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 | |
|---|---|---|---|---|---|---|
|
TGB
5251
CALL
Trekor Metals
TGB
$2.48B
| $138K | ﹤0.01% |
63,700
+40,900
| +179% | +$64.2K |
|
5252
CALL
Titan International
TWI
$466M
| $138K | ﹤0.01% |
11,100
+3,800
| +52% | +$52.2K |
|
|
PETQ
5253
PUT
DELISTED
PetIQ, Inc. Class A Common Stock
PETQ
| $138K | ﹤0.01% |
7,600
+6,200
| +443% | +$110K |
|
5254
DNOW Inc
DNOW
$2.58B
| $137K | ﹤0.01% |
+9,021
| New | +$109K |
|
5255
Gentex
GNTX
$4.97B
| $137K | ﹤0.01% |
+3,809
| New | +$132K |
|
5256
iShares S&P GSCI Commodity-Indexed Trust
GSG
$998M
| $137K | ﹤0.01% |
6,221
-2,718
| -30% | -$57.1K |
|
5257
CALL
Gray Television
GTN
$415M
| $137K | ﹤0.01% |
21,800
+16,600
| +319% | +$127K |
|
5258
CALL
Heritage Insurance Holdings
HRTG
$889M
| $137K | ﹤0.01% |
12,900
-31,500
| -71% | -$222K |
|
5259
PUT
Humacyte
HUMA
$176M
| $137K | ﹤0.01% |
44,300
-11,900
| -21% | -$40K |
|
|
IAS
5260
PUT
DELISTED
Integral Ad Science
IAS
| $137K | ﹤0.01% |
13,800
-1,300
| -9% | -$17.4K |
|
5261
CALL
Kimco Realty
KIM
$17.2B
| $137K | ﹤0.01% |
7,000
-116,800
| -94% | -$2.32M |
|
5262
PUT
MGP Ingredients
MGPI
$379M
| $137K | ﹤0.01% |
1,600
+900
| +129% | +$78K |
|
|
SLRN
5263
PUT
DELISTED
ACELYRIN
SLRN
| $137K | ﹤0.01% |
20,300
+14,600
| +256% | +$111K |
|
5264
Vanda Pharmaceuticals
VNDA
$307M
| $137K | ﹤0.01% |
33,347
+25,942
| +350% | +$104K |
|
5265
CALL
WPP
WPP
$4.36B
| $137K | ﹤0.01% |
2,900
-500
| -15% | -$23.6K |
|
|
LICY
5266
CALL
DELISTED
Li-Cycle Holdings Corp.
LICY
| $137K | ﹤0.01% |
16,738
-7,887
| -32% | -$35.5K |
|
5267
CALL
Alamo Group
ALG
$1.94B
| $136K | ﹤0.01% |
600
| – | – |
|
5268
PUT
Black Hills Corp
BKH
$5.42B
| $136K | ﹤0.01% |
2,500
-300
| -11% | -$15.7K |
|
5269
CALL
ClearPoint Neuro
CLPT
$448M
| $136K | ﹤0.01% |
20,100
+19,500
| +3,250% | +$136K |
|
5270
CALL
CorMedix
CRMD
$591M
| $136K | ﹤0.01% |
32,200
+21,800
| +210% | +$75.6K |
|
5271
CALL
The Ensign Group
ENSG
$10.4B
| $136K | ﹤0.01% |
1,100
-100
| -8% | -$12K |
|
5272
PUT
Jones Lang LaSalle
JLL
$16.3B
| $136K | ﹤0.01% |
700
-6,600
| -90% | -$1.2M |
|
5273
Upwork
UPWK
$1.13B
| $136K | ﹤0.01% |
11,164
-32,014
| -74% | -$436K |
|
|
GOLD
5274
PUT
Gold.com Inc
GOLD
$1.2B
| $135K | ﹤0.01% |
4,400
+3,900
| +780% | +$107K |
|
|
CMPS
5275
CALL
Compass Pathways
CMPS
$1.53B
| $135K | ﹤0.01% |
16,300
+2,800
| +21% | +$28.2K |
|
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.