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 | |
|---|---|---|---|---|---|---|
201
PUT
Texas Instruments
TXN
$267B
| $79M | 0.05% |
406,200
-69,300
| -15% | -$12.8M |
|
202
PUT
Autodesk
ADSK
$42.8B
| $79M | 0.05% |
319,200
+190,500
| +148% | +$42.8M |
|
203
PUT
Moderna
MRNA
$23.1B
| $79M | 0.05% |
664,900
+23,200
| +4% | +$2.94M |
|
204
PUT
American Airlines Group
AAL
$9.84B
| $78.8M | 0.05% |
6,953,600
+1,275,200
| +22% | +$16.8M |
|
205
CALL
Western Digital
WDC
$192B
| $78.6M | 0.05% |
1,373,009
+275,448
| +25% | +$15.3M |
|
206
CALL
PepsiCo
PEP
$185B
| $78.1M | 0.05% |
473,700
-34,700
| -7% | -$5.99M |
|
207
CALL
Arista Networks
ANET
$221B
| $78M | 0.05% |
890,000
-518,400
| -37% | -$38.5M |
|
208
CALL
Workday
WDAY
$32.9B
| $77.8M | 0.05% |
364,900
+207,400
| +132% | +$49.9M |
|
209
CALL
Johnson & Johnson
JNJ
$612B
| $77.2M | 0.05% |
528,500
-84,700
| -14% | -$12.6M |
|
|
210
Citigroup
C
$223B
| $77M | 0.05% |
+1,213,247
| New | +$74.8M |
|
211
CALL
ARK Space & Defense Innovation ETF
ARKX
$819M
| $76.4M | 0.05% |
2,050,300
+562,300
| +38% | +$8.39M |
|
212
CALL
Coca-Cola
KO
$355B
| $76.1M | 0.05% |
1,196,300
+41,800
| +4% | +$2.59M |
|
|
213
PUT
Workday
WDAY
$32.9B
| $76M | 0.05% |
355,100
+229,400
| +182% | +$55.2M |
|
214
CALL
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$255M
| $75.3M | 0.05% |
2,543,800
-994,800
| -28% | -$38.5M |
|
215
PUT
Procter & Gamble
PG
$348B
| $75.3M | 0.05% |
456,600
-16,000
| -3% | -$2.62M |
|
216
CALL
Roblox
RBLX
$35.7B
| $74.7M | 0.05% |
2,008,500
+643,700
| +47% | +$22.9M |
|
217
CALL
ASML
ASML
$693B
| $74.7M | 0.05% |
73,000
-193,200
| -73% | -$186M |
|
218
PUT
Newmont
NEM
$102B
| $74.6M | 0.05% |
1,782,500
-176,000
| -9% | -$7.2M |
|
219
PUT
IBM
IBM
$193B
| $73.2M | 0.05% |
498,200
-243,700
| -33% | -$42.3M |
|
220
PUT
Applied Materials
AMAT
$445B
| $73.1M | 0.05% |
309,700
-385,000
| -55% | -$82.7M |
|
221
CALL
Baidu
BIDU
$36.7B
| $72.6M | 0.04% |
839,100
+200,000
| +31% | +$20.1M |
|
222
CALL
United Parcel Service
UPS
$98.8B
| $71.9M | 0.04% |
525,100
-344,400
| -40% | -$49.3M |
|
223
PUT
CVS Health
CVS
$139B
| $71.8M | 0.04% |
1,216,300
+29,300
| +2% | +$1.83M |
|
224
CALL
Rivian
RIVN
$24.8B
| $71.6M | 0.04% |
5,333,500
+2,033,500
| +62% | +$21.2M |
|
225
PUT
Lockheed Martin
LMT
$118B
| $71.6M | 0.04% |
153,200
+26,300
| +21% | +$12.2M |
|
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.