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 | |
|---|---|---|---|---|---|---|
1276
Assurant
AIZ
$14.2B
| $4.17M | 0.01% |
+21,117
| New | +$4.15M |
|
1277
Methanex
MEOH
$4.57B
| $4.17M | 0.01% |
125,903
+86,199
| +217% | +$2.78M |
|
1278
AngloGold Ashanti
AU
$60.9B
| $4.16M | 0.01% |
91,316
-122,114
| -57% | -$5.26M |
|
1279
Concentrix
CNXC
$1.59B
| $4.16M | 0.01% |
78,725
-93,163
| -54% | -$4.92M |
|
1280
Brink's
BCO
$4.65B
| $4.16M | 0.01% |
46,556
-15,431
| -25% | -$1.34M |
|
1281
Orrstown Financial Services
ORRF
$828M
| $4.14M | 0.01% |
130,146
+8,657
| +7% | +$256K |
|
1282
Artivion
AORT
$1.31B
| $4.14M | 0.01% |
133,089
+123,749
| +1,325% | +$3.35M |
|
1283
Diamondback Energy
FANG
$57.6B
| $4.14M | 0.01% |
30,100
-234,604
| -89% | -$32.5M |
|
1284
Northwest Bancshares
NWBI
$2.25B
| $4.12M | 0.01% |
322,314
+40,148
| +14% | +$487K |
|
1285
Plug Power
PLUG
$3.03B
| $4.12M | 0.01% |
2,762,180
+2,282,280
| +476% | +$2.28M |
|
|
KLG
1286
DELISTED
WK Kellogg Co
KLG
| $4.11M | 0.01% |
258,079
-68,087
| -21% | -$1.18M |
|
1287
United States Lime & Minerals
USLM
$3.47B
| $4.11M | 0.01% |
41,161
-12,374
| -23% | -$1.21M |
|
1288
Evolent Health
EVH
$534M
| $4.1M | 0.01% |
364,112
-181,771
| -33% | -$1.67M |
|
1289
Lightbridge
LTBR
$291M
| $4.1M | 0.01% |
306,559
+274,243
| +849% | +$3.03M |
|
1290
Archer Daniels Midland
ADM
$37.7B
| $4.09M | 0.01% |
77,493
+20,130
| +35% | +$979K |
|
1291
Kayne Anderson Energy Infrastructure Fund
KYN
$2.47B
| $4.07M | 0.01% |
+320,354
| New | +$3.86M |
|
1292
Albany International
AIN
$1.66B
| $4.07M | 0.01% |
58,069
-13,754
| -19% | -$912K |
|
1293
Dropbox
DBX
$7.58B
| $4.06M | 0.01% |
141,816
-470,387
| -77% | -$13.3M |
|
|
OPTU
1294
Optimum Communications Inc
OPTU
$328M
| $4.05M | 0.01% |
1,891,802
-1,243,697
| -40% | -$2.92M |
|
|
HTBK
1295
DELISTED
Heritage Commerce
HTBK
| $4.05M | 0.01% |
407,504
+2,735
| +0.7% | +$25.1K |
|
1296
Astronics
ATRO
$3.21B
| $4.04M | 0.01% |
144,893
-145,459
| -50% | -$3.4M |
|
1297
Domino's
DPZ
$11.5B
| $4.04M | 0.01% |
8,964
-6,186
| -41% | -$2.9M |
|
|
NBIS
1298
Nebius Group N.V.
NBIS
$57.3B
| $4.04M | 0.01% |
+72,996
| New | +$2.51M |
|
1299
Insperity
NSP
$1.99B
| $4.04M | 0.01% |
67,141
+57,687
| +610% | +$4.03M |
|
1300
Schneider National
SNDR
$6.11B
| $4.03M | 0.01% |
166,980
-235,970
| -59% | -$5.48M |
|
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.