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 | |
|---|---|---|---|---|---|---|
276
PUT
Comcast
CMCSA
$84B
| $49.1M | 0.05% |
1,404,200
-261,800
| -16% | -$8.66M |
|
277
PUT
GE Aerospace
GE
$354B
| $48.9M | 0.05% |
1,606,377
-574,302
| -26% | -$28.2M |
|
278
PUT
Valero Energy
VLO
$92.3B
| $48.5M | 0.05% |
382,500
-12,400
| -3% | -$1.56M |
|
279
PUT
Analog Devices
ADI
$188B
| $48.5M | 0.05% |
295,700
+12,700
| +4% | +$1.98M |
|
280
CALL
SLB Ltd
SLB
$71.3B
| $48.5M | 0.05% |
906,700
-650,100
| -42% | -$32.4M |
|
281
CALL
T-Mobile US
TMUS
$207B
| $48.4M | 0.05% |
345,700
+2,300
| +0.7% | +$330K |
|
282
CALL
ProShares UltraShort Health Care
RXD
$3.38M
| $48.4M | 0.05% |
1,001,200
-145,800
| -13% | -$3.7M |
|
283
PUT
Dollar General
DG
$26.5B
| $48.2M | 0.05% |
195,800
-6,100
| -3% | -$1.51M |
|
284
CALL
3M
MMM
$89.1B
| $47.9M | 0.05% |
477,682
-24,638
| -5% | -$2.51M |
|
285
PUT
Zoom
ZM
$25.2B
| $47.4M | 0.05% |
699,800
+221,500
| +46% | +$16.8M |
|
286
CALL
Amgen
AMGN
$198B
| $47.2M | 0.05% |
179,600
+30,000
| +20% | +$8.04M |
|
287
CALL
Verizon
VZ
$185B
| $47.2M | 0.05% |
1,196,800
-803,200
| -40% | -$30.3M |
|
288
CALL
Rio Tinto
RIO
$150B
| $46.3M | 0.05% |
649,800
-125,200
| -16% | -$7.86M |
|
289
CALL
Cigna
CI
$75.4B
| $46.3M | 0.05% |
139,600
-71,400
| -34% | -$22.6M |
|
290
PUT
Intuitive Surgical
ISRG
$121B
| $46.2M | 0.05% |
174,000
-24,100
| -12% | -$5.88M |
|
291
PUT
KLA
KLAC
$280B
| $45.5M | 0.05% |
1,208,000
+496,000
| +70% | +$17.3M |
|
|
292
AT&T
T
$160B
| $45.5M | 0.05% |
2,469,715
+2,469,615
| +2,469,615% | +$44.2M |
|
293
CALL
Altria Group
MO
$121B
| $45.4M | 0.05% |
992,500
-143,500
| -13% | -$6.5M |
|
|
SCHW
294
CALL
Charles Schwab
SCHW
$175B
| $45.2M | 0.05% |
542,500
-53,300
| -9% | -$4.14M |
|
295
PUT
Autodesk
ADSK
$43B
| $45.1M | 0.05% |
241,500
+118,400
| +96% | +$23.8M |
|
296
PUT
Baidu
BIDU
$36.6B
| $45.1M | 0.05% |
394,100
+148,700
| +61% | +$15.2M |
|
297
CALL
Rivian
RIVN
$24.9B
| $45.1M | 0.05% |
2,445,700
+663,200
| +37% | +$19.5M |
|
298
iShares China Large-Cap ETF
FXI
$4.29B
| $44.8M | 0.05% |
1,583,938
+2,387
| +0.2% | +$61.7K |
|
299
PUT
Diamondback Energy
FANG
$57.1B
| $44.4M | 0.05% |
325,300
+189,800
| +140% | +$27.7M |
|
300
PUT
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$254M
| $44.3M | 0.05% |
3,618,400
+54,000
| +2% | +$2.28M |
|
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.