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 | |
|---|---|---|---|---|---|---|
|
DENT
1151
PUT
DELISTED
AdvisorShares Dent Tactical ETF
DENT
| $9.55M | 0.01% |
1,023,000
+346,300
| +51% | +$3.23M |
|
1152
PUT
MasTec
MTZ
$26.7B
| $9.54M | 0.01% |
102,300
-22,900
| -18% | -$1.74M |
|
1153
CALL
Vanguard Consumer Discretionary ETF
VCR
$5.84B
| $9.53M | 0.01% |
25,400
-3,500
| -12% | -$1.07M |
|
1154
CALL
EQT Corp
EQT
$33.2B
| $9.53M | 0.01% |
257,100
-394,900
| -61% | -$14.1M |
|
1155
PUT
Franco-Nevada
FNV
$41.4B
| $9.52M | 0.01% |
79,900
+36,700
| +85% | +$4.04M |
|
1156
PUT
Burlington
BURL
$22B
| $9.5M | 0.01% |
40,900
-39,400
| -49% | -$8.04M |
|
1157
PUT
KBR
KBR
$4.68B
| $9.45M | 0.01% |
148,500
-13,800
| -9% | -$786K |
|
1158
CALL
Becton Dickinson
BDX
$43.1B
| $9.45M | 0.01% |
38,200
-58,300
| -60% | -$14M |
|
|
DFS
1159
PUT
DELISTED
Discover Financial Services
DFS
| $9.41M | 0.01% |
71,800
-80,300
| -53% | -$9.2M |
|
1160
PUT
Knight Transportation
KNX
$11.8B
| $9.4M | 0.01% |
170,900
+104,700
| +158% | +$5.91M |
|
|
SAVE
1161
CALL
DELISTED
Spirit Airlines, Inc.
SAVE
| $9.39M | 0.01% |
1,939,700
+1,337,400
| +222% | +$9.89M |
|
|
SWAV
1162
CALL
DELISTED
Shockwave Medical, Inc. Common Stock
SWAV
| $9.38M | 0.01% |
28,800
-9,500
| -25% | -$2.33M |
|
|
CYBR
1163
PUT
DELISTED
CyberArk
CYBR
| $9.38M | 0.01% |
35,300
-1,600
| -4% | -$396K |
|
1164
CALL
SL Green Realty
SLG
$3.88B
| $9.37M | 0.01% |
169,900
+300
| +0.2% | +$14.2K |
|
1165
CALL
Inspire Medical Systems
INSP
$1.42B
| $9.36M | 0.01% |
43,600
+28,800
| +195% | +$5.65M |
|
1166
CALL
Welltower
WELL
$178B
| $9.34M | 0.01% |
100,000
+21,500
| +27% | +$1.95M |
|
1167
CALL
Cintas
CTAS
$82.4B
| $9.34M | 0.01% |
54,400
+2,400
| +5% | +$370K |
|
1168
PUT
Fastenal
FAST
$54B
| $9.33M | 0.01% |
242,000
+150,000
| +163% | +$5.3M |
|
|
1169
CALL
Fastenal
FAST
$54B
| $9.3M | 0.01% |
241,200
+10,200
| +4% | +$361K |
|
1170
PUT
Kenvue
KVUE
$37B
| $9.3M | 0.01% |
433,200
-1,686,700
| -80% | -$34.2M |
|
1171
Teva Pharmaceuticals
TEVA
$35.9B
| $9.28M | 0.01% |
657,687
+10,607
| +2% | +$134K |
|
1172
CALL
Floor & Decor
FND
$5.81B
| $9.27M | 0.01% |
71,500
-5,000
| -7% | -$568K |
|
1173
PUT
GSK
GSK
$103B
| $9.26M | 0.01% |
216,100
-92,600
| -30% | -$3.82M |
|
|
K
1174
CALL
DELISTED
Kellanova
K
| $9.26M | 0.01% |
178,500
+28,200
| +19% | +$1.55M |
|
1175
United Parcel Service
UPS
$97.6B
| $9.25M | 0.01% |
62,262
+8,963
| +17% | +$1.36M |
|
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.