Filer Snapshot

MANCHESTER MANAGEMENT CO LLC

CIK 0001169253. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity type

Company

Total filings

147

Latest filing

12 May 2026

Industry

n/a

Filing-backed research brief

Start with the SEC data that changes for this CIK

Latest signal: 13D/G stake for EPRX. Each card links back to the PortfolioSavvy page where the filing evidence is closest.

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Largest parsed holding

—

Populates from the latest parsed 13F information table.

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13D/G large stake

EPRX

31 Mar 2026 · 7.7% ownership

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Source: SEC Schedule 13D/G

SCHEDULE 13G/A filed on 12 May 2026 for CIK 0001169253.

View Source Filing
Identity 1 fact
Business address
3 West Hill Place, Boston, MA, 02110
SEC ownership signals 4 facts
Ownership coverage

Form 3/4/5 holdings value

$11.55M

Estimated from parsed insider ownership filings when values are disclosed.

Top disclosed positions
MODD SNWV
Schedule 13D positions
SNWV MODD
Schedule 13G positions
EPRX ACOG NMTC
SEC filing record 2 facts
State of incorporation
DE
Fiscal year end
31 December

Filer intelligence

What SEC filings say about MANCHESTER MANAGEMENT CO LLC

A compact read of parsed XML filings. 13F, 13D/G, and Forms 3/4/5 are shown separately because they answer different ownership questions.

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Quick read

  • 5 recent 13D/G stake rows found; top row is EPRX at 7.7% ownership.
  • Forms 3/4/5 show insider context for MODD worth $8.45M.

SEC source mix

Counts show available parsed rows, not one combined ownership total.

XML parsed
13F portfolio No rows yet

Quarterly institutional portfolio holdings.

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13D/G stakes 5 rows

Beneficial ownership and large-stake disclosures.

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Forms 3/4/5 3 rows

Officer, director, and 10% owner holdings or transactions.

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13D/G large-stake context

EPRX

31 Mar 2026 · Common Shares, no par value

7.7%
Issuer page 13D/G history

ACOG

31 Mar 2026 · Common Stock, no par value

4.9%
Issuer page 13D/G history

SNWV

11 Dec 2025 · Common Stock, par value $0.001

11%
Issuer page 13D/G history

MODD

31 Mar 2025 · Common Stock, par value $0.001 per share

10%
Issuer page 13D/G history

Forms 3/4/5 insider context

MODD

24 Apr 2025 · Chief Executive Officer · 10% owner

$8.45M
Issuer page Owner page

SNWV

11 Dec 2025

$3.1M
Issuer page Owner page

BRSF

15 Jun 2022 · 10% owner

Issuer page Owner page

Latest update

What changed recently for MANCHESTER MANAGEMENT CO LLC

New filing available

Latest Schedule 13D/G period: 31 Mar 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

12 May 2026

Page type

Filer profile

Latest period

31 Mar 2026

Schedule 13D/G context is visible from filings filed on 12 May 2026.

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Benchmark Context

Benchmark context for this company

MANCHESTER MANAGEMENT CO LLC has a source-backed company facts view where you can compare the latest reported metrics with its own recent history and with peer rankings for the same metric.

Compared with

Start on the facts page for period-to-period context, then open a metric ranking when you want to compare the same reported fact across other SEC-reporting companies.

Why this is notable

Latest Schedule 13D/G period: 31 Mar 2026. That gives you a fresh baseline before you compare this company with peers.

  • Peer comparisons stay conservative: same metric, compatible units, latest valid company row only.
  • Open the facts page first if you want the cleanest path to verification.

Benchmark context is only shown where the app has enough comparable SEC-backed data to keep the interpretation honest.

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SEC filing record

CIK 0001169253 filing coverage

Start with this filing record, then use the linked ownership pages when parsed 13F, 13D/G, Forms 3/4/5, or facts data exists for this CIK.

SEC filings
147
First seen
15 Mar 2002
Latest filing
12 May 2026
Entity
Company

Observed form types

SCHEDULE 13G/A SCHEDULE 13G SCHEDULE 13D/A 4 4/A SC 13D/A SC 13G/A SC 13D 3 SC 13G

Primary evidence

Open SEC filing index MANCHESTER MANAGEMENT CO LLC SEC filings MANCHESTER MANAGEMENT CO LLC 13D/G history MANCHESTER MANAGEMENT CO LLC owner filings

Latest Filings

Showing the latest 12 of 138 SEC filings for MANCHESTER MANAGEMENT CO LLC.

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SCHEDULE 13G/A

SCHEDULE 13G/A filing

Filing date
12 May 2026
Reporting date
Not listed
SEC evidence
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SCHEDULE 13G/A

SCHEDULE 13G/A filing

Filing date
12 May 2026
Reporting date
Not listed
SEC evidence
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SCHEDULE 13G

SCHEDULE 13G filing

Filing date
17 Feb 2026
Reporting date
Not listed
SEC evidence
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SCHEDULE 13G/A

SCHEDULE 13G/A filing

Filing date
17 Feb 2026
Reporting date
Not listed
SEC evidence
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SCHEDULE 13D/A

SCHEDULE 13D/A filing

Filing date
15 Dec 2025
Reporting date
Not listed
SEC evidence
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4 File 001-42552

4 filing

Filing date
15 Dec 2025
Reporting date
11 Dec 2025
SEC evidence
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4/A File 001-42552

4/A filing

Filing date
11 Dec 2025
Reporting date
08 Dec 2025
SEC evidence
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SCHEDULE 13D/A

SCHEDULE 13D/A filing

Filing date
10 Dec 2025
Reporting date
Not listed
SEC evidence
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4 File 001-42552

4 filing

Filing date
10 Dec 2025
Reporting date
08 Dec 2025
SEC evidence
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SCHEDULE 13G

SCHEDULE 13G filing

Filing date
13 Nov 2025
Reporting date
Not listed
SEC evidence
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4 File 001-41277

4 filing

Filing date
28 Apr 2025
Reporting date
24 Apr 2025
SEC evidence
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SCHEDULE 13D/A

SCHEDULE 13D/A filing

Filing date
07 Apr 2025
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
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