Seer SEER Insider Ownership

NASDAQ SEER
$2.15 +0.12 (+5.91%)
At close: Sep 29, 2026 · 4:00 PM EDT

Insider Holdings by Owner

6.79Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
16.54%
▲+0.139% pp QoQ
Shares Held by Insiders
9.13Mn
filed for Sep 2026
▲+0.85% QoQ
Shares Outstanding
55.16Mn
55,164,080 shares
Direct Holdings
6.79Mn
Indirect: 2.33Mn
Net Shares Traded (QoQ)
+76.91K
net buying in Sep 2026
Insiders Holding Shares
16
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest —
Average ownership —
Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter —
Net over range —
Buying quarters —

Insider Ownership Summary

Quarter ending 30 Sep, 2026

SEER's three largest insider shareholders as of September 29, 2026 are Omid Farokhzad (Ceo And Chair, 3.35Mn shares), Omid Farokhzad (Ceo And Chair, 2.12Mn shares), Robert Langer (Director, 821.02K shares).

Form 4 Holdings

Insiders Holding SEER

Insiders 16
Shares held 6.79Mn
Of outstanding 12.31%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Omid Farokhzad Ceo And Chair 3,349,064 0 3,349,064 49.3% 19 Feb, 2026
2 Robert Langer Director 821,025 0 821,025 12.1% 30 Jul, 2026
3 David R. Horn President Cfo 486,650 0 486,650 7.2% 19 Aug, 2026
4 Omead Ostadan President Coo 378,238 0 378,238 5.6% 01 Jun, 2022
5 David Hallal Director 355,128 0 355,128 5.2% 14 Jun, 2024
6 Elona Kogan Chief Legal Officer 273,142 0 273,142 4.0% 23 Feb, 2024
7 Mostafa Ronaghi Director 224,903 0 224,903 3.3% 16 Jun, 2023
8 Cathy Friedman Director 173,574 0 173,574 2.6% 16 Jun, 2023
9 Terrance Mcguire Director 128,566 0 128,566 1.9% 30 Jul, 2026
10 Meeta Gulyani Director 124,043 0 124,043 1.8% 30 Jul, 2026
11 Scott D Thomas Chief Commercial Officer 95,532 0 95,532 1.4% 19 May, 2023
12 Nicolas H Phd Roelofs Director 91,496 0 91,496 1.3% 30 Jul, 2026
13 Rachel E. Haurwitz Director 87,615 0 87,615 1.3% 14 Jun, 2024
14 Dipchand Nishar Director 75,544 0 75,544 1.1% 30 Jul, 2026
15 Anthony R. Bazarko Chief Commercial Officer 75,000 0 75,000 1.1% 11 May, 2026
16 Isaac Ro Director 53,375 0 53,375 0.8% 30 Jul, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

329 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
18 Aug, 2026 David R. Horn President Cfo Disposed S 7,309 $2.03 $14.81K 486,650 Direct
28 Jul, 2026 Terrance Mcguire Director Acquired A 16,500 $0.00 $0 128,566 Direct
28 Jul, 2026 Meeta Gulyani Director Acquired A 16,500 $0.00 $0 124,043 Direct
28 Jul, 2026 Dipchand Nishar Director Acquired A 16,500 $0.00 $0 75,544 Direct
28 Jul, 2026 Robert Langer Director Acquired A 16,500 $0.00 $0 821,025 Direct
28 Jul, 2026 Nicolas H Phd Roelofs Director Acquired A 16,500 $0.00 $0 91,496 Direct
28 Jul, 2026 Isaac Ro Director Acquired A 12,375 $0.00 $0 53,375 Direct
28 Jul, 2026 Robert Langer Director Acquired A 25,000 $0.00 $0 25,000 Direct
28 Jul, 2026 Meeta Gulyani Director Acquired A 25,000 $0.00 $0 25,000 Direct
28 Jul, 2026 Isaac Ro Director Acquired A 18,750 $0.00 $0 18,750 Direct
28 Jul, 2026 Dipchand Nishar Director Acquired A 25,000 $0.00 $0 25,000 Direct
28 Jul, 2026 Nicolas H Phd Roelofs Director Acquired A 25,000 $0.00 $0 25,000 Direct
28 Jul, 2026 Terrance Mcguire Director Acquired A 25,000 $0.00 $0 25,000 Direct
08 Jul, 2026 Dipchand Nishar Director Disposed S 10,660 $2.18 $23.27K 59,044 Direct
20 May, 2026 David R. Horn President Cfo Disposed S 7,303 $1.69 $12.35K 493,959 Direct
08 May, 2026 Anthony R. Bazarko Chief Commercial Officer Acquired A 75,000 — — 75,000 Direct
08 May, 2026 Anthony R. Bazarko Chief Commercial Officer Acquired A 225,000 $0.00 $0 225,000 Direct
18 Feb, 2026 David R. Horn President Cfo Disposed S 7,743 $1.99 $15.45K 501,262 Direct
18 Feb, 2026 Omid Farokhzad Ceo And Chair Disposed S 24,385 $1.99 $48.65K 3,349,064 Direct
03 Feb, 2026 Omid Farokhzad Ceo And Chair Acquired A 697,162 $0.00 $0 3,373,449 Direct