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 | |
|---|---|---|---|---|---|---|
|
HZNP
326
PUT
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $40.3M | 0.04% |
353,900
+304,200
| +612% | +$25.3M |
|
327
PUT
Twilio
TWLO
$27.8B
| $40.1M | 0.04% |
819,200
+545,000
| +199% | +$31M |
|
328
PUT
CF Industries
CF
$19.6B
| $39.8M | 0.04% |
467,400
+189,200
| +68% | +$19.2M |
|
329
PUT
Strategy Inc
MSTR
$36.3B
| $39.7M | 0.04% |
2,803,000
+785,000
| +39% | +$16M |
|
330
PUT
Workday
WDAY
$32.7B
| $39.4M | 0.04% |
235,400
-47,500
| -17% | -$7.41M |
|
331
PUT
Medtronic
MDT
$105B
| $39.2M | 0.04% |
505,000
+259,900
| +106% | +$21.1M |
|
332
PUT
EQT Corp
EQT
$33.8B
| $39.2M | 0.04% |
1,160,000
+265,200
| +30% | +$10.6M |
|
333
PUT
Accenture
ACN
$85.7B
| $39.2M | 0.04% |
146,900
+67,100
| +84% | +$18.6M |
|
334
PUT
Delta Air Lines
DAL
$54.9B
| $39.2M | 0.04% |
1,192,800
+53,900
| +5% | +$1.79M |
|
335
CALL
American Express
AXP
$238B
| $39.2M | 0.04% |
265,000
-30,600
| -10% | -$4.53M |
|
336
PUT
3M
MMM
$89.1B
| $39M | 0.04% |
388,939
-49,873
| -11% | -$5.09M |
|
|
B
337
CALL
Barrick Mining
B
$62.8B
| $38.9M | 0.04% |
2,263,800
-13,000
| -0.6% | -$207K |
|
338
Procter & Gamble
PG
$347B
| $38.8M | 0.04% |
256,289
+207,339
| +424% | +$29.1M |
|
|
339
Meta Platforms (Facebook)
META
$1.59T
| $38.6M | 0.04% |
321,096
+315,726
| +5,879% | +$37.1M |
|
|
X
340
CALL
DELISTED
US Steel
X
| $38.4M | 0.04% |
1,532,800
-20,300
| -1% | -$468K |
|
341
PUT
Gilead Sciences
GILD
$162B
| $38.3M | 0.04% |
445,900
-3,200
| -0.7% | -$253K |
|
342
PUT
Dow Inc
DOW
$22.5B
| $38.2M | 0.04% |
758,600
-28,100
| -4% | -$1.37M |
|
343
CALL
Energy Transfer Partners
ET
$70.1B
| $38.1M | 0.04% |
3,208,500
-649,800
| -17% | -$7.79M |
|
344
PUT
Trade Desk
TTD
$8.26B
| $37.8M | 0.04% |
842,100
-232,600
| -22% | -$11.8M |
|
345
CALL
RTX Corp
RTX
$262B
| $37.7M | 0.04% |
373,400
-85,700
| -19% | -$8.06M |
|
346
CALL
Blackrock
BLK
$164B
| $37.6M | 0.04% |
53,100
+34,200
| +181% | +$22.8M |
|
347
CALL
Wynn Resorts
WYNN
$9.79B
| $37.6M | 0.04% |
455,700
+30,200
| +7% | +$2.21M |
|
348
PUT
Roku
ROKU
$21.2B
| $37.4M | 0.04% |
918,300
-10,400
| -1% | -$543K |
|
349
CALL
Cummins
CMI
$91.2B
| $37.1M | 0.04% |
153,200
+88,900
| +138% | +$21.1M |
|
350
PUT
DraftKings
DKNG
$11.3B
| $37M | 0.04% |
3,250,200
-568,200
| -15% | -$7.91M |
|
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.