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 | |
|---|---|---|---|---|---|---|
4126
CALL
Open Text
OTEX
$6.28B
| $380K | ﹤0.01% |
9,800
+9,500
| +3,167% | +$382K |
|
4127
Sprott Junior Uranium Miners ETF
URNJ
$302M
| $380K | ﹤0.01% |
14,956
-56,156
| -79% | -$1.45M |
|
4128
CALL
BJ's Restaurants
BJRI
$1.47B
| $379K | ﹤0.01% |
10,500
+3,900
| +59% | +$136K |
|
|
GMS
4129
CALL
DELISTED
GMS Inc
GMS
| $379K | ﹤0.01% |
3,900
-200
| -5% | -$17.5K |
|
4130
CALL
La-Z-Boy
LZB
$1.64B
| $379K | ﹤0.01% |
10,100
+8,800
| +677% | +$321K |
|
4131
CALL
OR Royalties Inc
OR
$5.53B
| $379K | ﹤0.01% |
23,100
+6,000
| +35% | +$88.7K |
|
4132
American Coastal Insurance
ACIC
$536M
| $378K | ﹤0.01% |
35,442
+13,410
| +61% | +$152K |
|
|
CRON
4133
Cronos Group
CRON
$1.07B
| $378K | ﹤0.01% |
144,921
-56,900
| -28% | -$122K |
|
4134
iShares Core S&P Small-Cap ETF
IJR
$109B
| $378K | ﹤0.01% |
+3,422
| New | +$363K |
|
4135
CALL
Paylocity
PCTY
$7.75B
| $378K | ﹤0.01% |
2,200
-17,200
| -89% | -$2.84M |
|
4136
CALL
SkyWater Technology
SKYT
$1.5B
| $378K | ﹤0.01% |
37,200
+9,400
| +34% | +$92.5K |
|
4137
Tennant Co
TNC
$1.44B
| $378K | ﹤0.01% |
+3,111
| New | +$318K |
|
4138
PUT
Beazer Homes USA
BZH
$888M
| $377K | ﹤0.01% |
11,500
+7,300
| +174% | +$226K |
|
4139
PUT
Arcos Dorados Holdings
ARCO
$1.74B
| $376K | ﹤0.01% |
33,900
+28,800
| +565% | +$342K |
|
4140
PUT
Vita Coco
COCO
$3.86B
| $376K | ﹤0.01% |
15,400
+5,100
| +50% | +$118K |
|
4141
PUT
Innoviz Technologies
INVZ
$84.1M
| $376K | ﹤0.01% |
278,800
-155,100
| -36% | -$260K |
|
4142
CALL
RxSight
RXST
$254M
| $376K | ﹤0.01% |
7,300
+5,700
| +356% | +$280K |
|
|
OLK
4143
PUT
DELISTED
Olink Holding AB (publ) American Depositary Shares
OLK
| $376K | ﹤0.01% |
16,000
-14,200
| -47% | -$343K |
|
4144
NuScale Power
SMR
$2.63B
| $375K | ﹤0.01% |
70,733
+68,983
| +3,942% | +$248K |
|
4145
CALL
TPG
TPG
$6.76B
| $375K | ﹤0.01% |
8,400
+2,600
| +45% | +$111K |
|
|
X
4146
DELISTED
US Steel
X
| $375K | ﹤0.01% |
+9,214
| New | +$422K |
|
4147
PUT
SI-BONE Inc
SIBN
$818M
| $374K | ﹤0.01% |
22,900
+22,800
| +22,800% | +$429K |
|
4148
TETRA Technologies
TTI
$1.08B
| $374K | ﹤0.01% |
+84,566
| New | +$351K |
|
|
RVNC
4149
PUT
DELISTED
Revance Therapeutics, Inc.
RVNC
| $374K | ﹤0.01% |
76,200
+18,600
| +32% | +$110K |
|
|
SIX
4150
DELISTED
Six Flags Entertainment Corp.
SIX
| $374K | ﹤0.01% |
14,218
-18,511
| -57% | -$465K |
|
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.