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 | |
|---|---|---|---|---|---|---|
151
PUT
Nike
NKE
$62.5B
| $95.8M | 0.09% |
606,400
-11,700
| -2% | -$1.91M |
|
152
CALL
Snowflake
SNOW
$92.8B
| $95.7M | 0.09% |
404,100
+23,300
| +6% | +$6.63M |
|
153
CALL
Morgan Stanley
MS
$344B
| $94.7M | 0.09% |
1,029,400
+67,342
| +7% | +$6.67M |
|
|
SPLK
154
CALL
DELISTED
Splunk Inc
SPLK
| $94.2M | 0.09% |
668,000
+22,900
| +4% | +$3.33M |
|
|
PARA
155
PUT
DELISTED
Paramount Global Class B
PARA
| $93.1M | 0.09% |
2,070,900
+83,300
| +4% | +$3.39M |
|
156
PUT
iShares Silver Trust
SLV
$29.1B
| $93.1M | 0.09% |
3,861,000
-20,600
| -0.5% | -$463K |
|
|
DOCU
157
PUT
DocuSign
DOCU
$9.17B
| $93M | 0.09% |
334,400
+6,300
| +2% | +$1.82M |
|
158
CALL
Snap
SNAP
$7.6B
| $92.2M | 0.09% |
1,362,900
-85,900
| -6% | -$6.21M |
|
159
PUT
Deere & Co
DE
$163B
| $92.2M | 0.09% |
260,100
+5,200
| +2% | +$1.87M |
|
160
CALL
Direxion Daily Technology Bull 3x ETF
TECL
$5.64B
| $91.8M | 0.09% |
1,753,500
+9,600
| +0.6% | +$605K |
|
161
CALL
TSMC
TSM
$2.2T
| $91.8M | 0.09% |
775,500
-6,700
| -0.9% | -$787K |
|
162
PUT
AbbVie
ABBV
$453B
| $91.6M | 0.09% |
802,100
+3,800
| +0.5% | +$434K |
|
163
CALL
United Parcel Service
UPS
$99B
| $91.2M | 0.09% |
433,800
+17,500
| +4% | +$3.45M |
|
164
CALL
Johnson & Johnson
JNJ
$616B
| $91.1M | 0.09% |
548,700
-300
| -0.1% | -$51.2K |
|
165
CALL
Home Depot
HD
$332B
| $90.5M | 0.08% |
281,400
+1,400
| +0.5% | +$460K |
|
166
CALL
Verizon
VZ
$185B
| $90.5M | 0.08% |
1,607,300
+10,500
| +0.7% | +$581K |
|
167
CALL
General Motors
GM
$74.3B
| $89.2M | 0.08% |
1,509,300
-23,800
| -2% | -$1.26M |
|
168
PUT
Teladoc Health
TDOC
$1.63B
| $85.9M | 0.08% |
521,800
+7,600
| +1% | +$1.11M |
|
169
CALL
Lockheed Martin
LMT
$119B
| $85.7M | 0.08% |
225,500
+100
| +0% | +$36.2K |
|
170
CALL
Sea Limited
SE
$65B
| $85.6M | 0.08% |
314,300
+8,100
| +3% | +$2.49M |
|
171
PUT
Procter & Gamble
PG
$350B
| $85M | 0.08% |
628,500
+52,900
| +9% | +$7.5M |
|
172
CALL
IBM
IBM
$197B
| $84.9M | 0.08% |
604,483
+66,630
| +12% | +$8.91M |
|
173
PUT
Pinduoduo
PDD
$119B
| $84.7M | 0.08% |
694,800
+59,800
| +9% | +$5.82M |
|
174
CALL
Chevron
CVX
$382B
| $84.3M | 0.08% |
793,800
+34,200
| +5% | +$3.41M |
|
175
PUT
Novavax
NVAX
$1.33B
| $83.4M | 0.08% |
386,600
+1,500
| +0.4% | +$331K |
|
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.