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 | |
|---|---|---|---|---|---|---|
2226
Alico
ALCO
$306M
| $905K | ﹤0.01% |
+27,699
| New | +$840K |
|
2227
FS Bancorp
FSBW
$340M
| $905K | ﹤0.01% |
22,985
+7,366
| +47% | +$285K |
|
2228
Perion Network
PERI
$387M
| $903K | ﹤0.01% |
88,969
+26,336
| +42% | +$252K |
|
|
GRSD
2229
Grandstand Ltd
GRSD
$70.1M
| $902K | ﹤0.01% |
75,834
+49,195
| +185% | +$606K |
|
2230
Douglas Elliman
DOUG
$179M
| $897K | ﹤0.01% |
386,552
+133,010
| +52% | +$284K |
|
2231
GSI Technology
GSIT
$229M
| $897K | ﹤0.01% |
266,898
+23,779
| +10% | +$72.5K |
|
2232
Carter Bankshares
CARE
$727M
| $896K | ﹤0.01% |
51,694
-16,116
| -24% | -$255K |
|
2233
Corvus Pharmaceuticals
CRVS
$1.23B
| $896K | ﹤0.01% |
223,913
-84,437
| -27% | -$307K |
|
2234
Southern Missouri Bancorp
SMBC
$815M
| $893K | ﹤0.01% |
16,307
+2,627
| +19% | +$137K |
|
2235
Cannae Holdings
CNNE
$670M
| $892K | ﹤0.01% |
+42,768
| New | +$790K |
|
2236
Lightspeed Commerce
LSPD
$1.37B
| $890K | ﹤0.01% |
76,000
+63,923
| +529% | +$658K |
|
2237
Valens Semiconductor
VLN
$191M
| $887K | ﹤0.01% |
337,360
-7,783
| -2% | -$18K |
|
2238
Waterstone Financial
WSBF
$378M
| $886K | ﹤0.01% |
64,155
+43,615
| +212% | +$558K |
|
2239
Frontline
FRO
$9.6B
| $885K | ﹤0.01% |
53,941
+20,393
| +61% | +$346K |
|
|
BFS
2240
Saul Centers
BFS
$840M
| $884K | ﹤0.01% |
25,908
-9,259
| -26% | -$312K |
|
|
DEFT
2241
Defi Technologies
DEFT
$229M
| $883K | ﹤0.01% |
+301,225
| New | +$1.01M |
|
2242
Omega Flex
OFLX
$273M
| $880K | ﹤0.01% |
27,169
+11,384
| +72% | +$366K |
|
|
PINC
2243
DELISTED
Premier
PINC
| $879K | ﹤0.01% |
40,102
-35,098
| -47% | -$756K |
|
2244
Business First Bancshares
BFST
$1.01B
| $878K | ﹤0.01% |
35,626
+15,426
| +76% | +$363K |
|
2245
Senseonics Holdings Inc
SENS
$506M
| $877K | ﹤0.01% |
92,095
-19,947
| -18% | -$233K |
|
2246
Columbia Financial
CLBK
$1.22B
| $876K | ﹤0.01% |
60,354
+20,996
| +53% | +$299K |
|
2247
National Vision
EYE
$1.47B
| $872K | ﹤0.01% |
+37,900
| New | +$646K |
|
2248
Northern Trust US Quality Low Volatility ETF
QLV
$168M
| $872K | ﹤0.01% |
12,800
-1,700
| -12% | -$111K |
|
2249
Vishay Intertechnology
VSH
$4.78B
| $871K | ﹤0.01% |
54,822
-130,837
| -70% | -$1.82M |
|
2250
Hagerty
HGTY
$1.36B
| $867K | ﹤0.01% |
85,797
-11,306
| -12% | -$105K |
|
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.