Tenaris

TS • NYSE

Tenaris is a publicly traded company on NYSE. As of Q3 2025, 206 institutional investors hold shares in this company, with total holdings valued at $866.2M. RENAISSANCE TECHNOLOGIES LLC is the largest holder with a position valued at $119.9M.

Employees29.1K

Websitetenaris.com

Overview

Overview of institutional ownership in TS as of Q3 2025

All Institutions

Institutions: 206
Value Held: $866.2M
Shares Held: 24.2M
Avg Position: $4.2M
Median Position: $432.2K

Hedge Funds

Hedge Funds: 19
Value Held: $249.1M
Shares Held: 7.0M
Avg Position: $13.1M
Median Position: $2.5M

Biggest Investors

Institutions with the largest positions in TS as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant	Peter Fitzhugh Brown CEO	$119.9M 0.16% of portfolio	0.00% 3.4M shares	Q2 2024 Held for 1y 5m	$75.8B
FMR LLC Institution	-	$82.1M 0.00% of portfolio	0.00% 2.3M shares	Q4 2022 Held for 2y 11m	$1.92T
WELLINGTON MANAGEMENT CO LLP Long Only Manager	Jean Marie Hynes CEO	$76.4M 0.01% of portfolio	0.00% 2.1M shares	Q4 2022 Held for 2y 11m	$571.21B
Encompass Capital Advisors LLC Hedge Fund•Long/Short	Todd Jason Kantor Managing Partner	$51.2M 2.29% of portfolio	0.00% 1.4M shares	Q1 2025 Held for 8 months	$2.2B
MORGAN STANLEY RIA/Wealth	Jed Finn CEO	$41.9M 0.00% of portfolio	0.00% 1.2M shares	Q4 2022 Held for 2y 11m	$1.65T
DIMENSIONAL FUND ADVISORS LP Long Only Manager	David Paul Butler CEO	$40.6M 0.01% of portfolio	0.00% 1.1M shares	Q1 2023 Held for 2y 8m	$466.32B
O Optiver Holding B.V. Institution	-	$32.4M 0.53% of portfolio	0.00% 905.3K shares	Q1 2023 Held for 2y 8m	$6.1B
A ABC ARBITRAGE SA Institution	-	$27.7M 2.73% of portfolio	0.00% 775.2K shares	Q4 2024 Held for 11 months	$1.0B
GOLDMAN SACHS GROUP INC Institution	David M. Solomon CEO	$25.2M 0.00% of portfolio	0.00% 705.2K shares	Q4 2022 Held for 2y 11m	$691.34B
B BlackRock, Inc. Institution	-	$22.9M 0.00% of portfolio	0.00% 641.1K shares	Q4 2022 Held for 2y 11m	$5.67T

Net Capital Flow

Institutional buying and selling activity for TS in Q3 2025

Traded: −$289.7M
Buyers: 113
Sellers: 90
Total Bought: +$127.3M
Total Sold: −$417.0M
Avg Position: $3.6M

Biggest Buyers

Institution	Net Bought	Current Position
O Optiver Holding B.V. Institution	+$21.1M +589.6K shares	$32.4M 905.3K shares
RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant	+$16.4M +459.1K shares	$119.9M 3.4M shares
D D. E. Shaw & Co., Inc. Institution	+$13.4M +375.1K shares	$21.4M 597.1K shares
A ABC ARBITRAGE SA Institution	+$11.0M +307.9K shares	$27.7M 775.2K shares
Q Qube Research & Technologies Ltd Institution	+$8.6M +240.9K shares	$8.6M 240.9K shares
T Tower Research Capital LLC Institution	+$8.0M +222.9K shares	$8.2M 228.7K shares
DIMENSIONAL FUND ADVISORS LP Long Only Manager	+$6.9M +192.8K shares	$40.6M 1.1M shares
LAZARD ASSET MANAGEMENT LLC Long Only Manager	+$4.5M +-24.0K shares	$4.5M 124.5K shares
K KLP KAPITALFORVALTNING AS Institution	+$3.0M +55.0K shares	$3.0M 85.0K shares
J JANE STREET GROUP, LLC Institution	+$3.0M +83.0K shares	$13.5M 378.3K shares

Biggest Sellers

Institution	Net Sold	Current Position
Sourcerock Group LLC Hedge Fund•Long/Short	−$115.4M −3.1M shares	Sold Off 0 shares
BALYASNY ASSET MANAGEMENT LLC Hedge Fund•Multi-Strategy	−$66.1M −1.8M shares	Sold Off 0 shares
UBS Group AG Institution	−$47.1M −1.3M shares	$9.6M 269.5K shares
CAPSTONE INVESTMENT ADVISORS, LLC Hedge Fund•Multi-Strategy	−$34.5M −921.5K shares	Sold Off 0 shares
Merewether Investment Management, LP Hedge Fund•Sector	−$20.0M −533.5K shares	Sold Off 0 shares
BANK OF AMERICA CORP /DE/ Institution	−$14.4M −401.8K shares	$6.9M 193.8K shares
S SIR Capital Management, L.P. Hedge Fund•Long/Short	−$14.3M −398.8K shares	$10.4M 290.1K shares
F Freestone Grove Partners LP Hedge Fund•Multi-Strategy	−$13.6M −362.5K shares	Sold Off 0 shares
Encompass Capital Advisors LLC Hedge Fund•Long/Short	−$10.7M −300.1K shares	$51.2M 1.4M shares
C Cubist Systematic Strategies, LLC Institution	−$9.1M −243.4K shares	Sold Off 0 shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited TS in Q3 2025

New Positions: 27
New Value: $14.5M
Exited Positions: 35
Exited Value: $293.4M

New Positions

Institution	Position Value
LAZARD ASSET MANAGEMENT LLC Long Only Manager	$4.5M 124.5K shares
K KLP KAPITALFORVALTNING AS Institution	$3.0M 85.0K shares
L LMR Partners LLP Institution	$1.5M 42.1K shares
N NEW YORK STATE COMMON RETIREMENT FUND Institution	$1.5M 41.1K shares
GABELLI FUNDS LLC Long Only Manager	$715.4K 20.0K shares
C Corient IA LLC Fund of Funds	$536.6K 15.0K shares
Dynasty Wealth Management, LLC Fund of Funds	$467.4K 13.1K shares
Hennion & Walsh Asset Management, Inc. RIA/Wealth	$437.0K 12.2K shares
D DRW Securities, LLC Institution	$412.9K 11.3K shares
B Brevan Howard Capital Management LP Institution	$348.8K 9.8K shares

Exited Positions

Institution	Previous Position
Sourcerock Group LLC Hedge Fund•Long/Short	$115.4M 3.1M shares
BALYASNY ASSET MANAGEMENT LLC Hedge Fund•Multi-Strategy	$66.1M 1.8M shares
CAPSTONE INVESTMENT ADVISORS, LLC Hedge Fund•Multi-Strategy	$34.5M 921.5K shares
Merewether Investment Management, LP Hedge Fund•Sector	$20.0M 533.5K shares
F Freestone Grove Partners LP Hedge Fund•Multi-Strategy	$13.6M 362.5K shares
C Cubist Systematic Strategies, LLC Institution	$9.1M 243.4K shares
Q Quadrature Capital Ltd Institution	$8.8M 457.0K shares
BOOTHBAY FUND MANAGEMENT, LLC Fund of Funds	$5.2M 138.7K shares
UBS GLOBAL ASSET MANAGEMENT AMERICAS INC Long Only Manager	$4.0M 106.5K shares
Verition Fund Management LLC Hedge Fund•Multi-Strategy	$3.8M 101.2K shares

Options Activity

Institutions with the largest Call and Put options positions in TS as of Q3 2025

Call Positions: 6
Call Value: $3.4M
Put Positions: 4
Put Value: $3.7M

Call Positions

Institution	Position Value
Verition Fund Management LLC Hedge Fund•Multi-Strategy	$1.1M 300.0 contracts
J JANE STREET GROUP, LLC Institution	$994.4K 278.0 contracts
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$980.1K 274.0 contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$389.9K 109.0 contracts
T Twin Tree Management, LP Hedge Fund•Vol Arbitrage	$3.6K 1.0 contracts
Walleye Trading LLC RIA/Wealth	- - contracts

Put Positions

Institution	Position Value
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$1.8M 516.0 contracts
Walleye Trading LLC RIA/Wealth	$1.3M 365.0 contracts
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$515.1K 144.0 contracts
W WOLVERINE TRADING, LLC Institution	- - contracts

Most Committed Institutions

Institutions with TS as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
M Medina Singh Partners, LLC Hedge Fund•Value	Kristofer Lee Medina Managing Partner	4.69% $20.1M	0.00% 561.0K shares	Q3 2024 Held for 1y 2m	$428.0M
A ABC ARBITRAGE SA Institution	-	2.73% $27.7M	0.00% 775.2K shares	Q4 2024 Held for 11 months	$1.0B
Encompass Capital Advisors LLC Hedge Fund•Long/Short	Todd Jason Kantor Managing Partner	2.29% $51.2M	0.00% 1.4M shares	Q1 2025 Held for 8 months	$2.2B
Kiltearn Partners LLP Long Only Manager	Murdoch Ross Murchison CEO	2.14% $10.7M	0.00% 298.5K shares	Q4 2023 Held for 1y 11m	$498.9M
W WHITE BAY PT LLC Institution	-	1.03% $3.1M	0.00% 86.8K shares	Q2 2025 Held for 5 months	$302.5M
S SIR Capital Management, L.P. Hedge Fund•Long/Short	Mirco Ronald Elias CFO	0.93% $10.4M	0.00% 290.1K shares	Q4 2022 Held for 2y 11m	$1.1B
O Optiver Holding B.V. Institution	-	0.53% $32.4M	0.00% 905.3K shares	Q1 2023 Held for 2y 8m	$6.1B
J2 Capital Management Inc RIA/Wealth	John Nmn Salomon President	0.43% $567.9K	0.00% 15.9K shares	Q4 2024 Held for 11 months	$132.9M
C Corient IA LLC Fund of Funds	Francisco Tobias Marin CFO	0.42% $536.6K	0.00% 15.0K shares	Q3 2025 Held for 2 months	$128.0M
Integrated Quantitative Investments LLC Long Only Manager	Kirsten Anna Syverson CEO	0.42% $1.5M	0.00% 41.1K shares	Q2 2025 Held for 5 months	$351.3M