MFS HIGH YIELD MUNICIPAL TRUST (CMU) Insider Trading & SEC Filings

Updated Jul 16, 2026 · Last SEC filing 2026-06-09

MFS HIGH YIELD MUNICIPAL TRUST (CMU) has filed 2 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-09. InsiderAlpha tracks every CMU SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About MFS HIGH YIELD MUNICIPAL TRUST (CMU)

SEC CIK	0000809844

90-Day SEC Filing Activity

Form 4 filings (90d)	2
Latest Form 4 filing	2026-06-09

Recent CMU Insider Transactions (Form 4)

Date	Insider	Role	Transaction	Shares	Price	Value	Filing
2026-06-08	JPMorgan Chase Bank, N.A.	Insider	J — Other acquisition / disposition	330	—	—	SEC
2026-05-01	JPMorgan Chase Bank, N.A.	Insider	J — Other acquisition / disposition	180	—	—	SEC
2026-01-20	Bulldog Investors, LLP	10% Owner	P — Open-market purchase	678	$3.50	$2K	SEC
2026-01-20	Bulldog Investors, LLP	10% Owner	P — Open-market purchase	678	$3.50	$2K	SEC

All transactions sourced from SEC EDGAR Form 4 filings for MFS HIGH YIELD MUNICIPAL TRUST (CMU). Updated in real time as new filings are submitted to the SEC.

Most-Active CMU Insiders — Last 90 Days

Insider	Form 4 filings	Total transaction value
JPMorgan Chase Bank, N.A.	2	—

Recent Insider Filings

2026-06-09 — JPMorgan Chase Bank, N.A. (Insider)
2026-05-05 — JPMorgan Chase Bank, N.A. (Insider)
2026-04-01 — SCHECHTER GEOFFREY (Insider)
2026-01-23 — Bulldog Investors, LLP (10% Owner)
2026-01-22 — Bulldog Investors, LLP (10% Owner)

Form 4 Transaction Code Reference

SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in CMU insider filings:

P	Open-market purchase by the insider
S	Open-market sale by the insider
A	Grant, award, or other acquisition from the issuer
M	Exercise or conversion of derivative security (e.g. options)
F	Payment of exercise price or tax liability via share withholding
G	Bona-fide gift of securities
D	Disposition to the issuer (e.g. share buyback participation)
J	Other acquisition or disposition
X	Exercise of in-the-money or at-the-money derivative security
C	Conversion of derivative security
V	Transaction voluntarily reported earlier than required

CMU Insider Trading — FAQ

What is the latest insider trade for CMU?: MFS HIGH YIELD MUNICIPAL TRUST (CMU) had 2 insider filings in the last 90 days, with the most recent on 2026-06-09. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying CMU stock?: 0 insider purchases of CMU were filed in the last 90 days.
How many insiders are selling CMU stock?: 0 insider sales of CMU were filed in the last 90 days.
Where can I see CMU SEC filings (Form 4, 10-K, 10-Q, 8-K)?: InsiderAlpha aggregates every CMU SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

Learn More

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