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LOOMIS SAYLES & CO L P — 13F Holdings & Portfolio

CIK 312348 · latest 13F-HR filed 2026-08-14

Backtest portfolio

LOOMIS SAYLES & CO L P manages $79.79B in 13F-reported U.S. long-equity assets across 1,159 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are NVDA (8.65%), GOOGL (6.75%), TSLA (5.84%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 82 new positions, exited 93, added to 385, and trimmed 160.

AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.

Filer Information
Address
ONE FINANCIAL CTR
LEGAL & COMPLIANCE, 5TH FLOOR
BOSTON, MA 02111
Phone
(617) 748-1761
Filing Manager
LOOMIS SAYLES & CO L P
BOSTON, MA
Signatory
Mari Shimokawa
Deputy CCO
Loading holdings…
AUM

$79.79B

Long-equity book

Holdings

1,159

Distinct positions

Period

2026-06-30

Filed 2026-08-14

Q/Q Activity

+82 / −93 / ↑385 / ↓160

vs 2026-03-31

Firm Profile & Key People
Name Title / Status Ownership Type

Top Adds (vs prior quarter)

  • ALPHABET INC-CL A$1.17B +23.4%
  • NVIDIA CORP$757.5M +10.6%
  • MICROSOFT CORP$657.5M +29.3%
  • TESLA INC$628.5M +13.4%
  • AMAZON.COM INC$542.9M +14.2%
Show all 385 →

Top Trims

  • NETFLIX.COM INC-$793.9M -21.7%
  • QUALCOMM INC-$506.9M -93.7%
  • REGENERON PHARMACEUTICALS-$318.3M -21.5%
  • PAYPAL HOLDINGS INC-$275.3M -96.2%
  • AUTODESK INC-$142.5M -10.4%
Show all 160 →

New Positions

  • ALPHABET INC CVTPFD 6.25$72.8M
  • ALPHABET INC CVTPFD 6.25$63.6M
  • SEMTECH CORP$50.6M
  • RYAN SPECIALTY GROUP HLDGS-A$36.2M
  • A10 NETWORKS INC$33.0M
Show all 82 →

Exited Positions

  • SILICON LABS INC$46.5M
  • CRISPR THERAPEUTICS AG$46.1M
  • ARTIVION INC$35.9M
  • INSMED INC$31.9M
  • EVERTEC INC$28.9M
Show all 93 →
All Holdings

Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).

# Issuer Symbol CUSIP Value Weight Shares Type
1 NVIDIA CORP NVDA 67066G104 $6.90B 8.65% 34,474,239 SH
2 ALPHABET INC-CL A GOOGL 02079K305 $5.39B 6.75% 15,069,743 SH
3 TESLA INC TSLA 88160R101 $4.66B 5.84% 11,069,180 SH
4 AMAZON.COM INC AMZN 023135106 $3.85B 4.82% 16,148,220 SH
5 META PLATFORMS INC META 30303M102 $3.71B 4.65% 6,585,873 SH
6 VISA INC-CLASS A SHRS V 92826C839 $2.73B 3.43% 7,969,758 SH
7 BOEING CO BA 097023105 $2.63B 3.29% 12,133,478 SH
8 MICROSOFT CORP MSFT 594918104 $2.54B 3.18% 6,807,531 SH
9 NETFLIX.COM INC NFLX 64110L106 $2.52B 3.15% 35,241,142 SH
10 ORACLE CORP ORCL 68389X105 $2.15B 2.69% 14,656,978 SH
11 MONSTER BEVERAGE CORPORATION MNST 61174X109 $2.09B 2.62% 21,779,296 SH
12 VERTEX PHARMACEUTICALS INC VRTX 92532F100 $1.70B 2.14% 3,429,775 SH
13 SHOPIFY INC - CLASS A SHOP 82509L107 $1.45B 1.82% 12,711,965 SH
14 THE WALT DISNEY CO DIS 254687106 $1.14B 1.43% 11,859,763 SH
15 AUTODESK INC ADSK 052769106 $1.08B 1.36% 5,565,434 SH
16 REGENERON PHARMACEUTICALS REGN 75886F107 $1.01B 1.27% 1,627,003 SH
17 NVIDIA CORP NVDA 67066G104 $1.01B 1.26% 5,027,672 SH
18 SALESFORCE.COM INC CRM 79466L302 $891.2M 1.12% 5,689,046 SH
19 ALPHABET INC-CL C GOOG 02079K107 $873.5M 1.09% 2,472,158 SH
20 STARBUCKS CORP SBUX 855244109 $816.8M 1.02% 7,992,972 SH
21 EXPEDITORS INTL WASH INC EXPD 302130109 $785.3M 0.98% 4,818,223 SH
22 NOVO-NORDISK A/S SPONS ADR NVO 670100205 $772.7M 0.97% 16,118,534 SH
23 ALPHABET INC-CL A GOOGL 02079K305 $767.7M 0.96% 2,148,111 SH
24 DEERE & CO DE 244199105 $763.5M 0.96% 1,203,693 SH
25 NOVARTIS AG SPON ADR NVS 66987V109 $715.5M 0.90% 4,565,555 SH
26 TESLA INC TSLA 88160R101 $677.3M 0.85% 1,610,298 SH
27 SEI INVESTMENTS CO SEIC 784117103 $654.2M 0.82% 7,458,220 SH
28 BOOKING HOLDINGS INC BKNG 09857L108 $606.8M 0.76% 3,404,199 SH
29 INTUITIVE SURGICAL INC ISRG 46120E602 $576.8M 0.72% 1,450,347 SH
30 THERMO FISHER SCIENTIFIC INC TMO 883556102 $571.0M 0.72% 1,138,905 SH
31 META PLATFORMS INC META 30303M102 $517.4M 0.65% 918,550 SH
32 YUM! BRANDS INC YUM 988498101 $512.1M 0.64% 3,203,404 SH
33 AMAZON.COM INC AMZN 023135106 $510.8M 0.64% 2,143,183 SH
34 BLOCK INC XYZ 852234103 $491.8M 0.62% 6,471,275 SH
35 VISA INC-CLASS A SHRS V 92826C839 $391.5M 0.49% 1,141,015 SH
36 BOEING CO BA 097023105 $385.7M 0.48% 1,781,783 SH
37 MASTERCARD INC-CLASS A MA 57636Q104 $370.8M 0.46% 721,972 SH
38 MICROSOFT CORP MSFT 594918104 $362.6M 0.45% 972,165 SH
39 NETFLIX.COM INC NFLX 64110L106 $341.0M 0.43% 4,776,320 SH
40 S&P GLOBAL SPGI 78409V104 $331.4M 0.42% 813,725 SH
41 BROADCOM INC AVGO 11135F101 $326.7M 0.41% 864,884 SH
42 ORACLE CORP ORCL 68389X105 $299.2M 0.37% 2,041,383 SH
43 ILLUMINA INC ILMN 452327109 $298.9M 0.37% 1,699,679 SH
44 MONSTER BEVERAGE CORPORATION MNST 61174X109 $295.1M 0.37% 3,069,879 SH
45 TRANE TECHNOLOGIES PLC TT G8994E103 $290.6M 0.36% 591,726 SH
46 FACTSET RESEARCH SYSTEMS INC FDS 303075105 $290.2M 0.36% 1,261,298 SH
47 NIKE INC CL B NKE 654106103 $280.2M 0.35% 6,825,831 SH
48 ARM HOLDINGS PLC ARM 042068205 $271.6M 0.34% 765,988 SH
49 NATIXIS LOOMIS FOCUSED GRWTH LSGR 63875W406 $257.5M 0.32% 6,111,318 SH
50 CUMMINS ENGINE CMI 231021106 $253.9M 0.32% 355,936 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-14 $79.79B 1,159 0000312348-26-000034
2026-03-31 2026-05-14 $74.33B 1,168 0000312348-26-000026
2025-12-31 2026-02-12 $82.95B 1,124 0000312348-26-000014
2025-09-30 2025-11-13 $84.08B 1,132 0000312348-25-000035