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 | |
|---|---|---|---|---|---|---|
|
AMRN
2201
Amarin Corp
AMRN
$296M
| $957K | ﹤0.01% |
59,024
-33,773
| -36% | -$380K |
|
2202
Tilray
TLRY
$665M
| $956K | ﹤0.01% |
230,769
+166,446
| +259% | +$755K |
|
2203
Global X Genomics & Biotechnology ETF
GNOM
$96.4M
| $956K | ﹤0.01% |
28,350
+6,475
| +30% | +$205K |
|
2204
Ecovyst
ECVT
$1.11B
| $955K | ﹤0.01% |
115,998
-180,087
| -61% | -$1.26M |
|
2205
Donaldson
DCI
$10.7B
| $955K | ﹤0.01% |
13,765
-7,624
| -36% | -$513K |
|
2206
CACI
CACI
$13.6B
| $953K | ﹤0.01% |
2,000
-11,798
| -86% | -$5.23M |
|
2207
Bank First Corp
BFC
$1.7B
| $953K | ﹤0.01% |
8,101
+3,659
| +82% | +$407K |
|
|
FLNA
2208
Filana Therapeutics
FLNA
$44.9M
| $953K | ﹤0.01% |
526,515
+93,934
| +22% | +$167K |
|
|
SUPV
2209
Grupo Supervielle
SUPV
$744M
| $949K | ﹤0.01% |
89,658
+27,364
| +44% | +$371K |
|
|
CNTA
2210
DELISTED
Centessa Pharmaceuticals
CNTA
| $948K | ﹤0.01% |
72,144
+56,844
| +372% | +$720K |
|
|
NPKI
2211
NPK International
NPKI
$1.12B
| $937K | ﹤0.01% |
110,151
+14,311
| +15% | +$105K |
|
2212
Ormat Technologies
ORA
$6.54B
| $935K | ﹤0.01% |
11,165
-10,372
| -48% | -$775K |
|
2213
ChargePoint
CHPT
$156M
| $934K | ﹤0.01% |
66,373
+34,437
| +108% | +$461K |
|
2214
CEVA Inc
CEVA
$762M
| $933K | ﹤0.01% |
42,461
+17,444
| +70% | +$388K |
|
2215
Schwab 1000 Index ETF
SCHK
$5.84B
| $930K | ﹤0.01% |
+31,200
| New | +$860K |
|
|
2216
Broadcom
AVGO
$1.71T
| $928K | ﹤0.01% |
3,367
-1,556,289
| -100% | -$338M |
|
2217
State Street SPDR US Small Cap Low Volatility Index ETF
SMLV
$258M
| $926K | ﹤0.01% |
7,400
-3,000
| -29% | -$363K |
|
2218
Choiceone Financial
COFS
$495M
| $924K | ﹤0.01% |
32,199
-22,833
| -41% | -$648K |
|
|
NXRT
2219
NexPoint Residential Trust
NXRT
$626M
| $922K | ﹤0.01% |
27,677
-2,916
| -10% | -$103K |
|
2220
First Mid Bancshares
FMBH
$1.33B
| $922K | ﹤0.01% |
24,598
-10,262
| -29% | -$359K |
|
2221
Forrester Research
FORR
$229M
| $920K | ﹤0.01% |
92,966
+13,318
| +17% | +$132K |
|
|
SEE
2222
DELISTED
Sealed Air
SEE
| $918K | ﹤0.01% |
29,595
-75,015
| -72% | -$2.23M |
|
|
HES
2223
DELISTED
Hess
HES
| $914K | ﹤0.01% |
6,598
-2,506
| -28% | -$338K |
|
2224
Kingstone Companies
KINS
$287M
| $909K | ﹤0.01% |
+58,997
| New | +$979K |
|
2225
Amgen
AMGN
$240B
| $905K | ﹤0.01% |
3,243
-356,273
| -99% | -$101M |
|
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.