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 | |
|---|---|---|---|---|---|---|
|
SLDE
1276
Slide Insurance Holdings
SLDE
$2.76B
| $5.7M | 0.01% |
360,948
+348,448
| +2,788% | +$5.71M |
|
|
SVACU
1277
DELISTED
Spring Valley Acquisition Corp III Unit
SVACU
| $5.7M | 0.01% |
+554,070
| New | +$5.61M |
|
1278
FIGS
FIGS
$2.53B
| $5.69M | 0.01% |
850,760
-31,403
| -4% | -$207K |
|
1279
Orrstown Financial Services
ORRF
$828M
| $5.69M | 0.01% |
167,409
+37,263
| +29% | +$1.27M |
|
1280
Bank of N.T. Butterfield & Son
NTB
$2.3B
| $5.69M | 0.01% |
132,468
+105,110
| +384% | +$4.74M |
|
1281
Etsy
ETSY
$7.99B
| $5.68M | 0.01% |
85,566
-962,445
| -92% | -$57.5M |
|
|
DYNC
1282
Dynamix Corp
DYNC
$241M
| $5.66M | 0.01% |
543,750
| – | – |
|
1283
Mercury Systems
MRCY
$5.38B
| $5.65M | 0.01% |
73,035
-81,364
| -53% | -$5.06M |
|
1284
Aspen Aerogels
ASPN
$416M
| $5.65M | 0.01% |
811,528
+40,221
| +5% | +$284K |
|
1285
CALL
ExxonMobil
XOM
$675B
| $5.64M | 0.01% |
+50,000
| New | +$5.56M |
|
1286
Donaldson
DCI
$10.7B
| $5.64M | 0.01% |
68,863
+55,098
| +400% | +$4.15M |
|
1287
Hanover Insurance
THG
$7.92B
| $5.63M | 0.01% |
31,015
+19,347
| +166% | +$3.32M |
|
1288
BJ's Restaurants
BJRI
$1.43B
| $5.63M | 0.01% |
+184,502
| New | +$6.58M |
|
1289
CorVel
CRVL
$3.6B
| $5.63M | 0.01% |
72,745
+62,175
| +588% | +$5.55M |
|
1290
Edwards Lifesciences
EW
$52.2B
| $5.61M | 0.01% |
72,200
+17,837
| +33% | +$1.39M |
|
1291
Datadog
DDOG
$81.1B
| $5.61M | 0.01% |
39,400
-478,218
| -92% | -$65.8M |
|
|
SVCC
1292
Stellar V Capital Corp
SVCC
$230M
| $5.6M | 0.01% |
543,750
| – | – |
|
|
GTEN
1293
Gores Holdings X
GTEN
| $5.6M | 0.01% |
548,419
| – | – |
|
1294
Installed Building Products
IBP
$6.51B
| $5.6M | 0.01% |
22,700
-87,809
| -79% | -$20.9M |
|
1295
Aegon
AEG
$13.6B
| $5.59M | 0.01% |
700,126
-1,237,307
| -64% | -$9.24M |
|
1296
Texas Instruments
TXN
$236B
| $5.59M | 0.01% |
30,435
+4,835
| +19% | +$945K |
|
1297
Fulton Financial
FULT
$4.5B
| $5.59M | 0.01% |
300,072
+279,759
| +1,377% | +$5.29M |
|
1298
Merchants Bancorp
MBIN
$2.48B
| $5.59M | 0.01% |
175,754
+164,834
| +1,509% | +$5.41M |
|
1299
Century Communities
CCS
$1.97B
| $5.58M | 0.01% |
88,044
-181,570
| -67% | -$11.5M |
|
1300
AptarGroup
ATR
$8.57B
| $5.57M | 0.01% |
41,688
-29,194
| -41% | -$4.22M |
|
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.