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Built from publicly disclosed institutional and insider activity. Informational purposes only - not investment advice.OpenStocks · v0.1
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  1. Home/
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  3. Wellington Management
  • Overview
  • Portfolio1.9k
  • Performance40Q
  • Options38
  • Activity81k
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Asset Manager · CIK 0000902219

Wellington Management

Share
  • Mega-Fund

Wellington Management, an asset manager overseeing $570.60B in disclosed equity holdings (SEC CIK 0000902219). The latest portfolio (2025Q4) discloses 1874 positions across 11 sectors, with the largest positions in NVDA, MSFT and AAPL. On a mark-to-market basis the tracked portfolio has returned 132.7% since 2016Q1. OpenStocks tracks 40 consecutive quarterly snapshots for this manager — every position change, new entry, and exit is logged below.

Track Wellington's filingsView holdings↓
Portfolio
$570.60B
Positions
1874
Quarter
2025Q4
Filings tracked
40
Since filing+132.7%Full performance →
Quarter
2025Q42025Q32025Q22025Q12024Q42024Q32024Q22024Q12023Q42023Q32023Q22023Q1

Holdings

Sorted by value · 2023Q3
18 positions
1
G25508105CRH PLC
46.62%
of portfolio
Number of shares
7,524,281 sh
Holdings current value
$416.98M
Avg closing price
$55.75
Last action
Trimmed 24.3%
2025Q4
Current —
2
ARMARM HOLDINGS PLCADR
Technology·Semiconductors
17.09%
of portfolio
Number of shares
2,856,794 sh
Holdings current value
$152.90M
Avg closing price
$119.34
+39.7%
Last action
Added 28.5%
2025Q4
Current $166.73
3
FWONKLIBERTY MEDIA CORP DELTRK
Communication Services·Entertainment
14.13%
of portfolio
Number of shares
2,028,246 sh
Holdings current value
$126.36M
Avg closing price
$70.83
+27.7%
Last action
Trimmed 33.9%
2025Q4
Current $90.48
4
75525N107RAYZEBIO INC
9.45%
of portfolio
Number of shares
3,876,186 sh
Holdings current value
$84.49M
Avg closing price
$21.80
Last action
Exited
2023Q4
Current —
5
BATRKATLANTA BRAVES HLDGS INC
Communication Services·Entertainment
4.26%
of portfolio
Number of shares
1,065,803 sh
Holdings current value
$38.08M
Avg closing price
$38.50
+23.7%
Last action
Trimmed 36.2%
2025Q4
Current $47.63
6
APGEAPOGEE THERAPEUTICS INC
Healthcare·Biotechnology
3.69%
of portfolio
Number of shares
1,586,729 sh
Holdings current value
$33.04M
Avg closing price
$41.40
+122.7%
Last action
Added 1.5%
2025Q4
Current $92.20
7
CARTMAPLEBEAR INC
Consumer Cyclical·Internet Retail
1.00%
of portfolio
Number of shares
300,519 sh
Holdings current value
$8.92M
Avg closing price
$41.46
-0.2%
Last action
Added 47.6%
2025Q4
Current $41.39
8
ALNY 1 09/15/27ALNYLAM PHARMACEUTICALS INC
0.85%
of portfolio
Number of shares
8,267,000 sh
Holdings current value
$7.63M
Avg closing price
$0.98
Last action
Exited
2025Q4
Current —
9
NCMINATIONAL CINEMEDIA INC
Communication Services·Advertising Agencies
0.58%
of portfolio
Number of shares
1,149,334 sh
Holdings current value
$5.16M
Avg closing price
$4.79
-24.2%
Last action
Trimmed 40.5%
2025Q4
Current $3.63
10
KVYOKLAVIYO INC
Technology·Software - Application
0.56%
of portfolio
Number of shares
146,300 sh
Holdings current value
$5.05M
Avg closing price
$34.50
-45.9%
Last action
Exited
2023Q4
Current $18.67
11
SYREAEGLEA BIOTHERAPEUTICS INC
Healthcare·Biotechnology
0.41%
of portfolio
Number of shares
299,929 sh
Holdings current value
$3.67M
Avg closing price
$27.33
+167.2%
Last action
Trimmed 23.3%
2025Q4
Current $73.01
12
POST 2.5 08/15/27POST HLDGS INC
0.33%
of portfolio
Number of shares
2,927,000 sh
Holdings current value
$2.95M
Avg closing price
$1.06
Last action
Trimmed 18.2%
2025Q4
Current —
13
LLYVK*LIBERTY MEDIA CORP DELTRK
0.30%
of portfolio
Number of shares
84,111 sh
Holdings current value
$2.70M
Avg closing price
$32.10
Last action
Exited
2023Q4
Current —
14
RCL 6 08/15/25ROYAL CARIBBEAN GROUP
0.27%
of portfolio
Number of shares
1,199,000 sh
Holdings current value
$2.37M
Avg closing price
$2.03
Last action
Exited
2024Q4
Current —
15
CYTK 3.5 07/01/27CYTOKINETICS INC
0.21%
of portfolio
Number of shares
2,165,000 sh
Holdings current value
$1.86M
Avg closing price
$1.09
Last action
Trimmed 82.3%
2025Q4
Current —
16
ZTO 1.5 09/01/27ZTO EXPRESS CAYMAN INC
0.16%
of portfolio
Number of shares
1,515,000 sh
Holdings current value
$1.47M
Avg closing price
$0.99
Last action
Exited
2025Q3
Current —
17
RBT*RUBICON TECHNOLOGIES INC
0.07%
of portfolio
Number of shares
294,338 sh
Holdings current value
$612.2K
Avg closing price
$2.08
Last action
Exited
2024Q2
Current —
18
HIVEHIVE DIGITAL TECHNOLOGIES LT
Financial Services·Capital Markets
0.02%
of portfolio
Number of shares
62,704 sh
Holdings current value
$194.3K
Avg closing price
$3.10
-19.0%
Last action
Exited
2025Q2
Current $2.51

Portfolio heatmap

Box size = % of portfolio · color = return since filing
CRH PLC
46.62%
ARM
17.09% · +211.5%
FWONK
14.13% · +45.2%
RAYZEBIO INC
9.45%
BATRK
4.26% · +33.3%
APGE
3.69% · +342.8%
CART
1.00% · +39.4%
ALNY 1 09/15/27
0.85%
NCMI
0.58% · -19.2%
KVYO
0.56% · -45.9%
SYRE
0.41% · +496.0%
POST 2.5 08/15/27
0.33%
LLYVK*
0.30%
RCL 6 08/15/25
0.27%
CYTK 3.5 07/01/27
0.21%
ZTO 1.5 09/01/27
0.16%
RBT*
0.07%
HIVE
0.02% · -19.0%

Sector exposure

Share of dollar value across the latest reported portfolio. Unclassified positions excluded.
  • Communication Services3 pos$169.6M45.4%
  • Technology2 pos$157.9M42.3%
  • Healthcare2 pos$36.7M9.8%
  • Consumer Cyclical1 pos$8.9M2.4%
  • Financial Services1 pos$194K0.1%
(58.3% unclassified, excluded from %)