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 | |
|---|---|---|---|---|---|---|
5201
CALL
Garrett Motion
GTX
$5.81B
| $103K | ﹤0.01% |
12,600
+8,200
| +186% | +$69K |
|
|
HPP
5202
Hudson Pacific Properties
HPP
$747M
| $103K | ﹤0.01% |
3,079
-16,180
| -84% | -$582K |
|
5203
D-Wave Quantum Inc. Common Stock
QBTS
$6.7B
| $103K | ﹤0.01% |
104,816
-12,839
| -11% | -$12.8K |
|
5204
PUT
Red Rock Resorts
RRR
$3.77B
| $103K | ﹤0.01% |
1,900
-11,300
| -86% | -$629K |
|
5205
PUT
TETRA Technologies
TTI
$1.14B
| $103K | ﹤0.01% |
33,500
-48,800
| -59% | -$157K |
|
5206
CALL
Workhorse Group
WKHS
$33.2M
| $103K | ﹤0.01% |
793
-35
| -4% | -$5.92K |
|
|
SUM
5207
DELISTED
Summit Materials, Inc. Class A Common Stock
SUM
| $103K | ﹤0.01% |
2,646
+1,734
| +190% | +$66.7K |
|
|
AUGX
5208
DELISTED
Augmedix, Inc. Common Stock
AUGX
| $103K | ﹤0.01% |
44,130
+22,748
| +106% | +$45.9K |
|
5209
Alkami Technology
ALKT
$1.94B
| $102K | ﹤0.01% |
3,261
+234
| +8% | +$7.38K |
|
5210
PUT
Seres Therapeutics
MCRB
$46.8M
| $102K | ﹤0.01% |
5,405
-3,285
| -38% | -$66.6K |
|
5211
CALL
Ouster
OUST
$2.63B
| $102K | ﹤0.01% |
16,300
-7,900
| -33% | -$75.1K |
|
|
RPC
5212
Ridgepost Capital
RPC
$949M
| $102K | ﹤0.01% |
9,587
+5,072
| +112% | +$49.9K |
|
5213
CALL
Quest Resource Holding
QRHC
$26.8M
| $102K | ﹤0.01% |
12,800
-19,200
| -60% | -$164K |
|
|
SKE
5214
PUT
Skeena Resources
SKE
$3.3B
| $102K | ﹤0.01% |
12,100
+11,100
| +1,110% | +$80.3K |
|
|
SRG
5215
PUT
Seritage Growth Properties
SRG
$136M
| $102K | ﹤0.01% |
22,000
+17,000
| +340% | +$79.6K |
|
5216
CALL
TriMas Corp
TRS
$1.43B
| $102K | ﹤0.01% |
+4,000
| New | +$100K |
|
5217
PUT
Aemetis
AMTX
$106M
| $101K | ﹤0.01% |
44,200
-3,000
| -6% | -$8.41K |
|
|
CRDL
5218
CALL
Cardiol Therapeutics
CRDL
$146M
| $101K | ﹤0.01% |
51,400
-219,000
| -81% | -$454K |
|
5219
Denali Therapeutics
DNLI
$3.65B
| $101K | ﹤0.01% |
3,475
-1,459
| -30% | -$36.2K |
|
5220
CALL
Evercore
EVR
$12.4B
| $101K | ﹤0.01% |
400
-3,400
| -89% | -$809K |
|
5221
PUT
Fossil Group
FOSL
$293M
| $101K | ﹤0.01% |
86,800
+16,700
| +24% | +$19.6K |
|
5222
Ivanhoe Electric
IE
$1.45B
| $101K | ﹤0.01% |
+12,035
| New | +$101K |
|
5223
PUT
MidCap Financial Investment
MFIC
$787M
| $101K | ﹤0.01% |
7,600
+4,400
| +138% | +$62.1K |
|
5224
PUT
Pacific Biosciences
PACB
$435M
| $101K | ﹤0.01% |
59,900
+8,200
| +16% | +$13.5K |
|
5225
PUT
Progress Software
PRGS
$1.66B
| $101K | ﹤0.01% |
1,500
-800
| -35% | -$45.8K |
|
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.