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 | |
|---|---|---|---|---|---|---|
4426
Rexford Industrial Realty
REXR
$8.63B
| $293K | ﹤0.01% |
+5,828
| New | +$308K |
|
|
GATO
4427
CALL
DELISTED
Gatos Silver, Inc.
GATO
| $293K | ﹤0.01% |
35,000
+30,700
| +714% | +$204K |
|
4428
PUT
Sprinklr
CXM
$1.51B
| $292K | ﹤0.01% |
23,800
+21,400
| +892% | +$272K |
|
4429
PUT
Dine Brands
DIN
$462M
| $292K | ﹤0.01% |
6,300
| – | – |
|
|
RVPH
4430
CALL
DELISTED
REVIVA PHARMA HLDGS INC
RVPH
| $292K | ﹤0.01% |
3,875
-160
| -4% | -$12.7K |
|
|
OKLO
4431
CALL
Oklo
OKLO
$6.41B
| $292K | ﹤0.01% |
+25,600
| New | +$275K |
|
|
CMRC
4432
CALL
Commerce.com Inc Series 1
CMRC
$272M
| $291K | ﹤0.01% |
42,300
| – | – |
|
4433
CALL
Bioceres Crop Solutions
BIOX
$20.6M
| $291K | ﹤0.01% |
23,000
+100
| +0.4% | +$1.32K |
|
4434
PUT
CareDx
CDNA
$1.83B
| $291K | ﹤0.01% |
27,500
+25,800
| +1,518% | +$258K |
|
4435
PUT
Cheniere Energy
CQP
$30.5B
| $291K | ﹤0.01% |
5,900
+800
| +16% | +$40.6K |
|
4436
Magna International
MGA
$18.8B
| $291K | ﹤0.01% |
+5,359
| New | +$296K |
|
4437
CALL
Sibanye-Stillwater
SBSW
$6.05B
| $291K | ﹤0.01% |
61,900
-39,100
| -39% | -$180K |
|
|
CPE
4438
CALL
DELISTED
Callon Petroleum Company
CPE
| $291K | ﹤0.01% |
94,900
-83,100
| -47% | -$2.71M |
|
4439
Global X Artificial Intelligence & Technology ETF
AIQ
$8.89B
| $290K | ﹤0.01% |
8,549
+6,052
| +242% | +$196K |
|
4440
Crescent Energy
CRGY
$3.65B
| $290K | ﹤0.01% |
+24,448
| New | +$275K |
|
4441
Fulcrum Therapeutics
FULC
$241M
| $290K | ﹤0.01% |
+30,739
| New | +$274K |
|
4442
CALL
Greif
GEF
$4.95B
| $290K | ﹤0.01% |
4,200
-6,700
| -61% | -$427K |
|
4443
Hain Celestial
HAIN
$44.6M
| $290K | ﹤0.01% |
+36,986
| New | +$364K |
|
4444
CALL
Renaissance International IPO ETF
IPOS
$10.7M
| $290K | ﹤0.01% |
7,000
+4,400
| +169% | +$58.3K |
|
4445
Macy's
M
$6.51B
| $290K | ﹤0.01% |
14,550
-87,140
| -86% | -$1.68M |
|
4446
Revolve Group
RVLV
$1.85B
| $290K | ﹤0.01% |
13,701
-53,756
| -80% | -$943K |
|
4447
CALL
Buckle
BKE
$2.32B
| $289K | ﹤0.01% |
7,200
+2,400
| +50% | +$94.4K |
|
4448
CALL
Celldex Therapeutics
CLDX
$2.94B
| $289K | ﹤0.01% |
6,900
-29,500
| -81% | -$1.21M |
|
4449
PUT
Prospect Capital
PSEC
$1.08B
| $289K | ﹤0.01% |
52,400
+10,700
| +26% | +$61.6K |
|
|
VLRS
4450
Controladora Vuela Compania de Aviacion
VLRS
$869M
| $289K | ﹤0.01% |
39,014
-13,244
| -25% | -$102K |
|
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.