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
|
+$113M |
| 2 |
SPDR Gold Trust
GLD
|
+$68.6M |
| 3 |
NVIDIA
NVDA
|
+$63.4M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$55.2M |
| 5 |
Apple
AAPL
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Netflix
NFLX
|
+$27.1M |
| 2 |
Qualcomm
QCOM
|
+$24.6M |
| 3 |
Walt Disney
DIS
|
+$21.2M |
| 4 |
Advanced Micro Devices
AMD
|
+$18.2M |
| 5 |
Snowflake
SNOW
|
+$16.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.44% |
| 2 | Consumer Discretionary | 0.32% |
| 3 | Healthcare | 0.22% |
| 4 | Financials | 0.17% |
| 5 | Communication Services | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
51
PUT
Bank of America
BAC
$430B
| $204M | 0.16% |
7,433,900
+1,523,200
| +26% | +$45.1M |
|
52
PUT
Goldman Sachs
GS
$320B
| $203M | 0.16% |
628,800
+4,100
| +0.7% | +$1.37M |
|
53
CALL
Citigroup
C
$223B
| $200M | 0.16% |
4,860,000
+2,833,400
| +140% | +$124M |
|
54
PUT
Costco
COST
$412B
| $198M | 0.16% |
350,700
+13,200
| +4% | +$7.29M |
|
55
CALL
Berkshire Hathaway Class B
BRK.B
$1.06T
| $196M | 0.15% |
560,600
+117,100
| +26% | +$41.5M |
|
56
CALL
Eli Lilly
LLY
$1.05T
| $196M | 0.15% |
364,700
+54,000
| +17% | +$27.8M |
|
57
PUT
Adobe
ADBE
$90.3B
| $194M | 0.15% |
463,600
-126,400
| -21% | -$66.3M |
|
58
PUT
Micron Technology
MU
$1.1T
| $186M | 0.15% |
2,740,200
+127,200
| +5% | +$8.52M |
|
59
PUT
State Street SPDR Portfolio Short Term Treasury ETF
SPTS
$6.07B
| $185M | 0.15% |
1,263,600
+321,600
| +34% | +$9.24M |
|
60
CALL
Salesforce
CRM
$139B
| $182M | 0.14% |
899,600
+42,400
| +5% | +$9.16M |
|
61
CALL
iShares Silver Trust
SLV
$28.4B
| $178M | 0.14% |
8,771,100
-1,299,200
| -13% | -$28.1M |
|
62
PUT
UnitedHealth
UNH
$396B
| $178M | 0.14% |
352,600
-13,600
| -4% | -$6.69M |
|
63
PUT
Coinbase
COIN
$46.3B
| $178M | 0.14% |
2,367,400
+284,200
| +14% | +$24M |
|
64
CALL
Oracle
ORCL
$366B
| $170M | 0.13% |
1,601,500
+127,500
| +9% | +$14.8M |
|
|
65
CALL
Goldman Sachs
GS
$320B
| $168M | 0.13% |
519,900
+51,100
| +11% | +$17.1M |
|
|
66
PUT
Walt Disney
DIS
$167B
| $168M | 0.13% |
2,073,600
+235,900
| +13% | +$20.1M |
|
67
CALL
Intel
INTC
$530B
| $164M | 0.13% |
4,618,300
-1,844,700
| -29% | -$64.3M |
|
|
68
CALL
Snowflake
SNOW
$94.2B
| $163M | 0.13% |
1,065,700
+130,700
| +14% | +$21.3M |
|
|
69
PUT
Intel
INTC
$530B
| $161M | 0.13% |
4,519,500
+1,269,900
| +39% | +$44.2M |
|
70
CALL
iShares Morningstar Value ETF
ILCV
$1.3B
| $158M | 0.12% |
2,389,700
+482,300
| +25% | +$32.4M |
|
71
PUT
TSMC
TSM
$2.2T
| $158M | 0.12% |
1,814,100
+234,700
| +15% | +$22.2M |
|
72
PUT
Palo Alto Networks
PANW
$279B
| $156M | 0.12% |
1,331,400
-335,600
| -20% | -$39.7M |
|
73
CALL
Chevron
CVX
$381B
| $155M | 0.12% |
917,300
+43,500
| +5% | +$7.03M |
|
74
PUT
Johnson & Johnson
JNJ
$603B
| $153M | 0.12% |
984,600
+35,100
| +4% | +$5.79M |
|
75
CALL
Nike
NKE
$63.7B
| $153M | 0.12% |
1,599,100
+393,100
| +33% | +$40.4M |
|
Similar funds
Simplex Trading's Q3 2023 Portfolio in Review
As of Q3 2023, Simplex Trading held 10,417 positions worth $127B, up 4.5% from $122B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading deployed $11.9B of net new capital in Q3 2023, opening 1,399 new positions and adding to 3,690 existing holdings. Its largest new stake was Amazon: 841,102 shares worth $107M.
By sector, the portfolio is most concentrated in Technology at 0.44% of assets, up from 0.41% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Netflix, an estimated $27.1M trimmed.
- Simplex Trading's largest Q3 2023 buy was Amazon: 841,102 shares worth $107M.
- Simplex Trading added most to SPDR Gold Trust in Q3 2023, an estimated $68.6M increase.
- Simplex Trading's biggest Q3 2023 reduction was Netflix, cutting an estimated $27.1M.
- Simplex Trading fully exited Qualcomm in Q3 2023, selling an estimated $24.6M.
- Simplex Trading's ten largest holdings make up 44% of its $127B portfolio in Q3 2023.
- Simplex Trading opened 1,399 new positions and closed 1,719 in Q3 2023.
- Simplex Trading's portfolio value rose 4.5% quarter-over-quarter to $127B.
Based on Simplex Trading's 13F filing for Q3 2023, filed 1 Nov 2023.