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 | |
|---|---|---|---|---|---|---|
4101
Loews
L
$24.5B
| $387K | ﹤0.01% |
4,952
-1,179
| -19% | -$87.2K |
|
4102
RPC Inc
RES
$1.13B
| $387K | ﹤0.01% |
50,088
+26,115
| +109% | +$189K |
|
4103
CALL
Valvoline
VVV
$5.06B
| $387K | ﹤0.01% |
8,700
-2,100
| -19% | -$83.7K |
|
4104
CALL
Huron Consulting
HURN
$2.76B
| $386K | ﹤0.01% |
4,000
-19,200
| -83% | -$1.95M |
|
4105
Principal Financial Group
PFG
$24.3B
| $386K | ﹤0.01% |
+4,477
| New | +$359K |
|
4106
PUT
Weibo
WB
$1.97B
| $386K | ﹤0.01% |
42,500
-278,300
| -87% | -$2.52M |
|
|
PXD
4107
DELISTED
Pioneer Natural Resource Co.
PXD
| $386K | ﹤0.01% |
1,472
-4,168
| -74% | -$977K |
|
4108
PUT
Alkami Technology
ALKT
$1.96B
| $385K | ﹤0.01% |
15,700
+12,600
| +406% | +$309K |
|
4109
AGCO
AGCO
$8.41B
| $384K | ﹤0.01% |
3,123
-5,032
| -62% | -$586K |
|
4110
CALL
Novanta
NOVT
$4.91B
| $384K | ﹤0.01% |
2,200
+1,800
| +450% | +$295K |
|
|
NARI
4111
DELISTED
Inari Medical, Inc. Common Stock
NARI
| $384K | ﹤0.01% |
+8,019
| New | +$428K |
|
4112
CALL
Arvinas
ARVN
$530M
| $383K | ﹤0.01% |
9,300
+900
| +11% | +$39.3K |
|
4113
CALL
Medifast
MED
$107M
| $383K | ﹤0.01% |
10,000
+2,800
| +39% | +$136K |
|
4114
Ollie's Bargain Outlet
OLLI
$4.31B
| $383K | ﹤0.01% |
+4,821
| New | +$364K |
|
4115
CALL
Safe Bulkers
SB
$772M
| $383K | ﹤0.01% |
77,300
-26,600
| -26% | -$117K |
|
4116
PUT
Warner Music
WMG
$15.2B
| $383K | ﹤0.01% |
11,600
-10,500
| -48% | -$367K |
|
|
AZPN
4117
CALL
DELISTED
Aspen Technology Inc
AZPN
| $383K | ﹤0.01% |
+1,800
| New | +$355K |
|
4118
PUT
Applied Digital
APLD
$6.68B
| $382K | ﹤0.01% |
89,300
-302,900
| -77% | -$1.53M |
|
4119
CALL
National Grid
NGG
$79.3B
| $382K | ﹤0.01% |
5,943
-18,783
| -76% | -$1.19M |
|
4120
CALL
Achieve Life Sciences
ACHV
$633M
| $381K | ﹤0.01% |
84,000
+83,700
| +27,900% | +$372K |
|
4121
CALL
Clover Health Investments
CLOV
$2.23B
| $381K | ﹤0.01% |
479,900
-220,900
| -32% | -$201K |
|
4122
PUT
Hain Celestial
HAIN
$44.6M
| $381K | ﹤0.01% |
48,600
+45,900
| +1,700% | +$452K |
|
4123
CALL
LCI Industries
LCII
$2.59B
| $381K | ﹤0.01% |
3,100
-15,400
| -83% | -$1.81M |
|
4124
CALL
California Resources
CRC
$4.49B
| $380K | ﹤0.01% |
6,900
-37,100
| -84% | -$1.94M |
|
|
HPP
4125
PUT
Hudson Pacific Properties
HPP
$758M
| $380K | ﹤0.01% |
8,429
+5,100
| +153% | +$269K |
|
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.