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 | Miscellaneous | 98.51% |
| 2 | Technology | 0.42% |
| 3 | Consumer Discretionary | 0.2% |
| 4 | Healthcare | 0.17% |
| 5 | Industrials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1276
PUT
Applovin
APP
$107B
| $5.22M | ﹤0.01% |
331,200
+44,900
| +16% | +$589K |
|
1277
CALL
Penumbra
PEN
$12.7B
| $5.21M | ﹤0.01% |
18,700
+18,600
| +18,600% | +$4.75M |
|
1278
Pan American Silver
PAAS
$21.3B
| $5.2M | ﹤0.01% |
285,842
+112,919
| +65% | +$1.94M |
|
1279
PUT
Diageo
DEO
$49.6B
| $5.2M | ﹤0.01% |
28,700
+2,000
| +7% | +$353K |
|
|
MORF
1280
CALL
DELISTED
Morphic Holding, Inc. Common Stock
MORF
| $5.19M | ﹤0.01% |
+137,900
| New | +$5.08M |
|
1281
CALL
National Grid
NGG
$78.5B
| $5.18M | ﹤0.01% |
80,862
+64,626
| +398% | +$3.87M |
|
1282
CALL
Western Union
WU
$2.24B
| $5.17M | ﹤0.01% |
464,100
-239,500
| -34% | -$3.12M |
|
1283
PUT
TFI International
TFII
$11.3B
| $5.17M | ﹤0.01% |
43,300
+43,200
| +43,200% | +$5.03M |
|
1284
Medtronic
MDT
$120B
| $5.14M | ﹤0.01% |
63,778
-109,727
| -63% | -$8.94M |
|
1285
PUT
Riot Platforms
RIOT
$8.18B
| $5.14M | ﹤0.01% |
514,200
-463,500
| -47% | -$3.01M |
|
1286
CALL
Academy Sports + Outdoors
ASO
$2.79B
| $5.12M | ﹤0.01% |
78,500
-2,300
| -3% | -$135K |
|
1287
CALL
Zebra Technologies
ZBRA
$17.2B
| $5.12M | ﹤0.01% |
16,100
+7,700
| +92% | +$2.33M |
|
1288
British American Tobacco
BTI
$119B
| $5.11M | ﹤0.01% |
145,498
+78,275
| +116% | +$2.95M |
|
1289
CALL
Qorvo
QRVO
$9.07B
| $5.11M | ﹤0.01% |
50,300
-18,200
| -27% | -$1.85M |
|
1290
CALL
TC Energy
TRP
$65.2B
| $5.11M | ﹤0.01% |
131,300
+62,700
| +91% | +$2.55M |
|
1291
CALL
Public Storage
PSA
$55.6B
| $5.11M | ﹤0.01% |
16,900
+12,200
| +260% | +$3.59M |
|
1292
PUT
Mobileye
MBLY
$7.28B
| $5.1M | ﹤0.01% |
117,900
+29,700
| +34% | +$1.16M |
|
1293
Tyson Foods
TSN
$18.1B
| $5.1M | ﹤0.01% |
+85,992
| New | +$5.28M |
|
1294
CALL
First Majestic Silver
AG
$10.3B
| $5.1M | ﹤0.01% |
707,400
-152,800
| -18% | -$1.13M |
|
1295
PUT
SL Green Realty
SLG
$3.94B
| $5.09M | ﹤0.01% |
216,400
+194,300
| +879% | +$6.55M |
|
|
TYNS
1296
CALL
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $5.08M | ﹤0.01% |
86,600
+4,600
| +6% | +$270K |
|
|
FYBR
1297
CALL
DELISTED
Frontier Communications
FYBR
| $5.07M | ﹤0.01% |
222,800
+171,700
| +336% | +$4.6M |
|
|
CTLT
1298
CALL
DELISTED
CATALENT, INC.
CTLT
| $5.07M | ﹤0.01% |
77,200
+33,700
| +77% | +$2.08M |
|
1299
PUT
Dropbox
DBX
$7.57B
| $5.06M | ﹤0.01% |
234,000
+150,000
| +179% | +$3.29M |
|
1300
STMicroelectronics
STM
$46.6B
| $5.04M | ﹤0.01% |
94,292
+40,574
| +76% | +$1.89M |
|
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's Q1 2023 filing shows 1,536 new, 3,663 increased, 3,631 reduced and 1,728 closed positions. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M. The largest sale was Amazon, an estimated $189M.
By sector, the portfolio is most concentrated in Miscellaneous at 99% of assets, up from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- 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 1,728 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.