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 | |
|---|---|---|---|---|---|---|
4076
PUT
Invesco Mortgage Capital
IVR
$759M
| $397K | ﹤0.01% |
41,100
-62,300
| -60% | -$559K |
|
4077
CALL
Aemetis
AMTX
$99.2M
| $395K | ﹤0.01% |
66,100
-60,800
| -48% | -$231K |
|
4078
CALL
Backblaze
BLZE
$683M
| $395K | ﹤0.01% |
38,700
+31,100
| +409% | +$287K |
|
4079
AB InBev
BUD
$164B
| $395K | ﹤0.01% |
+6,508
| New | +$407K |
|
4080
CALL
Treace Medical Concepts
TMCI
$262M
| $395K | ﹤0.01% |
30,300
+9,500
| +46% | +$127K |
|
4081
iShares MSCI China Small-Cap ETF
ECNS
$64.5M
| $394K | ﹤0.01% |
+16,479
| New | +$384K |
|
4082
CALL
Innodata
INOD
$1.81B
| $394K | ﹤0.01% |
59,700
+39,700
| +199% | +$330K |
|
|
IPG
4083
DELISTED
Interpublic Group of Companies
IPG
| $394K | ﹤0.01% |
12,080
-40,417
| -77% | -$1.31M |
|
4084
PUT
SandRidge Energy
SD
$503M
| $394K | ﹤0.01% |
27,100
-8,600
| -24% | -$116K |
|
4085
CALL
Vita Coco
COCO
$3.86B
| $393K | ﹤0.01% |
16,100
+5,300
| +49% | +$123K |
|
4086
Comfort Systems
FIX
$53.5B
| $393K | ﹤0.01% |
+1,237
| New | +$316K |
|
4087
PUT
Sally Beauty Holdings
SBH
$1.47B
| $393K | ﹤0.01% |
31,700
-9,700
| -23% | -$121K |
|
4088
CALL
BBVA Argentina
BBAR
$3.85B
| $392K | ﹤0.01% |
46,300
+10,800
| +30% | +$67.5K |
|
4089
CALL
Brown-Forman Class B
BF.B
$13.5B
| $392K | ﹤0.01% |
7,600
+3,700
| +95% | +$206K |
|
4090
CALL
TMC The Metals Company
TMC
$1.49B
| $392K | ﹤0.01% |
274,400
-133,200
| -33% | -$186K |
|
4091
PUT
Saic
SAIC
$4.95B
| $391K | ﹤0.01% |
3,000
+1,300
| +76% | +$172K |
|
4092
CALL
TORM
TRMD
$3.05B
| $391K | ﹤0.01% |
11,200
+6,600
| +143% | +$224K |
|
|
HRT
4093
DELISTED
HireRight Holdings Corporation
HRT
| $391K | ﹤0.01% |
27,419
-28,187
| -51% | -$378K |
|
|
XELA
4094
CALL
DELISTED
Exela Technologies, Inc. Common Stock
XELA
| $391K | ﹤0.01% |
120,400
-219,500
| -65% | -$534K |
|
4095
PUT
Syndax Pharmaceuticals
SNDX
$1.7B
| $390K | ﹤0.01% |
16,400
-131,800
| -89% | -$2.94M |
|
4096
Allison Transmission
ALSN
$9.51B
| $389K | ﹤0.01% |
4,801
-5,541
| -54% | -$374K |
|
|
AZUL
4097
PUT
DELISTED
Azul
AZUL
| $389K | ﹤0.01% |
50,100
-25,200
| -33% | -$200K |
|
4098
iShares MSCI South Korea ETF
EWY
$20.1B
| $389K | ﹤0.01% |
+5,800
| New | +$368K |
|
4099
CALL
Heron Therapeutics
HRTX
$93.4M
| $389K | ﹤0.01% |
140,500
+52,200
| +59% | +$131K |
|
4100
PUT
Kyndryl
KD
$3.09B
| $389K | ﹤0.01% |
17,900
-75,000
| -81% | -$1.59M |
|
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.