Filer Snapshot

James N. Topper

CIK 0001341382. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity type

Individual

Total filings

12

Latest filing

30 May 2023

Industry

n/a

Filing-backed research brief

Start with the SEC data that changes for this CIK

Latest signal: 13D/G stake for PHAT. 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

PHAT

01 Nov 2025 · 8.6% ownership

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Source: SEC Forms 3/4/5

4 filed on 30 May 2023 for CIK 0001341382.

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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.

Forms 3/4/5 positions$229.07M

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

Forms 3/4/5 position value

3/4/5
$229.07M

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

Largest linked holdings

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

NAMS PHAT ANAB
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
550 Hamilton Avenue, Suite 100, Palo Alto, CA, 94301

Filer intelligence

What SEC filings say about James N. Topper

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

  • 1 recent 13D/G stake row found; top row is PHAT at 8.6% ownership.
  • Forms 3/4/5 show insider context for NAMS worth $162.8M.

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 1 rows

Beneficial ownership and large-stake disclosures.

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Forms 3/4/5 4 rows

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

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13D/G large-stake context

PHAT

01 Nov 2025 · Common Stock, $0.0001 par value per share

8.6%
Issuer page 13D/G history

Forms 3/4/5 insider context

NAMS

15 Sep 2025

$162.8M
Issuer page Owner page

PHAT

19 May 2026 · 10% owner

$66.19M
Issuer page Owner page

ANAB

06 Jan 2023 · 10% owner

$85.1K
Issuer page Owner page

ALPN

18 May 2024

$0
Issuer page Owner page

Latest update

What changed recently for James N. Topper

Ownership report updated

Latest ownership report period: 19 May 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

21 May 2026

Page type

Ownership filings

Latest period

19 May 2026

Ownership context was refreshed from SEC Forms 3/4/5 filed on 21 May 2026.

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SEC filing record

CIK 0001341382 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
12
First seen
12 May 2021
Latest filing
30 May 2023
Entity
Individual

Observed form types

3 4

CIK-linked evidence first

James N. Topper SEC filings James N. Topper 13D/G history James N. Topper owner filings Open SEC filing index

Latest Filings

Showing the latest 12 of 12 SEC filings for James N. Topper.

4

4 filing

Filing date
30 May 2023
Reporting date
25 May 2023
SEC evidence
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4

4 filing

Filing date
10 Jan 2023
Reporting date
06 Jan 2023
SEC evidence
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4

4 filing

Filing date
05 Jan 2023
Reporting date
03 Jan 2023
SEC evidence
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4

4 filing

Filing date
26 Sep 2022
Reporting date
22 Sep 2022
SEC evidence
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4

4 filing

Filing date
09 Aug 2022
Reporting date
05 Aug 2022
SEC evidence
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4

4 filing

Filing date
03 May 2022
Reporting date
03 May 2022
SEC evidence
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3

3 filing

Filing date
28 Apr 2022
Reporting date
28 Apr 2022
SEC evidence
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4

4 filing

Filing date
15 Feb 2022
Reporting date
11 Feb 2022
SEC evidence
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4

4 filing

Filing date
14 Feb 2022
Reporting date
10 Feb 2022
SEC evidence
Open document Open filing
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4

4 filing

Filing date
04 Jan 2022
Reporting date
03 Jan 2022
SEC evidence
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4

4 filing

Filing date
21 Sep 2021
Reporting date
17 Sep 2021
SEC evidence
Open document Open filing
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4

4 filing

Filing date
12 May 2021
Reporting date
10 May 2021
SEC evidence
Open document Open filing
Next action
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