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 | |
|---|---|---|---|---|---|---|
1676
CALL
Raymond James Financial
RJF
$32.5B
| $4.55M | ﹤0.01% |
35,400
-8,800
| -20% | -$1.03M |
|
1677
CALL
Reliance Steel & Aluminium
RS
$20.8B
| $4.54M | ﹤0.01% |
13,600
-8,200
| -38% | -$2.5M |
|
1678
PUT
Iron Mountain
IRM
$38.2B
| $4.54M | ﹤0.01% |
56,600
+20,500
| +57% | +$1.48M |
|
1679
PUT
Weatherford International
WFRD
$6.36B
| $4.54M | ﹤0.01% |
39,300
+34,700
| +754% | +$3.52M |
|
1680
CALL
Idexx Laboratories
IDXX
$42.9B
| $4.54M | ﹤0.01% |
8,400
+4,900
| +140% | +$2.68M |
|
1681
CALL
Vanguard Dividend Appreciation ETF
VIG
$111B
| $4.53M | ﹤0.01% |
24,800
+8,300
| +50% | +$1.46M |
|
1682
PUT
H&R Block
HRB
$5.18B
| $4.51M | ﹤0.01% |
91,900
+16,200
| +21% | +$770K |
|
|
NVEI
1683
PUT
DELISTED
Nuvei Corporation Subordinate Voting Shares
NVEI
| $4.51M | ﹤0.01% |
142,700
+134,200
| +1,579% | +$3.39M |
|
1684
CALL
Cooper Companies
COO
$13.7B
| $4.5M | ﹤0.01% |
44,400
-20,000
| -31% | -$1.94M |
|
1685
PUT
Ecolab
ECL
$75.6B
| $4.5M | ﹤0.01% |
19,500
-44,900
| -70% | -$9.52M |
|
1686
CALL
Atkore
ATKR
$2.59B
| $4.49M | ﹤0.01% |
23,600
+2,900
| +14% | +$464K |
|
1687
CALL
Synaptics
SYNA
$4.41B
| $4.49M | ﹤0.01% |
46,000
+34,600
| +304% | +$3.64M |
|
1688
MasTec
MTZ
$26.7B
| $4.48M | ﹤0.01% |
48,057
-16,466
| -26% | -$1.25M |
|
1689
PUT
Brookfield Renewable
BEPC
$6.12B
| $4.48M | ﹤0.01% |
182,300
+154,300
| +551% | +$4.04M |
|
1690
CALL
Nexstar Media Group
NXST
$5.6B
| $4.48M | ﹤0.01% |
26,000
-6,700
| -20% | -$1.13M |
|
1691
PUT
The GEO Group
GEO
$4.13B
| $4.47M | ﹤0.01% |
316,700
+224,500
| +243% | +$2.67M |
|
1692
Best Buy
BBY
$18B
| $4.47M | ﹤0.01% |
+54,503
| New | +$4.15M |
|
1693
CALL
Otis Worldwide
OTIS
$27.4B
| $4.47M | ﹤0.01% |
45,000
+15,700
| +54% | +$1.45M |
|
1694
State Street
STT
$50.9B
| $4.46M | ﹤0.01% |
+57,725
| New | +$4.28M |
|
1695
Planet Fitness
PLNT
$4.23B
| $4.46M | ﹤0.01% |
71,252
+66,710
| +1,469% | +$4.46M |
|
|
ECHO
1696
CALL
EchoStar
ECHO
$25.5B
| $4.46M | ﹤0.01% |
313,100
+311,700
| +22,264% | +$4.35M |
|
1697
CALL
Xylem
XYL
$28.5B
| $4.46M | ﹤0.01% |
34,500
+14,000
| +68% | +$1.69M |
|
1698
CALL
Kimbell Royalty Partners
KRP
$1.47B
| $4.46M | ﹤0.01% |
287,200
+202,800
| +240% | +$3.08M |
|
1699
PUT
Pan American Silver
PAAS
$18.6B
| $4.46M | ﹤0.01% |
295,900
+17,800
| +6% | +$246K |
|
1700
CALL
STMicroelectronics
STM
$46B
| $4.45M | ﹤0.01% |
103,000
-18,400
| -15% | -$830K |
|
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.