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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
151
CALL
Snowflake
SNOW
$92.6B
| $105M | 0.06% |
918,300
-175,500
| -16% | -$21.6M |
|
152
PUT
Chevron
CVX
$382B
| $104M | 0.06% |
709,400
-81,200
| -10% | -$12.1M |
|
153
CALL
Vertiv
VRT
$115B
| $102M | 0.06% |
1,026,500
+46,400
| +5% | +$3.85M |
|
154
PUT
ExxonMobil
XOM
$636B
| $102M | 0.06% |
1,264,000
+79,000
| +7% | +$9.12M |
|
155
PUT
Constellation Energy
CEG
$96.7B
| $101M | 0.06% |
389,000
+83,400
| +27% | +$16.6M |
|
156
PUT
Uber
UBER
$144B
| $101M | 0.06% |
1,588,600
-882,400
| -36% | -$62.1M |
|
157
CALL
ServiceNow
NOW
$99.9B
| $101M | 0.06% |
562,500
+50,500
| +10% | +$8.3M |
|
158
CALL
Philip Morris
PM
$302B
| $101M | 0.06% |
828,600
+404,800
| +96% | +$47M |
|
159
PUT
AbbVie
ABBV
$453B
| $100M | 0.06% |
508,900
+191,800
| +60% | +$35.8M |
|
160
PUT
Johnson & Johnson
JNJ
$617B
| $99.8M | 0.06% |
615,800
+70,500
| +13% | +$11.2M |
|
|
XYZ
161
CALL
Block Inc
XYZ
$46.3B
| $99.1M | 0.06% |
1,476,600
-271,700
| -16% | -$17.6M |
|
162
PUT
FedEx
FDX
$76.2B
| $98.6M | 0.06% |
360,400
-59,500
| -14% | -$17.3M |
|
163
PUT
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$251M
| $98M | 0.06% |
2,509,300
-243,700
| -9% | -$7.68M |
|
164
CALL
GE Aerospace
GE
$357B
| $97.9M | 0.06% |
594,500
-5,800
| -1% | -$983K |
|
|
165
CALL
Pfizer
PFE
$142B
| $97.5M | 0.06% |
5,090,900
+388,400
| +8% | +$11.3M |
|
166
CALL
Shopify
SHOP
$153B
| $97.5M | 0.06% |
1,216,400
-456,300
| -27% | -$31.5M |
|
167
PUT
JD.com
JD
$40.9B
| $97.2M | 0.06% |
2,430,300
+716,900
| +42% | +$19.7M |
|
168
CALL
McDonald's
MCD
$188B
| $96.9M | 0.06% |
318,100
-35,400
| -10% | -$9.76M |
|
169
PUT
Applied Materials
AMAT
$445B
| $96.4M | 0.06% |
576,500
+266,800
| +86% | +$54.7M |
|
|
170
Pinduoduo
PDD
$119B
| $95.7M | 0.06% |
710,095
+336,010
| +90% | +$41.3M |
|
171
CALL
Cisco
CSCO
$445B
| $95.7M | 0.06% |
1,798,200
-698,900
| -28% | -$34M |
|
|
NVO
172
PUT
Novo Nordisk
NVO
$215B
| $95.5M | 0.06% |
802,300
-142,700
| -15% | -$19M |
|
|
173
CALL
Chevron
CVX
$382B
| $95.2M | 0.06% |
646,100
-281,900
| -30% | -$42M |
|
174
PUT
Blackstone
BX
$150B
| $95M | 0.06% |
620,500
-237,900
| -28% | -$33M |
|
|
175
PUT
GE Aerospace
GE
$357B
| $94.9M | 0.06% |
581,300
+150,300
| +35% | +$25.5M |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.