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 | |
|---|---|---|---|---|---|---|
1201
Prologis
PLD
$138B
| $5.06M | 0.01% |
+49,794
| New | +$6.18M |
|
1202
CALL
Hertz
HTZ
$572M
| $5.06M | 0.01% |
315,300
+63,300
| +25% | +$1.19M |
|
1203
Lumen
LUMN
$6.53B
| $5.03M | 0.01% |
+690,960
| New | +$7.03M |
|
1204
CALL
Danaos Corp
DAC
$2.55B
| $5.03M | 0.01% |
90,300
-31,300
| -26% | -$2.08M |
|
1205
CALL
Copart
CPRT
$25.9B
| $5.02M | 0.01% |
188,800
+106,400
| +129% | +$3.17M |
|
|
DQ
1206
PUT
Daqo New Energy
DQ
$790M
| $5.02M | 0.01% |
94,600
+58,100
| +159% | +$3.71M |
|
1207
CALL
T. Rowe Price
TROW
$25B
| $5.01M | 0.01% |
47,700
+700
| +1% | +$83.5K |
|
|
SKX
1208
CALL
DELISTED
Skechers
SKX
| $5M | 0.01% |
157,800
+103,900
| +193% | +$3.89M |
|
1209
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27B
| $5M | 0.01% |
12,460
-4,437
| -26% | -$1.96M |
|
1210
Lam Research
LRCX
$382B
| $5M | 0.01% |
136,530
+31,630
| +30% | +$1.41M |
|
1211
CALL
BHP
BHP
$213B
| $4.99M | 0.01% |
160,500
-109,100
| -40% | -$5.78M |
|
1212
Moderna
MRNA
$21.5B
| $4.99M | 0.01% |
42,209
-38,828
| -48% | -$5.89M |
|
1213
CALL
Edwards Lifesciences
EW
$47.6B
| $4.99M | 0.01% |
60,400
-5,500
| -8% | -$529K |
|
|
SWAV
1214
PUT
DELISTED
Shockwave Medical, Inc. Common Stock
SWAV
| $4.98M | 0.01% |
17,900
+3,600
| +25% | +$915K |
|
1215
PUT
Relmada Therapeutics
RLMD
$544M
| $4.96M | 0.01% |
134,000
-23,900
| -15% | -$662K |
|
1216
CVS Health
CVS
$137B
| $4.96M | 0.01% |
+51,984
| New | +$5.15M |
|
|
TRQ
1217
CALL
DELISTED
Turquoise Hill Resources Ltd
TRQ
| $4.95M | 0.01% |
167,300
-8,400
| -5% | -$229K |
|
1218
PUT
Alnylam Pharmaceuticals
ALNY
$36.3B
| $4.94M | 0.01% |
24,700
+4,100
| +20% | +$782K |
|
1219
PUT
Polaris
PII
$4.15B
| $4.93M | 0.01% |
51,600
+44,200
| +597% | +$4.95M |
|
1220
CALL
Norfolk Southern
NSC
$78.8B
| $4.91M | 0.01% |
23,400
-7,200
| -24% | -$1.73M |
|
1221
CALL
BioCryst Pharmaceuticals
BCRX
$2.37B
| $4.9M | 0.01% |
388,700
+155,300
| +67% | +$2M |
|
1222
PUT
State Street
STT
$50.9B
| $4.89M | 0.01% |
80,400
-6,400
| -7% | -$437K |
|
1223
PUT
Ciena
CIEN
$55.3B
| $4.88M | 0.01% |
120,800
+61,600
| +104% | +$2.96M |
|
1224
PUT
H&R Block
HRB
$5.18B
| $4.88M | 0.01% |
114,800
-15,400
| -12% | -$652K |
|
1225
CALL
Monolithic Power Systems
MPWR
$65.5B
| $4.87M | 0.01% |
13,400
+5,800
| +76% | +$2.58M |
|
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.