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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
151
PUT
Oracle
ORCL
$366B
| $116M | 0.07% |
923,600
-356,500
| -28% | -$40.8M |
|
152
PUT
Cisco
CSCO
$442B
| $115M | 0.07% |
2,304,100
+89,100
| +4% | +$4.45M |
|
153
CALL
Devon Energy
DVN
$50.9B
| $115M | 0.07% |
2,284,200
+1,227,600
| +116% | +$54.5M |
|
154
PUT
lululemon athletica
LULU
$13.2B
| $114M | 0.07% |
291,700
-132,300
| -31% | -$61.2M |
|
|
XYZ
155
PUT
Block Inc
XYZ
$47.8B
| $113M | 0.07% |
1,333,000
-403,900
| -23% | -$29.2M |
|
156
PUT
United Parcel Service
UPS
$98.9B
| $112M | 0.06% |
753,900
+276,400
| +58% | +$42M |
|
157
CALL
Target
TGT
$63.4B
| $112M | 0.06% |
630,900
-367,800
| -37% | -$56M |
|
158
PUT
Wells Fargo
WFC
$266B
| $110M | 0.06% |
2,197,600
-171,900
| -7% | -$8.99M |
|
159
PUT
GE Aerospace
GE
$353B
| $110M | 0.06% |
784,879
+350,965
| +81% | +$41.4M |
|
160
PUT
Morgan Stanley
MS
$340B
| $109M | 0.06% |
1,158,700
+58,100
| +5% | +$5.12M |
|
161
PUT
FedEx
FDX
$73.1B
| $108M | 0.06% |
372,600
-93,900
| -20% | -$23.5M |
|
|
NVO
162
CALL
Novo Nordisk
NVO
$218B
| $107M | 0.06% |
836,600
+185,800
| +29% | +$22.1M |
|
163
PUT
Direxion Daily Technology Bull 3x ETF
TECL
$5.6B
| $107M | 0.06% |
2,213,000
+705,300
| +47% | +$53.1M |
|
164
PUT
Walmart Inc
WMT
$878B
| $107M | 0.06% |
1,908,800
-506,500
| -21% | -$29M |
|
|
UWC
165
CALL
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $105M | 0.06% |
1,679,400
-1,900,300
| -53% | -$118M |
|
166
PUT
Freeport-McMoran
FCX
$89.9B
| $105M | 0.06% |
2,224,400
-12,200
| -0.5% | -$493K |
|
|
167
State Street Energy Select Sector SPDR ETF
XLE
$38.7B
| $104M | 0.06% |
2,211,932
+1,989,536
| +895% | +$85.5M |
|
168
PUT
IBM
IBM
$198B
| $104M | 0.06% |
741,900
+44,300
| +6% | +$8.08M |
|
169
CALL
iShares Morningstar Value ETF
ILCV
$1.3B
| $104M | 0.06% |
1,281,900
-1,512,900
| -54% | -$110M |
|
170
PUT
Carvana
CVNA
$47B
| $102M | 0.06% |
5,818,000
-8,543,500
| -59% | -$104M |
|
|
171
CALL
Pfizer
PFE
$142B
| $102M | 0.06% |
3,680,100
-753,800
| -17% | -$20.9M |
|
172
CALL
Arista Networks
ANET
$220B
| $102M | 0.06% |
1,408,400
+586,400
| +71% | +$39.6M |
|
173
CALL
AbbVie
ABBV
$452B
| $101M | 0.06% |
555,900
-567,700
| -51% | -$97.8M |
|
174
PUT
American Express
AXP
$239B
| $101M | 0.06% |
444,000
-70,100
| -14% | -$14.5M |
|
175
PUT
Marvell Technology
MRVL
$187B
| $100M | 0.06% |
1,412,900
+533,000
| +61% | +$36.5M |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.