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 |
Intuit
INTU
|
+$753M |
| 2 |
Boston Scientific
BSX
|
+$540M |
| 3 |
Dow Inc
DOW
|
+$485M |
| 4 |
Wells Fargo
WFC
|
+$457M |
| 5 |
Goldman Sachs
GS
|
+$378M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Micron Technology
MU
|
+$1.32B |
| 2 |
NVIDIA
NVDA
|
+$1.02B |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$787M |
| 4 |
SNDK
Sandisk
SNDK
|
+$744M |
| 5 |
Dell
DELL
|
+$688M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 19.71% |
| 2 | Financials | 15.22% |
| 3 | Healthcare | 11.94% |
| 4 | Industrials | 11.55% |
| 5 | Consumer Discretionary | 9.6% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1276
Community Bank
CBU
$3.32B
| $12.9M | 0.01% |
191,639
+95,274
| +99% | +$6.03M |
|
1277
Indivior Pharmaceuticals
INDV
$4.27B
| $12.8M | 0.01% |
312,005
+136,238
| +78% | +$4.94M |
|
1278
MongoDB
MDB
$32.4B
| $12.8M | 0.01% |
38,111
-249,051
| -87% | -$74.7M |
|
1279
Bank of N.T. Butterfield & Son
NTB
$2.3B
| $12.7M | 0.01% |
214,035
-24,277
| -10% | -$1.37M |
|
1280
PUT
Seagate
STX
$180B
| $12.6M | 0.01% |
13,100
-11,100
| -46% | -$8.47M |
|
1281
Vodafone
VOD
$36.9B
| $12.6M | 0.01% |
952,406
+21,326
| +2% | +$323K |
|
1282
Safety Insurance
SAFT
$1.52B
| $12.6M | 0.01% |
168,243
+86,591
| +106% | +$6.32M |
|
1283
Apogee Therapeutics
APGE
$10.2B
| $12.6M | 0.01% |
94,759
-186,627
| -66% | -$16.8M |
|
1284
Enact Holdings
ACT
$6.84B
| $12.6M | 0.01% |
275,029
-229,470
| -45% | -$9.81M |
|
1285
Pathward Financial
CASH
$1.72B
| $12.6M | 0.01% |
144,359
-125,602
| -47% | -$10.9M |
|
1286
iShares Russell 1000 ETF
IWB
$48.8B
| $12.6M | 0.01% |
30,680
-91,440
| -75% | -$36.2M |
|
1287
Upwork
UPWK
$1.07B
| $12.5M | 0.01% |
1,499,477
+733,168
| +96% | +$6.94M |
|
1288
SAP
SAP
$252B
| $12.5M | 0.01% |
81,258
-364,178
| -82% | -$62.1M |
|
1289
Robinhood
HOOD
$93.2B
| $12.5M | 0.01% |
124,728
-2,678,711
| -96% | -$224M |
|
1290
Nordic American Tanker
NAT
$1.48B
| $12.5M | 0.01% |
2,253,959
+1,648,843
| +272% | +$9.34M |
|
1291
CALL
Valero Energy
VLO
$99.6B
| $12.5M | 0.01% |
47,900
+37,200
| +348% | +$9.16M |
|
1292
Whirlpool
WHR
$2.62B
| $12.5M | 0.01% |
316,422
+299,874
| +1,812% | +$14M |
|
1293
Invesco NASDAQ 100 ETF
QQQM
$103B
| $12.5M | 0.01% |
41,100
-345,600
| -89% | -$97.9M |
|
1294
Ichor Holdings
ICHR
$2.13B
| $12.4M | 0.01% |
110,850
-239,067
| -68% | -$17.2M |
|
|
BOW
1295
Bowhead Specialty Holdings
BOW
$1.11B
| $12.4M | 0.01% |
415,153
-103,571
| -20% | -$2.69M |
|
1296
Sportradar
SRAD
$3.88B
| $12.4M | 0.01% |
829,886
+798,086
| +2,510% | +$11.6M |
|
|
MAIR
1297
Madison Air Solutions
MAIR
$12.5B
| $12.4M | 0.01% |
+318,481
| New | +$12.4M |
|
1298
Estee Lauder
EL
$37.7B
| $12.4M | 0.01% |
156,896
-214,793
| -58% | -$17.3M |
|
1299
Prothena Corp
PRTA
$482M
| $12.4M | 0.01% |
1,264,987
+59,009
| +5% | +$583K |
|
1300
Alignment Healthcare
ALHC
$2.79B
| $12.4M | 0.01% |
519,493
+54,366
| +12% | +$1.04M |
|
Similar funds
John Overdeck's Q2 2026 Portfolio in Review
As of Q2 2026, John Overdeck held 5,589 positions worth $138B, up 11% from $124B the previous quarter. Its ten largest holdings account for 8.3% of the portfolio.
John Overdeck withdrew a net $4.38B in Q2 2026, closing 572 positions and reducing 1,756 holdings. Its most notable exit was State Street Technology Select Sector SPDR ETF, an estimated $172M position sold in full.
By sector, the portfolio is most concentrated in Technology at 20% of assets, up from 19% a quarter earlier, followed by Financials and Healthcare.
Against the trend, John Overdeck opened a new position in Intuit worth $564M.
- John Overdeck's largest Q2 2026 buy was Intuit: 2,161,507 shares worth $564M.
- John Overdeck added most to Boston Scientific in Q2 2026, an estimated $540M increase.
- John Overdeck's biggest Q2 2026 reduction was Micron Technology, cutting an estimated $1.32B.
- John Overdeck fully exited State Street Technology Select Sector SPDR ETF in Q2 2026, selling an estimated $172M.
- John Overdeck's ten largest holdings make up 8.3% of its $138B portfolio in Q2 2026.
- John Overdeck opened 1,050 new positions and closed 572 in Q2 2026.
- John Overdeck's portfolio value rose 11% quarter-over-quarter to $138B.
Based on Two Sigma Investments's 13F filing for Q2 2026, filed 14 Aug 2026.