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 |
Microsoft
MSFT
|
+$114M |
| 2 |
NVIDIA
NVDA
|
+$85.9M |
| 3 |
Citigroup
C
|
+$61.5M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.5M |
| 5 |
Pfizer
PFE
|
+$41.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$467M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$71.2M |
| 3 |
Meta Platforms (Facebook)
META
|
+$47.6M |
| 4 |
Intel
INTC
|
+$41.9M |
| 5 |
TSMC
TSM
|
+$35.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.51% |
| 2 | Financials | 0.35% |
| 3 | Consumer Discretionary | 0.3% |
| 4 | Healthcare | 0.25% |
| 5 | Industrials | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
FLNA
501
CALL
Filana Therapeutics
FLNA
$45M
| $20.7M | 0.02% |
494,300
+410,700
| +491% | +$11.1M |
|
|
X
502
PUT
DELISTED
US Steel
X
| $20.7M | 0.02% |
1,140,600
-1,292,700
| -53% | -$27.6M |
|
503
CALL
Charter Communications
CHTR
$15.6B
| $20.7M | 0.02% |
68,100
+44,800
| +192% | +$19.2M |
|
504
PUT
RTX Corp
RTX
$282B
| $20.6M | 0.02% |
251,800
-91,500
| -27% | -$8.28M |
|
505
PUT
Accenture
ACN
$84.9B
| $20.5M | 0.02% |
79,800
-36,800
| -32% | -$10.6M |
|
506
PUT
Darden Restaurants
DRI
$22.2B
| $20.5M | 0.02% |
162,400
-3,500
| -2% | -$437K |
|
507
CALL
Li Auto
LI
$12.3B
| $20.4M | 0.02% |
887,500
+144,400
| +19% | +$4.5M |
|
508
PUT
EOG Resources
EOG
$77.5B
| $20.4M | 0.02% |
182,700
-51,200
| -22% | -$5.75M |
|
509
PUT
Dollar Tree
DLTR
$22.6B
| $20.4M | 0.02% |
149,600
+25,500
| +21% | +$3.97M |
|
510
CALL
Spotify
SPOT
$96.4B
| $20.4M | 0.02% |
235,900
+38,100
| +19% | +$4.08M |
|
511
PUT
Estee Lauder
EL
$28.9B
| $20.3M | 0.02% |
94,000
+65,700
| +232% | +$16.8M |
|
512
PUT
APA Corp
APA
$12.9B
| $20.3M | 0.02% |
592,700
-75,100
| -11% | -$2.69M |
|
513
PUT
Nucor
NUE
$54.9B
| $20.3M | 0.02% |
189,400
-145,400
| -43% | -$18.2M |
|
|
ATVI
514
PUT
DELISTED
Activision Blizzard
ATVI
| $20.3M | 0.02% |
272,500
-205,200
| -43% | -$16.1M |
|
515
PUT
Antero Resources
AR
$10.9B
| $20.2M | 0.02% |
662,800
-51,700
| -7% | -$1.91M |
|
516
PUT
Southern Company
SO
$109B
| $20M | 0.02% |
294,200
+10,800
| +4% | +$818K |
|
517
CALL
Chewy
CHWY
$8.38B
| $20M | 0.02% |
651,000
+176,600
| +37% | +$7.01M |
|
518
PUT
Datadog
DDOG
$87B
| $19.9M | 0.02% |
224,600
-204,000
| -48% | -$20.5M |
|
519
CALL
HubSpot
HUBS
$9.73B
| $19.9M | 0.02% |
73,500
+54,200
| +281% | +$17.2M |
|
520
PUT
Medtronic
MDT
$105B
| $19.8M | 0.02% |
245,100
+75,200
| +44% | +$6.76M |
|
521
CALL
Williams-Sonoma
WSM
$25.7B
| $19.8M | 0.02% |
335,200
+302,800
| +935% | +$21.5M |
|
522
CALL
Autodesk
ADSK
$43.3B
| $19.5M | 0.02% |
104,300
+17,500
| +20% | +$3.54M |
|
523
PUT
Marriott International
MAR
$96.1B
| $19.4M | 0.02% |
138,300
-20,700
| -13% | -$3.16M |
|
524
PUT
GSK
GSK
$102B
| $19.3M | 0.02% |
749,500
+546,940
| +270% | +$20.7M |
|
525
PUT
Marathon Petroleum
MPC
$91.2B
| $19.2M | 0.02% |
193,200
-55,400
| -22% | -$5.19M |
|
Similar funds
Simplex Trading's Q3 2022 Portfolio in Review
As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.
By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.
- Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
- Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
- Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
- Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
- Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
- Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
- Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.
Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.