485BPOS Filing: Eaton Vance Special Investment Trust Updates
Eaton Vance Special Investment Trust filed a 485BPOS on Oct. 5, 2026. Here is what the post-effective amendment is, what the listing shows and what to watch.
The news: Eaton Vance Special Investment Trust (CIK 0000031266) filed a 485BPOS with the SEC on Monday, Oct. 5, 2026. EDGAR shows the submission was posted at 8:46 a.m. Eastern under accession number 0001133228-26-013109. The filing package is about 9 MB, which points to a sizable document set rather than a brief notice.
Why it matters: A 485BPOS is a post-effective amendment to a fund’s registration statement, filed under Rule 485(b). Fund companies commonly use it to bring a prospectus and statement of additional information up to date, for example with annual refreshes or other changes that don’t require extended SEC review. Investors, advisors and analysts track these filings because they are where fee tables, strategy descriptions, risk disclosures and share-class details are formally updated. Among ETF filings and mutual fund filings generally, this type is routine, but the content can still hold details worth reading.
The public listing does not say which series or share classes the amendment covers, and it does not summarize what changed. Nothing in the feed item points to a new product, a fee change, a strategy shift or a closure. Any such conclusion would be speculation until the documents themselves are reviewed.
By the numbers:
- Filing type: 485BPOS
- Filer: Eaton Vance Special Investment Trust (CIK 0000031266)
- Filed: Oct. 5, 2026
- Accession number: 0001133228-26-013109
- Package size: about 9 MB
The big picture: Amendments like this are the steady background of the fund industry. Trusts that house several series often file one combined 485BPOS, so a single submission can touch many funds at once. That is a plausible reason for the package’s size, though the listing doesn’t confirm it. Because the filing doesn’t identify its scope, the useful work is in the details: expense ratios, fee waivers, portfolio manager listings, principal investment strategies and any new or renamed share classes. Those changes tend to show up in the text before they appear in marketing materials or on fund data sites.
What’s next: Readers who follow this trust should open the main prospectus and statement of additional information in the filing index and compare them with the prior versions. Watch for the effective date and for any supplements the trust files afterward, since stickered updates often follow an amendment. Etfo Digest will cover any substantive changes, such as new series, fee adjustments or structural shifts, once they are confirmed in the filed documents.
Prepared with AI assistance from public sources and reviewed under our editorial policy. Not investment advice.