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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3076
PUT
American Conservative Values ETF
ACVF
$151M
| $844K | ﹤0.01% |
74,500
+59,300
| +390% | +$2.49M |
|
3077
JB Hunt Transport Services
JBHT
$26.2B
| $843K | ﹤0.01% |
4,895
-3,058
| -38% | -$514K |
|
3078
PUT
ALPS REIT Dividend Dogs ETF
RDOG
$11.6M
| $843K | ﹤0.01% |
19,100
-100
| -0.5% | -$4K |
|
3079
CALL
JFrog
FROG
$9.78B
| $842K | ﹤0.01% |
29,000
-12,400
| -30% | -$390K |
|
|
TPH
3080
CALL
DELISTED
Tri Pointe Homes
TPH
| $842K | ﹤0.01% |
18,600
-9,100
| -33% | -$389K |
|
3081
Harmony Gold Mining
HMY
$9.8B
| $841K | ﹤0.01% |
82,704
+36,234
| +78% | +$353K |
|
3082
PUT
The Greenbrier Companies
GBX
$1.6B
| $839K | ﹤0.01% |
16,500
-6,800
| -29% | -$324K |
|
3083
CALL
Coursera
COUR
$1.59B
| $838K | ﹤0.01% |
105,600
+84,200
| +393% | +$665K |
|
3084
Flowserve
FLS
$9.18B
| $838K | ﹤0.01% |
+16,216
| New | +$781K |
|
3085
PUT
Sable Offshore Corp
SOC
$836M
| $838K | ﹤0.01% |
+35,500
| New | +$639K |
|
3086
CALL
SELLAS Life Sciences
SLS
$2.22B
| $837K | ﹤0.01% |
669,600
+241,400
| +56% | +$295K |
|
3087
CALL
Agree Realty
ADC
$9.73B
| $836K | ﹤0.01% |
11,100
+4,700
| +73% | +$333K |
|
|
JNPR
3088
DELISTED
Juniper Networks
JNPR
| $831K | ﹤0.01% |
21,321
-2,802
| -12% | -$107K |
|
3089
CALL
Photronics
PLAB
$1.73B
| $831K | ﹤0.01% |
33,600
-1,600
| -5% | -$38.7K |
|
3090
CALL
G-III Apparel Group
GIII
$1.51B
| $830K | ﹤0.01% |
27,200
+2,600
| +11% | +$71.2K |
|
3091
BridgeBio Pharma
BBIO
$16.9B
| $827K | ﹤0.01% |
32,499
-48,733
| -60% | -$1.28M |
|
3092
CALL
BlackSky Technology
BKSY
$808M
| $827K | ﹤0.01% |
174,500
+169,575
| +3,443% | +$1.34M |
|
3093
Granite Construction
GVA
$5.5B
| $827K | ﹤0.01% |
10,436
+4,956
| +90% | +$348K |
|
|
JNPR
3094
PUT
DELISTED
Juniper Networks
JNPR
| $826K | ﹤0.01% |
21,200
-16,500
| -44% | -$630K |
|
3095
PUT
Joby Aviation
JOBY
$7.05B
| $826K | ﹤0.01% |
164,400
-9,000
| -5% | -$49K |
|
|
NLOP
3096
CALL
Net Lease Office Properties
NLOP
$167M
| $826K | ﹤0.01% |
27,000
+3,600
| +15% | +$104K |
|
|
MESO
3097
CALL
Mesoblast
MESO
$1.93B
| $825K | ﹤0.01% |
101,000
+21,100
| +26% | +$143K |
|
3098
PUT
Pegasystems
PEGA
$4.74B
| $825K | ﹤0.01% |
22,600
-25,800
| -53% | -$850K |
|
|
ARR
3099
CALL
Armour Residential REIT
ARR
$2.03B
| $824K | ﹤0.01% |
40,400
-21,700
| -35% | -$442K |
|
3100
CALL
Genesis Energy
GEL
$1.81B
| $824K | ﹤0.01% |
61,700
-19,200
| -24% | -$261K |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.