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 | |
|---|---|---|---|---|---|---|
5051
Dream Finders Homes
DFH
$1.17B
| $166K | ﹤0.01% |
3,807
-1,378
| -27% | -$48.5K |
|
|
ETWO
5052
PUT
DELISTED
E2open Parent Holdings
ETWO
| $166K | ﹤0.01% |
+37,500
| New | +$151K |
|
|
JAMF
5053
PUT
DELISTED
Jamf
JAMF
| $166K | ﹤0.01% |
+9,100
| New | +$171K |
|
5054
Microvision
MVIS
$93.2M
| $166K | ﹤0.01% |
90,672
-50,346
| -36% | -$114K |
|
5055
CALL
Regenxbio
RGNX
$620M
| $166K | ﹤0.01% |
7,900
+3,400
| +76% | +$60.5K |
|
5056
PUT
ANI Pharmaceuticals
ANIP
$1.8B
| $165K | ﹤0.01% |
2,400
+2,300
| +2,300% | +$139K |
|
|
HAPN
5057
PUT
Happen Inc
HAPN
$2.21B
| $165K | ﹤0.01% |
18,800
-46,300
| -71% | -$388K |
|
5058
PUT
Sotera Health
SHC
$5.09B
| $165K | ﹤0.01% |
13,800
-6,700
| -33% | -$99.7K |
|
|
TRUE
5059
CALL
DELISTED
TrueCar
TRUE
| $165K | ﹤0.01% |
+48,900
| New | +$169K |
|
|
TPC
5060
Tutor Perini Cor
TPC
$4.41B
| $164K | ﹤0.01% |
+11,399
| New | +$116K |
|
5061
PUT
Arlo Technologies
ARLO
$1.6B
| $163K | ﹤0.01% |
12,900
+11,900
| +1,190% | +$119K |
|
|
BDN
5062
Brandywine Realty Trust
BDN
$524M
| $163K | ﹤0.01% |
+34,145
| New | +$158K |
|
5063
CALL
First Interstate BancSystem
FIBK
$3.69B
| $163K | ﹤0.01% |
6,000
+300
| +5% | +$8.19K |
|
5064
MaxLinear
MXL
$6.06B
| $163K | ﹤0.01% |
+8,767
| New | +$175K |
|
5065
CALL
CMS Energy
CMS
$22.6B
| $162K | ﹤0.01% |
2,700
+1,200
| +80% | +$69.5K |
|
5066
Direxion Daily TSLA Bear 1X ETF
TSLS
$85.8M
| $162K | ﹤0.01% |
636
-327
| -34% | -$77.5K |
|
5067
CALL
UroGen Pharma
URGN
$1.86B
| $162K | ﹤0.01% |
10,800
+9,300
| +620% | +$152K |
|
5068
KraneShares Global Carbon Strategy ETF
KRBN
$140M
| $161K | ﹤0.01% |
5,265
+4,863
| +1,210% | +$151K |
|
|
MODV
5069
DELISTED
ModivCare
MODV
| $161K | ﹤0.01% |
+6,904
| New | +$253K |
|
5070
Star Bulk Carriers
SBLK
$3.21B
| $161K | ﹤0.01% |
6,751
+42
| +0.6% | +$952 |
|
5071
CALL
Stagwell
STGW
$2.09B
| $161K | ﹤0.01% |
+25,900
| New | +$162K |
|
5072
Stantec
STN
$8.04B
| $161K | ﹤0.01% |
1,950
-1,498
| -43% | -$123K |
|
|
CUTR
5073
CALL
DELISTED
Cutera, Inc.
CUTR
| $161K | ﹤0.01% |
109,900
+69,600
| +173% | +$181K |
|
5074
CALL
Accuray
ARAY
$32M
| $160K | ﹤0.01% |
65,100
-169,500
| -72% | -$454K |
|
5075
CALL
iShares Core Dividend ETF
DIVB
$1.69B
| $160K | ﹤0.01% |
3,600
-3,100
| -46% | -$130K |
|
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.