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 | |
|---|---|---|---|---|---|---|
2776
Idaho Strategic Resources
IDR
$510M
| $656K | ﹤0.01% |
+19,404
| New | +$458K |
|
|
PINC
2777
DELISTED
Premier
PINC
| $654K | ﹤0.01% |
23,526
-16,576
| -41% | -$400K |
|
2778
Ferrovial N.V. Ordinary Shares
FER
$45.2B
| $654K | ﹤0.01% |
11,267
-25,662
| -69% | -$1.38M |
|
|
DRUG
2779
Bright Minds Biosciences
DRUG
$756M
| $650K | ﹤0.01% |
+10,711
| New | +$416K |
|
|
LAR
2780
Lithium Argentina AG
LAR
$1.1B
| $650K | ﹤0.01% |
194,529
+179,002
| +1,153% | +$541K |
|
2781
VictoryShares US Multi-Factor Minimum Volatility ETF
VSMV
$159M
| $649K | ﹤0.01% |
12,100
+800
| +7% | +$40.8K |
|
|
SRG
2782
Seritage Growth Properties
SRG
$119M
| $648K | ﹤0.01% |
152,361
+62,198
| +69% | +$217K |
|
2783
PUT
Astera Labs
ALAB
$48.1B
| $646K | ﹤0.01% |
+3,300
| New | +$543K |
|
2784
Mesa Laboratories
MLAB
$696M
| $645K | ﹤0.01% |
+9,623
| New | +$693K |
|
2785
Regional Management Corp
RM
$319M
| $644K | ﹤0.01% |
16,533
+151
| +0.9% | +$5.68K |
|
2786
Valens Semiconductor
VLN
$192M
| $643K | ﹤0.01% |
359,194
+21,834
| +6% | +$49.3K |
|
|
VBNK
2787
VersaBank
VBNK
$626M
| $642K | ﹤0.01% |
+52,576
| New | +$607K |
|
2788
Southern First Bancshares
SFST
$597M
| $640K | ﹤0.01% |
+14,516
| New | +$620K |
|
2789
ACNB Corp
ACNB
$655M
| $640K | ﹤0.01% |
14,533
+4,792
| +49% | +$211K |
|
|
ONL
2790
Orion Office REIT
ONL
$166M
| $639K | ﹤0.01% |
236,770
+189,402
| +400% | +$507K |
|
|
RAPP
2791
Rapport Therapeutics
RAPP
$2.37B
| $639K | ﹤0.01% |
21,500
+1,757
| +9% | +$31.3K |
|
2792
PUT
Enphase Energy
ENPH
$4.91B
| $637K | ﹤0.01% |
+18,000
| New | +$669K |
|
2793
PUT
Herbalife
HLF
$1.32B
| $636K | ﹤0.01% |
75,300
+50,100
| +199% | +$472K |
|
2794
Seer Inc
SEER
$113M
| $634K | ﹤0.01% |
292,306
+4,883
| +2% | +$10.4K |
|
2795
908 Devices
MASS
$451M
| $634K | ﹤0.01% |
72,327
+1,333
| +2% | +$8.86K |
|
2796
PUT
WEC Energy
WEC
$35.1B
| $630K | ﹤0.01% |
+5,500
| New | +$596K |
|
2797
CALL
CAVA Group
CAVA
$8.4B
| $628K | ﹤0.01% |
+10,400
| New | +$788K |
|
2798
AXT Inc
AXTI
$4.29B
| $628K | ﹤0.01% |
139,808
-28,632
| -17% | -$81.9K |
|
2799
Fidelity Quality Factor ETF
FQAL
$1.45B
| $628K | ﹤0.01% |
+8,400
| New | +$605K |
|
|
SILA
2800
DELISTED
Sila Realty Trust
SILA
| $628K | ﹤0.01% |
25,000
-299
| -1% | -$7.44K |
|
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.