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 | |
|---|---|---|---|---|---|---|
2501
Euroseas
ESEA
$543M
| $989K | ﹤0.01% |
+16,587
| New | +$934K |
|
|
AMRN
2502
Amarin Corp
AMRN
$299M
| $984K | ﹤0.01% |
60,071
+1,047
| +2% | +$16.3K |
|
|
SNCY
2503
DELISTED
Sun Country Airlines
SNCY
| $982K | ﹤0.01% |
83,134
-149,496
| -64% | -$1.85M |
|
2504
Imperial Oil
IMO
$63.6B
| $980K | ﹤0.01% |
10,800
-22,200
| -67% | -$1.92M |
|
|
AVBH
2505
Avidbank Holdings
AVBH
$349M
| $979K | ﹤0.01% |
+38,398
| New | +$960K |
|
2506
Fidelity Magellan ETF
FMAG
$246M
| $979K | ﹤0.01% |
27,800
-4,000
| -13% | -$139K |
|
|
AMWD
2507
DELISTED
American Woodmark
AMWD
| $977K | ﹤0.01% |
14,633
-9,535
| -39% | -$585K |
|
2508
Shattuck Labs
STTK
$809M
| $977K | ﹤0.01% |
408,598
+331,664
| +431% | +$406K |
|
2509
RCM Technologies
RCMT
$299M
| $977K | ﹤0.01% |
36,781
-13,443
| -27% | -$345K |
|
|
STLN
2510
Starling Oncology
STLN
$642M
| $974K | ﹤0.01% |
278,967
+802
| +0.3% | +$2.75K |
|
2511
monday.com
MNDY
$3.94B
| $973K | ﹤0.01% |
5,026
-48,574
| -91% | -$11.2M |
|
2512
PUT
Alphabet (Google) Class A
GOOGL
$4.24T
| $972K | ﹤0.01% |
+4,000
| New | +$838K |
|
2513
Westwater Resources
WWR
$77M
| $972K | ﹤0.01% |
+1,024,955
| New | +$770K |
|
2514
PUT
Roblox
RBLX
$27.9B
| $970K | ﹤0.01% |
+7,000
| New | +$870K |
|
2515
Bank7 Corp
BSVN
$495M
| $968K | ﹤0.01% |
20,928
+7,946
| +61% | +$371K |
|
2516
SITE Centers
SITC
$156M
| $968K | ﹤0.01% |
+107,432
| New | +$1.14M |
|
2517
Willis Towers Watson
WTW
$32.2B
| $967K | ﹤0.01% |
2,800
+500
| +22% | +$162K |
|
2518
Gilat Satellite Networks
GILT
$780M
| $967K | ﹤0.01% |
74,263
-104,355
| -58% | -$957K |
|
2519
TechTarget
TTGT
$281M
| $967K | ﹤0.01% |
+166,402
| New | +$1.1M |
|
2520
TransUnion
TRU
$16.3B
| $964K | ﹤0.01% |
11,510
+3,400
| +42% | +$309K |
|
|
EFSI
2521
Eagle Financial Services Inc
EFSI
$228M
| $964K | ﹤0.01% |
25,478
+9,798
| +62% | +$345K |
|
|
P
2522
Everpure Inc
P
$34.2B
| $964K | ﹤0.01% |
11,500
-34,500
| -75% | -$2.29M |
|
2523
Solid Biosciences
SLDB
$1.06B
| $962K | ﹤0.01% |
155,850
-18,150
| -10% | -$106K |
|
2524
VictoryShares US Small Cap High Div Volatility Wtd ETF
CSB
$261M
| $958K | ﹤0.01% |
16,200
+10,600
| +189% | +$617K |
|
2525
LPL Financial
LPLA
$28.5B
| $956K | ﹤0.01% |
2,875
-3,816
| -57% | -$1.38M |
|
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.