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 | |
|---|---|---|---|---|---|---|
426
PUT
Hershey
HSY
$34.8B
| $30.3M | 0.03% |
119,000
+67,600
| +132% | +$15.9M |
|
427
CALL
DuPont de Nemours
DD
$17.8B
| $30.2M | 0.03% |
335,397
+116,871
| +53% | +$10.7M |
|
428
PUT
Colgate-Palmolive
CL
$70.8B
| $30.2M | 0.03% |
401,600
+82,700
| +26% | +$6.15M |
|
429
CALL
Cloudflare
NET
$99.3B
| $30.1M | 0.03% |
488,000
-127,500
| -21% | -$6.97M |
|
430
PUT
CF Industries
CF
$20.2B
| $30M | 0.03% |
414,300
-53,100
| -11% | -$4.34M |
|
431
PUT
Nucor
NUE
$59.2B
| $29.8M | 0.03% |
192,700
-84,800
| -31% | -$13.5M |
|
432
PUT
Arista Networks
ANET
$244B
| $29.6M | 0.03% |
704,800
+54,000
| +8% | +$1.86M |
|
433
PUT
Norwegian Cruise Line
NCLH
$7.15B
| $29.2M | 0.03% |
2,172,200
-146,400
| -6% | -$2.19M |
|
434
CALL
MGM Resorts International
MGM
$10.4B
| $29.1M | 0.03% |
654,900
+351,100
| +116% | +$14.6M |
|
435
PUT
Dollar General
DG
$29.4B
| $28.8M | 0.03% |
136,700
-59,100
| -30% | -$13.3M |
|
436
CALL
Energy Transfer Partners
ET
$74B
| $28.7M | 0.03% |
2,302,900
-905,600
| -28% | -$11.4M |
|
437
CALL
Lennar Class A
LEN
$20.1B
| $28.7M | 0.03% |
282,112
+180,052
| +176% | +$17.4M |
|
438
PUT
BHP
BHP
$230B
| $28.6M | 0.03% |
452,200
-88,400
| -16% | -$5.7M |
|
439
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$45.9B
| $28.6M | 0.03% |
85,834
+85,734
| +85,734% | +$28.5M |
|
440
CALL
Duke Energy
DUK
$93.7B
| $28.5M | 0.03% |
295,500
-400
| -0.1% | -$39.5K |
|
441
CALL
D.R. Horton
DHI
$39.9B
| $28.4M | 0.03% |
291,000
+77,800
| +36% | +$7.42M |
|
442
CALL
Akamai
AKAM
$15.1B
| $28.4M | 0.02% |
362,500
+105,100
| +41% | +$8.51M |
|
443
CALL
Burlington
BURL
$16.7B
| $28.3M | 0.02% |
140,200
+80,600
| +135% | +$17.6M |
|
444
PUT
Warner Bros
WBD
$70.8B
| $28.3M | 0.02% |
1,874,000
-79,600
| -4% | -$1.13M |
|
445
CALL
CarMax
KMX
$8.98B
| $28.2M | 0.02% |
438,300
+74,400
| +20% | +$4.98M |
|
446
PUT
Sarepta Therapeutics
SRPT
$2.38B
| $28.2M | 0.02% |
204,300
+171,900
| +531% | +$22.3M |
|
447
PUT
Tyson Foods
TSN
$18.1B
| $28.1M | 0.02% |
474,200
-105,100
| -18% | -$6.45M |
|
448
CALL
Cummins
CMI
$77.2B
| $28.1M | 0.02% |
117,600
-35,600
| -23% | -$8.69M |
|
449
PUT
GameStop
GME
$8.6B
| $28.1M | 0.02% |
1,219,600
-3,009,800
| -71% | -$59.9M |
|
450
CALL
DoorDash
DASH
$91.7B
| $28.1M | 0.02% |
441,700
-179,700
| -29% | -$10.3M |
|
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.