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 | |
|---|---|---|---|---|---|---|
2676
Seanergy Maritime Holdings
SHIP
$386M
| $763K | ﹤0.01% |
92,322
-10,823
| -10% | -$82.1K |
|
2677
Royal Gold
RGLD
$22.2B
| $762K | ﹤0.01% |
3,800
-8,871
| -70% | -$1.53M |
|
2678
Baker Hughes
BKR
$62.3B
| $762K | ﹤0.01% |
15,634
+3,334
| +27% | +$147K |
|
2679
ARK Genomic Revolution ETF
ARKG
$1.91B
| $761K | ﹤0.01% |
27,400
-97,800
| -78% | -$2.47M |
|
|
URG
2680
Ur-Energy
URG
$569M
| $761K | ﹤0.01% |
+424,899
| New | +$576K |
|
2681
Kamada
KMDA
$491M
| $761K | ﹤0.01% |
109,589
+4,504
| +4% | +$32.8K |
|
2682
Erasca
ERAS
$6.46B
| $758K | ﹤0.01% |
347,767
-79,836
| -19% | -$127K |
|
2683
CALL
Marvell Technology
MRVL
$219B
| $757K | ﹤0.01% |
+9,000
| New | +$662K |
|
|
2684
PUT
Marvell Technology
MRVL
$219B
| $757K | ﹤0.01% |
+9,000
| New | +$662K |
|
2685
Immuneering
IMRX
$342M
| $755K | ﹤0.01% |
107,871
+89,318
| +481% | +$464K |
|
2686
Lexicon Pharmaceuticals
LXRX
$1.05B
| $755K | ﹤0.01% |
559,008
+155,086
| +38% | +$176K |
|
2687
PUT
Wells Fargo
WFC
$255B
| $754K | ﹤0.01% |
+9,000
| New | +$730K |
|
2688
Gevo
GEVO
$403M
| $753K | ﹤0.01% |
383,984
-3,858
| -1% | -$6.29K |
|
2689
CALL
United Parcel Service
UPS
$88.4B
| $752K | ﹤0.01% |
+9,000
| New | +$815K |
|
2690
Anika Therapeutics
ANIK
$292M
| $751K | ﹤0.01% |
+79,921
| New | +$763K |
|
2691
Quantum Computing Inc
QUBT
$1.88B
| $749K | ﹤0.01% |
40,705
+1,001
| +3% | +$17.2K |
|
2692
Neonode
NEON
$15M
| $749K | ﹤0.01% |
+214,650
| New | +$3.96M |
|
|
DENN
2693
DELISTED
Denny's
DENN
| $748K | ﹤0.01% |
143,103
-148,027
| -51% | -$656K |
|
|
ELP
2694
DELISTED
Companhia Paranaense de Energia (COPEL)
ELP
| $747K | ﹤0.01% |
76,264
-46,158
| -38% | -$415K |
|
2695
8x8 Inc
EGHT
$282M
| $746K | ﹤0.01% |
352,059
-162,504
| -32% | -$327K |
|
2696
Spire
SR
$4.87B
| $746K | ﹤0.01% |
9,146
-7,554
| -45% | -$575K |
|
2697
On Holding
ONON
$9.57B
| $745K | ﹤0.01% |
17,587
-1,939,667
| -99% | -$92.3M |
|
2698
PUT
Duke Energy
DUK
$95B
| $743K | ﹤0.01% |
+6,000
| New | +$728K |
|
2699
AudioCodes
AUDC
$235M
| $742K | ﹤0.01% |
77,962
-280
| -0.4% | -$2.75K |
|
2700
iShares US Infrastructure ETF
IFRA
$4.25B
| $739K | ﹤0.01% |
+14,000
| New | +$718K |
|
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.