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 | |
|---|---|---|---|---|---|---|
5201
AXT Inc
AXTI
$3.95B
| $143K | ﹤0.01% |
31,338
+28,138
| +879% | +$95.6K |
|
5202
Covenant Logistics
CVLG
$894M
| $143K | ﹤0.01% |
6,208
+6,180
| +22,071% | +$148K |
|
5203
PUT
Steven Madden
SHOO
$3.37B
| $143K | ﹤0.01% |
+3,400
| New | +$143K |
|
5204
Vera Therapeutics
VERA
$2.3B
| $143K | ﹤0.01% |
+3,329
| New | +$119K |
|
5205
PUT
NCR Voyix
VYX
$1.14B
| $143K | ﹤0.01% |
12,600
-57,000
| -82% | -$821K |
|
5206
PUT
Clover Health Investments
CLOV
$2.2B
| $142K | ﹤0.01% |
179,800
+98,000
| +120% | +$89.2K |
|
5207
PUT
Commault Systems
CVLT
$4.88B
| $142K | ﹤0.01% |
1,400
-500
| -26% | -$45.2K |
|
5208
CALL
1-800-Flowers.com
FLWS
$250M
| $142K | ﹤0.01% |
13,200
-8,500
| -39% | -$87.3K |
|
5209
CALL
Ituran Location and Control
ITRN
$1.09B
| $142K | ﹤0.01% |
5,100
+5,000
| +5,000% | +$132K |
|
|
KC
5210
CALL
Kingsoft Cloud Holdings
KC
$3.34B
| $142K | ﹤0.01% |
46,900
-27,600
| -37% | -$80.3K |
|
5211
PUT
Metropolitan Bank Holding Corp
MCB
$1.15B
| $142K | ﹤0.01% |
3,700
-1,700
| -31% | -$74.4K |
|
5212
PUT
PLAYSTUDIOS Inc
MYPS
$77.9M
| $142K | ﹤0.01% |
+51,400
| New | +$119K |
|
|
SAND
5213
PUT
DELISTED
Sandstorm Gold
SAND
| $142K | ﹤0.01% |
27,200
-13,100
| -33% | -$60.6K |
|
5214
Zurn Elkay Water Solutions
ZWS
$8.38B
| $142K | ﹤0.01% |
4,246
+3,441
| +427% | +$106K |
|
|
PWSC
5215
PUT
DELISTED
PowerSchool Holdings, Inc.
PWSC
| $142K | ﹤0.01% |
6,700
+5,600
| +509% | +$127K |
|
|
HA
5216
CALL
DELISTED
Hawaiian Holdings, Inc.
HA
| $142K | ﹤0.01% |
10,700
-26,500
| -71% | -$369K |
|
5217
Alpha Pro Tech
APT
$50.4M
| $141K | ﹤0.01% |
+22,649
| New | +$124K |
|
|
SLAI
5218
CALL
DELISTED
SOLAI Ltd ADS
SLAI
| $141K | ﹤0.01% |
6,886
+1,800
| +35% | +$47.7K |
|
5219
PUT
Corbus Pharmaceuticals
CRBP
$166M
| $141K | ﹤0.01% |
+3,600
| New | +$88.8K |
|
5220
CALL
CryoPort
CYRX
$761M
| $141K | ﹤0.01% |
8,000
-23,700
| -75% | -$375K |
|
|
DADA
5221
DELISTED
Dada Nexus
DADA
| $141K | ﹤0.01% |
68,918
+20,850
| +43% | +$44.6K |
|
5222
PUT
Inspired Entertainment
INSE
$184M
| $141K | ﹤0.01% |
14,400
+13,100
| +1,008% | +$122K |
|
5223
PUT
Ouster
OUST
$2.63B
| $141K | ﹤0.01% |
17,800
+13,900
| +356% | +$79.1K |
|
5224
CALL
Red Robin
RRGB
$145M
| $141K | ﹤0.01% |
18,500
+12,100
| +189% | +$111K |
|
5225
PUT
Revolve Group
RVLV
$1.8B
| $141K | ﹤0.01% |
6,700
-63,400
| -90% | -$1.11M |
|
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.