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 |
Alibaba
BABA
|
+$120M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$93.9M |
| 3 |
Walt Disney
DIS
|
+$71.7M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.7M |
| 5 |
Citigroup
C
|
+$39.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$136M |
| 2 |
Amazon
AMZN
|
+$118M |
| 3 |
SPDR Gold Trust
GLD
|
+$56.2M |
| 4 |
Microsoft
MSFT
|
+$52.4M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$45.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.33% |
| 2 | Consumer Discretionary | 0.3% |
| 3 | Communication Services | 0.21% |
| 4 | Financials | 0.19% |
| 5 | Healthcare | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2851
PUT
Novavax
NVAX
$1.23B
| $1.18M | ﹤0.01% |
246,600
-66,100
| -21% | -$405K |
|
2852
CALL
Sprouts Farmers Market
SFM
$7.04B
| $1.18M | ﹤0.01% |
24,600
-400
| -2% | -$17.5K |
|
2853
PUT
Otis Worldwide
OTIS
$27.4B
| $1.18M | ﹤0.01% |
13,200
+800
| +6% | +$66.5K |
|
2854
CALL
Immunovant
IMVT
$8.09B
| $1.18M | ﹤0.01% |
28,000
-37,200
| -57% | -$1.37M |
|
2855
CALL
Smith & Wesson
SWBI
$655M
| $1.18M | ﹤0.01% |
87,000
+52,100
| +149% | +$717K |
|
2856
CALL
Ameriprise Financial
AMP
$46.8B
| $1.18M | ﹤0.01% |
3,100
-300
| -9% | -$103K |
|
|
DISH
2857
CALL
DELISTED
DISH Network Corp.
DISH
| $1.18M | ﹤0.01% |
985,200
+449,100
| +84% | +$2.02M |
|
2858
PUT
Ares Capital
ARCC
$13.5B
| $1.17M | ﹤0.01% |
58,500
-67,500
| -54% | -$1.32M |
|
2859
CALL
Owens Corning
OC
$11.5B
| $1.17M | ﹤0.01% |
7,900
-1,800
| -19% | -$238K |
|
2860
PUT
Raymond James Financial
RJF
$32.5B
| $1.17M | ﹤0.01% |
10,500
-27,200
| -72% | -$2.8M |
|
2861
Flex
FLEX
$43.4B
| $1.17M | ﹤0.01% |
50,950
-36,885
| -42% | -$738K |
|
2862
Simplify Short Term Treasury Futures Strategy ETF
TUA
$712M
| $1.17M | ﹤0.01% |
50,501
+50,345
| +32,272% | +$1.12M |
|
|
EXAS
2863
DELISTED
Exact Sciences
EXAS
| $1.17M | ﹤0.01% |
+15,789
| New | +$1.03M |
|
2864
PUT
Trimble
TRMB
$12.3B
| $1.17M | ﹤0.01% |
21,900
+18,700
| +584% | +$892K |
|
2865
PUT
XP
XP
$8.62B
| $1.17M | ﹤0.01% |
44,700
+10,900
| +32% | +$249K |
|
2866
CALL
Skywest
SKYW
$4.11B
| $1.16M | ﹤0.01% |
22,300
-14,700
| -40% | -$661K |
|
2867
PUT
Emcor
EME
$33.1B
| $1.16M | ﹤0.01% |
5,400
+2,400
| +80% | +$504K |
|
2868
Shoals Technologies Group
SHLS
$1.58B
| $1.16M | ﹤0.01% |
+74,875
| New | +$1.13M |
|
|
GOGL
2869
DELISTED
Golden Ocean Group
GOGL
| $1.16M | ﹤0.01% |
119,125
+44,753
| +60% | +$373K |
|
2870
PUT
Revolve Group
RVLV
$1.79B
| $1.16M | ﹤0.01% |
70,100
-355,800
| -84% | -$5.25M |
|
|
VRNA
2871
DELISTED
Verona Pharma
VRNA
| $1.16M | ﹤0.01% |
58,422
+54,568
| +1,416% | +$806K |
|
2872
PUT
Brookfield Infrastructure
BIPC
$5.11B
| $1.16M | ﹤0.01% |
32,900
-42,300
| -56% | -$1.35M |
|
2873
FuboTV Inc
FUBO
$245M
| $1.16M | ﹤0.01% |
30,412
+24,935
| +455% | +$863K |
|
2874
Union Pacific
UNP
$183B
| $1.16M | ﹤0.01% |
4,721
-87,931
| -95% | -$19.3M |
|
2875
CALL
BWX Technologies
BWXT
$16B
| $1.16M | ﹤0.01% |
15,100
+12,200
| +421% | +$938K |
|
Similar funds
Simplex Trading's Q4 2023 Portfolio in Review
As of Q4 2023, Simplex Trading held 10,333 positions worth $156B, up 23% from $127B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading deployed $15.1B of net new capital in Q4 2023, opening 1,639 new positions and adding to 3,920 existing holdings. Its largest new stake was Walt Disney: 812,984 shares worth $73.4M.
By sector, the portfolio is most concentrated in Technology at 0.33% of assets, down from 0.44% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was iShares 20+ Year Treasury Bond ETF, an estimated $136M trimmed.
- Simplex Trading's largest Q4 2023 buy was Walt Disney: 812,984 shares worth $73.4M.
- Simplex Trading added most to Alibaba in Q4 2023, an estimated $120M increase.
- Simplex Trading's biggest Q4 2023 reduction was iShares 20+ Year Treasury Bond ETF, cutting an estimated $136M.
- Simplex Trading fully exited Amazon in Q4 2023, selling an estimated $118M.
- Simplex Trading's ten largest holdings make up 42% of its $156B portfolio in Q4 2023.
- Simplex Trading opened 1,639 new positions and closed 1,508 in Q4 2023.
- Simplex Trading's portfolio value rose 23% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q4 2023, filed 2 Feb 2024.