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 |
iShares Expanded Tech-Software Sector ETF
IGV
|
+$312M |
| 2 |
UnitedHealth
UNH
|
+$286M |
| 3 |
Duolingo
DUOL
|
+$247M |
| 4 |
Aon
AON
|
+$226M |
| 5 |
Chubb
CB
|
+$221M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$338M |
| 2 |
Marvell Technology
MRVL
|
+$241M |
| 3 |
Advanced Micro Devices
AMD
|
+$240M |
| 4 |
ServiceNow
NOW
|
+$203M |
| 5 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$193M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 16.79% |
| 2 | Financials | 14.46% |
| 3 | Healthcare | 12.9% |
| 4 | Consumer Discretionary | 8.97% |
| 5 | Industrials | 8.82% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2701
Alector
ALEC
$257M
| $311K | ﹤0.01% |
222,139
+7,714
| +4% | +$9.66K |
|
2702
VictoryShares US Small Cap High Div Volatility Wtd ETF
CSB
$262M
| $310K | ﹤0.01% |
5,600
-11,500
| -67% | -$627K |
|
|
BBNX
2703
Beta Bionics
BBNX
$888M
| $310K | ﹤0.01% |
21,296
+545
| +3% | +$7.71K |
|
2704
Autodesk
ADSK
$53.7B
| $310K | ﹤0.01% |
1,000
-401,548
| -100% | -$114M |
|
2705
PMV Pharmaceuticals
PMVP
$69.5M
| $309K | ﹤0.01% |
291,455
-61,772
| -17% | -$60.6K |
|
2706
Sphere Entertainment
SPHR
$5.65B
| $307K | ﹤0.01% |
7,338
-68,889
| -90% | -$2.33M |
|
2707
Neurogene
NGNE
$793M
| $306K | ﹤0.01% |
20,497
+9,653
| +89% | +$151K |
|
2708
Rayonier Advanced Materials
RYAM
$563M
| $303K | ﹤0.01% |
78,831
-162,530
| -67% | -$683K |
|
2709
iShares MSCI USA Small-Cap Min Vol Factor ETF
SMMV
$291M
| $302K | ﹤0.01% |
7,200
-23,700
| -77% | -$979K |
|
2710
Design Therapeutics
DSGN
$953M
| $301K | ﹤0.01% |
89,311
-39,436
| -31% | -$148K |
|
2711
Hudbay
HBM
$13.1B
| $300K | ﹤0.01% |
28,318
-199,400
| -88% | -$1.66M |
|
2712
1stdibs.com
DIBS
$157M
| $297K | ﹤0.01% |
108,164
+3,680
| +4% | +$9.53K |
|
2713
Universal Electronics
UEIC
$56.8M
| $297K | ﹤0.01% |
44,805
-22,414
| -33% | -$137K |
|
2714
Korea Electric Power
KEP
$14.5B
| $296K | ﹤0.01% |
+20,774
| New | +$206K |
|
2715
Concrete Pumping Holdings
BBCP
$474M
| $295K | ﹤0.01% |
48,023
-101,461
| -68% | -$644K |
|
2716
Global Net Lease
GNL
$2.13B
| $295K | ﹤0.01% |
39,041
-193,600
| -83% | -$1.47M |
|
2717
BancFirst
BANF
$3.78B
| $295K | ﹤0.01% |
2,384
-1,600
| -40% | -$190K |
|
|
TUYA
2718
Tuya Inc
TUYA
$1.08B
| $294K | ﹤0.01% |
127,472
-805,421
| -86% | -$1.95M |
|
|
BWIN
2719
Baldwin Insurance Group
BWIN
$3.03B
| $294K | ﹤0.01% |
6,875
-6,456
| -48% | -$262K |
|
|
PDS
2720
Precision Drilling
PDS
$1.13B
| $294K | ﹤0.01% |
6,214
-4,487
| -42% | -$200K |
|
|
PWOD
2721
DELISTED
Penns Woods Bancorp
PWOD
| $293K | ﹤0.01% |
9,660
-1,599
| -14% | -$45.9K |
|
2722
iRhythm Holdings
IRTC
$4.13B
| $293K | ﹤0.01% |
+1,900
| New | +$246K |
|
2723
Core Laboratories
CLB
$553M
| $293K | ﹤0.01% |
25,391
-26,769
| -51% | -$318K |
|
2724
Tenaya Therapeutics
TNYA
$151M
| $290K | ﹤0.01% |
474,787
+107,158
| +29% | +$54.5K |
|
|
SNBR
2725
DELISTED
Sleep Number
SNBR
| $290K | ﹤0.01% |
42,931
+1,051
| +3% | +$8.02K |
|
Similar funds
John Overdeck's Q2 2025 Portfolio in Review
As of Q2 2025, John Overdeck held 3,681 positions worth $56.5B, up 21% from $46.8B the previous quarter. Its ten largest holdings account for 7.7% of the portfolio.
John Overdeck deployed $2.96B of net new capital in Q2 2025, opening 509 new positions and adding to 1,200 existing holdings. Its largest new stake was iShares Expanded Tech-Software Sector ETF: 3,154,300 shares worth $345M.
By sector, the portfolio is most concentrated in Technology at 17% of assets, down from 18% a quarter earlier, followed by Financials and Healthcare.
On the sell side, the largest reduction was Broadcom, an estimated $338M trimmed.
- John Overdeck's largest Q2 2025 buy was iShares Expanded Tech-Software Sector ETF: 3,154,300 shares worth $345M.
- John Overdeck added most to UnitedHealth in Q2 2025, an estimated $286M increase.
- John Overdeck's biggest Q2 2025 reduction was Broadcom, cutting an estimated $338M.
- John Overdeck fully exited State Street Utilities Select Sector SPDR ETF in Q2 2025, selling an estimated $134M.
- John Overdeck's ten largest holdings make up 7.7% of its $56.5B portfolio in Q2 2025.
- John Overdeck opened 509 new positions and closed 531 in Q2 2025.
- John Overdeck's portfolio value rose 21% quarter-over-quarter to $56.5B.
Based on Two Sigma Investments's 13F filing for Q2 2025, filed 14 Aug 2025.