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 | |
|---|---|---|---|---|---|---|
326
Popular Inc
BPOP
$10.8B
| $39.5M | 0.07% |
358,780
+42,799
| +14% | +$4.23M |
|
327
Essential Properties Realty Trust
EPRT
$6.67B
| $39.3M | 0.07% |
1,232,781
+691,477
| +128% | +$22.1M |
|
328
Alaska Air
ALK
$4.51B
| $39.2M | 0.07% |
792,585
+680,505
| +607% | +$33.1M |
|
329
PUT
MP Materials
MP
$10.7B
| $39.1M | 0.07% |
1,175,500
+87,900
| +8% | +$2.24M |
|
330
Repligen
RGEN
$10.2B
| $38.9M | 0.07% |
313,143
+87,837
| +39% | +$11.2M |
|
331
General Motors
GM
$77.2B
| $38.9M | 0.07% |
791,475
+60,608
| +8% | +$2.87M |
|
332
Spotify
SPOT
$110B
| $38.7M | 0.07% |
50,400
-190,588
| -79% | -$122M |
|
333
Northrop Grumman
NOC
$78.3B
| $38.5M | 0.07% |
77,069
-297,178
| -79% | -$146M |
|
334
CALL
Uber
UBER
$161B
| $38.5M | 0.07% |
413,000
+84,900
| +26% | +$6.99M |
|
335
BioCryst Pharmaceuticals
BCRX
$2.44B
| $38.4M | 0.07% |
4,288,223
+2,242,688
| +110% | +$20.9M |
|
336
Graco
GGG
$13.1B
| $38.3M | 0.07% |
446,074
+69,849
| +19% | +$5.79M |
|
337
Klaviyo
KVYO
$5.22B
| $38M | 0.07% |
1,130,866
+369,782
| +49% | +$11.7M |
|
338
Insmed
INSM
$27.5B
| $37.9M | 0.07% |
376,508
-30,395
| -7% | -$2.32M |
|
339
Ally Financial
ALLY
$13.1B
| $37.7M | 0.07% |
+966,737
| New | +$33.5M |
|
340
Paycom
PAYC
$10.3B
| $37.5M | 0.07% |
161,905
+149,462
| +1,201% | +$35.4M |
|
341
Archer Aviation
ACHR
$4.85B
| $37M | 0.07% |
3,410,389
+1,744,180
| +105% | +$16.3M |
|
342
Sarepta Therapeutics
SRPT
$1.98B
| $37M | 0.07% |
2,161,697
+1,610,817
| +292% | +$68.7M |
|
343
Check Point Software Technologies
CHKP
$13.3B
| $36.6M | 0.06% |
165,450
+26,013
| +19% | +$5.72M |
|
344
CNX Resources
CNX
$5.38B
| $36.6M | 0.06% |
1,085,548
-686,326
| -39% | -$21.6M |
|
345
Shake Shack
SHAK
$3.06B
| $36.4M | 0.06% |
259,088
+124,240
| +92% | +$13.5M |
|
|
CMA
346
DELISTED
Comerica
CMA
| $36M | 0.06% |
603,788
+268,528
| +80% | +$15M |
|
347
NewMarket
NEU
$8.62B
| $36M | 0.06% |
52,127
+19,605
| +60% | +$12.2M |
|
348
State Street
STT
$51.4B
| $35.9M | 0.06% |
337,295
+108,463
| +47% | +$10M |
|
349
Clean Harbors
CLH
$16.7B
| $35.8M | 0.06% |
154,828
+26,601
| +21% | +$5.82M |
|
350
APA Corp
APA
$15.2B
| $35.6M | 0.06% |
1,948,466
-257,635
| -12% | -$4.47M |
|
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.