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Loomis Sayles & Co. L P

CIK:0000312348
Asset Manager
$389B AUM
715 holdings
Boston, MA, United States
Founded:1926
800 employees
Latest filing:Jun 30, 2025

Loomis, Sayles & Company L.P. is a global asset manager based in Boston, Massachusetts. Founded in 1926 by Robert H. Loomis and Ralph T. Sayles, it specializes in investment management and advisory services for institutional and retail clients across 20 countries. The firm is a subsidiary of Natixis Investment Managers and provides tailored investment solutions across equity, fixed income, and alternative strategies. As of December 31, 2024, Loomis Sayles managed approximately $389.3 billion in assets, employing hundreds of investment professionals dedicated to proprietary research and client-focused solutions. The firm services institutional investors, financial intermediaries, and other large clients.

Investment Strategy

Loomis Sayles employs a multi-style, research-intensive investment approach. Its teams are empowered to independently pursue alpha opportunities using bottom-up, quantitative, and macro strategies, all supported by rigorous proprietary research and integrated risk analysis. The firm emphasizes disciplined investment processes, prudent risk-taking where it believes it has an informational or analytical edge, and broad collaboration to deliver long-term capital appreciation. Strategies span active equity, global fixed income, multi-asset, and alternatives, with customized solutions based on client objectives and needs.

Top Buys
N
NVDANVIDIA CORP
+$2.03B
N
NFLXNETFLIX.COM INC
+$1.43B
O
ORCLORACLE CORP
+$1.30B
M
METAMETA PLATFORMS INC
+$1.14B
M
MSFTMICROSOFT CORP
+$749.2M
Top Sells
B
BABAALIBABA GROUP HOLDING-SP ADR
-$230.9M
V
VRTXVERTEX PHARMACEUTICALS INC
-$119.6M
T
TMOTHERMO FISHER SCIENTIFIC INC
-$96.8M
Y
YUMCYUM CHINA HOLDINGS INC
-$77.5M
U
UNHUNITEDHEALTH GROUP
-$70.8M

Top Holdings

N
NVDANVIDIA CORP
+8.3%$6.63B
M
METAMETA PLATFORMS INC
+7.0%$5.56B
N
NFLXNETFLIX.COM INC
+6.3%$5.00B
A
AMZNAMAZON.COM INC
+5.3%$4.23B
T
TSLATESLA INC
+5.1%$4.10B

Equity Positions (657)

TickerSecurityWeightMarket ValueSharesAvg CostPriceChange (QoQ)
N
NVDA
NVIDIA CORP8.31%$6.63B41,960,289$5.03$157.99+$2.03B
M
META
META PLATFORMS INC6.97%$5.56B7,530,322$102.81$738.09+$1.14B
N
NFLX
NETFLIX.COM INC6.27%$5.00B3,735,018$286.59$1339.13+$1.43B
A
AMZN
AMAZON.COM INC5.30%$4.23B19,261,090$37.36$219.39+$503.2M
T
TSLA
TESLA INC5.14%$4.10B12,914,797$227.15$317.66+$699.1M

Industry Allocation

SERVICES-PREPACKAGED SOFTWARE
+16.7%
SERVICES-COMPUTER PROGRAMMING, DATA PROCESSING, ETC.
+13.2%
SEMICONDUCTORS & RELATED DEVICES
+9.1%
PHARMACEUTICAL PREPARATIONS
+6.4%
SERVICES-VIDEO TAPE RENTAL
+6.3%