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 | Miscellaneous | 98.25% |
| 2 | Technology | 0.44% |
| 3 | Consumer Discretionary | 0.32% |
| 4 | Healthcare | 0.22% |
| 5 | Financials | 0.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1476
PUT
Nice
NICE
$5.93B
| $4.17M | ﹤0.01% |
24,500
+15,900
| +185% | +$3.16M |
|
1477
CALL
ACM Research
ACMR
$5.35B
| $4.15M | ﹤0.01% |
229,200
+127,300
| +125% | +$1.89M |
|
1478
PUT
Campbell Soup
CPB
$6.29B
| $4.13M | ﹤0.01% |
100,600
-114,200
| -53% | -$5M |
|
1479
PUT
Snap-on
SNA
$19.7B
| $4.13M | ﹤0.01% |
16,200
+7,300
| +82% | +$1.97M |
|
1480
PUT
STAAR Surgical
STAA
$1.18B
| $4.13M | ﹤0.01% |
102,800
+70,300
| +216% | +$3.29M |
|
1481
PUT
Bank of Hawaii
BOH
$3.03B
| $4.11M | ﹤0.01% |
82,800
-11,600
| -12% | -$596K |
|
1482
CALL
Canadian Solar
CSIQ
$931M
| $4.1M | ﹤0.01% |
166,600
-67,300
| -29% | -$2.13M |
|
1483
CALL
Travelers Companies
TRV
$76B
| $4.1M | ﹤0.01% |
25,100
-69,200
| -73% | -$11.6M |
|
1484
CALL
FirstEnergy
FE
$27.1B
| $4.1M | ﹤0.01% |
119,900
+34,400
| +40% | +$1.28M |
|
1485
CALL
Alnylam Pharmaceuticals
ALNY
$35.7B
| $4.09M | ﹤0.01% |
23,100
+200
| +0.9% | +$38.2K |
|
1486
United Rentals
URI
$63.1B
| $4.07M | ﹤0.01% |
9,148
+8,947
| +4,451% | +$4.1M |
|
|
DENT
1487
PUT
DELISTED
AdvisorShares Dent Tactical ETF
DENT
| $4.06M | ﹤0.01% |
519,500
+198,600
| +62% | +$1.55M |
|
1488
BWX Technologies
BWXT
$14.5B
| $4.02M | ﹤0.01% |
+53,678
| New | +$3.88M |
|
1489
PUT
InMode
INMD
$851M
| $4.02M | ﹤0.01% |
132,000
+11,900
| +10% | +$467K |
|
|
AVB
1490
CALL
DELISTED
AvalonBay Communities
AVB
| $4.02M | ﹤0.01% |
23,400
+15,700
| +204% | +$2.9M |
|
1491
CALL
W.W. Grainger
GWW
$60.9B
| $4.01M | ﹤0.01% |
5,800
+4,500
| +346% | +$3.25M |
|
1492
PUT
Vita Coco
COCO
$3.17B
| $4.01M | ﹤0.01% |
154,000
+144,000
| +1,440% | +$3.84M |
|
1493
Robinhood
HOOD
$111B
| $4.01M | ﹤0.01% |
408,474
-46,545
| -10% | -$516K |
|
1494
CALL
Takeda Pharmaceutical
TAK
$58.7B
| $4.01M | ﹤0.01% |
259,000
+240,500
| +1,300% | +$3.72M |
|
1495
CALL
Virgin Galactic
SPCE
$470M
| $4M | ﹤0.01% |
111,205
-11,830
| -10% | -$705K |
|
1496
CALL
Rockwell Automation
ROK
$47.8B
| $4M | ﹤0.01% |
14,000
+9,900
| +241% | +$3.06M |
|
1497
CALL
Mativ Holdings
MATV
$690M
| $4M | ﹤0.01% |
280,600
+276,500
| +6,744% | +$4.42M |
|
1498
PUT
Papa John's
PZZA
$751M
| $4M | ﹤0.01% |
58,600
+12,900
| +28% | +$997K |
|
1499
Rio Tinto
RIO
$171B
| $4M | ﹤0.01% |
62,801
+45,836
| +270% | +$2.92M |
|
|
FLNA
1500
CALL
Filana Therapeutics
FLNA
$36.7M
| $4M | ﹤0.01% |
240,200
+165,900
| +223% | +$3.29M |
|
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's Q3 2023 filing shows 1,401 new, 3,688 increased, 3,363 reduced and 1,719 closed positions. Its largest new stake was Amazon: 841,102 shares worth $107M. The largest sale was Netflix, an estimated $27.1M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- 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 1,401 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.