DOSSIER · 13F Holders · Q1 2026Healthcare · Services-Medical Laboratories
NTRA

NATERA INC

826 institutions still hold NATERA INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 632307104·Services-Medical Laboratories·826 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$17.0B
visible holders
Holders
826
filers reporting
Concentration
14.73%
JPMORGAN CHASE & CO #1
top holder share
AI Holders Summary · Q1 2026

Zevenbergen Capital Investments, Natera's largest tracked holder, cut its share count by 2.65% this quarter — a genuine $1.9 million outflow. Its position's reported value climbed $16.8 million anyway, entirely on the stock's price rise. That contradiction sits beside a far larger real move: Assenagon Asset Management, flagged quasi-passive, more than quadrupled its stake, from 60,535 to 250,869 shares, a genuine $51.7 million purchase that now makes it nearly Natera's largest holder. E. Ohman J:or Asset Management made the largest real sale, cutting 88.2% ($6.6 million outflow), while Cary Street Partners Financial grew its small stake more than sevenfold (+655.5%, a real $1.3 million buy).

A far bigger real move sits right behind it

Assenagon Asset Management's stake tells a much larger story: shares grew from 60,535 to 250,869 — more than quadrupling, a genuine $51.7 million purchase that now makes it nearly Natera's largest holder, trailing Zevenbergen by less than $1 million in total value. Assenagon carries a quasi-passive classification in this dataset, so a move this size more likely reflects an index or mandate shift than a discretionary bullish call, but its scale still dominates the quarter's real activity.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
JPMORGAN CHASE & CO
CIK 0000019617
$2.5B13.4M0.16%Q1 2026
02
PRICE T ROWE ASSOCIATES INC /MD/
CIK 0000080255
$2.4B12.2M0.28%Q1 2026
03
BlackRock, Inc.
CIK 0002012383
$2.1B10.7M0.04%Q1 2026
04
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$1.2B6.0M0.03%Q1 2026
05
Vanguard Portfolio Management
CIK 0002100121· Index
$1.1B5.6M0.06%Q1 2026
06
WELLINGTON MANAGEMENT GROUP LLP
CIK 0000902219
$954M4.8M0.18%Q1 2026
07
STATE STREET CORP
CIK 0000093751
$683M3.4M0.02%Q1 2026
08
FARALLON CAPITAL MANAGEMENT LLC
CIK 0000909661
$641M3.2M3.66%Q1 2026
09
Duquesne Family Office LLC
CIK 0001536411
$613M3.1M18.14%Q1 2026
10
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$554M2.8M0.03%Q1 2026
11
FMR LLC
CIK 0000315066
$511M2.6M0.03%Q1 2026
12
COATUE MANAGEMENT LLC
CIK 0001135730
$508M2.5M1.75%Q1 2026
13
Castle Hook Partners LP
CIK 0001687241
$506M2.5M2.16%Q1 2026
14
FRANKLIN RESOURCES INC
CIK 0000038777
$497M2.5M0.12%Q1 2026
15
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
$443M2.3M0.20%Q1 2026
16
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
CIK 0000912938
$408M2.0M0.14%Q1 2026
17
FRED ALGER MANAGEMENT, LLC
CIK 0000003520
$351M1.8M1.54%Q1 2026
18
Sofinnova Investments, Inc.
CIK 0001631134
$310M1.6M11.78%Q1 2026
19
NWI MANAGEMENT LP
CIK 0001103887
$305M1.5M8.67%Q1 2026
20
Capital World Investors
CIK 0001422849
$294M1.5M0.04%Q1 2026
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Insiders at NATERA INC
Brophy Michael BurkesChapman Rowan ESheena JonathanRabinowitz MatthewRabinowitz DanielMoshkevich SolomonBertagnolli MonicaBaynes Roy D.