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 | |
|---|---|---|---|---|---|---|
|
XRN
1776
Chiron Real Estate Inc
XRN
$497M
| $1.96M | ﹤0.01% |
56,470
-7,317
| -11% | -$255K |
|
1777
Zillow
ZG
$8.34B
| $1.95M | ﹤0.01% |
28,500
-22,140
| -44% | -$1.47M |
|
1778
Revolve Group
RVLV
$1.64B
| $1.95M | ﹤0.01% |
97,307
-85,477
| -47% | -$1.73M |
|
1779
Royalty Pharma
RPRX
$27.7B
| $1.95M | ﹤0.01% |
54,102
-1,558,907
| -97% | -$51.6M |
|
1780
Heron Therapeutics
HRTX
$61.3M
| $1.95M | ﹤0.01% |
940,582
-112,399
| -11% | -$230K |
|
1781
ProShares Russell 2000 Dividend Growers ETF
SMDV
$747M
| $1.95M | ﹤0.01% |
29,900
-1,900
| -6% | -$121K |
|
1782
Navient
NAVI
$890M
| $1.94M | ﹤0.01% |
137,932
-165,272
| -55% | -$2.13M |
|
1783
PubMatic
PUBM
$748M
| $1.94M | ﹤0.01% |
+156,027
| New | +$1.64M |
|
1784
Ovintiv
OVV
$17.9B
| $1.94M | ﹤0.01% |
50,962
-263,930
| -84% | -$9.69M |
|
1785
iShares ESG Screened S&P 500 ETF
XVV
$677M
| $1.94M | ﹤0.01% |
40,600
-15,000
| -27% | -$659K |
|
1786
Citi Trends
CTRN
$567M
| $1.93M | ﹤0.01% |
57,949
+8,414
| +17% | +$214K |
|
1787
Ibotta
IBTA
$782M
| $1.93M | ﹤0.01% |
+52,725
| New | +$2.46M |
|
1788
Limbach Holdings
LMB
$498M
| $1.93M | ﹤0.01% |
+13,764
| New | +$1.56M |
|
|
CHAR
1789
Charlton Aria Acquisition Corp
CHAR
$120M
| $1.93M | ﹤0.01% |
187,500
| – | – |
|
1790
Spok Holdings
SPOK
$222M
| $1.92M | ﹤0.01% |
108,769
+44,939
| +70% | +$725K |
|
1791
ALPS O'Shares US Small-Cap Quality Dividend ETF
OUSM
$864M
| $1.92M | ﹤0.01% |
44,400
-76,971
| -63% | -$3.22M |
|
1792
WisdomTree Trust WisdomTree US SmallCap Quality Dividend Growth Fund
DGRS
$409M
| $1.92M | ﹤0.01% |
41,200
-27,300
| -40% | -$1.23M |
|
1793
FormFactor
FORM
$8.37B
| $1.92M | ﹤0.01% |
55,728
-81,879
| -60% | -$2.49M |
|
1794
Expeditors International
EXPD
$24.6B
| $1.91M | ﹤0.01% |
16,722
-204,525
| -92% | -$22.9M |
|
1795
Oil States International
OIS
$504M
| $1.91M | ﹤0.01% |
356,262
-13,041
| -4% | -$57.7K |
|
1796
Hafnia
HAFN
$4.09B
| $1.91M | ﹤0.01% |
382,059
-25,201
| -6% | -$122K |
|
|
LX
1797
LexinFintech Holdings
LX
$216M
| $1.9M | ﹤0.01% |
263,991
-219,394
| -45% | -$1.7M |
|
1798
Rayonier
RYN
$6.32B
| $1.9M | ﹤0.01% |
89,806
-204,878
| -70% | -$4.68M |
|
1799
Diebold Nixdorf
DBD
$2.29B
| $1.9M | ﹤0.01% |
34,220
+19,350
| +130% | +$907K |
|
1800
E.W. Scripps
SSP
$309M
| $1.89M | ﹤0.01% |
643,786
-189,050
| -23% | -$457K |
|
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.