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 | |
|---|---|---|---|---|---|---|
3276
PUT
FuboTV Inc
FUBO
$256M
| $863K | ﹤0.01% |
45,525
-43,317
| -49% | -$1.13M |
|
|
NAPA
3277
CALL
DELISTED
The Duckhorn Portfolio, Inc.
NAPA
| $863K | ﹤0.01% |
92,700
+1,100
| +1% | +$10.1K |
|
3278
PUT
TransDigm Group
TDG
$71.9B
| $862K | ﹤0.01% |
700
-4,300
| -86% | -$4.84M |
|
3279
CALL
Shutterstock
SSTK
$216M
| $861K | ﹤0.01% |
18,800
-7,500
| -29% | -$357K |
|
|
AVDX
3280
CALL
DELISTED
AvidXchange
AVDX
| $860K | ﹤0.01% |
65,400
+28,800
| +79% | +$346K |
|
3281
PUT
Cinemark Holdings
CNK
$3.93B
| $860K | ﹤0.01% |
47,900
-86,800
| -64% | -$1.37M |
|
3282
CALL
Choice Hotels
CHH
$5.15B
| $859K | ﹤0.01% |
6,800
-10,100
| -60% | -$1.21M |
|
3283
CALL
Standard BioTools
LAB
$303M
| $859K | ﹤0.01% |
+317,000
| New | +$765K |
|
3284
CALL
10x Genomics
TXG
$5.83B
| $859K | ﹤0.01% |
22,900
-33,700
| -60% | -$1.48M |
|
3285
Valvoline
VVV
$5.05B
| $859K | ﹤0.01% |
19,294
+14,120
| +273% | +$563K |
|
3286
PUT
United Microelectronic
UMC
$47.9B
| $857K | ﹤0.01% |
106,000
+78,200
| +281% | +$622K |
|
3287
ITT
ITT
$17.7B
| $856K | ﹤0.01% |
6,299
+2,934
| +87% | +$364K |
|
3288
PUT
Customers Bancorp
CUBI
$2.66B
| $854K | ﹤0.01% |
16,100
+6,600
| +69% | +$348K |
|
3289
PUT
Jazz Pharmaceuticals
JAZZ
$16B
| $854K | ﹤0.01% |
7,100
-5,600
| -44% | -$686K |
|
3290
CALL
Century Aluminum
CENX
$4.44B
| $852K | ﹤0.01% |
55,400
-113,600
| -67% | -$1.28M |
|
3291
CALL
Vanguard FTSE Developed Markets ETF
VEA
$227B
| $852K | ﹤0.01% |
17,000
-28,300
| -62% | -$1.37M |
|
3292
PUT
Harrow
HROW
$1.4B
| $849K | ﹤0.01% |
64,200
+11,100
| +21% | +$118K |
|
|
NARI
3293
PUT
DELISTED
Inari Medical, Inc. Common Stock
NARI
| $849K | ﹤0.01% |
17,700
+13,800
| +354% | +$737K |
|
|
CVSA
3294
PUT
Covista Inc
CVSA
$4.09B
| $848K | ﹤0.01% |
16,500
+14,800
| +871% | +$773K |
|
3295
PUT
Natural Resource Partners
NRP
$1.3B
| $846K | ﹤0.01% |
+9,200
| New | +$851K |
|
3296
FTI Consulting
FCN
$4.88B
| $844K | ﹤0.01% |
4,016
+3,004
| +297% | +$604K |
|
3297
PUT
Treace Medical Concepts
TMCI
$265M
| $844K | ﹤0.01% |
64,700
+3,000
| +5% | +$40K |
|
3298
PUT
B&G Foods
BGS
$291M
| $843K | ﹤0.01% |
73,700
-23,200
| -24% | -$243K |
|
3299
CALL
Immunovant
IMVT
$8.23B
| $840K | ﹤0.01% |
26,000
-2,000
| -7% | -$73K |
|
3300
CALL
Westlake Corp
WLK
$9.27B
| $840K | ﹤0.01% |
5,500
-9,300
| -63% | -$1.31M |
|
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.