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 | |
|---|---|---|---|---|---|---|
2476
CALL
Arrow Electronics
ARW
$10.9B
| $1.86M | ﹤0.01% |
14,400
+13,600
| +1,700% | +$1.59M |
|
2477
CALL
Pitney Bowes
PBI
$2.42B
| $1.86M | ﹤0.01% |
429,800
+372,700
| +653% | +$1.54M |
|
2478
Sphere Entertainment
SPHR
$4.88B
| $1.86M | ﹤0.01% |
37,930
-43,699
| -54% | -$1.75M |
|
2479
CALL
Pagaya Technologies
PGY
$1.32B
| $1.86M | ﹤0.01% |
184,100
+177,517
| +2,697% | +$2.52M |
|
2480
CALL
Smith & Wesson
SWBI
$655M
| $1.86M | ﹤0.01% |
107,000
+20,000
| +23% | +$289K |
|
2481
PUT
Aehr Test Systems
AEHR
$2.48B
| $1.86M | ﹤0.01% |
149,700
+114,200
| +322% | +$1.9M |
|
2482
CALL
Interactive Brokers
IBKR
$40.9B
| $1.85M | ﹤0.01% |
66,400
-557,600
| -89% | -$13.9M |
|
2483
PUT
HEICO Corp Class A
HEI.A
$35.4B
| $1.85M | ﹤0.01% |
9,700
+4,500
| +87% | +$666K |
|
2484
PUT
Grab
GRAB
$13.5B
| $1.84M | ﹤0.01% |
587,300
+79,700
| +16% | +$256K |
|
2485
PUT
Ingersoll Rand
IR
$33B
| $1.84M | ﹤0.01% |
19,400
-15,000
| -44% | -$1.28M |
|
2486
CALL
Coty
COTY
$2.33B
| $1.84M | ﹤0.01% |
153,900
-211,400
| -58% | -$2.58M |
|
2487
Skywest
SKYW
$4.11B
| $1.84M | ﹤0.01% |
26,578
+16,473
| +163% | +$977K |
|
2488
MakeMyTrip
MMYT
$4.67B
| $1.83M | ﹤0.01% |
25,838
+14,410
| +126% | +$820K |
|
2489
Ovintiv
OVV
$17.5B
| $1.83M | ﹤0.01% |
+35,360
| New | +$1.61M |
|
2490
CALL
Biomea Fusion
BMEA
$90.4M
| $1.83M | ﹤0.01% |
122,300
-225,300
| -65% | -$3.71M |
|
2491
CALL
Universal Technical Institute
UTI
$2.08B
| $1.83M | ﹤0.01% |
114,700
+110,300
| +2,507% | +$1.6M |
|
|
EMBJ
2492
Embraer S.A. ADS
EMBJ
$11.6B
| $1.81M | ﹤0.01% |
+68,155
| New | +$1.35M |
|
2493
PUT
Warrior Met Coal
HCC
$4.23B
| $1.81M | ﹤0.01% |
29,900
+2,500
| +9% | +$151K |
|
2494
CALL
Appian
APPN
$1.74B
| $1.81M | ﹤0.01% |
45,400
+2,800
| +7% | +$97.1K |
|
2495
PUT
Kinross Gold
KGC
$28.5B
| $1.81M | ﹤0.01% |
295,800
-403,400
| -58% | -$2.19M |
|
2496
CALL
PTC
PTC
$13.7B
| $1.81M | ﹤0.01% |
9,600
-7,000
| -42% | -$1.26M |
|
2497
PUT
Booz Allen Hamilton
BAH
$8.7B
| $1.81M | ﹤0.01% |
12,200
-200
| -2% | -$28.2K |
|
2498
CALL
Hecla Mining
HL
$10.2B
| $1.81M | ﹤0.01% |
376,400
-153,400
| -29% | -$612K |
|
2499
PUT
PagSeguro Digital
PAGS
$2.57B
| $1.81M | ﹤0.01% |
126,800
-24,400
| -16% | -$323K |
|
2500
BRC Group Holdings
RILY
$277M
| $1.81M | ﹤0.01% |
+85,542
| New | +$1.72M |
|
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.