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 | |
|---|---|---|---|---|---|---|
4326
CALL
Legend Biotech
LEGN
$3.74B
| $243K | ﹤0.01% |
5,000
-8,100
| -62% | -$431K |
|
|
RVNC
4327
PUT
DELISTED
Revance Therapeutics, Inc.
RVNC
| $243K | ﹤0.01% |
47,000
-35,000
| -43% | -$174K |
|
4328
PUT
EyePoint Inc
EYPT
$1.01B
| $242K | ﹤0.01% |
30,300
-165,800
| -85% | -$1.46M |
|
|
JFIN
4329
PUT
Jiayin Group
JFIN
$119M
| $242K | ﹤0.01% |
35,200
-5,000
| -12% | -$28.7K |
|
|
MRSN
4330
PUT
DELISTED
Mersana Therapeutics
MRSN
| $242K | ﹤0.01% |
5,128
-56
| -1% | -$2.47K |
|
|
RWT
4331
Redwood Trust
RWT
$584M
| $242K | ﹤0.01% |
+31,387
| New | +$229K |
|
|
4332
CALL
EyePoint Inc
EYPT
$1.01B
| $241K | ﹤0.01% |
30,200
-22,400
| -43% | -$197K |
|
4333
PUT
Invesco CurrencyShares Swiss Franc Trust
FXF
$409M
| $241K | ﹤0.01% |
+2,300
| New | +$236K |
|
4334
PUT
Medifast
MED
$108M
| $241K | ﹤0.01% |
12,600
-168,200
| -93% | -$3.24M |
|
4335
CALL
Phreesia
PHR
$673M
| $241K | ﹤0.01% |
10,600
+2,200
| +26% | +$51.5K |
|
4336
UroGen Pharma
URGN
$2.01B
| $241K | ﹤0.01% |
19,031
+8,412
| +79% | +$125K |
|
4337
Gogo Inc
GOGO
$538M
| $240K | ﹤0.01% |
33,456
-11,144
| -25% | -$90.9K |
|
4338
PUT
GoPro
GPRO
$124M
| $240K | ﹤0.01% |
176,900
+49,400
| +39% | +$68K |
|
|
NGD
4339
DELISTED
New Gold Inc
NGD
| $240K | ﹤0.01% |
83,467
+18,425
| +28% | +$45.6K |
|
4340
FreightCar America
RAIL
$276M
| $240K | ﹤0.01% |
22,333
+11,444
| +105% | +$66.8K |
|
4341
PUT
West Pharmaceutical
WST
$23.7B
| $240K | ﹤0.01% |
800
-100
| -11% | -$30.6K |
|
4342
PUT
Babcock & Wilcox
BW
$1.3B
| $239K | ﹤0.01% |
117,600
+77,600
| +194% | +$110K |
|
|
ESPR
4343
PUT
DELISTED
Esperion Therapeutics
ESPR
| $239K | ﹤0.01% |
145,300
+26,800
| +23% | +$54.1K |
|
4344
CALL
East-West Bancorp
EWBC
$17.9B
| $239K | ﹤0.01% |
2,900
-3,600
| -55% | -$289K |
|
4345
PUT
Hess Midstream
HESM
$5.18B
| $239K | ﹤0.01% |
6,800
+400
| +6% | +$14.7K |
|
|
OLPX
4346
DELISTED
Olaplex Holdings
OLPX
| $239K | ﹤0.01% |
101,822
+47,063
| +86% | +$95.4K |
|
4347
CALL
Cousins Properties
CUZ
$5.29B
| $238K | ﹤0.01% |
8,100
+2,900
| +56% | +$78.1K |
|
|
HAPN
4348
PUT
Happen Inc
HAPN
$2.16B
| $238K | ﹤0.01% |
20,900
-10,600
| -34% | -$113K |
|
4349
CALL
LifeMD
LFMD
$188M
| $238K | ﹤0.01% |
45,500
+35,900
| +374% | +$207K |
|
|
PPL
4350
PPL Corp
PPL
$27.4B
| $238K | ﹤0.01% |
+7,197
| New | +$220K |
|
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.