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 | |
|---|---|---|---|---|---|---|
3276
CALL
CNX Resources
CNX
$4.77B
| $557K | ﹤0.01% |
24,700
-22,600
| -48% | -$468K |
|
3277
CALL
News Corp Class B
NWS
$16.7B
| $557K | ﹤0.01% |
27,800
-900
| -3% | -$18.6K |
|
3278
Signet Jewelers
SIG
$3.72B
| $557K | ﹤0.01% |
7,765
+1,073
| +16% | +$79.6K |
|
3279
PUT
Toro Company
TTC
$9.01B
| $556K | ﹤0.01% |
6,700
+6,100
| +1,017% | +$588K |
|
|
HAPN
3280
CALL
Happen Inc
HAPN
$2.16B
| $553K | ﹤0.01% |
90,800
+64,300
| +243% | +$500K |
|
3281
Spotify
SPOT
$102B
| $553K | ﹤0.01% |
3,582
-77,865
| -96% | -$11.9M |
|
3282
CALL
Atmus Filtration Technologies
ATMU
$4.43B
| $552K | ﹤0.01% |
+26,500
| New | +$607K |
|
3283
PUT
Copa Holdings
CPA
$5.65B
| $552K | ﹤0.01% |
6,200
-900
| -13% | -$93.5K |
|
3284
CALL
Huntington Ingalls Industries
HII
$11.4B
| $552K | ﹤0.01% |
2,700
-1,500
| -36% | -$331K |
|
3285
Amplify Junior Silver Miners ETF
SILJ
$3.29B
| $552K | ﹤0.01% |
65,101
-31,691
| -33% | -$299K |
|
3286
CALL
Spire Global
SPIR
$432M
| $551K | ﹤0.01% |
112,800
+104,250
| +1,219% | +$541K |
|
|
NKLA
3287
DELISTED
Nikola Corporation Common Stock
NKLA
| $550K | ﹤0.01% |
11,690
+11,671
| +61,426% | +$607K |
|
3288
PUT
Modine Manufacturing
MOD
$12.2B
| $549K | ﹤0.01% |
12,000
+11,500
| +2,300% | +$482K |
|
3289
CALL
Option Care Health
OPCH
$3.42B
| $549K | ﹤0.01% |
17,000
-82,400
| -83% | -$2.78M |
|
3290
WEC Energy
WEC
$37.1B
| $549K | ﹤0.01% |
+6,818
| New | +$592K |
|
3291
Zimmer Biomet
ZBH
$17.8B
| $549K | ﹤0.01% |
4,900
-3,451
| -41% | -$438K |
|
|
LGF.B
3292
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
| $549K | ﹤0.01% |
69,810
+16,749
| +32% | +$126K |
|
3293
PUT
Howard Hughes
HHH
$3.93B
| $548K | ﹤0.01% |
7,763
+7,658
| +7,293% | +$578K |
|
3294
PUT
Targa Resources
TRGP
$57.4B
| $548K | ﹤0.01% |
6,400
+2,800
| +78% | +$232K |
|
3295
PUT
BorgWarner
BWA
$13.1B
| $547K | ﹤0.01% |
16,800
+4,758
| +40% | +$202K |
|
3296
Healthpeak Properties
DOC
$15.5B
| $547K | ﹤0.01% |
29,813
-194
| -0.6% | -$3.98K |
|
|
DVAX
3297
PUT
DELISTED
Dynavax Technologies
DVAX
| $547K | ﹤0.01% |
37,100
+31,900
| +613% | +$449K |
|
3298
CALL
Acuity Brands
AYI
$10.1B
| $544K | ﹤0.01% |
3,200
+2,300
| +256% | +$375K |
|
3299
CALL
WillScot Mobile Mini Holdings
WSC
$4.85B
| $544K | ﹤0.01% |
13,100
-4,500
| -26% | -$198K |
|
|
VRN
3300
CALL
DELISTED
Veren
VRN
| $544K | ﹤0.01% |
65,600
-46,800
| -42% | -$373K |
|
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.