MEGACHIPS CORP /FI trims SiTime (SITM) stake with 400K-share sale

Rhea-AI Filing Summary

MEGACHIPS CORP /FI, a ten percent owner of SiTime Corp, reported an open-market sale of 400,000 shares of Common Stock on May 14, 2026 at an average price of $779.50 per share. After this transaction, the reporting holder still owns 3,020,000 shares directly, so it remains a large shareholder despite the sizable sale.

Insights

Equity ownership and insider-trading analyst

Large shareholder trims stake but keeps substantial position in SiTime.

MEGACHIPS CORP /FI, identified as a ten percent owner of SiTime Corp, executed an open-market sale of 400,000 Common Stock shares at $779.50 per share. This is a straightforward discretionary sale, with no derivative exercises or tax-withholding mechanics disclosed.

Following the transaction, the holder still owns 3,020,000 shares directly, indicating it retains a significant equity interest. There are no remaining derivatives listed in this filing, so the position now consists entirely of common shares as reported.

The filing does not reference any Rule 10b5-1 trading plan or related entity structures, suggesting the sale reflects a direct ownership adjustment. Future ownership levels and any additional trades, when disclosed in subsequent filings, will further clarify the holder’s long-term positioning.

Insider Trade Summary

Net Seller: 400,000 shares ($311,800,000)

Net Sell 1 txn

Insider MEGACHIPS CORP /FI

Role null

Sold 400,000 shs ($311.80M)

Type	Security	Shares	Price	Value
Sale	Common Stock	400,000	$779.50	$311.80M

Holdings After Transaction: Common Stock — 3,020,000 shares (Direct, null)

Footnotes (1)

Key Figures

Shares sold: 400,000 shares Average sale price: $779.50 per share Approximate sale value: $311.8M +3 more

6 metrics

Shares sold 400,000 shares Open-market sale of SiTime Common Stock on May 14, 2026

Average sale price $779.50 per share Price received in the reported open-market sale

Approximate sale value $311.8M 400,000 shares sold at $779.50 per share

Shares held after sale 3,020,000 shares Direct ownership of SiTime Common Stock following transaction

Transaction code S (sale) Non-derivative open-market or private sale of Common Stock

Net share change -400,000 shares Net selling direction in transaction summary

Key Terms

open-market sale, ten percent owner, non-derivative, Form 4

4 terms

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

ten percent owner regulatory

"MEGACHIPS CORP /FI is marked as a ten percent owner"

non-derivative financial

"transaction_type": "non-derivative""

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Form 4 Insider Transactions: What Each Field Means →

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^*

MEGACHIPS CORP /FI

(Last) (First) (Middle)

1-1-1 MIYAHARA, YODOGAWA-KU

(Street)

OSAKA 532-0003

(City) (State) (Zip)

JAPAN

(Country)

2. Issuer Name and Ticker or Trading Symbol
SITIME Corp [ SITM ]

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)
05/14/2026

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	05/14/2026		S		400,000	D	$779.5	3,020,000	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:

	/s/ Tetsuo Hikawa, CEO of MegaChips Corporation	05/18/2026
	** 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)

FAQ

What did MEGACHIPS CORP /FI report in its latest Form 4 for SiTime Corp (SITM)?

MEGACHIPS CORP /FI reported selling 400,000 shares of SiTime Corp Common Stock in an open-market transaction. The sale occurred on May 14, 2026 at an average price of $779.50 per share, and was disclosed as a non-derivative transaction.

How many SiTime Corp (SITM) shares did MEGACHIPS CORP /FI retain after the reported sale?

After the reported sale, MEGACHIPS CORP /FI held 3,020,000 shares of SiTime Corp Common Stock directly. This means that despite selling 400,000 shares, it continues to own a large position and remains a significant shareholder based on this filing.

What was the value of MEGACHIPS CORP /FI’s SiTime Corp (SITM) share sale reported on Form 4?

The sale involved 400,000 shares at an average price of $779.50, implying proceeds of about $311.8 million. This figure is calculated directly from the disclosed share count and price and reflects a sizable open-market disposal by a ten percent owner.

Was MEGACHIPS CORP /FI’s SiTime Corp (SITM) transaction an open-market sale or a derivative exercise?

The transaction was an open-market sale of Common Stock, coded as “S” on the Form 4. The filing classifies it as a non-derivative transaction, with no exercise or conversion price and no remaining derivative positions shown in the derivative summary.

Does MEGACHIPS CORP /FI still qualify as a ten percent owner of SiTime Corp (SITM) after this Form 4?

The Form 4 identifies MEGACHIPS CORP /FI as a ten percent owner and shows it holding 3,020,000 shares after the sale. The filing continues to classify it in that role, indicating significant ongoing ownership based on the reported post-transaction position.