Quick Takeaways
- SEER - Seer, Inc. has 18 insiders with reported activity on this page.
- Net insider value flow over the last year: -$374,455.
- Recent transaction rows are available for direct filing-level review.
- Info
- Insider Trading
- Financials
- Holders
Insider Transactions Reported by 18 Insiders of Seer, Inc.
- Symbol
- SEER on Nasdaq
- Location
- Redwood City, CA
What Changed
- Buy value: ; sell value: $374,455.
- Net share flow: -184,258.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Source Evidence
Filed on Form 4
See Original Filing
Issuer insider activity is sourced from SEC Forms 3, 4, and 5.
Insider trading overview
Last 12 monthsNet insider flow leans to selling over the last 12 months. Net value: -$374,455.
Buys
$0
Shares: 0
Insiders: 0
Sells
$374,455
Shares: 184,258
Insiders: 3
Net
-$374,455
Shares: -184,258
Insiders: -3
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 32,128 | $0 | $64,092 | -$64,092 |
| 3-6 | 0 | 40,635 | $0 | $80,108 | -$80,108 |
| 6-9 | 0 | 40,819 | $0 | $83,438 | -$83,438 |
| 9-12 | 0 | 70,676 | $0 | $146,817 | -$146,817 |
Seer, Inc. executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Omid Farokhzad | CEO AND CHAIR, Director | $10,682,437 | -$254,691 | -2.3% | 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 | $999,967 | -$56,829 | -5.4% | Filing P/S | 18 Feb 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 |
| 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 |
Top shareholders of Seer, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| Omid Farokhzad |
3/4/5
13D/G
|
CEO AND CHAIR, Director |
7.8%
from 13D/G
|
5,978,202
mixed-class rows
|
$10,682,437 | -$254,691 | 18 Feb 2026 | |
| SOFTBANK GROUP CORP. |
13F
|
Company |
9.1%
|
5,135,383
|
$9,397,751 | — | 31 Dec 2025 | |
| aMoon Growth Fund Limited Partnership |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
4,923,196
|
$8,345,310 | — | 09 Jun 2021 | |
| Schindel Yair Chaim |
13D/G
|
— |
8.4%
|
4,923,196
|
$8,320,201 | $0 | 31 Dec 2024 | |
| Siren, L.L.C. |
13F
|
Individual |
7%
|
4,000,000
|
$7,320,000 | — | 31 Dec 2025 | |
| Bradley L. Radoff |
13D/G
|
Radoff Bradley Louis |
4.6%
|
2,610,232
|
$4,489,599 | $0 | 12 Apr 2026 | |
| VANGUARD GROUP INC |
13F
|
Company |
3.9%
|
2,187,413
|
$4,002,966 | — | 31 Dec 2025 | |
| ACADIAN ASSET MANAGEMENT LLC |
13F
|
Company |
3.6%
|
2,041,198
|
$3,732,000 | — | 31 Dec 2025 | |
| BlackRock, Inc. |
13F
|
Company |
3.2%
|
1,827,134
|
$3,343,657 | — | 31 Dec 2025 | |
| RENAISSANCE TECHNOLOGIES LLC |
13F
|
Company |
1.9%
|
1,051,400
|
$1,924,062 | — | 31 Dec 2025 | |
| Robert Langer |
3/4/5
|
Director |
—
mixed-class rows
|
835,025
mixed-class rows
|
$1,713,638 | — | 07 Jul 2025 | |
| NANO CAP NEW MILLENNIUM GROWTH FUND L P |
13F
|
Company |
1.5%
|
825,000
|
$1,509,750 | — | 31 Dec 2025 | |
| AJU IB Investment Co., Ltd. |
13F
|
Company |
1.4%
|
816,375
|
$1,493,966 | — | 31 Dec 2025 | |
| FMR LLC |
13F
|
Company |
1.2%
|
703,886
|
$1,288,112 | — | 31 Dec 2025 | |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC |
13F
|
Company |
1.1%
|
609,443
|
$1,115,281 | — | 31 Dec 2025 | |
| David R. Horn |
3/4/5
|
PRESIDENT & CFO |
—
mixed-class rows
|
620,262
mixed-class rows
|
$999,967 | -$56,829 | 18 Feb 2026 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
0.83%
|
473,040
|
$865,859 | — | 31 Dec 2025 | |
| TWO SIGMA ADVISERS, LP |
13F
|
Company |
0.81%
|
462,100
|
$845,643 | — | 31 Dec 2025 | |
| Peapod Lane Capital LLC |
13F
|
Company |
0.77%
|
438,612
|
$802,660 | — | 31 Dec 2025 | |
| D. E. Shaw & Co., Inc. |
13F
|
Company |
0.72%
|
408,557
|
$747,659 | — | 31 Dec 2025 | |
| David Hallal |
3/4/5
|
Director |
—
mixed-class rows
|
389,863
mixed-class rows
|
$721,727 | — | 12 Jun 2024 | |
| Terrance McGuire |
3/4/5
|
Director |
—
mixed-class rows
|
357,636
mixed-class rows
|
$716,427 | — | 09 Dec 2025 | |
| 1888 Investments, LLC |
13F
|
Company |
0.63%
|
359,143
|
$657,232 | — | 31 Dec 2025 | |
| Omead Ostadan |
3/4/5
|
President & COO, Director |
—
class O/S missing
|
378,238
|
$641,151 | — | 27 May 2022 | |
| Mostafa Ronaghi |
3/4/5
|
Director |
—
mixed-class rows
|
336,360
mixed-class rows
|
$511,284 | — | 14 Jun 2023 | |
| GSA CAPITAL PARTNERS LLP |
13F
|
Company |
0.46%
|
261,364
|
$478,000 | — | 31 Dec 2025 | |
| TWO SIGMA INVESTMENTS, LP |
13F
|
Company |
0.45%
|
252,647
|
$462,344 | — | 31 Dec 2025 | |
| Elona Kogan |
3/4/5
|
CHIEF LEGAL OFFICER |
—
mixed-class rows
|
413,142
mixed-class rows
|
$431,209 | — | 06 Feb 2024 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
0.41%
|
235,485
|
$430,831 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.37%
|
211,053
|
$386,227 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
0.3%
|
171,368
|
$313,603 | — | 31 Dec 2025 | |
| Cathy Friedman |
3/4/5
|
Director |
—
mixed-class rows
|
208,309
mixed-class rows
|
$294,225 | — | 14 Jun 2023 | |
| STATE STREET CORP |
13F
|
Company |
0.27%
|
152,082
|
$278,310 | — | 31 Dec 2025 | |
| Shay Capital LLC |
13F
|
Company |
0.26%
|
150,331
|
$275,106 | — | 31 Dec 2025 | |
| T3 Companies, LLC |
13F
|
Company |
0.23%
|
132,000
|
$241,560 | — | 31 Dec 2025 | |
| Meeta Gulyani |
3/4/5
|
Director |
—
mixed-class rows
|
138,043
mixed-class rows
|
$229,066 | — | 07 Jul 2025 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
0.21%
|
116,497
|
$213,190 | — | 31 Dec 2025 | |
| HSBC HOLDINGS PLC |
13F
|
Company |
0.2%
|
114,348
|
$210,401 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.19%
|
108,082
|
$197,790 | — | 31 Dec 2025 | |
| EDGEWOOD MANAGEMENT LLC |
13F
|
Company |
0.18%
|
100,000
|
$183,000 | — | 31 Dec 2025 | |
| Rachel E. Haurwitz |
3/4/5
|
Director |
—
mixed-class rows
|
122,350
mixed-class rows
|
$178,060 | — | 12 Jun 2024 | |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP |
13F
|
Company |
0.17%
|
93,876
|
$171,793 | — | 31 Dec 2025 | |
| Scott D. Thomas |
3/4/5
|
Chief Commercial Officer |
—
class O/S missing
|
95,532
|
$161,936 | — | 18 May 2023 | |
| Nicolas H. Roelofs PhD |
3/4/5
|
Director |
—
mixed-class rows
|
100,412
mixed-class rows
|
$159,741 | — | 07 Jul 2025 | |
| Dipchand Nishar |
3/4/5
|
Director |
—
mixed-class rows
|
100,204
mixed-class rows
|
$148,469 | -$62,935 | 07 Jul 2025 | |
| AMERICAN CENTURY COMPANIES INC |
13F
|
Company |
0.13%
|
75,169
|
$137,559 | — | 31 Dec 2025 | |
| ROYAL BANK OF CANADA |
13F
|
Company |
0.13%
|
71,500
|
$131,000 | — | 31 Dec 2025 | |
| Palumbo Wealth Management LLC |
13F
|
Company |
0.12%
|
67,647
|
$123,795 | — | 31 Dec 2025 | |
| Corient Private Wealth LLC |
13F
|
Company |
0.11%
|
63,200
|
$115,656 | — | 31 Dec 2025 | |
| Squarepoint Ops LLC |
13F
|
Company |
0.11%
|
60,884
|
$111,418 | — | 31 Dec 2025 |
Recent Insider Transactions by Companies or Individuals for Seer, Inc.
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| David R. Horn | SEER | Class A Common Stock | Sale | -1.5% | $14,028 | $2.08 | -6,760 | 443,629 | 20 May 2025 | Direct |
| Omid Farokhzad | SEER | Class A Common Stock | Sale | -2.51% | $69,854 | $2.08 | -33,663 | 1,306,060 | 20 May 2025 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.