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 |
GE Aerospace
GE
|
+$36M |
| 2 |
Advanced Micro Devices
AMD
|
+$19.4M |
| 3 |
iShares MSCI EAFE ETF
EFA
|
+$10.2M |
| 4 |
Micron Technology
MU
|
+$6.31M |
| 5 |
Alibaba
BABA
|
+$6.19M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$25.9M |
| 2 |
SPDR Gold Trust
GLD
|
+$15.3M |
| 3 |
Amazon
AMZN
|
+$9.53M |
| 4 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$9.03M |
| 5 |
State Street Technology Select Sector SPDR ETF
XLK
|
+$7.73M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.49% |
| 2 | Consumer Discretionary | 0.39% |
| 3 | Communication Services | 0.27% |
| 4 | Healthcare | 0.25% |
| 5 | Financials | 0.25% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
ATVI
201
PUT
DELISTED
Activision Blizzard
ATVI
| $69.2M | 0.06% |
736,500
+119,300
| +19% | +$9.97M |
|
202
CALL
Teladoc Health
TDOC
$1.63B
| $69M | 0.06% |
418,800
+25,700
| +7% | +$3.74M |
|
203
CALL
Procter & Gamble
PG
$350B
| $68.9M | 0.06% |
509,700
+3,400
| +0.7% | +$482K |
|
204
PUT
VanEck Durable High Dividend ETF
DURA
$38.4M
| $68.6M | 0.06% |
323,600
+17,700
| +6% | +$559K |
|
205
PUT
Morgan Stanley
MS
$344B
| $68.4M | 0.06% |
743,224
+4,026
| +0.5% | +$399K |
|
206
PUT
Expedia Group
EXPE
$31.9B
| $68.4M | 0.06% |
409,400
+41,600
| +11% | +$6.43M |
|
207
PUT
Biogen
BIIB
$29.8B
| $67.4M | 0.06% |
193,100
+3,600
| +2% | +$1.18M |
|
208
PUT
UnitedHealth
UNH
$393B
| $66.9M | 0.06% |
165,300
+6,100
| +4% | +$2.53M |
|
209
PUT
Oracle
ORCL
$363B
| $66.4M | 0.06% |
834,900
+11,500
| +1% | +$1.02M |
|
210
PUT
Chewy
CHWY
$8.76B
| $65.6M | 0.06% |
812,900
+9,100
| +1% | +$753K |
|
211
CALL
AbbVie
ABBV
$453B
| $64.8M | 0.06% |
566,800
-22,200
| -4% | -$2.54M |
|
212
CALL
Palantir
PLTR
$304B
| $64.7M | 0.06% |
2,617,100
+77,300
| +3% | +$1.89M |
|
213
PUT
Strategy Inc
MSTR
$36.1B
| $63.8M | 0.06% |
981,000
+84,000
| +9% | +$5.39M |
|
214
CALL
RTX Corp
RTX
$263B
| $62.3M | 0.06% |
730,534
-48,464
| -6% | -$4.14M |
|
|
215
CALL
Oracle
ORCL
$363B
| $61.1M | 0.06% |
768,100
+10,000
| +1% | +$883K |
|
216
CALL
Texas Instruments
TXN
$269B
| $60.3M | 0.06% |
315,800
+5,600
| +2% | +$1.07M |
|
217
CALL
Intuitive Surgical
ISRG
$122B
| $59.5M | 0.06% |
192,300
+600
| +0.3% | +$201K |
|
218
CALL
Western Digital
WDC
$194B
| $59M | 0.06% |
1,102,324
+41,807
| +4% | +$1.99M |
|
219
PUT
Mercado Libre
MELI
$91.6B
| $58.4M | 0.05% |
37,800
+1,200
| +3% | +$2.08M |
|
220
PUT
Ford
F
$57.6B
| $58M | 0.05% |
3,892,700
+17,100
| +0.4% | +$233K |
|
221
PUT
Freeport-McMoran
FCX
$93.4B
| $57.8M | 0.05% |
1,558,000
+13,000
| +0.8% | +$458K |
|
222
CALL
Bilibili
BILI
$7.4B
| $57.7M | 0.05% |
476,100
+600
| +0.1% | +$51.3K |
|
223
PUT
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$156M
| $57.3M | 0.05% |
123,556
+8,331
| +7% | +$3.73M |
|
224
CALL
Starbucks
SBUX
$119B
| $57M | 0.05% |
502,900
-9,200
| -2% | -$1.08M |
|
225
PUT
Roblox
RBLX
$36.1B
| $56.5M | 0.05% |
658,100
+33,500
| +5% | +$2.75M |
|
Similar funds
Simplex Trading's Q3 2021 Portfolio in Review
As of Q3 2021, Simplex Trading held 10,062 positions worth $107B, up 3.4% from $104B the previous quarter. Its ten largest holdings account for 41% of the portfolio.
Trading was light in Q3 2021: portfolio turnover was 3.5%. Simplex Trading opened 86 new positions and exited 271, leaving the 10,062-position portfolio largely intact.
By sector, the portfolio is most concentrated in Technology at 0.49% of assets, up from 0.47% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q3 2021 buy was Olo Inc: 143,230 shares worth $4.91M.
- Simplex Trading added most to GE Aerospace in Q3 2021, an estimated $36M increase.
- Simplex Trading's biggest Q3 2021 reduction was NVIDIA, cutting an estimated $25.9M.
- Simplex Trading fully exited Amazon in Q3 2021, selling an estimated $9.53M.
- Simplex Trading's ten largest holdings make up 41% of its $107B portfolio in Q3 2021.
- Simplex Trading opened 86 new positions and closed 271 in Q3 2021.
- Simplex Trading's portfolio value rose 3.4% quarter-over-quarter to $107B.
Based on Simplex Trading's 13F filing for Q3 2021, filed 28 Oct 2021.