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 | |
|---|---|---|---|---|---|---|
851
CALL
CAVA Group
CAVA
$7.36B
| $15.6M | 0.01% |
223,000
+100,700
| +82% | +$5.4M |
|
852
CALL
Dynatrace
DT
$11.8B
| $15.6M | 0.01% |
335,500
+254,500
| +314% | +$13.3M |
|
853
CALL
PVH
PVH
$3.59B
| $15.6M | 0.01% |
110,800
+78,000
| +238% | +$9.98M |
|
854
PUT
CRISPR Therapeutics
CRSP
$4.68B
| $15.6M | 0.01% |
228,300
+44,100
| +24% | +$3.16M |
|
855
CALL
Nutrien
NTR
$32.9B
| $15.6M | 0.01% |
286,400
+64,800
| +29% | +$3.38M |
|
856
CALL
TripAdvisor
TRIP
$1.57B
| $15.5M | 0.01% |
559,300
+118,200
| +27% | +$2.87M |
|
857
CALL
Oneok
OKE
$58.7B
| $15.5M | 0.01% |
193,700
-181,900
| -48% | -$13.3M |
|
858
CALL
ProShares Ultra S&P500
SSO
$7.82B
| $15.5M | 0.01% |
404,000
-83,200
| -17% | -$2.94M |
|
859
CALL
Canadian Imperial Bank of Commerce
CM
$106B
| $15.5M | 0.01% |
304,700
+32,200
| +12% | +$1.52M |
|
|
MRO
860
CALL
DELISTED
Marathon Oil Corporation
MRO
| $15.4M | 0.01% |
545,200
-12,900
| -2% | -$311K |
|
861
PUT
CleanSpark
CLSK
$4.01B
| $15.4M | 0.01% |
727,100
+80,100
| +12% | +$1.11M |
|
862
CALL
Carlyle Group
CG
$16B
| $15.4M | 0.01% |
328,300
-84,900
| -21% | -$3.67M |
|
863
First Solar
FSLR
$22.1B
| $15.4M | 0.01% |
91,201
-49,630
| -35% | -$7.63M |
|
864
SoFi Technologies
SOFI
$21.4B
| $15.4M | 0.01% |
+2,106,379
| New | +$16.7M |
|
865
PUT
Ross Stores
ROST
$74.5B
| $15.4M | 0.01% |
104,600
-6,500
| -6% | -$931K |
|
866
American Tower
AMT
$76.7B
| $15.3M | 0.01% |
77,628
+22,091
| +40% | +$4.4M |
|
867
PUT
Skyworks Solutions
SWKS
$9.1B
| $15.3M | 0.01% |
141,400
+80,700
| +133% | +$8.46M |
|
868
CALL
Teva Pharmaceuticals
TEVA
$36.3B
| $15.3M | 0.01% |
1,085,300
+605,000
| +126% | +$7.63M |
|
869
CALL
Pan American Silver
PAAS
$18.6B
| $15.3M | 0.01% |
1,016,200
-160,500
| -14% | -$2.21M |
|
|
BNY
870
CALL
Bank of New York Mellon
BNY
$109B
| $15.3M | 0.01% |
265,500
+68,600
| +35% | +$3.78M |
|
|
UCD
871
PUT
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $15.3M | 0.01% |
186,600
-2,500
| -1% | -$205K |
|
872
PUT
Fair Isaac
FICO
$28B
| $15.2M | 0.01% |
12,200
+2,600
| +27% | +$3.25M |
|
873
PUT
Progressive
PGR
$120B
| $15.2M | 0.01% |
73,700
-151,300
| -67% | -$28.1M |
|
874
Deckers Outdoor
DECK
$13.4B
| $15.2M | 0.01% |
+97,092
| New | +$13.5M |
|
875
CALL
Hilton Worldwide
HLT
$72.9B
| $15.2M | 0.01% |
71,400
+19,800
| +38% | +$3.89M |
|
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.