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 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
301
CALL
Electronic Arts
EA
$52.4B
| $44.1M | 0.05% |
361,000
+204,400
| +131% | +$25.7M |
|
302
PUT
Domino's
DPZ
$10.6B
| $44.1M | 0.05% |
127,200
+43,800
| +53% | +$15.3M |
|
303
CALL
Trade Desk
TTD
$8.26B
| $43.6M | 0.05% |
971,500
+314,900
| +48% | +$16M |
|
304
CALL
Las Vegas Sands
LVS
$30B
| $43.5M | 0.05% |
905,100
-85,600
| -9% | -$3.63M |
|
305
CALL
CVS Health
CVS
$138B
| $43.1M | 0.05% |
462,200
+51,600
| +13% | +$4.98M |
|
|
DOCU
306
PUT
DocuSign
DOCU
$9.14B
| $42.9M | 0.05% |
774,900
-166,000
| -18% | -$8.08M |
|
307
PUT
AutoZone
AZO
$48.5B
| $42.9M | 0.05% |
17,400
-33,100
| -66% | -$80M |
|
|
B
308
PUT
Barrick Mining
B
$62.8B
| $42.8M | 0.05% |
2,492,600
-183,800
| -7% | -$2.92M |
|
309
CALL
Blackstone
BX
$150B
| $42.7M | 0.05% |
575,000
+274,800
| +92% | +$23.7M |
|
310
PUT
ON Semiconductor
ON
$35.9B
| $42.5M | 0.05% |
681,100
+470,300
| +223% | +$31.4M |
|
311
CALL
DraftKings
DKNG
$11.3B
| $42.3M | 0.05% |
3,710,500
+2,310,300
| +165% | +$32.2M |
|
312
PUT
D.R. Horton
DHI
$40.4B
| $42.2M | 0.05% |
473,100
+118,500
| +33% | +$9.5M |
|
313
CALL
Zscaler
ZS
$23B
| $42M | 0.05% |
375,100
+188,000
| +100% | +$25.5M |
|
314
CALL
Roku
ROKU
$21.2B
| $41.9M | 0.05% |
1,030,500
+436,100
| +73% | +$22.8M |
|
315
PUT
Novartis
NVS
$292B
| $41.3M | 0.05% |
455,700
+157,800
| +53% | +$13.3M |
|
316
PUT
General Mills
GIS
$19.7B
| $41.3M | 0.04% |
492,100
-103,000
| -17% | -$8.39M |
|
317
CALL
Constellation Brands
STZ
$22.6B
| $41.2M | 0.04% |
177,600
+127,500
| +254% | +$30.5M |
|
318
CALL
Marvell Technology
MRVL
$189B
| $41.2M | 0.04% |
1,111,000
+146,800
| +15% | +$5.99M |
|
319
CALL
Regeneron Pharmaceuticals
REGN
$68.3B
| $41.1M | 0.04% |
56,900
+30,300
| +114% | +$22.4M |
|
320
PUT
Roblox
RBLX
$35.5B
| $40.8M | 0.04% |
1,433,200
-292,900
| -17% | -$10.3M |
|
321
CALL
Etsy
ETSY
$7.64B
| $40.6M | 0.04% |
339,000
+108,200
| +47% | +$12.4M |
|
322
PUT
ProShares UltraShort Health Care
RXD
$3.38M
| $40.5M | 0.04% |
674,200
-7,000
| -1% | -$178K |
|
323
PUT
Marathon Petroleum
MPC
$92.2B
| $40.5M | 0.04% |
347,800
+154,600
| +80% | +$17.6M |
|
|
324
PUT
Regeneron Pharmaceuticals
REGN
$68.3B
| $40.4M | 0.04% |
56,000
-700
| -1% | -$517K |
|
325
PUT
McKesson
MCK
$95.3B
| $40.3M | 0.04% |
107,400
+38,700
| +56% | +$14.4M |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.