Institutional Manager · CIK 0000312348
LOOMIS SAYLES & CO L P
BOSTON, MA · File #028-00398
Latest AUM
$82.95B
Positions
1,124
Top-10 Concentration
57.3%
Filings
9
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| REDUCE | THE WALT DISNEY CO | 254687106 | -11,124,017 | -$1.27B | -$9.4M |
| ADD | NETFLIX.COM INC | NFLX | +4,292,962 | +$402.5M | -$521.5M |
| ADD | S&P GLOBAL | SPGI | +633,814 | +$331.2M | +$82,775 |
| ADD | LINDE PLC | LIN | +441,698 | +$188.3M | -$78,019 |
| REDUCE | AIRBNB INC | ABNB | -1,202,649 | -$163.2M | +$17.2M |
| ADD | PROGRESSIVE CORP | 743315103 | +460,278 | +$104.8M | -$2.8M |
| ADD | INVESCO SENIOR LOAN | IVZ | +1,800,571 | +$37.8M | +$8,960 |
| ADD | ALPHABET INC-CL A | GOOG | +112,774 | +$35.3M | +$135.6M |
| NEW | CHIPOTLE MEXICAN GRILL INC | CMG | +925,467 | +$34.2M | $0 |
| REDUCE | BUILDERS FIRSTSOURCE INC | BLDR | -294,280 | -$30.3M | -$10.8M |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 20251,124 pos · $82.95B
- 13F HOLDINGS REPORTQ/E Sep 20251,132 pos · $84.08B
- 13F HOLDINGS REPORTQ/E Jun 20251,145 pos · $79.80B
- 13F HOLDINGS REPORTQ/E Mar 20251,086 pos · $69.2M
- 13F HOLDINGS REPORTQ/E Dec 20241,079 pos · $79.2M
- 13F HOLDINGS REPORTQ/E Sep 20241,044 pos · $76.2M
- 13F HOLDINGS REPORTQ/E Jun 20241,079 pos · $72.6M
- 13F HOLDINGS REPORTQ/E Mar 20241,058 pos · $70.3M
- 13F HOLDINGS REPORTQ/E Dec 20231,277 pos · $58.2M
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | NVIDIA CORP | NVDA | 35,329,114 | $6.59B | 9.91% |
| 2 | TESLA INC | TSLA | 11,045,508 | $4.97B | 7.47% |
| 3 | ALPHABET INC-CL A | GOOG | 15,089,364 | $4.72B | 7.11% |
| 4 | META PLATFORMS INC | META | 6,491,745 | $4.29B | 6.45% |
| 5 | AMAZON.COM INC | AMZN | 15,825,106 | $3.65B | 5.50% |
| 6 | NETFLIX.COM INC | NFLX | 32,465,546 | $3.04B | 4.58% |
| 7 | VISA INC-CLASS A SHRS | V | 8,083,598 | $2.83B | 4.27% |
| 8 | ORACLE CORP | ORCL-PD | 14,163,875 | $2.76B | 4.15% |
| 9 | BOEING CO | BA-PA | 12,382,532 | $2.69B | 4.05% |
| 10 | MICROSOFT CORP | MSFT | 5,259,702 | $2.54B | 3.83% |
| 11 | SHOPIFY INC - CLASS A | SHOP | 12,778,020 | $2.06B | 3.09% |
| 12 | MONSTER BEVERAGE CORPORATION | MNST | 23,206,079 | $1.78B | 2.68% |
| 13 | VERTEX PHARMACEUTICALS INC | VRTX | 3,543,530 | $1.61B | 2.42% |
| 14 | AUTODESK INC | ADSK | 5,114,652 | $1.51B | 2.28% |
| 15 | SALESFORCE.COM INC | CRM | 5,369,787 | $1.42B | 2.14% |
| 16 | THE WALT DISNEY CO | 254687106 | 12,471,500 | $1.42B | 2.13% |
| 17 | REGENERON PHARMACEUTICALS | REGN | 1,702,995 | $1.31B | 1.98% |
| 18 | NVIDIA CORP | NVDA | 5,011,554 | $934.7M | 1.41% |
| 19 | INTUITIVE SURGICAL INC | ISRG | 1,510,177 | $855.3M | 1.29% |
| 20 | ALPHABET INC-CL C | GOOG | 2,543,035 | $798.0M | 1.20% |