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 | |
|---|---|---|---|---|---|---|
1626
CALL
Plains All American Pipeline
PAA
$17.4B
| $3.37M | ﹤0.01% |
219,700
-307,100
| -58% | -$4.6M |
|
1627
CALL
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $3.36M | ﹤0.01% |
54,000
+20,900
| +63% | +$1.34M |
|
1628
Carnival Corporation Ltd
CCL
$36.1B
| $3.34M | ﹤0.01% |
+243,620
| New | +$4.04M |
|
|
IMGN
1629
DELISTED
Immunogen Inc
IMGN
| $3.34M | ﹤0.01% |
210,500
-95,478
| -31% | -$1.59M |
|
1630
CALL
Icahn Enterprises
IEP
$5.17B
| $3.33M | ﹤0.01% |
168,500
+41,500
| +33% | +$1.05M |
|
1631
CALL
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $3.33M | ﹤0.01% |
34,100
-11,000
| -24% | -$1.11M |
|
1632
CALL
Broadridge
BR
$17.2B
| $3.33M | ﹤0.01% |
18,600
+17,500
| +1,591% | +$3.1M |
|
1633
PUT
Eagle Materials
EXP
$6.6B
| $3.33M | ﹤0.01% |
20,000
+15,600
| +355% | +$2.83M |
|
1634
CALL
Hertz
HTZ
$572M
| $3.32M | ﹤0.01% |
271,300
-68,700
| -20% | -$1.15M |
|
1635
CALL
ArcelorMittal
MT
$50.4B
| $3.32M | ﹤0.01% |
132,700
+64,200
| +94% | +$1.71M |
|
1636
PUT
Universal Display
OLED
$3.71B
| $3.31M | ﹤0.01% |
21,100
-19,600
| -48% | -$2.98M |
|
1637
CALL
First Majestic Silver
AG
$8.05B
| $3.3M | ﹤0.01% |
643,700
+220,700
| +52% | +$1.31M |
|
1638
CALL
Organon & Co
OGN
$3.55B
| $3.3M | ﹤0.01% |
190,200
+32,100
| +20% | +$669K |
|
1639
PUT
2x Long VIX Futures ETF
UVIX
$286M
| $3.3M | ﹤0.01% |
128
+57
| +80% | +$432K |
|
|
FL
1640
DELISTED
Foot Locker
FL
| $3.29M | ﹤0.01% |
189,927
+167,345
| +741% | +$3.74M |
|
|
ETRN
1641
PUT
DELISTED
Equitrans Midstream Corporation Common Stock
ETRN
| $3.29M | ﹤0.01% |
351,700
-52,600
| -13% | -$502K |
|
|
WBA
1642
DELISTED
Walgreens Boots Alliance
WBA
| $3.28M | ﹤0.01% |
147,659
-73,279
| -33% | -$1.95M |
|
1643
Crinetics Pharmaceuticals
CRNX
$8.86B
| $3.28M | ﹤0.01% |
110,376
+107,831
| +4,237% | +$2.22M |
|
1644
CALL
Otis Worldwide
OTIS
$27.4B
| $3.28M | ﹤0.01% |
40,800
+23,900
| +141% | +$2.04M |
|
|
BBBY
1645
CALL
Bed Bath & Beyond
BBBY
$473M
| $3.27M | ﹤0.01% |
227,590
-190,960
| -46% | -$4.67M |
|
1646
PUT
ING
ING
$93.8B
| $3.27M | ﹤0.01% |
248,200
+17,900
| +8% | +$252K |
|
1647
PUT
Hormel Foods
HRL
$13.9B
| $3.27M | ﹤0.01% |
86,000
+59,500
| +225% | +$2.34M |
|
1648
CALL
J.M. Smucker
SJM
$12.6B
| $3.27M | ﹤0.01% |
26,600
+12,300
| +86% | +$1.75M |
|
1649
APA Corp
APA
$12.8B
| $3.26M | ﹤0.01% |
+79,279
| New | +$3.26M |
|
1650
CALL
TETRA Technologies
TTI
$1.23B
| $3.26M | ﹤0.01% |
510,800
+473,000
| +1,251% | +$2.44M |
|
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.