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 | |
|---|---|---|---|---|---|---|
1076
PUT
Bilibili
BILI
$7.22B
| $10.8M | 0.01% |
965,100
+158,400
| +20% | +$1.66M |
|
1077
CALL
Schwab US Broad Market ETF
SCHB
$42.7B
| $10.8M | 0.01% |
418,500
-465,900
| -53% | -$9.02M |
|
1078
CALL
KKR & Co
KKR
$88.8B
| $10.8M | 0.01% |
107,300
-185,600
| -63% | -$17.1M |
|
1079
CALL
Array Technologies
ARRY
$812M
| $10.8M | 0.01% |
723,000
+372,500
| +106% | +$5.14M |
|
1080
CALL
Novartis
NVS
$295B
| $10.8M | 0.01% |
117,100
-14,900
| -11% | -$1.53M |
|
1081
PUT
Carrier Global
CARR
$57.1B
| $10.8M | 0.01% |
185,100
+21,700
| +13% | +$1.22M |
|
1082
PUT
United Therapeutics
UTHR
$26.5B
| $10.8M | 0.01% |
46,800
+36,800
| +368% | +$8.3M |
|
1083
CALL
Targa Resources
TRGP
$60.5B
| $10.7M | 0.01% |
95,900
+34,200
| +55% | +$3.23M |
|
1084
PUT
Corpay
CPAY
$24.2B
| $10.7M | 0.01% |
34,800
+3,300
| +10% | +$947K |
|
1085
Warner Bros
WBD
$65.4B
| $10.7M | 0.01% |
1,223,847
+66,549
| +6% | +$641K |
|
1086
Cigna
CI
$76.5B
| $10.7M | 0.01% |
29,413
+18,995
| +182% | +$6.25M |
|
1087
CALL
Lumentum
LITE
$59.2B
| $10.7M | 0.01% |
225,200
+163,800
| +267% | +$8.33M |
|
1088
PUT
Ares Management
ARES
$28.3B
| $10.6M | 0.01% |
79,900
+17,900
| +29% | +$2.29M |
|
|
FITB
1089
CALL
Fifth Third Bancorp
FITB
$52.1B
| $10.6M | 0.01% |
285,000
-53,000
| -16% | -$1.84M |
|
1090
PUT
Mondelez International
MDLZ
$77.7B
| $10.6M | 0.01% |
151,000
+54,100
| +56% | +$3.95M |
|
|
1091
CALL
Bilibili
BILI
$7.22B
| $10.6M | 0.01% |
943,600
-177,900
| -16% | -$1.86M |
|
1092
CALL
Starwood Property Trust
STWD
$6.14B
| $10.6M | 0.01% |
519,200
+264,200
| +104% | +$5.35M |
|
1093
PUT
CBRE Group
CBRE
$40.9B
| $10.6M | 0.01% |
108,500
+46,200
| +74% | +$4.15M |
|
1094
CALL
Ally Financial
ALLY
$12.9B
| $10.5M | 0.01% |
258,900
-273,100
| -51% | -$9.97M |
|
1095
PUT
Canadian Solar
CSIQ
$905M
| $10.5M | 0.01% |
531,000
+29,400
| +6% | +$633K |
|
1096
CALL
AGNC Investment
AGNC
$12.3B
| $10.5M | 0.01% |
1,058,700
+132,500
| +14% | +$1.28M |
|
1097
PUT
Public Service Enterprise Group
PEG
$39.8B
| $10.5M | 0.01% |
156,900
+38,900
| +33% | +$2.38M |
|
1098
PUT
Silicon Motion
SIMO
$9.13B
| $10.4M | 0.01% |
135,700
-72,300
| -35% | -$4.94M |
|
1099
CALL
Motorola Solutions
MSI
$69B
| $10.4M | 0.01% |
29,400
-28,900
| -50% | -$9.51M |
|
1100
CALL
Diageo
DEO
$46.3B
| $10.4M | 0.01% |
70,100
+49,000
| +232% | +$7.17M |
|
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.