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 | |
|---|---|---|---|---|---|---|
6276
PUT
Riley Exploration Permian
REPX
$744M
| $49K | ﹤0.01% |
1,500
+900
| +150% | +$22.5K |
|
6277
CALL
Rigetti Computing
RGTI
$4.97B
| $49K | ﹤0.01% |
32,500
-21,800
| -40% | -$31.5K |
|
6278
PUT
Riskified
RSKD
$694M
| $49K | ﹤0.01% |
+9,100
| New | +$43.2K |
|
6279
Savara
SVRA
$1.12B
| $49K | ﹤0.01% |
10,019
+7,023
| +234% | +$33.9K |
|
6280
CALL
WaFd
WAFD
$2.72B
| $49K | ﹤0.01% |
1,700
+1,000
| +143% | +$28.8K |
|
6281
Beyond Air
XAIR
$3.8M
| $49K | ﹤0.01% |
71
+51
| +255% | +$35K |
|
6282
PUT
Xeris Biopharma Holdings
XERS
$1.39B
| $49K | ﹤0.01% |
22,500
+10,500
| +88% | +$27.2K |
|
|
PDCO
6283
PUT
DELISTED
Patterson Companies, Inc.
PDCO
| $49K | ﹤0.01% |
1,800
-14,200
| -89% | -$405K |
|
|
ENLC
6284
PUT
DELISTED
ENLINK MIDSTREAM, LLC
ENLC
| $49K | ﹤0.01% |
3,600
-23,200
| -87% | -$288K |
|
|
ACRE
6285
CALL
Ares Commercial Real Estate
ACRE
$236M
| $48K | ﹤0.01% |
6,500
+1,100
| +20% | +$9.57K |
|
6286
CALL
CG Oncology
CGON
$6.28B
| $48K | ﹤0.01% |
+1,100
| New | +$44.9K |
|
|
CIO
6287
CALL
DELISTED
City Office REIT
CIO
| $48K | ﹤0.01% |
9,400
-31,900
| -77% | -$161K |
|
6288
CALL
DT Midstream
DTM
$14.1B
| $48K | ﹤0.01% |
800
-2,400
| -75% | -$134K |
|
6289
PUT
Ecopetrol
EC
$34.5B
| $48K | ﹤0.01% |
4,100
-11,400
| -74% | -$132K |
|
6290
PUT
FIGS
FIGS
$1.79B
| $48K | ﹤0.01% |
9,700
+5,100
| +111% | +$29.3K |
|
6291
StealthGas
GASS
$332M
| $48K | ﹤0.01% |
8,202
+7,791
| +1,896% | +$52.5K |
|
6292
PUT
IDEX
IEX
$17B
| $48K | ﹤0.01% |
+200
| New | +$45.2K |
|
6293
CALL
NerdWallet
NRDS
$592M
| $48K | ﹤0.01% |
3,300
-4,300
| -57% | -$66.5K |
|
|
RGLS
6294
CALL
DELISTED
Regulus Therapeutics
RGLS
| $48K | ﹤0.01% |
17,000
-38,200
| -69% | -$62.3K |
|
|
RGLS
6295
PUT
DELISTED
Regulus Therapeutics
RGLS
| $48K | ﹤0.01% |
+16,700
| New | +$27.2K |
|
6296
PUT
Tootsie Roll Industries
TR
$2.93B
| $48K | ﹤0.01% |
1,591
+1,482
| +1,360% | +$44.9K |
|
6297
CALL
Wolverine World Wide
WWW
$1.61B
| $48K | ﹤0.01% |
4,300
+400
| +10% | +$3.71K |
|
|
CPE
6298
PUT
DELISTED
Callon Petroleum Company
CPE
| $48K | ﹤0.01% |
30,000
-41,800
| -58% | -$1.36M |
|
6299
AudioEye
AEYE
$72.3M
| $47K | ﹤0.01% |
4,753
+2,808
| +144% | +$18.4K |
|
6300
CALL
Alta Equipment Group
ALTG
$214M
| $47K | ﹤0.01% |
3,700
-21,400
| -85% | -$246K |
|
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.