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 | |
|---|---|---|---|---|---|---|
4001
CALL
US Physical Therapy
USPH
$1.21B
| $428K | ﹤0.01% |
+3,800
| New | +$379K |
|
4002
PUT
FerroAtlántica
GSM
$589M
| $426K | ﹤0.01% |
85,700
-73,300
| -46% | -$378K |
|
|
BAND
4003
PUT
Bandwidth Inc
BAND
$1.19B
| $425K | ﹤0.01% |
23,300
+21,000
| +913% | +$331K |
|
4004
PUT
QuinStreet
QNST
$927M
| $425K | ﹤0.01% |
24,100
+22,200
| +1,168% | +$316K |
|
|
HIBB
4005
DELISTED
Hibbett, Inc. Common Stock
HIBB
| $425K | ﹤0.01% |
5,537
-1,828
| -25% | -$131K |
|
4006
CALL
Dorman Products
DORM
$4.24B
| $424K | ﹤0.01% |
4,400
-1,400
| -24% | -$121K |
|
4007
PUT
AMC Global Media
AMCX
$451M
| $423K | ﹤0.01% |
34,900
+14,400
| +70% | +$218K |
|
4008
PUT
Inovio Pharmaceuticals
INO
$84.7M
| $423K | ﹤0.01% |
30,500
+29,708
| +3,751% | +$256K |
|
4009
VirTra
VTSI
$33.2M
| $423K | ﹤0.01% |
41,244
+14,477
| +54% | +$155K |
|
|
SUM
4010
CALL
DELISTED
Summit Materials, Inc. Class A Common Stock
SUM
| $423K | ﹤0.01% |
9,500
-1,400
| -13% | -$55.4K |
|
|
VZIO
4011
PUT
DELISTED
VIZIO Holding Corp.
VZIO
| $423K | ﹤0.01% |
38,700
+37,000
| +2,176% | +$339K |
|
4012
PUT
Clearfield
CLFD
$400M
| $422K | ﹤0.01% |
13,700
+8,600
| +169% | +$246K |
|
4013
CALL
OrthoPediatrics
KIDS
$513M
| $422K | ﹤0.01% |
+14,500
| New | +$405K |
|
4014
CALL
Opko Health
OPK
$1.04B
| $422K | ﹤0.01% |
352,200
-191,600
| -35% | -$192K |
|
4015
Perimeter Solutions
PRM
$5.67B
| $421K | ﹤0.01% |
56,814
+31,774
| +127% | +$171K |
|
4016
PUT
Clear Secure
YOU
$5.89B
| $421K | ﹤0.01% |
19,800
+11,200
| +130% | +$223K |
|
|
OCEA
4017
CALL
DELISTED
Ocean Biomedical, Inc. Common Stock
OCEA
| $421K | ﹤0.01% |
+111,400
| New | +$209K |
|
|
MDC
4018
CALL
DELISTED
M.D.C. Holdings, Inc.
MDC
| $421K | ﹤0.01% |
6,700
-3,700
| -36% | -$226K |
|
4019
PUT
United Natural Foods
UNFI
$3.05B
| $420K | ﹤0.01% |
36,600
+12,700
| +53% | +$185K |
|
|
VTNR
4020
CALL
DELISTED
Vertex Energy, Inc
VTNR
| $419K | ﹤0.01% |
299,600
-1,000
| -0.3% | -$1.59K |
|
4021
Xtrackers Harvest CSI 300 China A-Shares ETF
ASHR
$1.53B
| $418K | ﹤0.01% |
17,394
+6,806
| +64% | +$159K |
|
4022
CALL
Patrick Industries
PATK
$2.87B
| $418K | ﹤0.01% |
5,250
-49,350
| -90% | -$3.54M |
|
|
PMT
4023
PUT
PennyMac Mortgage Investment
PMT
$844M
| $418K | ﹤0.01% |
28,500
-2,000
| -7% | -$28.6K |
|
|
ACLX
4024
CALL
DELISTED
Arcellx
ACLX
| $417K | ﹤0.01% |
6,000
-41,100
| -87% | -$2.61M |
|
4025
Bausch + Lomb
BLCO
$5.81B
| $417K | ﹤0.01% |
+24,120
| New | +$375K |
|
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.