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 | |
|---|---|---|---|---|---|---|
2676
CALL
Kratos Defense & Security Solutions
KTOS
$8.88B
| $1.52M | ﹤0.01% |
83,000
-32,900
| -28% | -$599K |
|
2677
CALL
Blink Charging
BLNK
$75.2M
| $1.52M | ﹤0.01% |
506,300
+35,000
| +7% | +$98.8K |
|
2678
PUT
Arcutis Biotherapeutics
ARQT
$3.42B
| $1.52M | ﹤0.01% |
153,000
+125,000
| +446% | +$933K |
|
2679
CALL
Amplify Energy
AMPY
$163M
| $1.51M | ﹤0.01% |
229,300
+134,600
| +142% | +$818K |
|
2680
CALL
Progyny
PGNY
$2.44B
| $1.51M | ﹤0.01% |
39,700
+16,800
| +73% | +$635K |
|
|
PRA
2681
PUT
DELISTED
ProAssurance
PRA
| $1.51M | ﹤0.01% |
117,700
+95,300
| +425% | +$1.23M |
|
2682
CALL
Applied Digital
APLD
$7.77B
| $1.51M | ﹤0.01% |
353,300
-364,800
| -51% | -$1.84M |
|
|
HUYA
2683
PUT
Huya Inc
HUYA
$542M
| $1.51M | ﹤0.01% |
332,400
-32,500
| -9% | -$118K |
|
|
SLCA
2684
CALL
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $1.51M | ﹤0.01% |
121,900
+113,100
| +1,285% | +$1.27M |
|
2685
PUT
Ollie's Bargain Outlet
OLLI
$4.01B
| $1.51M | ﹤0.01% |
19,000
+4,600
| +32% | +$348K |
|
2686
PUT
Box
BOX
$4.02B
| $1.51M | ﹤0.01% |
53,300
+11,500
| +28% | +$309K |
|
2687
CALL
Invesco DB Base Metals Fund
DBB
$306M
| $1.5M | ﹤0.01% |
65,000
+30,900
| +91% | +$541K |
|
|
AL
2688
DELISTED
Air Lease Corp
AL
| $1.5M | ﹤0.01% |
+29,198
| New | +$1.25M |
|
2689
Albertsons Companies
ACI
$5.4B
| $1.5M | ﹤0.01% |
69,995
+52,723
| +305% | +$1.13M |
|
2690
CALL
Franklin Resources
BEN
$16.9B
| $1.5M | ﹤0.01% |
53,300
+1,300
| +3% | +$35.8K |
|
2691
Advanced Drainage Systems
WMS
$10.9B
| $1.5M | ﹤0.01% |
8,701
+3,483
| +67% | +$524K |
|
2692
CALL
PubMatic
PUBM
$581M
| $1.5M | ﹤0.01% |
63,100
+9,400
| +18% | +$169K |
|
2693
PUT
Hawaiian Electric Industries
HE
$2.33B
| $1.49M | ﹤0.01% |
132,600
-73,500
| -36% | -$934K |
|
2694
CALL
Xcel Energy
XEL
$51B
| $1.49M | ﹤0.01% |
27,800
-17,700
| -39% | -$1.01M |
|
2695
PUT
LGI Homes
LGIH
$1.4B
| $1.49M | ﹤0.01% |
12,800
+6,600
| +106% | +$779K |
|
2696
Altimmune
ALT
$539M
| $1.49M | ﹤0.01% |
146,259
+81,128
| +125% | +$825K |
|
|
HIVE
2697
CALL
HIVE Digital Technologies
HIVE
$792M
| $1.49M | ﹤0.01% |
441,600
+5,700
| +1% | +$20.3K |
|
2698
CALL
American Superconductor
AMSC
$1.48B
| $1.49M | ﹤0.01% |
110,100
-68,800
| -38% | -$853K |
|
2699
CALL
Brink's
BCO
$5.02B
| $1.49M | ﹤0.01% |
16,100
-17,200
| -52% | -$1.43M |
|
2700
CALL
Kirby Corp
KEX
$7.95B
| $1.49M | ﹤0.01% |
15,600
+8,700
| +126% | +$734K |
|
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.