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 | |
|---|---|---|---|---|---|---|
|
NSA
2926
CALL
DELISTED
National Storage Affiliates Trust
NSA
| $1.2M | ﹤0.01% |
30,600
+29,800
| +3,725% | +$1.12M |
|
2927
PUT
PureCycle Technologies
PCT
$1.18B
| $1.2M | ﹤0.01% |
192,700
-134,800
| -41% | -$628K |
|
|
PPL
2928
CALL
PPL Corp
PPL
$27B
| $1.2M | ﹤0.01% |
43,500
-29,200
| -40% | -$777K |
|
2929
CALL
Natural Resource Partners
NRP
$1.3B
| $1.2M | ﹤0.01% |
13,000
-1,900
| -13% | -$176K |
|
2930
PUT
Impinj
PI
$3.9B
| $1.19M | ﹤0.01% |
9,300
-20,700
| -69% | -$2.17M |
|
|
OPRA
2931
CALL
Opera Ltd
OPRA
$1.7B
| $1.19M | ﹤0.01% |
75,400
-27,500
| -27% | -$347K |
|
2932
BlackLine
BL
$1.82B
| $1.19M | ﹤0.01% |
18,429
-26,023
| -59% | -$1.58M |
|
|
BLD
2933
PUT
DELISTED
TopBuild
BLD
| $1.19M | ﹤0.01% |
2,700
+2,400
| +800% | +$939K |
|
2934
PUT
Jefferies Financial Group
JEF
$12.8B
| $1.19M | ﹤0.01% |
27,100
-40,300
| -60% | -$1.68M |
|
2935
CALL
Clean Harbors
CLH
$16B
| $1.19M | ﹤0.01% |
5,900
-3,300
| -36% | -$593K |
|
2936
CALL
G-III Apparel Group
GIII
$1.51B
| $1.19M | ﹤0.01% |
40,900
+40,600
| +13,533% | +$1.24M |
|
2937
PUT
Infosys
INFY
$46.8B
| $1.19M | ﹤0.01% |
66,100
-120,100
| -65% | -$2.33M |
|
2938
PUT
Virgin Galactic
SPCE
$326M
| $1.19M | ﹤0.01% |
40,045
+6,500
| +19% | +$236K |
|
2939
PUT
Jackson Financial
JXN
$8.4B
| $1.18M | ﹤0.01% |
17,900
-9,000
| -33% | -$489K |
|
2940
CALL
NNN REIT
NNN
$9.38B
| $1.18M | ﹤0.01% |
27,700
-128,200
| -82% | -$5.34M |
|
2941
CALL
Tetra Tech
TTEK
$8.32B
| $1.18M | ﹤0.01% |
32,000
+20,500
| +178% | +$710K |
|
2942
AeroVironment
AVAV
$7.83B
| $1.18M | ﹤0.01% |
7,699
+4,870
| +172% | +$650K |
|
2943
Stride
LRN
$3.87B
| $1.18M | ﹤0.01% |
+18,653
| New | +$1.12M |
|
|
LOGC
2944
CALL
DELISTED
ContextLogic
LOGC
| $1.18M | ﹤0.01% |
206,800
-453,700
| -69% | -$2.5M |
|
2945
PUT
Hims & Hers Health
HIMS
$6.88B
| $1.18M | ﹤0.01% |
76,000
+67,800
| +827% | +$764K |
|
2946
CALL
Colliers International
CIGI
$5.21B
| $1.17M | ﹤0.01% |
9,600
-15,700
| -62% | -$1.86M |
|
|
AZUL
2947
CALL
DELISTED
Azul
AZUL
| $1.17M | ﹤0.01% |
150,900
+19,000
| +14% | +$151K |
|
|
VTLE
2948
DELISTED
Vital Energy
VTLE
| $1.17M | ﹤0.01% |
22,319
+6,968
| +45% | +$323K |
|
2949
CALL
Boot Barn
BOOT
$4.67B
| $1.17M | ﹤0.01% |
12,300
+700
| +6% | +$57.9K |
|
2950
CALL
HDFC Bank
HDB
$119B
| $1.17M | ﹤0.01% |
41,800
-11,000
| -21% | -$312K |
|
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.