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 | |
|---|---|---|---|---|---|---|
2851
CALL
TripAdvisor
TRIP
$1.59B
| $1.1M | ﹤0.01% |
75,700
-177,100
| -70% | -$2.75M |
|
2852
CALL
Apple Hospitality REIT
APLE
$3.96B
| $1.09M | ﹤0.01% |
73,800
+19,100
| +35% | +$276K |
|
2853
PUT
SM Energy
SM
$7.96B
| $1.09M | ﹤0.01% |
27,400
-31,300
| -53% | -$1.36M |
|
2854
Curtiss-Wright
CW
$27.7B
| $1.09M | ﹤0.01% |
3,325
+3,258
| +4,863% | +$964K |
|
2855
CALL
Raymond James Financial
RJF
$32.5B
| $1.09M | ﹤0.01% |
8,900
-4,600
| -34% | -$537K |
|
2856
CALL
Neumora Therapeutics
NMRA
$276M
| $1.09M | ﹤0.01% |
82,400
+82,000
| +20,500% | +$957K |
|
2857
PUT
Blackstone Secured Lending
BXSL
$5.41B
| $1.09M | ﹤0.01% |
51,900
+34,300
| +195% | +$1.04M |
|
2858
PUT
Coeur Mining
CDE
$15.6B
| $1.08M | ﹤0.01% |
157,700
+63,300
| +67% | +$395K |
|
2859
Pan American Silver
PAAS
$18.6B
| $1.08M | ﹤0.01% |
51,982
-104,262
| -67% | -$2.2M |
|
2860
Invesco CurrencyShares Swiss Franc Trust
FXF
$409M
| $1.08M | ﹤0.01% |
+10,306
| New | +$1.06M |
|
2861
CALL
Arch Capital
ACGL
$36.1B
| $1.07M | ﹤0.01% |
9,600
+4,100
| +75% | +$426K |
|
2862
PUT
Compass
COMP
$8.27B
| $1.07M | ﹤0.01% |
175,500
-78,000
| -31% | -$384K |
|
2863
CALL
Gran Tierra Energy
GTE
$260M
| $1.07M | ﹤0.01% |
171,100
-16,900
| -9% | -$135K |
|
2864
CALL
Black Diamond Therapeutics
BDTX
$101M
| $1.07M | ﹤0.01% |
246,300
+244,700
| +15,294% | +$1.33M |
|
2865
CALL
BioCryst Pharmaceuticals
BCRX
$2.37B
| $1.07M | ﹤0.01% |
140,800
-8,900
| -6% | -$67.7K |
|
2866
CALL
POET Technologies
POET
$1.19B
| $1.06M | ﹤0.01% |
238,800
+163,400
| +217% | +$510K |
|
2867
PUT
Brookfield Asset Management
BAM
$74B
| $1.06M | ﹤0.01% |
22,400
-43,500
| -66% | -$1.82M |
|
2868
StoneCo
STNE
$2.62B
| $1.05M | ﹤0.01% |
93,710
-104,533
| -53% | -$1.33M |
|
2869
PUT
Taboola.com
TBLA
$1.32B
| $1.05M | ﹤0.01% |
314,200
-235,200
| -43% | -$775K |
|
2870
PUT
Camtek
CAMT
$6.9B
| $1.05M | ﹤0.01% |
13,200
-34,200
| -72% | -$3.33M |
|
2871
CALL
St. Joe Company
JOE
$3.57B
| $1.05M | ﹤0.01% |
18,000
+700
| +4% | +$41K |
|
2872
Teva Pharmaceuticals
TEVA
$35.9B
| $1.04M | ﹤0.01% |
57,994
-238,474
| -80% | -$4.17M |
|
2873
PUT
Legend Biotech
LEGN
$4.3B
| $1.04M | ﹤0.01% |
21,400
-10,200
| -32% | -$543K |
|
2874
Zscaler
ZS
$23B
| $1.04M | ﹤0.01% |
+6,097
| New | +$1.11M |
|
2875
PUT
B&G Foods
BGS
$285M
| $1.04M | ﹤0.01% |
117,100
+16,700
| +17% | +$141K |
|
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.