Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3626
CALL
nVent Electric
NVT
$22.8B
| $520K | ﹤0.01% |
6,800
-7,900
| -54% | -$613K |
|
3627
State Street SPDR Portfolio Mortgage Backed Bond ETF
SPMB
$7.01B
| $520K | ﹤0.01% |
24,109
+10,389
| +76% | +$222K |
|
3628
PUT
Denison Mines
DNN
$2.51B
| $519K | ﹤0.01% |
261,200
+118,000
| +82% | +$250K |
|
3629
Direxion Daily Regional Banks Bull 3X ETF
DPST
$473M
| $518K | ﹤0.01% |
7,387
+4,076
| +123% | +$278K |
|
3630
PUT
Robert Half
RHI
$4.2B
| $518K | ﹤0.01% |
8,100
+5,500
| +212% | +$377K |
|
3631
CALL
Vanguard S&P 500 Growth ETF
VOOG
$25.2B
| $518K | ﹤0.01% |
10,200
-6,600
| -39% | -$342K |
|
3632
PUT
CRH
CRH
$68.9B
| $517K | ﹤0.01% |
6,900
-4,900
| -42% | -$391K |
|
3633
PUT
Assured Guaranty
AGO
$3.75B
| $516K | ﹤0.01% |
6,700
-14,800
| -69% | -$1.16M |
|
3634
CALL
Element Solutions
ESI
$8.73B
| $515K | ﹤0.01% |
19,000
+18,900
| +18,900% | +$465K |
|
|
INFN
3635
CALL
DELISTED
Infinera Corporation Common Stock
INFN
| $515K | ﹤0.01% |
84,700
-76,300
| -47% | -$404K |
|
3636
PUT
CDW
CDW
$18.2B
| $514K | ﹤0.01% |
2,300
+700
| +44% | +$162K |
|
3637
PUT
Krystal Biotech
KRYS
$10.6B
| $514K | ﹤0.01% |
2,800
-10,600
| -79% | -$1.78M |
|
3638
Direxion Daily Financial Bear 3x ETF
FAZ
$82.6M
| $513K | ﹤0.01% |
4,829
+3,401
| +238% | +$363K |
|
3639
CALL
Dorman Products
DORM
$4.22B
| $512K | ﹤0.01% |
5,600
+1,200
| +27% | +$110K |
|
3640
PUT
Amdocs
DOX
$5.9B
| $512K | ﹤0.01% |
6,500
+4,600
| +242% | +$378K |
|
3641
PUT
Extra Space Storage
EXR
$32.2B
| $512K | ﹤0.01% |
3,300
-14,300
| -81% | -$2.08M |
|
3642
Urban Outfitters
URBN
$6.4B
| $512K | ﹤0.01% |
12,489
-17,502
| -58% | -$719K |
|
3643
CALL
Immunocore
IMCR
$1.7B
| $511K | ﹤0.01% |
15,100
-600
| -4% | -$30.6K |
|
3644
PUT
Dine Brands
DIN
$452M
| $510K | ﹤0.01% |
14,100
+7,800
| +124% | +$324K |
|
3645
CALL
Liberty Energy
LBRT
$2.74B
| $509K | ﹤0.01% |
24,400
+6,500
| +36% | +$145K |
|
3646
CALL
LivaNova
LIVN
$4.48B
| $509K | ﹤0.01% |
9,300
-3,200
| -26% | -$182K |
|
3647
CALL
SELLAS Life Sciences
SLS
$1.87B
| $509K | ﹤0.01% |
428,200
-4,800
| -1% | -$6.53K |
|
3648
CALL
TMC The Metals Company
TMC
$1.56B
| $508K | ﹤0.01% |
376,800
+102,400
| +37% | +$157K |
|
3649
PUT
Telus
TU
$16.7B
| $508K | ﹤0.01% |
33,600
+19,700
| +142% | +$317K |
|
3650
CALL
A.O. Smith
AOS
$8.81B
| $507K | ﹤0.01% |
6,200
-25,500
| -80% | -$2.16M |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.