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 | |
|---|---|---|---|---|---|---|
|
NVEE
4276
CALL
DELISTED
NV5 Global
NVEE
| $207K | ﹤0.01% |
8,000
| – | – |
|
4277
PUT
Opko Health
OPK
$1.23B
| $207K | ﹤0.01% |
142,300
| – | – |
|
4278
PUT
Radian Group
RDN
$5.22B
| $207K | ﹤0.01% |
9,400
+4,100
| +77% | +$87.3K |
|
|
ALLG
4279
CALL
DELISTED
Allego N.V.
ALLG
| $207K | ﹤0.01% |
86,200
+82,900
| +2,512% | +$303K |
|
|
LAND
4280
CALL
Gladstone Land Corp
LAND
$366M
| $206K | ﹤0.01% |
12,400
-100
| -0.8% | -$1.81K |
|
4281
PUT
Procore
PCOR
$7.37B
| $206K | ﹤0.01% |
3,300
+1,300
| +65% | +$76K |
|
4282
Radiant Logistics
RLGT
$411M
| $206K | ﹤0.01% |
31,458
+23,221
| +282% | +$130K |
|
|
THS
4283
CALL
DELISTED
Treehouse Foods
THS
| $206K | ﹤0.01% |
4,100
-66,500
| -94% | -$3.22M |
|
4284
American Vanguard Corp
AVD
$74.1M
| $205K | ﹤0.01% |
9,389
-3,714
| -28% | -$80K |
|
4285
PUT
Kimbell Royalty Partners
KRP
$1.43B
| $205K | ﹤0.01% |
13,500
-22,300
| -62% | -$349K |
|
4286
PUT
Qfin Holdings
QFIN
$1.66B
| $205K | ﹤0.01% |
10,600
-452,300
| -98% | -$9.48M |
|
4287
Sphere Entertainment
SPHR
$5.06B
| $205K | ﹤0.01% |
3,477
-5,027
| -59% | -$272K |
|
4288
CALL
United States 12 Month Oil Fund,
USL
$43.5M
| $205K | ﹤0.01% |
6,100
-100
| -2% | -$3.39K |
|
4289
Vuzix
VUZI
$187M
| $205K | ﹤0.01% |
+49,622
| New | +$223K |
|
|
ARGO
4290
CALL
DELISTED
Argo Group International Holdings, Ltd.
ARGO
| $205K | ﹤0.01% |
+7,000
| New | +$198K |
|
4291
CALL
Breakwave Dry Bulk Shipping ETF
BDRY
$27.7M
| $204K | ﹤0.01% |
+20,200
| New | +$176K |
|
4292
CALL
Eos Energy Enterprises
EOSE
$1.22B
| $204K | ﹤0.01% |
79,600
+20,900
| +36% | +$36.3K |
|
4293
CALL
Paysign
PAYS
$510M
| $204K | ﹤0.01% |
56,400
-11,900
| -17% | -$40.7K |
|
4294
CALL
Pathward Financial
CASH
$1.87B
| $203K | ﹤0.01% |
+4,900
| New | +$231K |
|
4295
CALL
Cooper-Standard Automotive
CPS
$526M
| $203K | ﹤0.01% |
14,300
-8,000
| -36% | -$117K |
|
4296
CALL
1-800-Flowers.com
FLWS
$254M
| $203K | ﹤0.01% |
17,700
+8,900
| +101% | +$91K |
|
|
HUYA
4297
PUT
Huya Inc
HUYA
$561M
| $203K | ﹤0.01% |
56,500
+39,700
| +236% | +$187K |
|
4298
iShares Core S&P Small-Cap ETF
IJR
$110B
| $203K | ﹤0.01% |
+2,102
| New | +$210K |
|
4299
PUT
Neogen
NEOG
$2B
| $203K | ﹤0.01% |
11,000
+5,100
| +86% | +$95.9K |
|
|
DOC
4300
PUT
DELISTED
PHYSICIANS REALTY TRUST
DOC
| $203K | ﹤0.01% |
13,600
-7,600
| -36% | -$115K |
|
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.