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 | |
|---|---|---|---|---|---|---|
|
KLG
5276
PUT
DELISTED
WK Kellogg Co
KLG
| $135K | ﹤0.01% |
7,200
-7,000
| -49% | -$102K |
|
5277
Telus
TU
$14.9B
| $135K | ﹤0.01% |
+8,434
| New | +$148K |
|
5278
PUT
U-Haul Holding Co Series N
UHAL.B
$12.2B
| $135K | ﹤0.01% |
+2,000
| New | +$129K |
|
5279
Danaos Corp
DAC
$2.58B
| $134K | ﹤0.01% |
+1,863
| New | +$137K |
|
5280
Haleon
HLN
$43.5B
| $134K | ﹤0.01% |
15,784
-18,673
| -54% | -$156K |
|
|
SHCO
5281
PUT
DELISTED
Soho House & Co
SHCO
| $134K | ﹤0.01% |
23,800
+1,200
| +5% | +$7.26K |
|
5282
PUT
ABM Industries
ABM
$2.81B
| $133K | ﹤0.01% |
3,000
-1,900
| -39% | -$79.6K |
|
|
ARR
5283
Armour Residential REIT
ARR
$2.33B
| $133K | ﹤0.01% |
+6,732
| New | +$129K |
|
5284
CALL
Frontdoor
FTDR
$5.1B
| $133K | ﹤0.01% |
+4,100
| New | +$133K |
|
5285
CALL
Helix Energy Solutions
HLX
$1.4B
| $133K | ﹤0.01% |
12,300
+10,000
| +435% | +$97.3K |
|
5286
PUT
NextNav
NN
$1.79B
| $133K | ﹤0.01% |
40,300
+32,800
| +437% | +$146K |
|
5287
PUT
Vicor
VICR
$9.56B
| $133K | ﹤0.01% |
3,500
+1,900
| +119% | +$73.9K |
|
5288
CALL
Yext
YEXT
$547M
| $133K | ﹤0.01% |
22,200
+18,900
| +573% | +$112K |
|
|
EXAI
5289
DELISTED
Exscientia Plc American Depositary Shares
EXAI
| $133K | ﹤0.01% |
23,316
+11,615
| +99% | +$72.2K |
|
|
ENV
5290
CALL
DELISTED
ENVESTNET, INC.
ENV
| $133K | ﹤0.01% |
2,300
+2,100
| +1,050% | +$110K |
|
5291
PUT
Advanced Energy
AEIS
$11.6B
| $132K | ﹤0.01% |
1,300
-800
| -38% | -$81.6K |
|
|
CTLP
5292
DELISTED
Cantaloupe
CTLP
| $132K | ﹤0.01% |
+20,649
| New | +$136K |
|
5293
CALL
OppFi
OPFI
$800M
| $132K | ﹤0.01% |
53,000
+33,100
| +166% | +$112K |
|
5294
PUT
W.R. Berkley
WRB
$26.9B
| $132K | ﹤0.01% |
2,250
-10,050
| -82% | -$544K |
|
5295
PUT
Anavex Life Sciences
AVXL
$255M
| $131K | ﹤0.01% |
25,900
-15,800
| -38% | -$88.9K |
|
5296
CALL
CNO Financial Group
CNO
$5.14B
| $131K | ﹤0.01% |
4,800
-1,700
| -26% | -$45.9K |
|
5297
PUT
Delek Logistics
DKL
$3.21B
| $131K | ﹤0.01% |
3,200
+2,600
| +433% | +$114K |
|
|
DRD
5298
DRDGold
DRD
$1.77B
| $131K | ﹤0.01% |
16,044
+900
| +6% | +$6.82K |
|
5299
PUT
ManpowerGroup
MAN
$2.44B
| $131K | ﹤0.01% |
1,700
+800
| +89% | +$59.5K |
|
5300
PUT
MDU Resources
MDU
$4.17B
| $131K | ﹤0.01% |
9,386
+6,498
| +225% | +$75.2K |
|
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.