Eric Mandelblatt Soroban Capital Partners
Eric Mandelblatt is the founder of Soroban Capital Partners, a fundamental long/short equity firm. Soroban is known for research-intensive positions and a flexible approach across sectors. Mandelblatt’s public portfolio is followed among large fundamental hedge fund managers.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
TransDigm Group
TDG
|
+$808M |
| 2 |
Amazon
AMZN
|
+$533M |
| 3 |
Union Pacific
UNP
|
+$231M |
| 4 |
Meta Platforms (Facebook)
META
|
+$115M |
| 5 |
Visa
V
|
+$105M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
CDW
CDW
|
+$265M |
| 2 |
Brookfield
BN
|
+$246M |
| 3 |
Western Digital
WDC
|
+$156M |
| 4 |
Seagate
STX
|
+$151M |
| 5 |
Duke Energy
DUK
|
+$67.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 21.47% |
| 2 | Industrials | 15.86% |
| 3 | Utilities | 15.73% |
| 4 | Communication Services | 12.91% |
| 5 | Consumer Discretionary | 12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1
Microsoft
MSFT
$3.59T
| $2.07B | 15.6% |
3,992,613
+84,072
| +2% | +$42.9M |
|
|
2
Amazon
AMZN
$2.79T
| $1.57B | 11.85% |
7,156,836
+2,354,938
| +49% | +$533M |
|
|
3
CALL
Amazon
AMZN
$2.79T
| $1.1B | 8.28% |
+5,000,000
| New | +$1.13B |
|
4
Alphabet (Google) Class C
GOOG
$4.18T
| $871M | 6.57% |
3,575,580
| – | – |
|
5
Ferguson
FERG
$46.9B
| $821M | 6.19% |
3,655,636
-49,420
| -1% | -$11.2M |
|
|
6
TransDigm Group
TDG
$66.4B
| $766M | 5.78% |
581,105
+565,543
| +3,634% | +$808M |
|
7
Mastercard
MA
$509B
| $625M | 4.71% |
1,098,573
+61,400
| +6% | +$35.3M |
|
|
8
Visa
V
$693B
| $577M | 4.35% |
1,691,441
+302,437
| +22% | +$105M |
|
|
9
Meta Platforms (Facebook)
META
$1.4T
| $535M | 4.03% |
728,246
+154,161
| +27% | +$115M |
|
10
TSMC
TSM
$2.17T
| $515M | 3.88% |
1,844,234
| – | – |
|
11
American Electric Power
AEP
$65.8B
| $451M | 3.4% |
4,004,686
| – | – |
|
12
Southern Company
SO
$102B
| $403M | 3.04% |
4,250,074
+152,652
| +4% | +$14.3M |
|
13
Rexford Industrial Realty
REXR
$8.3B
| $378M | 2.85% |
9,191,038
| – | – |
|
14
Entergy
ETR
$48.8B
| $320M | 2.42% |
3,438,934
+147,854
| +4% | +$13M |
|
|
15
Alphabet (Google) Class A
GOOGL
$4.22T
| $306M | 2.31% |
1,257,370
| – | – |
|
16
CSX Corp
CSX
$95.6B
| $275M | 2.07% |
7,732,942
| – | – |
|
|
17
Union Pacific
UNP
$183B
| $242M | 1.82% |
+1,022,833
| New | +$231M |
|
18
NiSource
NI
$19.5B
| $223M | 1.68% |
5,149,167
+714,922
| +16% | +$29.6M |
|
|
19
Brookfield
BN
$93.1B
| $175M | 1.32% |
5,745,528
-5,556,273
| -49% | -$246M |
|
20
FirstEnergy
FE
$26.6B
| $152M | 1.14% |
3,312,944
-353,122
| -10% | -$15.1M |
|
|
21
Western Digital
WDC
$166B
| $138M | 1.04% |
1,146,273
-1,914,861
| -63% | -$156M |
|
22
Ameren
AEE
$29.4B
| $130M | 0.98% |
1,248,221
-130,760
| -9% | -$13.1M |
|
|
23
Seagate
STX
$193B
| $126M | 0.95% |
534,364
-883,236
| -62% | -$151M |
|
24
WEC Energy
WEC
$34.5B
| $126M | 0.95% |
1,097,900
+769,447
| +234% | +$83.4M |
|
25
DTE Energy
DTE
$28.1B
| $120M | 0.91% |
849,813
-67,938
| -7% | -$9.31M |
|
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Eric Mandelblatt's Q3 2025 Portfolio in Review
As of Q3 2025, Eric Mandelblatt held 33 positions worth $13.3B, up 29% from $10.3B the previous quarter. Its ten largest holdings account for 71% of the portfolio.
Eric Mandelblatt deployed $2.26B of net new capital in Q3 2025, opening 4 new positions and adding to 12 existing holdings. Its largest new stake was Union Pacific: 1,022,833 shares worth $242M.
By sector, the portfolio is most concentrated in Technology at 21% of assets, down from 30% a quarter earlier, followed by Industrials and Utilities.
On the sell side, the largest reduction was Brookfield, an estimated $246M trimmed.
- Eric Mandelblatt's largest Q3 2025 buy was Union Pacific: 1,022,833 shares worth $242M.
- Eric Mandelblatt added most to TransDigm Group in Q3 2025, an estimated $808M increase.
- Eric Mandelblatt's biggest Q3 2025 reduction was Brookfield, cutting an estimated $246M.
- Eric Mandelblatt fully exited CDW in Q3 2025, selling an estimated $265M.
- Eric Mandelblatt's ten largest holdings make up 71% of its $13.3B portfolio in Q3 2025.
- Eric Mandelblatt opened 4 new positions and closed 3 in Q3 2025.
- Eric Mandelblatt's portfolio value rose 29% quarter-over-quarter to $13.3B.
Based on Soroban Capital Partners's 13F filing for Q3 2025, filed 14 Nov 2025.