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 | |
|---|---|---|---|---|---|---|
|
RDFN
2426
CALL
DELISTED
Redfin
RDFN
| $1.2M | ﹤0.01% |
132,300
+86,100
| +186% | +$642K |
|
2427
PUT
Royalty Pharma
RPRX
$26.1B
| $1.2M | ﹤0.01% |
33,200
-3,300
| -9% | -$122K |
|
2428
FIVE9
FIVN
$1.77B
| $1.19M | ﹤0.01% |
16,487
+5,090
| +45% | +$364K |
|
|
SOVO
2429
DELISTED
Sovos Brands, Inc. Common Stock
SOVO
| $1.19M | ﹤0.01% |
+71,419
| New | +$1M |
|
2430
Unum
UNM
$13.8B
| $1.19M | ﹤0.01% |
30,098
+21,444
| +248% | +$886K |
|
|
SAFE
2431
PUT
Safehold
SAFE
$1.19B
| $1.19M | ﹤0.01% |
52,600
+49,480
| +1,586% | +$2.48M |
|
2432
Direxion Daily Energy Bull 2X ETF
ERX
$249M
| $1.19M | ﹤0.01% |
20,363
-6,552
| -24% | -$411K |
|
|
CALY
2433
CALL
Callaway Golf Company
CALY
$3.26B
| $1.19M | ﹤0.01% |
54,900
-5,900
| -10% | -$134K |
|
2434
CALL
Evergy
EVRG
$20.1B
| $1.19M | ﹤0.01% |
19,400
+17,300
| +824% | +$1.05M |
|
2435
CALL
UGI
UGI
$8B
| $1.19M | ﹤0.01% |
34,100
+2,100
| +7% | +$79.6K |
|
|
NOVA
2436
CALL
DELISTED
Sunnova Energy
NOVA
| $1.18M | ﹤0.01% |
75,700
-4,200
| -5% | -$73.3K |
|
2437
CALL
Teucrium Agricultural Fund
TAGS
$19.6M
| $1.18M | ﹤0.01% |
103,600
-234,700
| -69% | -$7.22M |
|
|
MRTX
2438
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $1.18M | ﹤0.01% |
31,788
-2,700
| -8% | -$121K |
|
2439
PUT
YPF
YPF
$20.2B
| $1.18M | ﹤0.01% |
107,500
+11,100
| +12% | +$122K |
|
2440
PUT
Xerox
XRX
$337M
| $1.18M | ﹤0.01% |
76,600
-45,000
| -37% | -$727K |
|
2441
AppFolio
APPF
$5.85B
| $1.18M | ﹤0.01% |
+9,462
| New | +$1.14M |
|
2442
Burford Capital
BUR
$907M
| $1.18M | ﹤0.01% |
106,451
+92,396
| +657% | +$767K |
|
2443
CALL
AvalonBay Communities
AVB
$27.1B
| $1.18M | ﹤0.01% |
7,000
+4,200
| +150% | +$716K |
|
2444
PUT
WEC Energy
WEC
$37.7B
| $1.18M | ﹤0.01% |
12,400
+3,500
| +39% | +$324K |
|
2445
CALL
MBIA
MBI
$288M
| $1.17M | ﹤0.01% |
126,800
+57,100
| +82% | +$682K |
|
2446
PUT
Northern Trust
NTRS
$22.2B
| $1.17M | ﹤0.01% |
13,300
+12,100
| +1,008% | +$1.12M |
|
|
TSE
2447
PUT
DELISTED
Trinseo
TSE
| $1.17M | ﹤0.01% |
56,200
+55,400
| +6,925% | +$1.36M |
|
|
CUTR
2448
DELISTED
Cutera, Inc.
CUTR
| $1.17M | ﹤0.01% |
+49,494
| New | +$1.58M |
|
2449
PUT
Lumen
LUMN
$6.53B
| $1.17M | ﹤0.01% |
441,000
-526,300
| -54% | -$2.12M |
|
2450
PUT
Sunoco
SUN
$14.2B
| $1.17M | ﹤0.01% |
26,600
+6,300
| +31% | +$284K |
|
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.