Comparable stake leader
Omid Farokhzad
SEC ownership of Seer, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001726445.
Disclosed value leader
Omid Farokhzad
Comparable rows
50/50
Latest evidence
12 Apr 2026
- Public ticker
- SEER on Nasdaq
- Parsed ownership sources
- 13D/G, 3/4/5, and 13F
- Largest SEC-reported holder
- Omid Farokhzad
- Latest 13D/G holder
- Omid Farokhzad
- Latest parsed ownership date
- 12 Apr 2026
- Issuer CIK
- 0001726445
- Issuer location
- Redwood City, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Seer, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Omid Farokhzad
Disclosed value leader
Omid Farokhzad
Comparable rows
50/50
Latest evidence
12 Apr 2026
13D/G
3/4/5
13F
Lead comparable stake: 12%
13D/G row: Omid Farokhzad
Showing 1-8 of 50 holder rows.
Quick read
Omid Farokhzad leads the comparable SEC ownership view at 12%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Omid Farokhzad's linked filing trail.
Comparable ownership
Top 5
Omid Farokhzad
12%
Schindel Yair Chaim
8.4%
Bradley L. Radoff
4.6%
Invus Global Management, LLC
4.4%
SOFTBANK GROUP CORP.
8.9%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Omid Farokhzad |
13D/G
3/4/5
CEO AND CHAIR, Director
|
12%
|
$11,692,657
6,918,732 shares
|
+$3,878,006 | 31 Mar 2026 |
| Schindel Yair Chaim |
13D/G
|
8.4%
|
$8,320,201
4,923,196 shares
|
$0 | 31 Dec 2024 |
| Bradley L. Radoff |
13D/G
Radoff Bradley Louis
|
4.6%
|
$4,489,599
2,610,232 shares
|
$0 | 12 Apr 2026 |
| Invus Global Management, LLC |
13D/G
Invus Public Equities, L.P.
|
4.4%
|
$4,155,157
2,458,673 shares
|
$0 | 31 Mar 2026 |
| SOFTBANK GROUP CORP. |
13F
Company
|
8.9%
|
$8,627,443
5,135,383 shares
|
— | 31 Mar 2026 |
| Siren, L.L.C. |
13F
Individual
|
4.3%
|
$4,130,571
2,458,673 shares
|
— | 31 Mar 2026 |
| ACADIAN ASSET MANAGEMENT LLC |
13F
Company
|
3.6%
|
$3,484,000
2,074,709 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
3.4%
|
$3,291,113
1,958,996 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$302,925.
Buys
$0
Insiders: 0
Sells
$302,925
Insiders: 3
Net
-$302,925
Shares: -151,138
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 151,138
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 7,303 | $0 | $12,352 | -$12,352 |
| 3-6 | 0 | 32,128 | $0 | $64,092 | -$64,092 |
| 6-9 | 0 | 40,635 | $0 | $80,108 | -$80,108 |
| 9-12 | 0 | 71,072 | $0 | $146,373 | -$146,373 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-19 of 19 reporting-owner rows connected to Seer, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
19
Largest Forms 3/4/5 holder
Omid Farokhzad
Net 12M change
-$302,925
Latest report
20 May 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Omid Farokhzad | CEO AND CHAIR, Director | $10,682,437 | -$184,837 | -1.7% | Mixed | 18 Feb 2026 |
| aMoon Growth Fund Limited Partnership | 10%+ Owner | $8,345,310 | Mixed | 09 Jun 2021 | ||
| Robert Langer | Director | $1,713,638 | Mixed | 07 Jul 2025 | ||
| David R. Horn | President & Cfo | $835,432 | -$55,153 | -6.2% | Filing P/S | 20 May 2026 |
| David Hallal | Director | $721,727 | Mixed | 12 Jun 2024 | ||
| Terrance McGuire | Director | $716,427 | Mixed | 09 Dec 2025 | ||
| Omead Ostadan | President & COO, Director | $641,151 | Mixed | 27 May 2022 | ||
| Mostafa Ronaghi | Director | $511,284 | Mixed | 14 Jun 2023 | ||
| Elona Kogan | Chief Legal Officer | $431,209 | Filing P/S | 06 Feb 2024 | ||
| Cathy Friedman | Director | $294,225 | Mixed | 14 Jun 2023 | ||
| Meeta Gulyani | Director | $229,066 | Mixed | 07 Jul 2025 | ||
| Rachel E. Haurwitz | Director | $178,060 | Mixed | 12 Jun 2024 | ||
| Scott D. Thomas | Chief Commercial Officer | $161,936 | Mixed | 18 May 2023 | ||
| Nicolas H. Roelofs PhD | Director | $159,741 | Mixed | 07 Jul 2025 | ||
| Dipchand Nishar | Director | $148,469 | -$62,935 | -30% | Mixed | 07 Jul 2025 |
| Anthony R. Bazarko | Chief Commercial Officer | $126,000 | Median | 08 May 2026 | ||
| Isaac Ro | Director | $86,920 | Mixed | 02 Sep 2025 | ||
| David B. Singer | Director | Mixed | 17 Jun 2021 | |||
| Maverick Capital Ventures, LLC | Director | Mixed | 17 Jun 2021 |
Recent insider transactions for Seer, Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| David R. Horn | SEER | Class A Common Stock | Sale | -1.46% | $12,352 | $1.69 | -7,303 | 493,959 | 20 May 2026 | Direct |
| Anthony R. Bazarko | SEER | Class A Common Stock | Award | 75,000 | 75,000 | 08 May 2026 | Direct | |||
| Anthony R. Bazarko | SEER | Employee Stock Option (right to buy) | Award | 225,000 | 225,000 | 08 May 2026 | Direct | |||
| David R. Horn | SEER | Class A Common Stock | Sale | -1.52% | $15,447 | $1.99 | -7,743 | 501,262 | 18 Feb 2026 | Direct |
| Omid Farokhzad | SEER | Class A Common Stock | Sale | -0.72% | $48,646 | $1.99 | -24,385 | 3,349,064 | 18 Feb 2026 | Direct |
| David R. Horn | SEER | Class A Common Stock | Award | 18.4% | 79,000 | 509,005 | 03 Feb 2026 | Direct | ||
| David R. Horn | SEER | Employee Stock Option (right to buy) | Award | 119,000 | 119,000 | 03 Feb 2026 | Direct | |||
| Omid Farokhzad | SEER | Class A Common Stock | Award | 26% | 697,162 | 3,373,449 | 03 Feb 2026 | Direct | ||
| Omid Farokhzad | SEER | Employee Stock Option (right to buy) | Award | 512,000 | 512,000 | 03 Feb 2026 | Direct | |||
| Terrance Mcguire | SEER | Class A Common Stock | Conversion of derivative security | 1.94% | 4,088 | 215,070 | 09 Dec 2025 | See footnote | ||
| Terrance Mcguire | SEER | Class B Common Stock | Conversion of derivative security | -100% | -4,088 | 0 | 09 Dec 2025 | See footnote | ||
| Omid Farokhzad | SEER | Class A Common Stock | Conversion of derivative security | 2,117,138 | 2,117,138 | 09 Dec 2025 | See footnote | |||
| Omid Farokhzad | SEER | Class A Common Stock | Conversion of derivative security | 116.1% | 1,438,057 | 2,676,287 | 09 Dec 2025 | Direct | ||
| Omid Farokhzad | SEER | Class B Common Stock | Conversion of derivative security | -100% | -2,117,138 | 0 | 09 Dec 2025 | See footnote | ||
| Omid Farokhzad | SEER | Class B Common Stock | Conversion of derivative security | -100% | -1,438,057 | 0 | 09 Dec 2025 | Direct | ||
| David R. Horn | SEER | Class A Common Stock | Sale | -1.53% | $13,400 | $1.97 | -6,797 | 436,802 | 19 Nov 2025 | Direct |
| Omid Farokhzad | SEER | Class A Common Stock | Sale | -2.66% | $66,708 | $1.97 | -33,838 | 1,238,230 | 19 Nov 2025 | Direct |
| Isaac Ro | SEER | Class A Common Stock | Award | 41,000 | 41,000 | 02 Sep 2025 | Direct | |||
| Isaac Ro | SEER | Stock Option (right to buy) | Award | 61,000 | 61,000 | 02 Sep 2025 | Direct | |||
| David R. Horn | SEER | Class A Common Stock | Sale | -1.54% | $13,955 | $2.04 | -6,827 | 436,802 | 20 Aug 2025 | Direct |
| Omid Farokhzad | SEER | Class A Common Stock | Sale | -2.6% | $69,483 | $2.04 | -33,992 | 1,272,068 | 20 Aug 2025 | Direct |
| Nicolas H. Roelofs PhD | SEER | Class A Common Stock | Award | 29.5% | 17,083 | 74,996 | 07 Jul 2025 | Direct | ||
| Nicolas H. Roelofs PhD | SEER | Stock Option (right to buy) | Award | 25,416 | 25,416 | 07 Jul 2025 | Direct | |||
| Dipchand Nishar | SEER | Class A Common Stock | Award | 41.7% | 20,500 | 69,704 | 07 Jul 2025 | Direct | ||
| Dipchand Nishar | SEER | Stock Option (right to buy) | Award | 30,500 | 30,500 | 07 Jul 2025 | Direct | |||
| Terrance Mcguire | SEER | Class A Common Stock | Award | 22.4% | 20,500 | 112,066 | 07 Jul 2025 | Direct | ||
| Terrance Mcguire | SEER | Stock Option (right to buy) | Award | 30,500 | 30,500 | 07 Jul 2025 | Direct | |||
| Robert Langer | SEER | Class A Common Stock | Award | 2.61% | 20,500 | 804,525 | 07 Jul 2025 | Direct | ||
| Robert Langer | SEER | Stock Option (right to buy) | Award | 30,500 | 30,500 | 07 Jul 2025 | Direct | |||
| Meeta Gulyani | SEER | Class A Common Stock | Award | 23.6% | 20,500 | 107,543 | 07 Jul 2025 | Direct | ||
| Meeta Gulyani | SEER | Stock Option (right to buy) | Award | 30,500 | 30,500 | 07 Jul 2025 | Direct | |||
| Dipchand Nishar | SEER | Class A Common Stock | Sale | -38.1% | $62,935 | $2.08 | -30,253 | 49,204 | 13 Jun 2025 | Direct |
* marks a reported price that did not pass the local price check.