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 | |
|---|---|---|---|---|---|---|
|
QVMT
2326
Invesco S&P 500 Concentrated QVM ETF
QVMT
$135M
| $739K | ﹤0.01% |
+14,200
| New | +$709K |
|
2327
NVR
NVR
$17B
| $739K | ﹤0.01% |
100
-400
| -80% | -$2.87M |
|
2328
Riley Exploration Permian
REPX
$833M
| $737K | ﹤0.01% |
28,085
-8,856
| -24% | -$234K |
|
2329
AAR Corp
AIR
$5.42B
| $736K | ﹤0.01% |
10,706
-55,769
| -84% | -$3.35M |
|
2330
Viavi Solutions
VIAV
$9.12B
| $735K | ﹤0.01% |
+73,006
| New | +$706K |
|
2331
BK Technologies
BKTI
$285M
| $735K | ﹤0.01% |
+15,589
| New | +$697K |
|
2332
Mattel
MAT
$4.23B
| $735K | ﹤0.01% |
37,251
-51,100
| -58% | -$909K |
|
2333
Post Holdings
POST
$3.73B
| $733K | ﹤0.01% |
6,725
-1,376
| -17% | -$154K |
|
2334
CuriosityStream
CURI
$169M
| $732K | ﹤0.01% |
129,964
+92,664
| +248% | +$425K |
|
|
NAK
2335
Northern Dynasty Minerals
NAK
$1B
| $731K | ﹤0.01% |
545,651
+56,247
| +11% | +$62.8K |
|
2336
Comstock Resources
CRK
$4.19B
| $731K | ﹤0.01% |
+26,418
| New | +$601K |
|
2337
UFP Industries
UFPI
$4.92B
| $729K | ﹤0.01% |
+7,333
| New | +$740K |
|
2338
State Street SPDR S&P Homebuilders ETF
XHB
$1.41B
| $729K | ﹤0.01% |
+7,391
| New | +$703K |
|
2339
MediaAlpha
MAX
$784M
| $724K | ﹤0.01% |
66,094
-69,302
| -51% | -$669K |
|
2340
Backblaze
BLZE
$963M
| $723K | ﹤0.01% |
131,517
-5,879
| -4% | -$29.9K |
|
2341
Sensata Technologies
ST
$6.11B
| $723K | ﹤0.01% |
24,000
+13,197
| +122% | +$324K |
|
2342
G-III Apparel Group
GIII
$1.43B
| $723K | ﹤0.01% |
32,258
-132,211
| -80% | -$3.33M |
|
2343
Hamilton Lane
HLNE
$4.56B
| $721K | ﹤0.01% |
+5,076
| New | +$765K |
|
2344
Invesco ESG NASDAQ 100 ETF
QQMG
$199M
| $721K | ﹤0.01% |
19,056
-5,744
| -23% | -$195K |
|
2345
Rigel Pharmaceuticals
RIGL
$843M
| $718K | ﹤0.01% |
38,342
+25,664
| +202% | +$487K |
|
2346
LifeVantage
LFVN
$86.3M
| $717K | ﹤0.01% |
54,829
+32,421
| +145% | +$419K |
|
2347
Adtran
ADTN
$628M
| $716K | ﹤0.01% |
79,864
+4,662
| +6% | +$37.2K |
|
2348
Sinclair Inc
SBGI
$1.05B
| $714K | ﹤0.01% |
51,680
-27,342
| -35% | -$389K |
|
2349
TransUnion
TRU
$16.3B
| $714K | ﹤0.01% |
8,110
-231,272
| -97% | -$19.3M |
|
2350
Cincinnati Financial
CINF
$26.3B
| $712K | ﹤0.01% |
4,782
| – | – |
|
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.