LOOMIS SAYLES & CO L P

View all activity View 13F on SEC

Data as of Q4 2025

Institutional investor tracked via SEC 13F filings. Portfolio snapshot as of 2025-12-31.SEC EDGAR Source

Assets Under Management

$83B

Total Positions

695

New This Quarter

Filing Period

2025-12-31

Portfolio Allocation

Top holdings by portfolio weight

NVDA9.07%

TSLA6.86%

GOOGL6.47%

META5.89%

AMZN5.00%

NFLX4.21%

V3.90%

ORCL3.81%

BA3.71%

MSFT3.50%

Other23.25%

Position Outcomes

Best and worst performing positions by estimated return

Top Winners

VST29Q held

Vistra Corp

Avg $21.28 · $784,987 est. P&L

Est. P&L

+664.09%

MTSI24Q held

MACOM Technology Solutions Holdings Inc

Avg $23.68 · $73.2M est. P&L

Est. P&L

+638.59%

INSM21Q held

Insmed Inc

Avg $26.72 · $29.5M est. P&L

Est. P&L

+551.65%

Top Losers

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View plans

Cost basis estimates based on full filing history using quarter-end prices. Actual transaction prices are not disclosed in 13F filings.

Top Holdings(Showing 25 of 695 — sorted by value)

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Activity:

Stock	Shares	Value	Weight	Price Trend	Avg Buy	Est. P&L	Held	Conviction
NVDA NVIDIA Corp	40.3M	$7.5B	9.1%	—	$112.06	+67.35%	28 qtrs	Decreased 0
TSLA Tesla Inc	12.6M	$5.7B	6.9%	—	$209.24	+117.19%	22 qtrs	Decreased 0
GOOGL Alphabet Inc	17.1M	$5.4B	6.5%	—	$96.03	+226.82%	29 qtrs	Decreased 0
META Meta Platforms Inc	7.4M	$4.9B	5.9%	—	$138.14	+382.09%	29 qtrs	Decreased 0
AMZN Amazon.com Inc	18M	$4.1B	5.0%	—	$108.77	+113.79%	29 qtrs	Decreased 0
NFLX Netflix Inc	37.2M	$3.5B	4.2%	—	$87.33	+7.38%	22 qtrs	Increased 94
V Visa Inc	9.2M	$3.2B	3.9%	—	$136.65	+158.24%	29 qtrs	Decreased 0
ORCL Oracle Corp	16.2M	$3.2B	3.8%	—	$41.42	+374.82%	29 qtrs	Decreased 0
BA Boeing Co/The	14.2M	$3.1B	3.7%	—	$187.74	+16.38%	29 qtrs	Decreased 0
MSFT Microsoft Corp	6M	$2.9B	3.5%	—	$98.79	+393.43%	29 qtrs	Decreased 0
SHOP Shopify Inc	14.5M	$2.3B	2.8%	—	$42.10	+288.94%	17 qtrs	Decreased 0
MNST Monster Beverage Corp	26.3M	$2B	2.4%	—	$39.98	+93.65%	29 qtrs	Decreased 0
VRTX Vertex Pharmaceuticals Inc	4M	$1.8B	2.2%	—	$244.40	+85.65%	25 qtrs	Decreased 0
ADSK Autodesk Inc	5.8M	$1.7B	2.1%	—	$137.45	+117.93%	29 qtrs	Decreased 0
DIS Walt Disney Co/The	14.2M	$1.6B	1.9%	—	$120.89	-5.05%	29 qtrs	Decreased 0
CRM Salesforce Inc	6.1M	$1.6B	1.9%	—	$175.12	+51.85%	24 qtrs	Decreased 0
REGN Regeneron Pharmaceuticals Inc	1.9M	$1.5B	1.8%	—	$463.10	+67.12%	29 qtrs	Decreased 0
ISRG Intuitive Surgical Inc	1.7M	$971.6M	1.2%	—	$299.95	+90.91%	24 qtrs	Decreased 0
GOOG Alphabet Inc	2.9M	$905.6M	1.1%	—	$94.90	+231.46%	29 qtrs	Decreased 0
NVO NOVO-NORDISK A S	17.1M	$871.8M	1.1%	—	$59.50	-13.91%	29 qtrs	Increased 53
EXPD Expeditors International of Washington Inc	5.7M	$848.2M	1.0%	—	$63.79	+135.33%	29 qtrs	Decreased 0
TMO Thermo Fisher Scientific Inc	1.4M	$798.8M	1.0%	—	$506.49	+15.19%	29 qtrs	Decreased 0
SBUX Starbucks Corp	9.5M	$798.2M	1.0%	—	$65.36	+29.58%	29 qtrs	Decreased 0
NVS NOVARTIS AG	5.5M	$763M	0.9%	—	$72.07	+92.48%	29 qtrs	Decreased 0
QCOM QUALCOMM Inc	4.3M	$729.1M	0.9%	—	$49.69	+249.48%	29 qtrs	Decreased 0
Showing 25 of 695 results.PROUpgrade to see all →

Accumulation Streaks

Positions with 2+ consecutive quarters of increases — persistent directional conviction.

Security

BKNGBooking Holdings Inc

Q3 2024 → Q4 2025+1,738 shares+$10.6M

PDPagerDuty Inc

Q3 2024 → Q4 2025+486,980 shares+$14.3M

CXTCrane NXT Co

Q4 2024 → Q4 2025+315,793 shares+$32.6M

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Data sourced from SEC EDGAR 13F filings. Not financial advice. Full disclaimer