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 | |
|---|---|---|---|---|---|---|
2276
CALL
SoundHound AI
SOUN
$2.68B
| $1.39M | ﹤0.01% |
502,200
+454,000
| +942% | +$1.07M |
|
|
MRTX
2277
PUT
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $1.39M | ﹤0.01% |
37,300
-32,300
| -46% | -$1.45M |
|
2278
PUT
Quaker Houghton
KWR
$2.63B
| $1.39M | ﹤0.01% |
7,000
-1,700
| -20% | -$325K |
|
2279
CALL
Jabil
JBL
$32.8B
| $1.38M | ﹤0.01% |
15,700
-19,500
| -55% | -$1.57M |
|
2280
CALL
Patrick Industries
PATK
$2.8B
| $1.38M | ﹤0.01% |
30,150
+26,400
| +704% | +$1.22M |
|
2281
Stellantis
STLA
$16.5B
| $1.38M | ﹤0.01% |
76,079
+42,239
| +125% | +$705K |
|
2282
Under Armour
UAA
$3B
| $1.38M | ﹤0.01% |
+145,670
| New | +$1.51M |
|
2283
PUT
Taylor Morrison
TMHC
| $1.38M | ﹤0.01% |
36,100
-7,200
| -17% | -$253K |
|
2284
Hyatt Hotels
H
$17.6B
| $1.38M | ﹤0.01% |
+12,318
| New | +$1.35M |
|
|
2285
PUT
Patrick Industries
PATK
$2.8B
| $1.38M | ﹤0.01% |
30,000
+29,550
| +6,567% | +$1.37M |
|
|
MDC
2286
DELISTED
M.D.C. Holdings, Inc.
MDC
| $1.37M | ﹤0.01% |
35,357
+35,353
| +883,825% | +$1.31M |
|
2287
LPL Financial
LPLA
$26.3B
| $1.37M | ﹤0.01% |
6,788
+5,815
| +598% | +$1.33M |
|
2288
PUT
Blue Owl Capital
OWL
$6.39B
| $1.37M | ﹤0.01% |
124,000
-105,100
| -46% | -$1.26M |
|
2289
CALL
Sabre
SABR
$656M
| $1.37M | ﹤0.01% |
320,200
-280,200
| -47% | -$1.6M |
|
2290
PUT
Toast
TOST
$16.8B
| $1.37M | ﹤0.01% |
77,300
-72,600
| -48% | -$1.43M |
|
2291
CALL
Olin
OLN
$2.64B
| $1.37M | ﹤0.01% |
24,700
+13,200
| +115% | +$756K |
|
|
BBBY
2292
PUT
DELISTED
Bed Bath & Beyond Inc
BBBY
| $1.37M | ﹤0.01% |
3,205,700
+327,000
| +11% | +$674K |
|
|
ASRT
2293
PUT
DELISTED
Assertio
ASRT
| $1.37M | ﹤0.01% |
14,333
+14,186
| +9,650% | +$1.07M |
|
2294
CALL
Civeo
CVEO
$379M
| $1.37M | ﹤0.01% |
+66,300
| New | +$1.89M |
|
2295
PUT
Sonos
SONO
$1.75B
| $1.37M | ﹤0.01% |
69,700
-50,700
| -42% | -$967K |
|
2296
Dolby
DLB
$4.72B
| $1.37M | ﹤0.01% |
+15,993
| New | +$1.29M |
|
2297
Cencora
COR
$60.3B
| $1.36M | ﹤0.01% |
8,521
-10,023
| -54% | -$1.59M |
|
2298
ICL Group
ICL
$6.81B
| $1.36M | ﹤0.01% |
200,402
+41,809
| +26% | +$309K |
|
2299
CALL
Krystal Biotech
KRYS
$9.88B
| $1.36M | ﹤0.01% |
17,000
+16,400
| +2,733% | +$1.29M |
|
2300
CALL
AMN Healthcare
AMN
$1.28B
| $1.36M | ﹤0.01% |
16,400
+8,800
| +116% | +$828K |
|
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.