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 | |
|---|---|---|---|---|---|---|
301
Vanguard Financials ETF
VFH
$13.8B
| $44M | 0.08% |
+346,000
| New | +$41.3M |
|
302
Coinbase
COIN
$49.2B
| $44M | 0.08% |
+125,623
| New | +$29.4M |
|
303
iShares US Financials ETF
IYF
$4.36B
| $44M | 0.08% |
+363,900
| New | +$41M |
|
304
Paylocity
PCTY
$8.14B
| $43.6M | 0.08% |
240,839
+230,739
| +2,285% | +$43.3M |
|
305
Global X Silver Miners ETF NEW
SIL
$5.37B
| $43.5M | 0.08% |
903,600
+871,300
| +2,698% | +$37.2M |
|
306
PUT
Marathon Digital Holdings
MARA
$4.35B
| $43.3M | 0.08% |
2,762,300
+1,172,600
| +74% | +$16.8M |
|
|
SPR
307
PUT
DELISTED
Spirit AeroSystems
SPR
| $43M | 0.08% |
1,128,000
+8,000
| +0.7% | +$287K |
|
308
Natera
NTRA
$47.9B
| $42.6M | 0.08% |
252,444
+175,999
| +230% | +$27.4M |
|
309
Fortinet
FTNT
$113B
| $42.5M | 0.08% |
401,931
-1,696,188
| -81% | -$171M |
|
310
Hormel Foods
HRL
$13.1B
| $42.5M | 0.08% |
1,403,701
+279,800
| +25% | +$8.44M |
|
311
Fidelity Nasdaq Composite Index ETF
ONEQ
$10.7B
| $42.2M | 0.07% |
527,000
-151,600
| -22% | -$10.9M |
|
312
Steris
STE
$23.2B
| $42.1M | 0.07% |
175,376
+76,061
| +77% | +$17.7M |
|
313
UL Solutions
ULS
$15.2B
| $42.1M | 0.07% |
577,927
-3,060
| -0.5% | -$200K |
|
314
Colgate-Palmolive
CL
$72.6B
| $41.9M | 0.07% |
461,300
-21,360
| -4% | -$1.95M |
|
315
Ralph Lauren
RL
$22.2B
| $41.9M | 0.07% |
152,692
-80,936
| -35% | -$20M |
|
316
TFI International
TFII
$11.6B
| $41.8M | 0.07% |
466,224
+397,462
| +578% | +$33.6M |
|
|
MRX
317
Marex Group Limited Ordinary Shares
MRX
$5.25B
| $41.8M | 0.07% |
1,059,119
+403,527
| +62% | +$16.8M |
|
318
Halliburton
HAL
$29.4B
| $40.8M | 0.07% |
2,002,550
+1,448,693
| +262% | +$30.4M |
|
319
First Majestic Silver
AG
$10.4B
| $40.7M | 0.07% |
4,923,037
-3,024,740
| -38% | -$20.3M |
|
320
Novartis
NVS
$302B
| $40.5M | 0.07% |
334,499
+254,389
| +318% | +$28.7M |
|
321
State Street SPDR S&P Metals & Mining ETF
XME
$4.63B
| $40.3M | 0.07% |
600,000
| – | – |
|
|
BA.PRA
322
Boeing Co 6.00% Series A Preferred Stock
BA.PRA
$7.63B
| $40.3M | 0.07% |
592,506
+401,058
| +209% | +$25.3M |
|
323
Bristol-Myers Squibb
BMY
$137B
| $40M | 0.07% |
864,756
+580,167
| +204% | +$28.5M |
|
324
JPMorgan Active Growth ETF
JGRO
$9.88B
| $39.8M | 0.07% |
+462,300
| New | +$35.9M |
|
|
K
325
DELISTED
Kellanova
K
| $39.6M | 0.07% |
498,554
+340,336
| +215% | +$27.8M |
|
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.