John Overdeck Two Sigma Investments
John Overdeck is a co-founder of Two Sigma Investments, one of the world’s leading quantitative and technology-driven investment firms. Two Sigma applies data science, machine learning, and large-scale computing to markets across asset classes. Overdeck’s firm is a central reference point in discussions of modern systematic investing.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$474M |
| 2 |
State Street Consumer Staples Select Sector SPDR ETF
XLP
|
+$357M |
| 3 |
Accenture
ACN
|
+$246M |
| 4 |
Advanced Micro Devices
AMD
|
+$235M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$231M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$381M |
| 2 |
State Street Technology Select Sector SPDR ETF
XLK
|
+$375M |
| 3 |
iShares Expanded Tech-Software Sector ETF
IGV
|
+$348M |
| 4 |
Thermo Fisher Scientific
TMO
|
+$292M |
| 5 |
Snowflake
SNOW
|
+$258M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 16.18% |
| 2 | Financials | 15.54% |
| 3 | Industrials | 10.5% |
| 4 | Healthcare | 9.8% |
| 5 | Consumer Discretionary | 8.1% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1126
Ducommun
DCO
$2.78B
| $6.99M | 0.01% |
72,740
+64,999
| +840% | +$5.87M |
|
|
CEPT
1127
DELISTED
Cantor Equity Partners II
CEPT
| $6.99M | 0.01% |
664,999
| – | – |
|
|
CEPO
1128
Cantor Equity Partners I
CEPO
$275M
| $6.99M | 0.01% |
668,125
| – | – |
|
1129
Halliburton
HAL
$28.9B
| $6.98M | 0.01% |
283,845
-1,718,705
| -86% | -$38M |
|
1130
Bain Capital Specialty
BCSF
$786M
| $6.98M | 0.01% |
489,550
+370,156
| +310% | +$5.62M |
|
1131
Mirion Technologies
MIR
$3.66B
| $6.94M | 0.01% |
298,500
+269,850
| +942% | +$5.83M |
|
|
XRPN
1132
Armada Acquisition Corp II
XRPN
$333M
| $6.93M | 0.01% |
664,583
| – | – |
|
1133
KLA
KLAC
$237B
| $6.93M | 0.01% |
64,220
-160
| -0.2% | -$14.9K |
|
1134
10x Genomics
TXG
$8.31B
| $6.91M | 0.01% |
591,394
-434,367
| -42% | -$5.66M |
|
1135
Sun Life Financial
SLF
$44B
| $6.9M | 0.01% |
114,881
-221,610
| -66% | -$13.3M |
|
1136
Steris
STE
$23.2B
| $6.89M | 0.01% |
27,839
-147,537
| -84% | -$35.3M |
|
1137
Zebra Technologies
ZBRA
$17.2B
| $6.88M | 0.01% |
23,152
+10,492
| +83% | +$3.35M |
|
1138
Fidelity Value Factor ETF
FVAL
$1.36B
| $6.87M | 0.01% |
99,800
-2,000
| -2% | -$133K |
|
|
OBA
1139
Oxley Bridge Acquisition Ltd
OBA
$326M
| $6.87M | 0.01% |
+691,364
| New | +$6.87M |
|
1140
Tanger
SKT
$4.47B
| $6.86M | 0.01% |
202,815
+158,045
| +353% | +$5.15M |
|
1141
PUT
Johnson & Johnson
JNJ
$658B
| $6.86M | 0.01% |
+37,000
| New | +$6.34M |
|
|
ACB
1142
Aurora Cannabis
ACB
$249M
| $6.85M | 0.01% |
1,149,869
+1,134,562
| +7,412% | +$5.54M |
|
1143
Organon & Co
OGN
$3.61B
| $6.85M | 0.01% |
641,359
+484,959
| +310% | +$4.76M |
|
1144
FLEX LNG
FLNG
$1.72B
| $6.85M | 0.01% |
271,681
+242,608
| +834% | +$6.02M |
|
1145
OceanFirst Financial
OCFC
$1.83B
| $6.84M | 0.01% |
389,552
+9,422
| +2% | +$168K |
|
1146
Taboola.com
TBLA
$986M
| $6.84M | 0.01% |
2,005,558
+1,070,864
| +115% | +$3.67M |
|
1147
Capitol Federal Financial
CFFN
$1.05B
| $6.84M | 0.01% |
1,076,654
-101,887
| -9% | -$637K |
|
|
DHIL
1148
DELISTED
Diamond Hill
DHIL
| $6.83M | 0.01% |
48,804
+11,383
| +30% | +$1.66M |
|
|
PAII
1149
Pyrophyte Acquisition Corp II
PAII
$280M
| $6.82M | 0.01% |
+684,375
| New | +$6.8M |
|
1150
Diebold Nixdorf
DBD
$2.34B
| $6.81M | 0.01% |
119,443
+85,223
| +249% | +$5.05M |
|
Similar funds
John Overdeck's Q3 2025 Portfolio in Review
As of Q3 2025, John Overdeck held 4,027 positions worth $67.2B, up 19% from $56.5B the previous quarter. Its ten largest holdings account for 6.2% of the portfolio.
John Overdeck deployed $4.46B of net new capital in Q3 2025, opening 877 new positions and adding to 1,461 existing holdings. Its largest new stake was Berkshire Hathaway Class B: 379,096 shares worth $191M.
By sector, the portfolio is most concentrated in Technology at 16% of assets, down from 17% a quarter earlier, followed by Financials and Industrials.
On the sell side, the largest reduction was Invesco QQQ Trust, an estimated $381M trimmed.
- John Overdeck's largest Q3 2025 buy was Berkshire Hathaway Class B: 379,096 shares worth $191M.
- John Overdeck added most to State Street Financial Select Sector SPDR ETF in Q3 2025, an estimated $474M increase.
- John Overdeck's biggest Q3 2025 reduction was Invesco QQQ Trust, cutting an estimated $381M.
- John Overdeck fully exited NextEra Energy, Inc. 6.926% Corporate Units in Q3 2025, selling an estimated $115M.
- John Overdeck's ten largest holdings make up 6.2% of its $67.2B portfolio in Q3 2025.
- John Overdeck opened 877 new positions and closed 399 in Q3 2025.
- John Overdeck's portfolio value rose 19% quarter-over-quarter to $67.2B.
Based on Two Sigma Investments's 13F filing for Q3 2025, filed 14 Nov 2025.