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 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3201
PUT
Main Street Capital
MAIN
$5.02B
| $532K | ﹤0.01% |
13,500
+10,300
| +322% | +$406K |
|
3202
CALL
Sprouts Farmers Market
SFM
$7.25B
| $532K | ﹤0.01% |
15,200
-17,400
| -53% | -$563K |
|
3203
PUT
Teekay Tankers
TNK
$2.6B
| $532K | ﹤0.01% |
12,400
+9,500
| +328% | +$352K |
|
3204
PUT
Cognyte Software
CGNT
$644M
| $531K | ﹤0.01% |
156,700
| – | – |
|
|
VISN
3205
PUT
Vistance Networks Inc
VISN
$2.66B
| $531K | ﹤0.01% |
83,500
+82,600
| +9,178% | +$626K |
|
3206
CALL
Acadia Pharmaceuticals
ACAD
$4.4B
| $530K | ﹤0.01% |
28,200
-13,800
| -33% | -$263K |
|
3207
BioCryst Pharmaceuticals
BCRX
$2.49B
| $528K | ﹤0.01% |
63,313
+23,231
| +58% | +$224K |
|
3208
Cloudflare
NET
$93.9B
| $528K | ﹤0.01% |
+8,570
| New | +$469K |
|
3209
CALL
Amplify Energy
AMPY
$157M
| $526K | ﹤0.01% |
76,600
+13,200
| +21% | +$108K |
|
3210
CALL
Atossa Therapeutics
ATOS
$23.8M
| $526K | ﹤0.01% |
48,453
+18,660
| +63% | +$208K |
|
|
TIGR
3211
PUT
UP Fintech Holding
TIGR
$865M
| $526K | ﹤0.01% |
158,200
-92,500
| -37% | -$341K |
|
|
PDCE
3212
CALL
DELISTED
PDC Energy, Inc.
PDCE
| $526K | ﹤0.01% |
8,200
-8,900
| -52% | -$576K |
|
3213
RPM International
RPM
$13.8B
| $525K | ﹤0.01% |
6,025
+4,741
| +369% | +$415K |
|
3214
Anavex Life Sciences
AVXL
$234M
| $524K | ﹤0.01% |
+61,205
| New | +$611K |
|
|
CHX
3215
DELISTED
ChampionX
CHX
| $524K | ﹤0.01% |
19,330
+16,641
| +619% | +$497K |
|
3216
CALL
DocGo
DCGO
$61.8M
| $524K | ﹤0.01% |
60,600
+31,400
| +108% | +$277K |
|
3217
Varonis Systems
VRNS
$5.35B
| $524K | ﹤0.01% |
20,168
+7,474
| +59% | +$195K |
|
3218
CALL
Federal Realty Investment Trust
FRT
$11B
| $523K | ﹤0.01% |
5,300
+1,100
| +26% | +$115K |
|
3219
PUT
StoneCo
STNE
$2.65B
| $523K | ﹤0.01% |
54,900
-19,800
| -27% | -$189K |
|
3220
PUT
AMN Healthcare
AMN
$1.31B
| $522K | ﹤0.01% |
6,300
+5,100
| +425% | +$480K |
|
3221
PUT
HealthEquity
HQY
$8.33B
| $522K | ﹤0.01% |
8,900
-9,500
| -52% | -$577K |
|
|
NVMI
3222
CALL
Nova
NVMI
$13.3B
| $522K | ﹤0.01% |
5,000
+3,600
| +257% | +$337K |
|
3223
CALL
Remitly
RELY
$4.83B
| $522K | ﹤0.01% |
30,800
+14,600
| +90% | +$199K |
|
3224
Rayonier Advanced Materials
RYAM
$575M
| $522K | ﹤0.01% |
+83,337
| New | +$581K |
|
3225
BigBear.ai
BBAI
$1.35B
| $521K | ﹤0.01% |
213,897
+197,209
| +1,182% | +$526K |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.