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 | |
|---|---|---|---|---|---|---|
3001
CALL
Gerdau
GGB
$9.44B
| $1M | ﹤0.01% |
250,680
-91,440
| -27% | -$350K |
|
3002
PUT
FIVE9
FIVN
$1.77B
| $999K | ﹤0.01% |
12,700
-58,200
| -82% | -$4.05M |
|
3003
CALL
Federal Realty Investment Trust
FRT
$10.9B
| $999K | ﹤0.01% |
9,700
+8,000
| +471% | +$755K |
|
3004
PUT
The GEO Group
GEO
$4.13B
| $998K | ﹤0.01% |
92,200
+55,400
| +151% | +$529K |
|
|
TEN
3005
Tsakos Energy Navigation Ltd
TEN
$1.19B
| $996K | ﹤0.01% |
44,841
+20,986
| +88% | +$447K |
|
3006
CALL
WisdomTree US Total Dividend Fund
DTD
$1.65B
| $995K | ﹤0.01% |
12,500
-13,900
| -53% | -$855K |
|
|
MOR
3007
PUT
DELISTED
MorphoSys AG American Depositary Shares
MOR
| $995K | ﹤0.01% |
100,600
+100,200
| +25,050% | +$736K |
|
3008
CALL
Leggett & Platt
LEG
$1.52B
| $991K | ﹤0.01% |
37,900
+26,300
| +227% | +$645K |
|
3009
Mid-America Apartment Communities
MAA
$15.6B
| $991K | ﹤0.01% |
7,373
+6,707
| +1,007% | +$853K |
|
3010
AGCO
AGCO
$8.78B
| $990K | ﹤0.01% |
+8,155
| New | +$954K |
|
3011
CALL
Acadia Pharmaceuticals
ACAD
$4.25B
| $989K | ﹤0.01% |
31,600
-18,900
| -37% | -$451K |
|
3012
Hudbay
HBM
$9.92B
| $988K | ﹤0.01% |
179,027
+111,348
| +165% | +$522K |
|
3013
PUT
Tenaris
TS
$29.1B
| $987K | ﹤0.01% |
28,400
+23,100
| +436% | +$774K |
|
3014
CALL
Trinity Industries
TRN
$2.97B
| $986K | ﹤0.01% |
37,100
+16,000
| +76% | +$385K |
|
3015
PUT
CVR Energy
CVI
$3.36B
| $984K | ﹤0.01% |
32,500
+13,200
| +68% | +$417K |
|
3016
CALL
Centrus Energy
LEU
$3.22B
| $984K | ﹤0.01% |
18,100
-24,100
| -57% | -$1.26M |
|
3017
CALL
Ericsson
ERIC
$30.7B
| $983K | ﹤0.01% |
156,100
-3,600
| -2% | -$18.2K |
|
|
TIGR
3018
PUT
UP Fintech Holding
TIGR
$845M
| $983K | ﹤0.01% |
222,500
+18,500
| +9% | +$85.3K |
|
3019
CALL
Fortune Brands Innovations
FBIN
$6.12B
| $982K | ﹤0.01% |
+12,900
| New | +$849K |
|
3020
CALL
Hess Midstream
HESM
$5.22B
| $977K | ﹤0.01% |
30,900
+24,800
| +407% | +$759K |
|
|
CHX
3021
CALL
DELISTED
ChampionX
CHX
| $975K | ﹤0.01% |
33,400
+1,400
| +4% | +$43.3K |
|
3022
CALL
Kaiser Aluminum
KALU
$2.67B
| $975K | ﹤0.01% |
+13,700
| New | +$868K |
|
3023
PUT
Groupon
GRPN
$980M
| $974K | ﹤0.01% |
75,900
-104,600
| -58% | -$1.26M |
|
3024
CALL
Maximus
MMS
$3.14B
| $972K | ﹤0.01% |
11,600
+9,900
| +582% | +$790K |
|
3025
Royalty Pharma
RPRX
$26.1B
| $972K | ﹤0.01% |
34,615
-12,897
| -27% | -$354K |
|
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.