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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4801
CALL
NET Power
NPWR
$120M
| $152K | ﹤0.01% |
21,700
-33,300
| -61% | -$280K |
|
4802
CALL
PSQ Holdings
PSQH
$12.4M
| $152K | ﹤0.01% |
4,120
-367
| -8% | -$15.9K |
|
|
CDMO
4803
CALL
DELISTED
Avid Bioservices, Inc. Common Stock
CDMO
| $152K | ﹤0.01% |
13,400
-1,100
| -8% | -$11K |
|
4804
PUT
ADMA Biologics
ADMA
$2.02B
| $151K | ﹤0.01% |
7,600
-900
| -11% | -$14K |
|
|
CAN
4805
Canaan Creative
CAN
$172M
| $151K | ﹤0.01% |
149,773
-43,876
| -23% | -$43.6K |
|
4806
CALL
Fresenius Medical Care
FMS
$13.4B
| $151K | ﹤0.01% |
7,100
-29,000
| -80% | -$571K |
|
4807
PUT
Ingredion
INGR
$6.42B
| $151K | ﹤0.01% |
1,100
+600
| +120% | +$76.3K |
|
|
IPG
4808
PUT
DELISTED
Interpublic Group of Companies
IPG
| $151K | ﹤0.01% |
4,800
+2,500
| +109% | +$76.7K |
|
4809
Liberty Latin America Class C
LILAK
$1.69B
| $151K | ﹤0.01% |
17,527
+1,692
| +11% | +$14.8K |
|
|
BMTX
4810
PUT
DELISTED
BM Technologies, Inc.
BMTX
| $151K | ﹤0.01% |
44,600
-6,400
| -13% | -$18.2K |
|
4811
CALL
Future Fuel
FF
$205M
| $150K | ﹤0.01% |
26,200
-18,100
| -41% | -$101K |
|
4812
CALL
American Century Diversified Corporate Bond ETF
KORP
$869M
| $150K | ﹤0.01% |
1,600
-800
| -33% | -$37.9K |
|
4813
PUT
Lincoln Educational Services
LINC
$1.38B
| $150K | ﹤0.01% |
12,600
+4,200
| +50% | +$52.2K |
|
|
ACH
4814
CALL
Accendra Health
ACH
$254M
| $150K | ﹤0.01% |
9,600
+4,900
| +104% | +$74.2K |
|
4815
PUT
Option Care Health
OPCH
$3.58B
| $150K | ﹤0.01% |
4,800
-600
| -11% | -$18.4K |
|
|
ORGN
4816
PUT
DELISTED
Origin Materials
ORGN
| $150K | ﹤0.01% |
3,257
+1,897
| +139% | +$68.7K |
|
4817
CALL
Pacer Trendpilot US Large Cap ETF
PTLC
$3.19B
| $150K | ﹤0.01% |
2,800
-2,300
| -45% | -$116K |
|
|
SF
4818
PUT
Stifel
SF
$12.4B
| $150K | ﹤0.01% |
2,400
-3,000
| -56% | -$171K |
|
4819
PUT
Zevra Therapeutics
ZVRA
$578M
| $150K | ﹤0.01% |
21,700
+10,000
| +85% | +$67.9K |
|
4820
California Resources
CRC
$4.49B
| $149K | ﹤0.01% |
2,841
-50,629
| -95% | -$2.56M |
|
4821
CALL
Carter's
CRI
$1.43B
| $149K | ﹤0.01% |
2,300
-1,400
| -38% | -$89.9K |
|
4822
CALL
Fulgent Genetics
FLGT
$558M
| $149K | ﹤0.01% |
6,900
+5,800
| +527% | +$130K |
|
4823
PUT
Golub Capital BDC
GBDC
$3.33B
| $149K | ﹤0.01% |
9,900
+7,500
| +313% | +$113K |
|
4824
CALL
Monte Rosa Therapeutics
GLUE
$1.82B
| $149K | ﹤0.01% |
28,200
+12,200
| +76% | +$61.6K |
|
4825
CALL
Helix Energy Solutions
HLX
$1.34B
| $149K | ﹤0.01% |
13,500
-5,500
| -29% | -$60.5K |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.