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 | |
|---|---|---|---|---|---|---|
726
CALL
Waste Management
WM
$95.3B
| $19.2M | 0.01% |
89,900
+14,200
| +19% | +$2.79M |
|
727
CALL
Bunge Global
BG
$23.7B
| $19.2M | 0.01% |
186,900
+101,500
| +119% | +$9.5M |
|
728
PUT
Riot Platforms
RIOT
$9.02B
| $19.1M | 0.01% |
1,556,900
-433,300
| -22% | -$5.64M |
|
729
PUT
Honeywell
HON
$78B
| $19M | 0.01% |
98,355
-126,895
| -56% | -$23.9M |
|
730
PUT
FTAI Aviation
FTAI
$22.2B
| $19M | 0.01% |
282,700
+243,700
| +625% | +$13.4M |
|
731
CALL
Entegris
ENTG
$20.6B
| $19M | 0.01% |
135,200
+54,300
| +67% | +$6.94M |
|
732
CALL
Tower Semiconductor
TSEM
$29.4B
| $19M | 0.01% |
567,800
+48,900
| +9% | +$1.52M |
|
733
CALL
CF Industries
CF
$19.5B
| $19M | 0.01% |
228,200
-32,000
| -12% | -$2.55M |
|
734
PUT
Fidelity National Information Services
FIS
$20.7B
| $18.9M | 0.01% |
255,400
-52,600
| -17% | -$3.42M |
|
735
PUT
Toll Brothers
TOL
$13.7B
| $18.9M | 0.01% |
146,300
-80,500
| -35% | -$8.76M |
|
|
CYBR
736
CALL
DELISTED
CyberArk
CYBR
| $18.9M | 0.01% |
71,100
+51,500
| +263% | +$12.8M |
|
|
X
737
PUT
DELISTED
US Steel
X
| $18.8M | 0.01% |
461,600
-1,168,000
| -72% | -$53.4M |
|
738
PUT
Toyota
TM
$209B
| $18.8M | 0.01% |
74,700
-16,400
| -18% | -$3.63M |
|
739
PUT
Wolfspeed
WOLF
$1.35B
| $18.8M | 0.01% |
636,900
+262,600
| +70% | +$7.92M |
|
740
PUT
Realty Income
O
$60.4B
| $18.8M | 0.01% |
346,800
+135,100
| +64% | +$7.32M |
|
741
PUT
Tidewater
TDW
$3.85B
| $18.7M | 0.01% |
203,600
+184,800
| +983% | +$13.8M |
|
742
PUT
Sylvamo
SLVM
$1.49B
| $18.6M | 0.01% |
301,200
+296,300
| +6,047% | +$15.8M |
|
743
CALL
Maplebear
CART
$10B
| $18.6M | 0.01% |
498,500
+125,300
| +34% | +$3.67M |
|
|
PARA
744
PUT
DELISTED
Paramount Global Class B
PARA
| $18.6M | 0.01% |
1,576,200
+38,000
| +2% | +$478K |
|
745
CALL
Dominion Energy
D
$62.8B
| $18.5M | 0.01% |
376,200
-346,000
| -48% | -$16.2M |
|
746
CALL
Constellation Energy
CEG
$98.4B
| $18.4M | 0.01% |
99,800
+44,700
| +81% | +$6.35M |
|
747
CALL
Alcoa
AA
$11.9B
| $18.4M | 0.01% |
545,800
-298,000
| -35% | -$8.72M |
|
748
CALL
Kinder Morgan
KMI
$72.9B
| $18.4M | 0.01% |
1,004,100
+140,700
| +16% | +$2.46M |
|
749
CALL
Alpha Metallurgical Resources
AMR
$1.82B
| $18.4M | 0.01% |
55,600
-27,200
| -33% | -$9.98M |
|
750
CALL
Toronto Dominion Bank
TD
$197B
| $18.3M | 0.01% |
303,700
-43,400
| -13% | -$2.62M |
|
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.