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 | |
|---|---|---|---|---|---|---|
2176
PUT
Aecom
ACM
$9.07B
| $2.25M | ﹤0.01% |
21,800
-33,100
| -60% | -$3.11M |
|
2177
CALL
Aurora
AUR
$11.7B
| $2.25M | ﹤0.01% |
380,200
+161,300
| +74% | +$672K |
|
|
NUVL
2178
PUT
DELISTED
Nuvalent
NUVL
| $2.25M | ﹤0.01% |
22,000
+20,300
| +1,194% | +$1.68M |
|
2179
Cisco
CSCO
$450B
| $2.25M | ﹤0.01% |
42,222
-466,362
| -92% | -$22.7M |
|
2180
CALL
Green Plains
GPRE
$1.19B
| $2.25M | ﹤0.01% |
166,000
+53,600
| +48% | +$785K |
|
2181
AdvisorShares Pure US Cannabis ETF
MSOS
$864M
| $2.25M | ﹤0.01% |
313,486
+34,125
| +12% | +$242K |
|
2182
CALL
Coca-Cola Europacific Partners
CCEP
$46.5B
| $2.24M | ﹤0.01% |
28,500
+26,400
| +1,257% | +$2.02M |
|
2183
PUT
CoStar Group
CSGP
$11.3B
| $2.24M | ﹤0.01% |
29,700
-4,600
| -13% | -$349K |
|
2184
CALL
MSC Industrial Direct
MSM
$7.02B
| $2.24M | ﹤0.01% |
26,000
+19,700
| +313% | +$1.61M |
|
2185
CALL
RUM Group Inc
RUM
$1.57B
| $2.23M | ﹤0.01% |
416,000
-55,800
| -12% | -$329K |
|
|
TBCH
2186
PUT
Turtle Beach Corp
TBCH
$239M
| $2.23M | ﹤0.01% |
145,300
+106,300
| +273% | +$1.55M |
|
2187
PUT
First Horizon
FHN
$12.1B
| $2.22M | ﹤0.01% |
143,200
-158,900
| -53% | -$2.52M |
|
2188
PUT
Corcept Therapeutics
CORT
$10.2B
| $2.22M | ﹤0.01% |
48,000
-61,300
| -56% | -$2.18M |
|
2189
CALL
Solventum
SOLV
$13.5B
| $2.22M | ﹤0.01% |
31,800
+12,600
| +66% | +$758K |
|
2190
CALL
Wendy's
WEN
$1.33B
| $2.21M | ﹤0.01% |
126,300
+11,100
| +10% | +$189K |
|
2191
CALL
LKQ Corp
LKQ
$6.58B
| $2.21M | ﹤0.01% |
55,300
+20,900
| +61% | +$861K |
|
2192
CALL
H&R Block
HRB
$5.18B
| $2.21M | ﹤0.01% |
34,700
+2,200
| +7% | +$131K |
|
2193
CALL
Helen of Troy
HELE
$663M
| $2.2M | ﹤0.01% |
35,600
+8,600
| +32% | +$509K |
|
2194
CALL
Xylem
XYL
$28.5B
| $2.2M | ﹤0.01% |
16,300
-15,500
| -49% | -$2.07M |
|
2195
CALL
United States Copper Index Fund
CPER
$742M
| $2.2M | ﹤0.01% |
77,600
+63,300
| +443% | +$1.68M |
|
|
BERY
2196
DELISTED
Berry Global Group, Inc.
BERY
| $2.2M | ﹤0.01% |
35,228
+17,582
| +100% | +$1.04M |
|
2197
CALL
Check Point Software Technologies
CHKP
$13.3B
| $2.2M | ﹤0.01% |
11,400
-24,700
| -68% | -$4.52M |
|
|
DOCU
2198
DocuSign
DOCU
$9.63B
| $2.2M | ﹤0.01% |
35,412
+32,189
| +999% | +$1.8M |
|
2199
PUT
Fastly Inc
FSLY
$3.17B
| $2.19M | ﹤0.01% |
289,900
-68,600
| -19% | -$476K |
|
|
JNPR
2200
CALL
DELISTED
Juniper Networks
JNPR
| $2.19M | ﹤0.01% |
56,300
+32,800
| +140% | +$1.25M |
|
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.