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 | |
|---|---|---|---|---|---|---|
2676
Resideo Technologies
REZI
$2.93B
| $332K | ﹤0.01% |
15,060
-3,600
| -19% | -$68.7K |
|
2677
Ring Energy
REI
$378M
| $332K | ﹤0.01% |
418,016
-42,499
| -9% | -$36K |
|
2678
Vanguard Information Technology ETF
VGT
$143B
| $332K | ﹤0.01% |
4,000
-1,352,000
| -100% | -$98.3M |
|
|
INZY
2679
DELISTED
Inozyme Pharma
INZY
| $330K | ﹤0.01% |
82,610
-5,483
| -6% | -$13.6K |
|
2680
Corteva
CTVA
$55.3B
| $329K | ﹤0.01% |
4,415
+1,107
| +33% | +$73.7K |
|
2681
Xponential Fitness
XPOF
$216M
| $329K | ﹤0.01% |
43,931
-57,825
| -57% | -$479K |
|
2682
Myomo
MYO
$55.1M
| $328K | ﹤0.01% |
+151,755
| New | +$550K |
|
2683
Ameresco
AMRC
$1.11B
| $327K | ﹤0.01% |
21,550
-62,310
| -74% | -$815K |
|
|
AMTM
2684
Amentum Holdings
AMTM
$4.9B
| $324K | ﹤0.01% |
13,729
-40,371
| -75% | -$844K |
|
2685
Nuveen Growth Opportunities ETF
NUGO
$2.42B
| $324K | ﹤0.01% |
9,000
-2,400
| -21% | -$77.6K |
|
2686
Pliant Therapeutics
PLRX
$70.6M
| $323K | ﹤0.01% |
278,158
+2,871
| +1% | +$4.06K |
|
2687
Johnson Outdoors
JOUT
$491M
| $321K | ﹤0.01% |
10,607
-24,283
| -70% | -$635K |
|
|
CMPS
2688
Compass Pathways
CMPS
$1.97B
| $321K | ﹤0.01% |
114,592
-52,659
| -31% | -$198K |
|
2689
Century Therapeutics
IPSC
$384M
| $320K | ﹤0.01% |
572,544
+486,538
| +566% | +$261K |
|
|
THRD
2690
DELISTED
Third Harmonic Bio
THRD
| $319K | ﹤0.01% |
58,829
+10,800
| +22% | +$53.9K |
|
2691
Compugen
CGEN
$245M
| $319K | ﹤0.01% |
178,946
-54,848
| -23% | -$81.3K |
|
2692
Crawford & Co Class A
CRD.A
$639M
| $318K | ﹤0.01% |
+30,054
| New | +$319K |
|
2693
TE Connectivity
TEL
$58.6B
| $318K | ﹤0.01% |
1,883
-18,888
| -91% | -$2.87M |
|
|
ARDT
2694
Ardent Health
ARDT
$1.59B
| $317K | ﹤0.01% |
23,199
+11,436
| +97% | +$154K |
|
2695
Unifirst Corp
UNF
$5.28B
| $316K | ﹤0.01% |
1,681
-3,807
| -69% | -$691K |
|
2696
Limoneira
LMNR
$254M
| $315K | ﹤0.01% |
+20,096
| New | +$318K |
|
2697
Corbus Pharmaceuticals
CRBP
$207M
| $314K | ﹤0.01% |
45,501
-75,663
| -62% | -$550K |
|
2698
DNOW Inc
DNOW
$2.8B
| $313K | ﹤0.01% |
21,131
-25,860
| -55% | -$395K |
|
2699
Adicet Bio
ACET
$83.3M
| $313K | ﹤0.01% |
32,050
+1,114
| +4% | +$11.7K |
|
|
OSG
2700
Octave Specialty Group
OSG
$204M
| $312K | ﹤0.01% |
43,923
-81,740
| -65% | -$609K |
|
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.