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 | |
|---|---|---|---|---|---|---|
1726
CALL
Campbell Soup
CPB
$6.51B
| $4.28M | ﹤0.01% |
96,300
-73,300
| -43% | -$3.17M |
|
1727
CALL
Modine Manufacturing
MOD
$12.8B
| $4.27M | ﹤0.01% |
44,900
+36,300
| +422% | +$2.81M |
|
1728
PUT
Perion Network
PERI
$367M
| $4.27M | ﹤0.01% |
189,800
+174,400
| +1,132% | +$4.44M |
|
1729
CALL
TC Energy
TRP
$73.5B
| $4.26M | ﹤0.01% |
106,100
-190,300
| -64% | -$7.51M |
|
1730
CALL
Roper Technologies
ROP
$36.3B
| $4.26M | ﹤0.01% |
7,600
-32,800
| -81% | -$17.9M |
|
1731
PUT
Shift4
FOUR
$3.84B
| $4.26M | ﹤0.01% |
64,500
+37,400
| +138% | +$2.81M |
|
1732
PUT
TORM
TRMD
$3.1B
| $4.25M | ﹤0.01% |
121,700
-4,600
| -4% | -$156K |
|
1733
CALL
Golar LNG
GLNG
$4.95B
| $4.22M | ﹤0.01% |
175,500
+142,000
| +424% | +$3.16M |
|
1734
PUT
Under Armour Class C
UA
$2.92B
| $4.22M | ﹤0.01% |
572,900
+334,600
| +140% | +$2.56M |
|
1735
CALL
SBA Communications
SBAC
$18.4B
| $4.2M | ﹤0.01% |
19,400
+8,100
| +72% | +$1.8M |
|
1736
PUT
Lumentum
LITE
$59.4B
| $4.18M | ﹤0.01% |
88,300
+9,600
| +12% | +$488K |
|
1737
CALL
Pegasystems
PEGA
$4.41B
| $4.17M | ﹤0.01% |
129,200
+116,400
| +909% | +$3.27M |
|
1738
PUT
Conagra Brands
CAG
$7.07B
| $4.17M | ﹤0.01% |
140,800
+49,800
| +55% | +$1.42M |
|
1739
PUT
Incyte
INCY
$23.5B
| $4.15M | ﹤0.01% |
72,900
+44,900
| +160% | +$2.7M |
|
1740
PUT
Lemonade
LMND
$4.62B
| $4.15M | ﹤0.01% |
253,000
+52,200
| +26% | +$878K |
|
1741
CALL
Beyond Meat
BYND
$288M
| $4.14M | ﹤0.01% |
500,500
-19,200
| -4% | -$148K |
|
1742
PUT
CoStar Group
CSGP
$11.3B
| $4.14M | ﹤0.01% |
42,900
-42,200
| -50% | -$3.63M |
|
1743
PUT
Everest Group
EG
$15.2B
| $4.13M | ﹤0.01% |
10,400
-13,800
| -57% | -$5.17M |
|
1744
CALL
Polaris
PII
$4.15B
| $4.13M | ﹤0.01% |
41,300
-24,400
| -37% | -$2.24M |
|
1745
CALL
Check Point Software Technologies
CHKP
$13.3B
| $4.13M | ﹤0.01% |
25,200
-9,000
| -26% | -$1.44M |
|
1746
PUT
Baker Hughes
BKR
$56.8B
| $4.13M | ﹤0.01% |
123,200
+56,300
| +84% | +$1.74M |
|
1747
PUT
Bank OZK
OZK
$5.49B
| $4.13M | ﹤0.01% |
90,800
-24,800
| -21% | -$1.11M |
|
1748
CALL
Celanese
CE
$5.09B
| $4.12M | ﹤0.01% |
24,000
+17,800
| +287% | +$2.71M |
|
1749
PUT
Old Dominion Freight Line
ODFL
$48.5B
| $4.12M | ﹤0.01% |
18,800
-23,000
| -55% | -$4.8M |
|
1750
CALL
Exelixis
EXEL
$13.9B
| $4.12M | ﹤0.01% |
173,700
+53,200
| +44% | +$1.18M |
|
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.