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 | |
|---|---|---|---|---|---|---|
2376
PUT
Autohome
ATHM
$2.43B
| $1.25M | ﹤0.01% |
37,500
-65,200
| -63% | -$2.2M |
|
2377
PUT
PPG Industries
PPG
$25.9B
| $1.25M | ﹤0.01% |
9,400
+2,200
| +31% | +$284K |
|
|
MAXN
2378
DELISTED
Maxeon Solar Technologies
MAXN
| $1.25M | ﹤0.01% |
472
+437
| +1,249% | +$931K |
|
2379
PUT
Banco Bradesco
BBD
$38.1B
| $1.25M | ﹤0.01% |
477,950
-39,223
| -8% | -$104K |
|
2380
CALL
Keurig Dr Pepper
KDP
$40.4B
| $1.25M | ﹤0.01% |
35,500
-56,400
| -61% | -$1.98M |
|
2381
CALL
RPC Inc
RES
$1.24B
| $1.25M | ﹤0.01% |
162,500
+159,100
| +4,679% | +$1.41M |
|
|
AKTS
2382
PUT
DELISTED
Akoustis Technologies Inc
AKTS
| $1.25M | ﹤0.01% |
+405,200
| New | +$1.41M |
|
2383
CALL
RLJ Lodging Trust
RLJ
$1.87B
| $1.25M | ﹤0.01% |
117,700
+117,500
| +58,750% | +$1.32M |
|
2384
PUT
Factset
FDS
$9.05B
| $1.25M | ﹤0.01% |
3,000
-200
| -6% | -$83.3K |
|
2385
PUT
Fastly Inc
FSLY
$3.17B
| $1.24M | ﹤0.01% |
70,100
+48,300
| +222% | +$614K |
|
2386
PUT
Omega Healthcare
OHI
$15.4B
| $1.24M | ﹤0.01% |
45,400
-800
| -2% | -$22.3K |
|
2387
CALL
Dole
DOLE
$1.35B
| $1.24M | ﹤0.01% |
105,700
+102,400
| +3,103% | +$1.15M |
|
|
BORR
2388
CALL
Borr Drilling
BORR
$1.31B
| $1.24M | ﹤0.01% |
163,500
+154,400
| +1,697% | +$995K |
|
2389
PUT
Amkor Technology
AMKR
$16.1B
| $1.24M | ﹤0.01% |
47,600
-47,300
| -50% | -$1.29M |
|
|
MASI
2390
CALL
DELISTED
Masimo
MASI
| $1.24M | ﹤0.01% |
6,700
+4,600
| +219% | +$776K |
|
2391
PureCycle Technologies
PCT
$1.17B
| $1.24M | ﹤0.01% |
+176,630
| New | +$1.23M |
|
2392
PUT
Brookfield
BN
$102B
| $1.24M | ﹤0.01% |
+84,000
| New | +$1.89M |
|
|
AZPN
2393
CALL
DELISTED
Aspen Technology Inc
AZPN
| $1.24M | ﹤0.01% |
5,400
+5,200
| +2,600% | +$1.08M |
|
|
HIBB
2394
PUT
DELISTED
Hibbett, Inc. Common Stock
HIBB
| $1.23M | ﹤0.01% |
20,900
+6,400
| +44% | +$430K |
|
2395
Navios Maritime Partners
NMM
$2.25B
| $1.23M | ﹤0.01% |
51,043
+21,739
| +74% | +$561K |
|
2396
Hims & Hers Health
HIMS
$6.5B
| $1.23M | ﹤0.01% |
124,089
+71,877
| +138% | +$630K |
|
2397
CALL
Hess Midstream
HESM
$5.22B
| $1.23M | ﹤0.01% |
42,400
+29,600
| +231% | +$862K |
|
2398
CALL
Louisiana-Pacific
LPX
$5.2B
| $1.23M | ﹤0.01% |
22,600
-43,800
| -66% | -$2.68M |
|
2399
PUT
Krystal Biotech
KRYS
$9.88B
| $1.22M | ﹤0.01% |
15,300
+13,300
| +665% | +$1.04M |
|
2400
CALL
Jackson Financial
JXN
$8.32B
| $1.22M | ﹤0.01% |
32,700
+10,100
| +45% | +$415K |
|
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.