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 | |
|---|---|---|---|---|---|---|
8651
Ultrapar
UGP
$6.87B
| $1K | ﹤0.01% |
285
-173
| -38% | -$999 |
|
8652
CALL
Unisys
UIS
$227M
| $1K | ﹤0.01% |
300
-1,700
| -85% | -$10.3K |
|
|
8653
PUT
Unisys
UIS
$227M
| $1K | ﹤0.01% |
+300
| New | +$1.82K |
|
8654
CALL
Wheels Up
UP
$220M
| $1K | ﹤0.01% |
25
-820
| -97% | -$54K |
|
8655
US Gold Corp
USAU
$220M
| $1K | ﹤0.01% |
409
+240
| +142% | +$878 |
|
8656
Veracyte
VCYT
$4.52B
| $1K | ﹤0.01% |
83
-8,270
| -99% | -$202K |
|
8657
CALL
Viemed Healthcare
VMD
$451M
| $1K | ﹤0.01% |
+200
| New | +$1.71K |
|
8658
CALL
VolitionRx Ltd
VNRX
$12M
| $1K | ﹤0.01% |
75
-145
| -66% | -$2.84K |
|
8659
VOC Energy
VOC
$57.5M
| $1K | ﹤0.01% |
276
-6,796
| -96% | -$45.7K |
|
|
8660
PUT
VOC Energy
VOC
$57.5M
| $1K | ﹤0.01% |
200
-300
| -60% | -$2.02K |
|
|
VRE
8661
CALL
DELISTED
Veris Residential
VRE
| $1K | ﹤0.01% |
+100
| New | +$1.51K |
|
8662
PUT
GeneDx Holdings
WGS
$1.75B
| $1K | ﹤0.01% |
200
-15,500
| -99% | -$93K |
|
8663
XBiotech
XBIT
$69.2M
| $1K | ﹤0.01% |
228
-398
| -64% | -$2.28K |
|
8664
CALL
Expro Ltd
XPRO
$1.79B
| $1K | ﹤0.01% |
100
-200
| -67% | -$3.59K |
|
|
YRD
8665
Yiren Digital
YRD
$103M
| $1K | ﹤0.01% |
317
+266
| +522% | +$1.26K |
|
|
YSG
8666
Yatsen Holding
YSG
$311M
| $1K | ﹤0.01% |
533
-560
| -51% | -$1.66K |
|
|
YSG
8667
PUT
Yatsen Holding
YSG
$311M
| $1K | ﹤0.01% |
700
-1,420
| -67% | -$4.21K |
|
|
ZEPP
8668
Zepp Health
ZEPP
$71.9M
| $1K | ﹤0.01% |
456
-296
| -39% | -$1.53K |
|
8669
CALL
Zevia
ZVIA
$108M
| $1K | ﹤0.01% |
900
-400
| -31% | -$617 |
|
|
ZYXI
8670
PUT
DELISTED
Zynex
ZYXI
| $1K | ﹤0.01% |
100
| – | – |
|
8671
BrightSpring Health Services
BTSG
$14.3B
| $1K | ﹤0.01% |
+176
| New | +$1.76K |
|
8672
American Healthcare REIT
AHR
$11.1B
| $1K | ﹤0.01% |
+118
| New | +$1.62K |
|
|
TBRG
8673
PUT
DELISTED
TruBridge
TBRG
| $1K | ﹤0.01% |
+200
| New | +$1.94K |
|
|
SPRB
8674
PUT
Spruce Biosciences
SPRB
$119M
| $1K | ﹤0.01% |
+20
| New | +$5.09K |
|
|
ENZ
8675
DELISTED
Enzo Biochem, Inc.
ENZ
| $1K | ﹤0.01% |
+881
| New | +$1.16K |
|
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.