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 | |
|---|---|---|---|---|---|---|
126
PUT
Visa
V
$677B
| $135M | 0.08% |
485,000
-62,500
| -11% | -$17.3M |
|
127
PUT
ServiceNow
NOW
$105B
| $134M | 0.08% |
882,000
-161,500
| -15% | -$24.5M |
|
|
NVO
128
PUT
Novo Nordisk
NVO
$218B
| $132M | 0.08% |
1,027,700
+181,300
| +21% | +$21.6M |
|
129
PUT
Target
TGT
$63.4B
| $132M | 0.08% |
743,600
+106,800
| +17% | +$16.2M |
|
130
CALL
Occidental Petroleum
OXY
$56.2B
| $131M | 0.08% |
2,010,700
-382,000
| -16% | -$22.8M |
|
131
PUT
Intuitive Surgical
ISRG
$124B
| $130M | 0.08% |
325,500
+1,600
| +0.5% | +$605K |
|
132
PUT
Palantir
PLTR
$318B
| $130M | 0.08% |
5,644,700
+704,700
| +14% | +$15M |
|
133
CALL
CrowdStrike
CRWD
$195B
| $130M | 0.07% |
1,616,800
-169,600
| -9% | -$13M |
|
134
CALL
United Parcel Service
UPS
$96.2B
| $129M | 0.07% |
869,500
+86,400
| +11% | +$13.1M |
|
135
PUT
Spotify
SPOT
$101B
| $129M | 0.07% |
488,500
+94,300
| +24% | +$22.1M |
|
|
136
Pfizer
PFE
$142B
| $128M | 0.07% |
4,605,985
+3,225,864
| +234% | +$89.5M |
|
137
PUT
RTX Corp
RTX
$262B
| $127M | 0.07% |
1,298,600
+16,500
| +1% | +$1.49M |
|
138
CALL
Airbnb
ABNB
$86B
| $127M | 0.07% |
767,500
-235,000
| -23% | -$35.6M |
|
139
PUT
State Street SPDR Portfolio Short Term Treasury ETF
SPTS
$6.07B
| $126M | 0.07% |
836,800
-223,400
| -21% | -$6.47M |
|
140
PUT
Shopify
SHOP
$160B
| $126M | 0.07% |
1,630,300
-302,900
| -16% | -$23.9M |
|
141
PUT
UnitedHealth
UNH
$396B
| $126M | 0.07% |
254,300
-123,000
| -33% | -$62.5M |
|
142
CALL
Freeport-McMoran
FCX
$89.9B
| $124M | 0.07% |
2,633,900
-907,600
| -26% | -$36.6M |
|
143
PUT
Snowflake
SNOW
$94.2B
| $123M | 0.07% |
759,400
+41,300
| +6% | +$8.01M |
|
144
CALL
Booking.com
BKNG
$139B
| $121M | 0.07% |
835,000
-10,000
| -1% | -$1.43M |
|
145
CALL
GE Aerospace
GE
$354B
| $121M | 0.07% |
862,440
+379,659
| +79% | +$44.7M |
|
|
UWC
146
PUT
DELISTED
PROSHARES TR ULTRA RUSSELL3000
UWC
| $121M | 0.07% |
1,930,800
-170,100
| -8% | -$10.6M |
|
147
PUT
Dick's Sporting Goods
DKS
$18.7B
| $120M | 0.07% |
534,900
+151,200
| +39% | +$25.8M |
|
148
CALL
DraftKings
DKNG
$11.8B
| $118M | 0.07% |
2,607,900
-158,000
| -6% | -$6.43M |
|
|
KFYP
149
CALL
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $118M | 0.07% |
4,481,300
+363,300
| +9% | +$9.54M |
|
150
CALL
Mastercard
MA
$484B
| $117M | 0.07% |
242,100
-85,600
| -26% | -$39.1M |
|
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.