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 | |
|---|---|---|---|---|---|---|
1551
Hingham Institution for Saving
HIFS
$668M
| $2.69M | ﹤0.01% |
10,839
+5,668
| +110% | +$1.37M |
|
1552
iShares MSCI Mexico ETF
EWW
$1.79B
| $2.69M | ﹤0.01% |
+44,400
| New | +$2.56M |
|
1553
Unitil
UTL
$977M
| $2.69M | ﹤0.01% |
51,509
+29,699
| +136% | +$1.65M |
|
1554
PUT
Hercules Capital
HTGC
$3.28B
| $2.69M | ﹤0.01% |
146,900
+50,100
| +52% | +$887K |
|
1555
Ennis
EBF
$544M
| $2.68M | ﹤0.01% |
147,647
+27,799
| +23% | +$521K |
|
1556
Genco Shipping & Trading
GNK
$1.17B
| $2.67M | ﹤0.01% |
204,217
-50,171
| -20% | -$664K |
|
1557
Ameren
AEE
$29.7B
| $2.67M | ﹤0.01% |
27,783
+8,743
| +46% | +$849K |
|
1558
Bitdeer Technologies
BTDR
$2.97B
| $2.66M | ﹤0.01% |
+232,062
| New | +$2.68M |
|
|
AII
1559
American Integrity Insurance
AII
$512M
| $2.66M | ﹤0.01% |
+144,493
| New | +$2.44M |
|
1560
PACS Group
PACS
$7.01B
| $2.65M | ﹤0.01% |
205,225
-138,250
| -40% | -$1.44M |
|
|
P
1561
Everpure Inc
P
$33.4B
| $2.65M | ﹤0.01% |
46,000
+2,691
| +6% | +$134K |
|
1562
State Street US Sector Rotation ETF
XLSR
$1.04B
| $2.65M | ﹤0.01% |
+48,200
| New | +$2.46M |
|
1563
Coastal Financial
CCB
$718M
| $2.65M | ﹤0.01% |
27,305
+7,208
| +36% | +$621K |
|
1564
Pegasystems
PEGA
$5.64B
| $2.64M | ﹤0.01% |
48,740
-177,480
| -78% | -$8.04M |
|
1565
Southwest Airlines
LUV
$19.9B
| $2.63M | ﹤0.01% |
81,200
+3,561
| +5% | +$107K |
|
|
RFAI
1566
RF Acquisition Corp II
RFAI
$426M
| $2.63M | ﹤0.01% |
250,000
| – | – |
|
1567
PROG Holdings
PRG
$1.56B
| $2.63M | ﹤0.01% |
89,538
-24,910
| -22% | -$692K |
|
1568
Stewart Information Services
STC
$2.13B
| $2.63M | ﹤0.01% |
40,324
+37,173
| +1,180% | +$2.39M |
|
1569
Imperial Oil
IMO
$66.2B
| $2.62M | ﹤0.01% |
33,000
-20,387
| -38% | -$1.46M |
|
|
QSEA
1570
Quartzsea Acquisition Corp
QSEA
$108M
| $2.62M | ﹤0.01% |
+260,999
| New | +$2.61M |
|
1571
Larimar Therapeutics
LRMR
$421M
| $2.61M | ﹤0.01% |
903,611
+508,866
| +129% | +$1.18M |
|
1572
iShares Russell Top 200 Value ETF
IWX
$4.03B
| $2.61M | ﹤0.01% |
+31,000
| New | +$2.49M |
|
1573
Hain Celestial
HAIN
$75.8M
| $2.61M | ﹤0.01% |
1,715,649
+515,668
| +43% | +$1.2M |
|
1574
SPX Corp
SPXC
$10.1B
| $2.6M | ﹤0.01% |
15,531
-16,628
| -52% | -$2.44M |
|
1575
Pembina Pipeline
PBA
$28.3B
| $2.6M | ﹤0.01% |
69,396
-210,000
| -75% | -$7.93M |
|
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.