Filer Snapshot

Fairmount Funds Management LLC

CIK 0001802528. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity type

Company

Total filings

58

Latest filing

15 May 2026

Industry

n/a

Filing-backed research brief

Start with the SEC data that changes for this CIK

Latest signal: 13F-HR for Q1 2026. Each card links back to the PortfolioSavvy page where the filing evidence is closest.

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Largest parsed holding

DMRA

$225.67M reported value

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13D/G large stake

VRDN

11 May 2026 · 14% ownership

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Source: SEC Schedule 13D/G

SCHEDULE 13G/A filed on 15 May 2026 for CIK 0001802528.

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Ownership signals CIK-linked ownership evidence from parsed SEC filings. 1 signal
Parsed SEC ownership signals

Parsed SEC ownership coverage

These bars compare filing-backed value available in each disclosure family. Read them as separate lenses, not as one combined ownership total.

13F portfolio$1.38B

Quarterly institutional holdings reported on Form 13F.

Forms 3/4/5 positions$1.44B

Reporting-owner positions with enough filing detail to estimate value.

Latest reported 13F value

13F
$1.38B

Reported market value from the latest parsed Form 13F information table; this is not total assets under management.

Forms 3/4/5 position value

3/4/5
$1.44B

Estimated from parsed Forms 3/4/5 when filings include enough share and price data.

Largest 13F holdings

13F
DMRA DNTH COGT SYRE ORKA
+7 moreVRDN ELVN JBIO CBIO ZBIO APGE IKT

Largest symbols in the latest parsed Form 13F information table.

Largest linked holdings

Largest issuer positions linked to this CIK across parsed 13F, 13D/G, and Forms 3/4/5 records.

COGT DMRA VRDN CBIO ORKA JBIO ZBIO DNTH
+1 moreAPGE

Largest 13F holdings

Largest symbols in the latest parsed Form 13F information table.

DMRA DNTH COGT SYRE ORKA VRDN ELVN JBIO
+4 moreCBIO ZBIO APGE IKT

Largest active 13D stakes

Active large-stake positions disclosed in parsed Schedule 13D filings.

ORKA COGT APGE SYRE VRDN GLTO
+4 moreJBIO DNTH CBIO GLYC

Largest active 13G stakes

Passive or institutional large-stake positions disclosed in parsed Schedule 13G filings.

ELVN ANAB ATXS IKT KNSA
How to read these SEC ownership signals
  • Read each filing family separately: 13F portfolios, 13D/G large stakes, and Forms 3/4/5 owner positions answer different SEC disclosure questions.
  • Open the linked research path when you need the filing, CIK, issuer, or CUSIP trail behind a value.
At a glance Names, identifiers, and filing context for this profile. 1 identity field
Business address
200 Barr Harbor Drive, Suite 400, West Conshohocken, PA, 19428
EDGAR profile Static EDGAR fields kept behind disclosure so the main profile stays readable. 2 profile fields available
Incorporated in
DE
Fiscal year end
31 December

Filer intelligence

What SEC filings say about Fairmount Funds Management 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.

Open 13F portfolio Save filer

Quick read

  • Latest parsed 13F shows $1.38B across 12 reported holdings for Q1 2026.
  • Largest parsed 13F holding: DMRA at $225.67M.
  • 5 recent 13D/G stake rows found; top row is VRDN at 14% ownership.
  • Forms 3/4/5 show insider context for COGT worth $789.38M.

SEC source mix

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

XML parsed
13F portfolio 12 rows

Quarterly institutional portfolio holdings.

Open
13D/G stakes 5 rows

Beneficial ownership and large-stake disclosures.

Open
Forms 3/4/5 5 rows

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

Open

Top parsed 13F holdings

Visual share of the latest parsed 13F portfolio. Values are reported market value, not a recommendation.

Q1 2026 - 15 May 2026

Top 5 concentration

75%

Share of latest parsed 13F value represented by the visible holdings below.

Top 5 reported value

$1.03B

Compared with $1.38B total 13F value.

Top 5 net change

+$124.52M

Position-value change inside the visible top holdings only.

13F concentration map

A simple visual split of the latest parsed 13F portfolio.

Largest add: DMRA · Largest trim: APGE

DMRA DNTH COGT SYRE ORKA Other holdings

DMRA

16.3%

Damora Therapeutics Inc

$225.67M

DNTH

15.4%

Dianthus Therapeutics Inc

$212.92M

COGT

15.3%

Cogent Biosciences Inc

$211.83M

SYRE

14.6%

Spyre Therapeutics Inc

$202.67M

ORKA

13.1%

Oruka Therapeutics Inc

$181.74M

13D/G large-stake context

VRDN

11 May 2026 · Common Stock, $0.01 par value per share

14%
Issuer page 13D/G history

ORKA

30 Apr 2026 · Common Stock, $0.001 par value per share

20%
Issuer page 13D/G history

SYRE

16 Apr 2026 · Common Stock, $0.0001 par value

10%
Issuer page 13D/G history

COGT

31 Mar 2026 · Common Stock, $0.001 par value

8.6%
Issuer page 13D/G history

Forms 3/4/5 insider context

COGT

31 Mar 2026

$789.38M
Issuer page Owner page

DMRA

23 Mar 2026 · 10% owner

$190.12M
Issuer page Owner page

VRDN

11 May 2026 · 10% owner

$172.66M
Issuer page Owner page

CBIO

02 Jun 2026 · 10% owner

$60.56M
Issuer page Owner page

Latest update

What changed recently for Fairmount Funds Management LLC

Ownership report updated

Latest ownership report period: 02 Jun 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

03 Jun 2026

Page type

Ownership filings

Latest period

02 Jun 2026

Ownership context was refreshed from SEC Forms 3/4/5 filed on 03 Jun 2026.

Open ownership filings Browse recent public updates

Benchmark Context

Benchmark context for this company

Fairmount Funds Management 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 ownership report period: 02 Jun 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 0001802528 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
58
First seen
12 Feb 2020
Latest filing
15 May 2026
Entity
Company

Observed form types

13F-HR SCHEDULE 13D SCHEDULE 13D/A SCHEDULE 13G SCHEDULE 13G/A

CIK-linked evidence first

Fairmount Funds Management LLC SEC filings Fairmount Funds Management LLC 13F portfolio Fairmount Funds Management LLC 13D/G history Fairmount Funds Management LLC owner filings Open SEC filing index

Latest Filings

Showing the latest 12 of 58 SEC filings for Fairmount Funds Management LLC.

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SCHEDULE 13G/A

SCHEDULE 13G/A filing

Filing date
15 May 2026
Reporting date
Not listed
SEC evidence
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13F-HR

13F-HR filing

Filing date
15 May 2026
Reporting date
31 Mar 2026
SEC evidence
Open document Open filing
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SCHEDULE 13D/A

SCHEDULE 13D/A filing

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

SCHEDULE 13D/A filing

Filing date
04 May 2026
Reporting date
Not listed
SEC evidence
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SCHEDULE 13D/A

SCHEDULE 13D/A filing

Filing date
20 Apr 2026
Reporting date
Not listed
SEC evidence
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SCHEDULE 13D/A

SCHEDULE 13D/A filing

Filing date
31 Mar 2026
Reporting date
Not listed
SEC evidence
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SCHEDULE 13D/A

SCHEDULE 13D/A filing

Filing date
27 Mar 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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13F-HR

13F-HR filing

Filing date
17 Feb 2026
Reporting date
31 Dec 2025
SEC evidence
Open document Open filing
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SCHEDULE 13D/A

SCHEDULE 13D/A filing

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

SCHEDULE 13D/A filing

Filing date
22 Jan 2026
Reporting date
Not listed
SEC evidence
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Next action
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SCHEDULE 13D/A

SCHEDULE 13D/A filing

Filing date
22 Jan 2026
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
Verify source filing
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