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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 and exited 93; 385 existing positions rose in reported value and 160 fell.

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.

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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

Portfolio charts

Latest quarter's book, what changed, and how the portfolio has evolved across filings.

Portfolio map

Q2 26
NVDA9.9% · -4%GOOGL7.7% · -1%TSLA6.7% · +0%AMZN5.5% · -0%META5.3% · +1%V3.9% · -2%BA3.8% · -1%MSFT3.6% · +28%NFLX3.6% · +5%ORCL3.1% · -1%MNST3.0% · -4%VRTX2.4% · -2%SHOP2.1% · 0%DIS1.6% · -3%ADSK1.5% · +10%REGN1.5% · -3%CRM1.3% · +6%GOOG1.2% · -5%SBUX1.2% · -3%EXPD1.1% · -2%NVO1.1% · +9%DE1.1% · -0%NVS1.0% · -3%SEIC0.9% · -2%TMO0.8% · -4%ISRG0.8% · -3%BKNG0.8% · +2678%YUM0.7% · -2%XYZ0.7% · -1%MA0.5% · +18%LSGR0.4% · +8%ILMN0.4% · -34%SPGI0.4% · +21%FDS0.4% · -3%AVGO0.4% · +1284%NKE0.4% · -2%TT0.4% · +17%WDAY0.4% · +10%ARM0.3% · -9%CMI0.3% · +6%TSM0.3% · -26%KLAC0.3% · +516%MELI0.3% · +36%PH0.3% · -14%HLT0.3% · -16%GS0.2% · -10%BLK0.2% · -5%JPM0.2% · -9%ORLY0.2% · -3%ALNY0.2% · +12%COST0.2% · -7%PGR0.2% · -3%ABNB0.2% · -19%RBC0.2% · -5%AEIS0.2% · -21%HD0.1% · -26%LIN0.1% · -28%ATI0.1% · -11%ALGM0.1% · -3%LTH0.1% · -5%

Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.

Sector mix

% of 13F value

Sectors from each company's SIC code; funds and ETFs grouped separately.

Biggest buys and sells

Q1 26 → Q2 26

Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.

13F assets and positions

4 quarters

Total reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.

Top positions over time

reported value

The eight largest current positions, valued at each quarter end.

Concentration

top 10 = 53%

Cumulative share of the portfolio held in the largest N positions.

Firm Profile & Key People

Name Title / Status Ownership Type

Quarter-over-quarter changes

Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.

Top Adds (vs prior quarter)

Show all 385 →

Top Trims

Show all 160 →

New Positions

Show all 82 →

Exited Positions

Show all 93 →

LOOMIS SAYLES & CO L P Holdings (2026-06-30)

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
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