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Tenaris
TS

229 hedge funds and large institutions have $1.27B invested in Tenaris in 2025 Q4 according to their latest regulatory filings, with 48 funds opening new positions, 76 increasing their positions, 69 reducing their positions, and 37 closing their positions.

New
Increased
Maintained
Reduced
Closed

30% more first-time investments, than exits

New positions opened: 48 | Existing positions closed: 37

10% more repeat investments, than reductions

Existing positions increased: 76 | Existing positions reduced: 69

4% more funds holding

Funds holding: 221 → 229 (+8)

0.47% less ownership

Funds ownership: 6.14% → 5.67% (-0.47%)

1% less capital invested

Capital invested by funds: $1.28B → $1.27B (-$9.7M)

42% less call options, than puts

Call options by funds: $3.39M | Put options by funds: $5.83M

50% less funds holding in top 10

Funds holding in top 10: 4 → 2 (-2)

Holders
229
Holders Change
+8
Holders Change %
+3.62%
% of All Funds
2.78%
Holding in Top 10
2
Holding in Top 10 Change
-2
Holding in Top 10 Change %
-50%
% of All Funds
0.02%
New
48
Increased
76
Reduced
69
Closed
37
Calls
$3.39M
Puts
$5.83M
Net Calls
-$2.44M
Net Calls Change
-$2.69M

Top Buyers

1
Citadel Advisors
Citadel Advisors
Florida
+$35.5M
2
Wellington Management Group
Wellington Management Group
Massachusetts
+$21.1M
3
Invesco
Invesco
Georgia
+$17.6M
4
VanEck Associates
VanEck Associates
New York
+$15.8M
5
Point72 Asset Management
Point72 Asset Management
Connecticut
+$10.3M

Top Sellers

1
ECA
Encompass Capital Advisors
New York
-$51.2M
2
Optiver Holding
Optiver Holding
Netherlands
-$32.4M
3
AA
ABC Arbitrage
France
-$27.7M
4
Millennium Management
Millennium Management
New York
-$16.1M
5
Renaissance Technologies
Renaissance Technologies
New York
-$14.9M
Name Holding Trade Value Shares
Change 		Change in
Stake
ACA
226
American Capital Advisory
Idaho
$154 – – –
RFP
227
Root Financial Partners
California
$115 – – –
MCM
228
MV Capital Management
Maryland
$77 +$77 +2 New
Barclays
229
Barclays
United Kingdom
$38 – – –
ECA
230
Encompass Capital Advisors
New York
– -$51.2M -1,432,704 Closed
Optiver Holding
231
Optiver Holding
Netherlands
– -$32.4M -905,328 Closed
AA
232
ABC Arbitrage
France
– -$27.7M -775,204 Closed
Jane Street
233
Jane Street
New York
– -$14.6M -378,260 Closed
SCM
234
SIR Capital Management
New York
– -$10.4M -290,097 Closed
TI
235
Trexquant Investment
Connecticut
– -$8.97M -250,866 Closed
Qube Research & Technologies (QRT)
236
Qube Research & Technologies (QRT)
United Kingdom
– -$8.62M -240,918 Closed
SSG
237
Summit Securities Group
New York
– -$3.1M -86,766 Closed
PC
238
Pureheart Capital
– -$3.08M -86,000 Closed
KK
239
KLP Kapitalforvaltning
Norway
– -$3.04M -85,000 Closed
RL
240
Ruffer LLP
United Kingdom
– -$2.12M -59,349 Closed
Squarepoint
241
Squarepoint
New York
– -$1.67M -46,792 Closed
CCIA
242
Campbell & Co Investment Adviser
Maryland
– -$1.34M -37,563 Closed
OAC
243
OMERS Administration Corp
Ontario, Canada
– -$948K -26,500 Closed
CIP
244
Capital Insight Partners
Arizona
– -$840K -23,485 Closed
CWM
245
Cornerstone Wealth Management
Missouri
– -$772K -21,580 Closed
BC
246
Bayforest Capital
United Kingdom
– -$622K -17,375 Closed
HF
247
HRT Financial
New York
– -$526K -14,714 Closed
CC
248
Centiva Capital
New York
– -$427K -11,942 Closed
BHCM
249
Brevan Howard Capital Management
Jersey
– -$349K -9,750 Closed
MML Investors Services
250
MML Investors Services
Massachusetts
– -$326K -9,115 Closed
7 8 9
10
11

TS Hedge Fund Activity: Q4 2025 in Review

229 of the 8,223 institutional investors tracked by Wall St. Rank reported a position in Tenaris (TS) for Q4 2025, worth a combined $1.27B — down 0.76% from $1.28B a quarter earlier.

Buyers outnumbered sellers: 48 funds opened new TS positions and 37 closed out — a net gain of 11 holders — while 76 added to existing stakes and 69 trimmed.

The largest buyer was Citadel Advisors, adding an estimated $35.5M. The largest seller was Encompass Capital Advisors, exiting entirely with an estimated $51.2M sold.

  • 229 institutional investors held Tenaris (TS) as of Q4 2025, up from 221 in Q3 2025.
  • Funds reported $1.27B of Tenaris stock for Q4 2025, down 0.76% quarter-over-quarter.
  • 48 funds opened new Tenaris positions in Q4 2025 and 37 closed out, a net change of +11 holders.
  • The largest Tenaris buyer in Q4 2025 was Citadel Advisors, an estimated $35.5M added.
  • The largest Tenaris seller in Q4 2025 was Encompass Capital Advisors, an estimated $51.2M sold.

Based on aggregated 13F filings for Q4 2025.