Stocks/Funds/CIK 312348

LOOMIS SAYLES & CO L P

index-like (500+ pos)long-term holder
Quarterly 13F filings · Latest period 2026-03-31 · CIK 312348
Assets
$73.82B
+7.5% YoY
Holdings
672
Lifetime alpha vs market
-0.97% annual
Average hold time
5.1 yr
median 4.8 yr

Quarterly history

Cum return +120% vs S&P +136% · α -17% lifetimeAUM $73.8B · peak $83.7BFlow $-431M (-1%)2016-062017-122019-062020-122022-062023-122025-062026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
-6.43%
trims when stocks drop
when a holding falls −10%+
Middle response
-3.74%
baseline attrition
Rally response
-3.34%
trims into rallies
when a holding rises +10%+

Top positions · 30

Ticker$ value% portYoYHold time
NVDANVIDIA Corporation$7.15B9.7%+60.9%8.8 yr
GOOGLAlphabet Inc.$4.99B6.8%10.5 yr
TSLATesla, Inc.$4.70B6.4%+43.4%6.5 yr
METAMeta Platforms, Inc.$4.26B5.8%-0.4%10.5 yr
AMZNAmazon.com, Inc.$3.82B5.2%+9.5%10.5 yr
NFLXNetflix, Inc.$3.65B4.9%+3.1%5.8 yr
BAThe Boeing Company$2.80B3.8%+16.7%10.5 yr
VVisa Inc.$2.80B3.8%-13.1%10.5 yr
ORCLOracle Corporation$2.48B3.4%+5.9%10.5 yr
MSFTMicrosoft Corporation$2.24B3.0%-0.6%10.5 yr
MNSTMonster Beverage Corpora$1.88B2.5%+23.8%10.5 yr
VRTXVertex Pharmaceuticals I$1.79B2.4%-7.9%6.5 yr
SHOPShopify Inc.$1.71B2.3%+24.2%4.8 yr
REGNRegeneron Pharmaceutical$1.48B2.0%+22.5%9.8 yr
ADSKAutodesk, Inc.$1.37B1.9%-8.6%10.5 yr

Portfolio composition (YoY)

Industry mix
Internet Content & Information13.7%+2.2pp$10.11B
Semiconductors11.7%+3.2pp$8.64B
Software - Infrastructure7.1%-0.7pp$5.24B
Software - Application6.9%-1.9pp$5.09B
Entertainment6.8%-0.5pp$5.00B
Auto - Manufacturers6.4%+1.5pp$4.74B
Biotechnology6.4%-0.2pp$4.74B
Specialty Retail5.8%-1.1pp$4.30B
Financial - Credit Services4.7%-1.2pp$3.46B
Aerospace & Defense4.5%+0.3pp$3.33B
Country
US92.7%+0.8pp
CA2.5%+0.4pp
CH1.2%+0.3pp
DK0.8%-0.4pp
Unknown0.5%-0.1pp
GB0.5%-0.2pp
IE0.4%+0.1pp
CN0.4%-0.8pp
Top 5: 33.8% · Top 10: 52.7% · Top 25: 75.6%

Winners

TickerPrev $PnLYoY %
NVDA$4.60B+2.80B60.9%
TSLA$3.40B+1.48B43.4%
GOOG$556M+0.47B84.3%
BA$2.48B+0.41B16.7%
MNST$1.53B+0.36B23.8%

Losers

TickerPrev $PnLYoY %
CRM$1.68B-0.50B-30.2%
V$3.23B-0.42B-13.1%
NVO$860M-0.40B-46.7%
VRTX$1.82B-0.14B-7.9%
ADSK$1.50B-0.13B-8.6%

Top buys this quarter · 15

NVDA NVIDIA Corporation+$7.15B
ORCL Oracle Corporation+$2.48B
AMZN Amazon.com, Inc.+$3.82B
EXPE Expedia Group, Inc.+$73M
NFLX Netflix, Inc.+$71M
TYL Tyler Technologies, Inc.+$55M
PIPR Piper Sandler Companiesnew+$41M
ADEA Adeia Inc.new+$32M
PGR The Progressive Corporation+$31M
ALGM Allegro MicroSystems, Inc.+$27M

Top sells this quarter · 15

ILMN Illumina, Inc.$151M
PH Parker-Hannifin Corporation$130M
MEDP Medpace Holdings, Inc.$97M
CMI Cummins Inc.$90M
MTD Mettler-Toledo International I$77M
HD The Home Depot, Inc.$70M
LIN Linde plc$67M
BLK BlackRock, Inc.$62M
SIMO Silicon Motion Technology Corp$55M
HLT Hilton Worldwide Holdings Inc.$54M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$73.82B672+11.72%+17.59%-5.87%-0.43B
2025-12-31$82.38B639+13.23%+17.72%-4.49%-1.45B
2025-09-30$83.68B658+20.45%+17.52%+2.93%-1.14B
2025-06-30$79.36B662+19.70%+14.94%+4.76%-0.14B
2025-03-31$68.68B672+3.92%+8.30%-4.38%-2.95B
2024-12-31$78.40B651+23.34%+24.89%-1.55%-1.49B
2024-09-30$74.97B636+31.18%+36.04%-4.86%-1.07B
2024-06-30$71.59B636+18.93%+24.49%-5.56%+1.87B
2024-03-31$69.37B628+29.29%+29.62%-0.33%-0.17B
2023-12-31$64.14B907+37.76%+26.18%+11.59%-0.97B
2023-09-30$57.44B848+29.30%+21.57%+7.74%-1.39B
2023-06-30$61.09B918+29.74%+19.42%+10.32%-0.90B
2023-03-31$56.74B923-2.45%-7.82%+5.36%-0.28B
2022-12-31$49.36B817+6.38%+7.56%-1.18%-2.57B
2022-09-30$48.81B915-3.37%-4.93%+1.56%-2.59B
2022-06-30$53.19B934-17.85%-16.11%-1.74%-7.22B