.97	938,929	I	By Xinpo(1)
Common Stock	12/22/2025		P		4,031	A	$1	942,960	I	By Xinpo(1)
Common Stock	12/30/2025		P		7,009	A	$1.15	949,969	I	By Xinpo(1)
Common Stock	01/07/2026		P		1,330	A	$1.19	951,299	I	By Xinpo(1)
Common Stock	01/08/2026		P		20,000	A	$1.2	971,299	I	By Xinpo(1)
Common Stock	01/23/2026		P		30,000	A	$1.4798(2)	1,001,299	I	By Xinpo(1)
Common Stock	01/27/2026		P		33,013	A	$1.4847(2)	1,034,312	I	By Xinpo(1)
Common Stock	01/30/2026		P		4,050	A	$1.48	1,038,362	I	By Xinpo(1)
Common Stock	02/02/2026		P		637	A	$1.49	1,038,999	I	By Xinpo(1)
Common Stock	02/04/2026		P		19,324	A	$1.41	1,058,323	I	By Xinpo(1)
Common Stock	02/05/2026		P		40,535	A	$1.4495(2)	1,098,858	I	By Xinpo(1)
Common Stock	02/09/2026		P		129	A	$1.46	1,098,987	I	By Xinpo(1)
Common Stock	02/11/2026		P		15,703	A	$1.43	1,114,690	I	By Xinpo(1)
Common Stock	02/12/2026		P		100	A	$1.38	1,114,790	I	By Xinpo(1)
Common Stock	02/23/2026		P		14,943	A	$1.41	1,129,733	I	By Xinpo(1)
Common Stock	03/02/2026		P		1,424	A	$1.4	1,131,157	I	By Xinpo(1)
Common Stock	03/03/2026		P		752	A	$1.42	1,131,909	I	By Xinpo(1)
Common Stock	03/12/2026		P		967	A	$1.32	1,132,876	I	By Xinpo(1)
Common Stock	03/16/2026		P		1,682	A	$1.3	1,134,558	I	By Xinpo(1)
Common Stock	03/17/2026		P		22,805	A	$1.3099(2)	1,157,363	I	By Xinpo(1)
Common Stock	03/23/2026		P		17,526	A	$1.33	1,174,889	I	By Xinpo(1)
Common Stock	03/24/2026		P		4,549	A	$1.33	1,179,438	I	By Xinpo(1)
Common Stock	03/30/2026		P		7,371	A	$0.99	1,186,809(3)	I	By Xinpo(1)

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:

1. The shares are held directly by Xinpo Venture Capital Co., Ltd. ("Xinpo") and indirectly by the Reporting Person. The Reporting Person controls the entire ownership interest in Xinpo, both directly and through family members, and has a pecuniary interest in the shares held by Xinpo.

2. Each price marked with this footnote is a weighted average price for multiple open-market purchases on the stated date. The execution prices were as follows: 01/23/2026: $1.47 to $1.48, inclusive; 01/27/2026: $1.46 to $1.49, inclusive; 02/05/2026: $1.43 to $1.45, inclusive; 03/17/2026: $1.3099 to $1.31, inclusive. The Reporting Person undertakes to provide IRIDEX CORP, any security holder of IRIDEX CORP, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth above.

3. The amount reported in Column 5 reflects the shares held through Xinpo following the reported transaction. As of the date of this report, the Reporting Person beneficially owns an aggregate of 1,738,238 shares of Common Stock, consisting of 1,186,809 shares held through Xinpo and 551,429 shares held through Novel Inspiration International Co., Ltd.("Novel Inspiration"). The Reporting Person is the sole officer, director and stockholder of Novel Inspiration.

Remarks:

This Form 4 is the third of three Form 4 filings being filed solely by the Reporting Person to report previously unreported open-market purchases of the Issuer's Common Stock by Xinpo from March 25, 2025 through March 30, 2026. The transactions are divided among three Form 4 filings because SEC's EDGAR filing system permits no more than 30 entries in Table I. The Reporting Person's holdings through Novel Inspiration are disclosed in the Explanation of Responses solely to reconcile the Reporting Person's aggregate beneficial ownership and do not represent transactions reported on this Form 4. This Form 4 is being filed late.

	/s/ Lin Shih-Yao David	10/07/2026
	** 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)