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 | |
|---|---|---|---|---|---|---|
426
GitLab
GTLB
$7.04B
| $32.3M | 0.05% |
715,703
+468,171
| +189% | +$21.4M |
|
427
TG Therapeutics
TGTX
$8.31B
| $32.1M | 0.05% |
889,870
+276,163
| +45% | +$9.1M |
|
428
Blackrock
BLK
$179B
| $32.1M | 0.05% |
27,522
-52,463
| -66% | -$58.6M |
|
429
DT Midstream
DTM
$12.9B
| $32M | 0.05% |
283,447
+143,481
| +103% | +$15M |
|
430
BigBear.ai
BBAI
$1.54B
| $32M | 0.05% |
4,903,920
+3,056,597
| +165% | +$19.6M |
|
431
Dow Inc
DOW
$23.4B
| $31.7M | 0.05% |
+1,382,943
| New | +$34.5M |
|
432
UiPath
PATH
$8.49B
| $31.7M | 0.05% |
2,367,751
+1,157,987
| +96% | +$13.7M |
|
433
Guidewire Software
GWRE
$15.8B
| $31.4M | 0.05% |
136,744
-133,601
| -49% | -$30.4M |
|
|
MRX
434
Marex Group Limited Ordinary Shares
MRX
$5.25B
| $31.4M | 0.05% |
934,221
-124,898
| -12% | -$4.51M |
|
435
XPO
XPO
$23.2B
| $31.4M | 0.05% |
242,634
+172,075
| +244% | +$22.3M |
|
436
Option Care Health
OPCH
$3.55B
| $31.3M | 0.05% |
1,129,217
+238,669
| +27% | +$6.91M |
|
437
Turning Point Brands
TPB
$1.67B
| $30.8M | 0.05% |
311,874
+138,825
| +80% | +$12.6M |
|
438
Logitech
LOGI
$13.8B
| $30.7M | 0.05% |
280,213
+149,820
| +115% | +$15.1M |
|
439
Ovintiv
OVV
$18.5B
| $30.7M | 0.05% |
760,924
+709,962
| +1,393% | +$29M |
|
440
Planet Labs
PL
$7.94B
| $30.7M | 0.05% |
2,362,275
+1,701,535
| +258% | +$13.1M |
|
|
AXON
441
PUT
Axon Enterprise
AXON
$51B
| $30.6M | 0.05% |
42,700
| – | – |
|
442
Polaris
PII
$3.66B
| $30.6M | 0.05% |
526,646
-222,173
| -30% | -$12M |
|
443
State Street SPDR S&P Insurance ETF
KIE
$704M
| $30.6M | 0.05% |
515,800
-242,500
| -32% | -$14.1M |
|
444
UWM Holdings
UWMC
$2.25B
| $30.4M | 0.05% |
4,988,898
+3,109,591
| +165% | +$16.3M |
|
445
Carpenter Technology
CRS
$24.4B
| $30.2M | 0.04% |
122,893
+36,565
| +42% | +$9.35M |
|
446
First American
FAF
$7.33B
| $30.1M | 0.04% |
467,823
+290,310
| +164% | +$18.3M |
|
447
Louisiana-Pacific
LPX
$5.12B
| $29.9M | 0.04% |
336,921
+116,193
| +53% | +$10.7M |
|
448
Invesco S&P 500 Quality ETF
SPHQ
$19.7B
| $29.9M | 0.04% |
408,200
-228,400
| -36% | -$16.5M |
|
449
CRA International
CRAI
$1.11B
| $29.8M | 0.04% |
142,978
+24,533
| +21% | +$4.71M |
|
450
Exponent
EXPO
$3.34B
| $29.8M | 0.04% |
+428,616
| New | +$30.6M |
|
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.