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 |
Amazon
AMZN
|
+$113M |
| 2 |
SPDR Gold Trust
GLD
|
+$68.6M |
| 3 |
NVIDIA
NVDA
|
+$63.4M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$55.2M |
| 5 |
Apple
AAPL
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Netflix
NFLX
|
+$27.1M |
| 2 |
Qualcomm
QCOM
|
+$24.6M |
| 3 |
Walt Disney
DIS
|
+$21.2M |
| 4 |
Advanced Micro Devices
AMD
|
+$18.2M |
| 5 |
Snowflake
SNOW
|
+$16.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.44% |
| 2 | Consumer Discretionary | 0.32% |
| 3 | Healthcare | 0.22% |
| 4 | Financials | 0.17% |
| 5 | Communication Services | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
JMIA
5101
CALL
Jumia Technologies
JMIA
$739M
| $98K | ﹤0.01% |
37,200
+5,200
| +16% | +$18K |
|
5102
Nano X Imaging
NNOX
$67.2M
| $98K | ﹤0.01% |
15,061
-58,913
| -80% | -$606K |
|
5103
CALL
RE/MAX Holdings
RMAX
$198M
| $98K | ﹤0.01% |
7,600
+7,500
| +7,500% | +$130K |
|
5104
ARS Pharmaceuticals
SPRY
$559M
| $98K | ﹤0.01% |
+26,151
| New | +$172K |
|
5105
CALL
Anterix
ATEX
$1.82B
| $97K | ﹤0.01% |
3,100
+2,900
| +1,450% | +$91.2K |
|
5106
Collegium Pharmaceutical
COLL
$1.17B
| $97K | ﹤0.01% |
4,351
-388
| -8% | -$8.85K |
|
5107
CALL
Commercial Vehicle Group
CVGI
$147M
| $97K | ﹤0.01% |
12,600
+11,900
| +1,700% | +$112K |
|
5108
Eaton
ETN
$150B
| $97K | ﹤0.01% |
455
-22,138
| -98% | -$4.77M |
|
5109
CALL
Funko
FNKO
$338M
| $97K | ﹤0.01% |
12,800
-4,500
| -26% | -$33.5K |
|
5110
CALL
Heritage Insurance Holdings
HRTG
$907M
| $97K | ﹤0.01% |
+15,000
| New | +$73.4K |
|
5111
CALL
Hexcel
HXL
$7.78B
| $97K | ﹤0.01% |
1,500
+300
| +25% | +$21.3K |
|
5112
PUT
IAMGOLD
IAG
$8.42B
| $97K | ﹤0.01% |
45,300
+12,200
| +37% | +$30K |
|
|
KC
5113
PUT
Kingsoft Cloud Holdings
KC
$3.04B
| $97K | ﹤0.01% |
19,800
-50,700
| -72% | -$287K |
|
|
NVEI
5114
DELISTED
Nuvei Corporation Subordinate Voting Shares
NVEI
| $97K | ﹤0.01% |
6,526
+4,665
| +251% | +$108K |
|
|
HZNP
5115
PUT
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $97K | ﹤0.01% |
199,500
-128,800
| -39% | -$13.8M |
|
5116
PUT
Aviat Networks
AVNW
$271M
| $96K | ﹤0.01% |
3,100
+1,500
| +94% | +$47.4K |
|
5117
BJ's Restaurants
BJRI
$1.56B
| $96K | ﹤0.01% |
+4,107
| New | +$126K |
|
5118
PUT
United States Brent Oil Fund
BNO
$770M
| $96K | ﹤0.01% |
3,000
-6,000
| -67% | -$176K |
|
|
BORR
5119
Borr Drilling
BORR
$1.23B
| $96K | ﹤0.01% |
+13,637
| New | +$104K |
|
|
CAN
5120
CALL
Canaan Creative
CAN
$182M
| $96K | ﹤0.01% |
52,800
-7,200
| -12% | -$17K |
|
5121
PUT
Coeur Mining
CDE
$15.9B
| $96K | ﹤0.01% |
43,500
-89,300
| -67% | -$233K |
|
5122
PUT
Cemex
CX
$17.2B
| $96K | ﹤0.01% |
14,900
-5,500
| -27% | -$40.8K |
|
|
FINV
5123
CALL
FinVolution Group
FINV
$1.15B
| $96K | ﹤0.01% |
19,400
-17,800
| -48% | -$93.2K |
|
5124
PUT
Goosehead Insurance
GSHD
$2.27B
| $96K | ﹤0.01% |
+1,300
| New | +$87.2K |
|
5125
PUT
GSI Technology
GSIT
$224M
| $96K | ﹤0.01% |
35,600
+26,400
| +287% | +$103K |
|
Similar funds
Simplex Trading's Q3 2023 Portfolio in Review
As of Q3 2023, Simplex Trading held 10,417 positions worth $127B, up 4.5% from $122B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading deployed $11.9B of net new capital in Q3 2023, opening 1,399 new positions and adding to 3,690 existing holdings. Its largest new stake was Amazon: 841,102 shares worth $107M.
By sector, the portfolio is most concentrated in Technology at 0.44% of assets, up from 0.41% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Netflix, an estimated $27.1M trimmed.
- Simplex Trading's largest Q3 2023 buy was Amazon: 841,102 shares worth $107M.
- Simplex Trading added most to SPDR Gold Trust in Q3 2023, an estimated $68.6M increase.
- Simplex Trading's biggest Q3 2023 reduction was Netflix, cutting an estimated $27.1M.
- Simplex Trading fully exited Qualcomm in Q3 2023, selling an estimated $24.6M.
- Simplex Trading's ten largest holdings make up 44% of its $127B portfolio in Q3 2023.
- Simplex Trading opened 1,399 new positions and closed 1,719 in Q3 2023.
- Simplex Trading's portfolio value rose 4.5% quarter-over-quarter to $127B.
Based on Simplex Trading's 13F filing for Q3 2023, filed 1 Nov 2023.