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 | |
|---|---|---|---|---|---|---|
2201
PUT
Cincinnati Financial
CINF
$28.3B
| $2.19M | ﹤0.01% |
16,100
-8,500
| -35% | -$1.1M |
|
2202
CALL
Huntsman Corp
HUN
$2.24B
| $2.19M | ﹤0.01% |
90,500
-43,800
| -33% | -$972K |
|
|
MZTI
2203
CALL
The Marzetti Company
MZTI
$2.94B
| $2.19M | ﹤0.01% |
12,400
+8,700
| +235% | +$1.6M |
|
|
CHGX
2204
CALL
DELISTED
AXS Change Finance ESG ETF
CHGX
| $2.19M | ﹤0.01% |
65,300
-6,700
| -9% | -$247K |
|
2205
PUT
WisdomTree US Total Dividend Fund
DTD
$1.65B
| $2.19M | ﹤0.01% |
20,700
-13,400
| -39% | -$986K |
|
2206
CALL
Loar Holdings
LOAR
$6.64B
| $2.18M | ﹤0.01% |
29,200
+24,700
| +549% | +$1.64M |
|
2207
CALL
Glaukos
GKOS
$9.02B
| $2.17M | ﹤0.01% |
16,700
+11,700
| +234% | +$1.46M |
|
|
TPC
2208
CALL
Tutor Perini Cor
TPC
$4.57B
| $2.17M | ﹤0.01% |
80,100
+55,000
| +219% | +$1.26M |
|
2209
CALL
Chord Energy
CHRD
$7.79B
| $2.17M | ﹤0.01% |
16,700
-9,100
| -35% | -$1.4M |
|
|
TLN
2210
CALL
Talen Energy Corp
TLN
$17.2B
| $2.17M | ﹤0.01% |
+12,200
| New | +$1.72M |
|
2211
CALL
United States Brent Oil Fund
BNO
$815M
| $2.17M | ﹤0.01% |
76,700
+52,600
| +218% | +$1.59M |
|
2212
CALL
Commercial Metals
CMC
$7.63B
| $2.17M | ﹤0.01% |
39,500
+2,600
| +7% | +$141K |
|
2213
CALL
Silicon Motion
SIMO
$9.19B
| $2.16M | ﹤0.01% |
35,500
+4,100
| +13% | +$270K |
|
2214
PUT
AvePoint
AVPT
$2.6B
| $2.15M | ﹤0.01% |
183,100
-225,100
| -55% | -$2.47M |
|
2215
PUT
Goodyear
GT
$2.07B
| $2.15M | ﹤0.01% |
242,700
+48,500
| +25% | +$458K |
|
2216
PUT
Tencent Music
TME
$14.5B
| $2.14M | ﹤0.01% |
177,800
+34,200
| +24% | +$419K |
|
2217
PUT
Cirrus Logic
CRUS
$6.74B
| $2.14M | ﹤0.01% |
17,200
+13,100
| +320% | +$1.73M |
|
|
APLS
2218
DELISTED
Apellis Pharmaceuticals
APLS
| $2.13M | ﹤0.01% |
73,982
+3,910
| +6% | +$145K |
|
2219
PUT
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$4.9B
| $2.13M | ﹤0.01% |
61,800
+7,100
| +13% | +$228K |
|
2220
PUT
Intellia Therapeutics
NTLA
$1.5B
| $2.13M | ﹤0.01% |
103,600
+31,800
| +44% | +$733K |
|
|
AZPN
2221
CALL
DELISTED
Aspen Technology Inc
AZPN
| $2.13M | ﹤0.01% |
8,900
+3,600
| +68% | +$757K |
|
2222
CALL
BlackBerry
BB
$5.01B
| $2.12M | ﹤0.01% |
810,800
+318,700
| +65% | +$759K |
|
2223
Hecla Mining
HL
$10.2B
| $2.12M | ﹤0.01% |
318,238
-14,475
| -4% | -$84.6K |
|
2224
CALL
InMode
INMD
$872M
| $2.12M | ﹤0.01% |
125,100
+19,800
| +19% | +$334K |
|
2225
Lantheus
LNTH
$6.82B
| $2.12M | ﹤0.01% |
19,292
+15,414
| +397% | +$1.6M |
|
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.